What’s the top stopover airport for flights from London Heathrow Airport to Philadelphia?

Dublin (DUB) – chosen by Cheapflights users on 43% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

Flights via Washington, D.C. (IAD) have the shortest average one-way travel time for one-stop routes: 11h 41m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Philadelphia?

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 37m.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Philadelphia?

Washington, D.C. (IAD) is the most affordable one-stop option, with an average return flight price of £527.

How long is the flight from London Heathrow Airport to Philadelphia?

Airlines like United Airlines and Austrian Airlines fly from London Heathrow Airport to Philadelphia in about 16h 12m. The time it takes to get you to your destination can typically vary by up to 5h 44m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?

Our cheapest airline available from London Heathrow Airport to Philadelphia is United Airlines. Our recent data shows that you can find tickets from as low as £299 on this airline. Additional options worth looking into are Icelandair and Air Canada, starting at £331 and £333 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £360. However, be on the lookout for offers from Delta and British Airways, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.

Weekly flight availability from London Heathrow Airport to Philadelphia

The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).

In terms of precipitation, rainfall in Philadelphia ranges from 69.0 - 112.0 inches per month. July is typically the wettest month, when rainfall can reach 112.0 mm. February is typically the driest time to visit Philadelphia when rainfall is around 69.0 mm.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 1.0 C).

What are the cheapest flights from London Heathrow Airport to Philadelphia?

The cheapest flight price from London Heathrow Airport to Philadelphia is £464. On average you can expect to pay £774. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £399.

What are the most reliable airlines from London Heathrow Airport to Philadelphia?

Consider Aer Lingus (74%), American Airlines (66%) or Finnair (66%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

What are the most popular airlines that fly from London Heathrow Airport to Philadelphia?

Consider American Airlines, Air Canada or Finnair when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Philadelphia.

What is the cheapest day to fly round-trip from London Heathrow Airport to Philadelphia?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from London Heathrow Airport to Philadelphia?

The best pricing can be found in the month of February. Prices to Philadelphia from London Heathrow Airport average £543. You can even find prices in February for less than £543, as users have found deals to Philadelphia from as low as £386. The month of August appears to be one of the more expensive times to travel to Philadelphia from London Heathrow Airport. Flying in the targeted month can save you up to 23%.

What airport do you fly into for flights to Philadelphia from London Heathrow?

Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 15 inbound flights from London Heathrow per day from 11 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?

Yes. In addition to deals on Heathrow to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Philadelphia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Philadelphia.

Can I find deals for business class flights from Heathrow to Philadelphia?

Yes. Cheapflights offers flight deals from Heathrow to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£360+ Flights from London Heathrow Airport to Philadelphia

Q: How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Airfare is below average for this route at the moment. London Heathrow Airport to Philadelphia flights typically cost between £458 and £561 in November. The cheapest return flight price found within the last 3 days was £439 on Multiple Airlines (28 Nov-3 Dec).

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to Philadelphia

Round-trip from	£439
One-way from	£360
Popular in	December
Cheapest in	March
Average price	£493
Good round-trip deal	£498 or less
Good one-way deal	£540 or less

28/11-3/12
4 total stops
27h 21m total
London to Philadelphia

Search Deals

Aer Lingus
24/9
1 total stop
10h 35m total
London to Philadelphia

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£16 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from London Heathrow to Philadelphia.

Search Deals

Price to beat on a one-way flight from London Heathrow to Philadelphia.

