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

Flights via Washington, D.C. (IAD) offer the fastest connection on this route, with an average stopover time of 1h 41m.

Which airline has the best punctuality record on London to Philadelphia flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 18% of flights being delayed.

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 £533.

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

Dublin (DUB) – chosen by Cheapflights users on 45% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

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.

How often are flights from London to Philadelphia delayed?

About 18% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 174 minutes.

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

Airlines like United Airlines and JetBlue fly from London Heathrow Airport to Philadelphia in about 14h 11m. The time it takes to get you to your destination can typically vary by up to 17h 24m. 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 £303 on this airline. Additional options worth looking into are Icelandair and Air Canada, starting at £335 and £337 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.

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 Friday, which is when the least amount of flights are scheduled (10 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 £356. On average you can expect to pay £730. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £416.

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

Consider Malaysia Airlines (78%), Iberia (75%) or Finnair (74%) 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 British Airways, Finnair or Iberia when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Philadelphia.

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 14 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.

£365+ 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 £511 and £666 in January. The cheapest return flight price found within the last 3 days was £440 on JetBlue (12 Jan-27 Jan).

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	£440
One-way from	£365
Popular in	December
Cheapest in	March
Average price	£578
Good round-trip deal	£501 or less
Good one-way deal	£495 or less

JetBlue
12/1-27/1
2 total stops
29h 29m total
London to Philadelphia

Search Deals

American Airlines
14/12
1 total stop
26h 50m total
London to Philadelphia

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£20 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

Enter your travel dates to find the best prices.

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 17 October 2025.

Wed 12/1113:25LHR - PHL

1 stop30h 22mAir Canada

Wed 19/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 15/10£440

Mon 17/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 24/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 15/10£441

Thu 13/1109:20LHR - PHL

1 stop11h 37mJetBlue

Mon 17/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 16/10£442

Mon 17/1113:25LHR - PHL

2 stops38h 21mAir Canada

Tue 25/1115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 15/10£442

Wed 12/1115:30LHR - PHL

1 stop29h 35mUnited Airlines

Wed 19/1109:20PHL - LHR

2 stops19h 00mUnited Airlines

Deal found 15/10£444

Wed 31/1213:30LHR - PHL

1 stop31h 35mUnited Airlines

Thu 15/109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 14/10£445

Tue 25/1106:30LHR - PHL

1 stop14h 35mUnited Airlines

Sun 30/1116:35PHL - LHR

2 stops23h 00mUnited Airlines

Deal found 16/10£449

Tue 18/1107:25LHR - PHL

2 stops30h 12mIcelandair

Thu 27/1106:00PHL - LHR

1 stop19h 55mIcelandair

Deal found 15/10£450

Thu 13/1106:50LHR - PHL

2 stops12h 57mAir Canada

Thu 20/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 16/10£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 17 October 2025.

Wed 31/1213:30LHR - PHL

1 stop31h 35mUnited Airlines

Thu 15/109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 14/10£445

Thu 5/309:20LHR - PHL

1 stop14h 11mJetBlue

Mon 9/316:48PHL - LHR

1 stop10h 07mJetBlue

Deal found 15/10£472

Thu 5/313:25LHR - PHL

1 stop30h 22mAir Canada

Mon 9/316:35PHL - LHR

2 stops24h 00mAir Canada

Deal found 16/10£491

Mon