Search Deals

Find flight deals from Heathrow to Philadelphia

Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Fri 28/1113:30LHR - PHL

2 stops14h 26mMultiple Airlines

Wed 3/1213:15PHL - LHR

2 stops12h 55mMultiple Airlines

Deal found 15/9£439

Thu 16/1008:30LHR - PHL

1 stop12h 30mMultiple Airlines

Thu 23/1015:25PHL - LHR

1 stop13h 10mMultiple Airlines

Deal found 16/9£440

Mon 3/1106:30LHR - PHL

1 stop12h 25mBritish Airways

Mon 1/1219:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 15/9£441

Mon 24/1109:20LHR - PHL

1 stop17h 37mJetBlue

Sat 6/1216:32PHL - LHR

1 stop9h 23mJetBlue

Deal found 15/9£443

Wed 15/1012:00LHR - PHL

1 stop12h 00mAer Lingus

Wed 22/1020:30PHL - LHR

1 stop9h 40mAer Lingus

Deal found 15/9£444

Wed 24/907:30LHR - PHL

1 stop13h 30mUnited Airlines

Wed 1/1015:25PHL - LHR

1 stop10h 05mUnited Airlines

Deal found 15/9£445

Fri 17/1008:40LHR - PHL

2 stops21h 05mUnited Airlines

Thu 23/1010:32PHL - LHR

1 stop15h 23mUnited Airlines

Deal found 15/9£446

Tue 23/906:50LHR - PHL

2 stops19h 48mAir Canada

Sat 4/1009:20PHL - LHR

2 stops18h 15mAir Canada

Deal found 14/9£447

Fri 5/1206:50LHR - PHL

2 stops12h 57mAir Canada

Tue 6/115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 14/9£447

Sun 12/1006:50LHR - PHL

2 stops12h 48mMultiple Airlines

Wed 22/1010:32PHL - LHR

2 stops14h 58mMultiple Airlines

Deal found 14/9£448

Mon 22/906:50LHR - PHL

2 stops13h 58mAir Canada

Mon 29/915:25PHL - LHR

2 stops15h 25mAir Canada

Deal found 14/9£449

Sat 1/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 24/1115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 14/9£450

Best flights from Heathrow to Philadelphia
Discover carefully curated flight deals from Heathrow to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Mon 29/907:45LHR - PHL

2 stops16h 12mUnited Airlines

Sat 11/1013:05PHL - LHR

1 stop14h 15mUnited Airlines

Deal found 15/9£441

Thu 5/306:00LHR - PHL

2 stops21h 56mAustrian Airlines

Mon 9/316:35PHL - LHR

2 stops22h 05mAustrian Airlines

Deal found 14/9£450

Wed 11/310:05LHR - PHL

Nonstop8h 05mBritish Airways

Mon 23/320:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 15/9£452

Thu 16/1006:50LHR - PHL

2 stops12h 48mMultiple Airlines

Thu 23/1013:05PHL - LHR

2 stops14h 30mMultiple Airlines

Deal found 16/9£453

Mon 3/1106:00LHR - PHL

2 stops20h 21mSWISS

Mon 10/1112:40PHL - LHR

2 stops17h 35mSWISS

Deal found 15/9£455

Thu 16/1008:40LHR - PHL

2 stops32h 16mUnited Airlines

Thu 23/1010:32PHL - LHR

1 stop19h 08mUnited Airlines

Deal found 16/9£447

Wed 8/1010:05LHR - PHL

Nonstop8h 00mBritish Airways

Tue 14/1018:08PHL - LHR

1 stop8h 42mBritish Airways

Deal found 15/9£460

Wed 11/313:25LHR - PHL

2 stops15h 07mMultiple Airlines

Mon 23/313:00PHL - LHR

2 stops14h 10mMultiple Airlines

Deal found 15/9£461

Thu 30/1008:30LHR - PHL

2 stops19h 45mUnited Airlines

Sun 2/1120:00PHL - LHR

2 stops34h 15mUnited Airlines

Deal found 14/9£448

Sat 21/212:05LHR - PHL

1 stop11h 59mUnited Airlines

Tue 24/215:05PHL - LHR

1 stop10h 35mUnited Airlines

Deal found 14/9£461

Direct flights from Heathrow to Philadelphia
Explore direct flight options from Heathrow to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 16 September 2025.

Mon 2/310:05LHR - PHL

Nonstop8h 05mFinnair

Mon 9/319:35PHL - LHR

Nonstop7h 00mFinnair

Deal found 15/9£447

Tue 4/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Mon 24/1119:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/9£450

Wed 11/310:05LHR - PHL

Nonstop8h 05mBritish Airways

Mon 23/320:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/9£450

Tue 7/1010:05LHR - PHL

Nonstop8h 00mBritish Airways

Tue 14/1020:00PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/9£452

Tue 4/1110:15LHR - PHL

Nonstop8h 10mFinnair

Thu 4/1218:35PHL - LHR

Nonstop7h 00mFinnair

Deal found 15/9£459

Wed 8/1012:30LHR - PHL

Nonstop8h 05mBritish Airways

Tue 14/1018:30PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 15/9£465

Mon 3/1110:15LHR - PHL

Nonstop8h 10mAmerican Airlines

Mon 10/1119:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 15/9£467

Tue 14/1010:05LHR - PHL

Nonstop8h 00mBritish Airways

Tue 21/1018:30PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 14/9£470

Mon 20/1010:05LHR - PHL

Nonstop8h 00mBritish Airways

Wed 29/1019:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 15/9£472

Mon 3/1110:15LHR - PHL

Nonstop8h 10mAmerican Airlines

Wed 3/1219:50PHL - LHR

Nonstop7h 00mAmerican Airlines

Deal found 15/9£472

Tue 4/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Tue 2/1219:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 15/9£474

Sat 1/1110:15LHR - PHL

Nonstop8h 00mBritish Airways

Mon 24/1119:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/9£480

Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 16 September 2025 and is based on user searches.

Sun 21/909:30LHR - PHL

1 stop17h 08mAir Canada

Sun 28/909:20PHL - LHR

1 stop16h 10mAir Canada

Deal found 14/9£450

Mon 22/909:30LHR - PHL

1 stop11h 30mUnited Airlines

Mon 29/915:00PHL - LHR

1 stop10h 55mUnited Airlines

Deal found 14/9£447

Mon 22/912:05LHR - PHL

2 stops14h 33mAir Canada

Mon 29/915:25PHL - LHR

2 stops15h 25mAir Canada

Deal found 15/9£448

Mon 22/920:05LHR - PHL

2 stops24h 55mMultiple Airlines

Mon 29/915:25PHL - LHR

1 stop13h 10mMultiple Airlines

Deal found 15/9£451

Tue 23/906:50LHR - PHL

2 stops19h 48mAir Canada

Sat 4/1009:20PHL - LHR

2 stops18h 15mAir Canada

Deal found 14/9£447

Tue 23/906:50LHR - PHL

2 stops19h 48mAir Canada

Fri 3/1015:25PHL - LHR

2 stops15h 25mAir Canada

Deal found 14/9£452

Wed 24/907:30LHR - PHL

1 stop13h 30mUnited Airlines

Wed 1/1015:25PHL - LHR

1 stop10h 05mUnited Airlines

Deal found 15/9£445

Wed 24/907:50LHR - PHL

1 stop13h 05mAmerican Airlines

Wed 1/1019:35PHL - LHR

Nonstop7h 20mAmerican Airlines

Deal found 15/9£450

One-way flights from Heathrow to Philadelphia
Search for one-way flight options from Heathrow to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Wed 24/913:25LHR - PHL

1 stop10h 35mAer Lingus

Deal found 15/9£360

Wed 1/1015:05LHR - PHL

2 stops58h 50mMultiple Airlines

Deal found 15/9£361

Tue 18/1111:45LHR - PHL

2 stops16h 21mDelta

Deal found 16/9£361

Mon 15/1206:30LHR - PHL

1 stop12h 25mBritish Airways

Deal found 15/9£362

Tue 16/1208:50LHR - PHL

1 stop12h 10mAer Lingus

Deal found 15/9£364

Thu 9/1020:50LHR - PHL

3 stops48h 56mMultiple Airlines

Deal found 15/9£365

Mon 22/919:35LHR - PHL

1 stop28h 25mAer Lingus

Deal found 15/9£368

Tue 30/916:50LHR - PHL

1 stop31h 10mAer Lingus

Deal found 15/9£369

Thu 4/1208:50LHR - PHL

1 stop12h 10mAer Lingus

Deal found 15/9£372

Sat 6/1209:55LHR - PHL

2 stops19h 59mMultiple Airlines

Deal found 15/9£374

Fri 12/1215:30LHR - PHL

3 stops38h 24mMultiple Airlines

Deal found 15/9£375

Sat 22/1106:30LHR - PHL

1 stop12h 25mMultiple Airlines

Deal found 15/9£378

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 29/9

07:45-18:57

2 stops16h 12m

Philadelphia

Sat 11/10

13:05-08:20

1 stop14h 15m

£441

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 16/10

08:40-11:56

2 stops32h 16m

Philadelphia

Thu 23/10

10:32-10:40

1 stop19h 08m

£447

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 30/10

08:30-00:15

2 stops19h 45m

Philadelphia

Sun 2/11

20:00-11:15

2 stops34h 15m

£448

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

06:00-22:56

2 stops21h 56m

Philadelphia

Mon 9/3

16:35-18:40

2 stops22h 05m

£450

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 11/3

10:05-14:10

Nonstop8h 05m

Philadelphia

Mon 23/3

20:45-07:50

Nonstop7h 05m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 16/10

06:50-14:38

2 stops12h 48m

Philadelphia

Thu 23/10

13:05-08:35

2 stops14h 30m

£453

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 3/11

06:00-21:21

2 stops20h 21m

Philadelphia

Mon 10/11

12:40-11:15

2 stops17h 35m

£455

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 8/10

10:05-13:05

Nonstop8h 00m

Philadelphia

Tue 14/10

18:08-07:50

1 stop8h 42m

£460

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 11/3

13:25-00:32

2 stops15h 07m

Philadelphia

Mon 23/3

13:00-07:10

2 stops14h 10m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 21/2

12:05-19:04

1 stop11h 59m

Philadelphia

Tue 24/2

15:05-06:40

1 stop10h 35m

£461

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 21 results

Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Philadelphia

Prices

Airlines

How far ahead should I book a flight from London Heathrow Airport to Philadelphia?

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 79 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to PHL?

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight at midday.

What is the cheapest day to fly from London Heathrow Airport to Philadelphia?

Travellers seeking maximum savings on their London Heathrow Airport to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Reviews of airlines servicing Philadelphia

Get a feel of what it's like to fly with Finnair, United Airlines, andAer Lingus from London Heathrow Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,929 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,270 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,924 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

What airport do you fly into for flights to Philadelphia from London Heathrow?
Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 15 inbound flights from London Heathrow per day from 11 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.
How long is the flight from London Heathrow Airport to Philadelphia?
Airlines like United Airlines and Austrian Airlines fly from London Heathrow Airport to Philadelphia in about 16h 12m. The time it takes to get you to your destination can typically vary by up to 5h 44m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?
Our cheapest airline available from London Heathrow Airport to Philadelphia is United Airlines. Our recent data shows that you can find tickets from as low as £299 on this airline. Additional options worth looking into are Icelandair and Air Canada, starting at £331 and £333 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?
The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £360. However, be on the lookout for offers from Delta and British Airways, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.
What are the most reliable airlines from London Heathrow Airport to Philadelphia?
Consider Aer Lingus (74%), American Airlines (66%) or Finnair (66%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.
What are the cheapest flights from London Heathrow Airport to Philadelphia?
The cheapest flight price from London Heathrow Airport to Philadelphia is £464. On average you can expect to pay £774. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £399.
Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?
Yes. In addition to deals on Heathrow to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Philadelphia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Philadelphia.
Can I find deals for business class flights from Heathrow to Philadelphia?
Yes. Cheapflights offers flight deals from Heathrow to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?
Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Heathrow to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£299	Average£431	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£331	Average£480	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£333	Average£468	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£354	Average£496	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£407	Average£512	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£430	Average£545	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£437	Average£558	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£440	Average£583	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£447	Average£632	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£466	Average£563	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Philadelphia?

When you search for this flight from Heathrow to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Philadelphia?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Philadelphia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Philadelphia with no change fees?

Need flexible booking options for your flight to Philadelphia from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Philadelphia become cheaper?

Yes! Start tracking prices for Heathrow to Philadelphia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Philadelphia from £360

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to Philadelphia

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Heathrow to Philadelphia

Cheapest flights from Heathrow to PhiladelphiaExplore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Philadelphia

How far ahead should I book a flight from London Heathrow Airport to Philadelphia?

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

What is the cheapest time of day to fly from LHR to PHL?

What is the cheapest day to fly from London Heathrow Airport to Philadelphia?

How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Weekly flight availability from London Heathrow Airport to Philadelphia

What’s the top stopover airport for flights from London Heathrow Airport to Philadelphia?

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Philadelphia?

Reviews of airlines servicing Philadelphia

Get a feel of what it's like to fly with Finnair, United Airlines, andAer Lingus from London Heathrow Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Philadelphia from London Heathrow?

How long is the flight from London Heathrow Airport to Philadelphia?

What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

What are the most reliable airlines from London Heathrow Airport to Philadelphia?

What are the cheapest flights from London Heathrow Airport to Philadelphia?

Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?

How can I find direct flights from Heathrow to Philadelphia?

Can I find deals for business class flights from Heathrow to Philadelphia?

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from Heathrow to Philadelphia on these airlines

Choose from the following airlines for your flight from Heathrow to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 16 September 2025.

Top 10 airlines flying from Heathrow to Philadelphia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Philadelphia?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Philadelphia?

Can Cheapflights find flights from Heathrow to Philadelphia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Philadelphia become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.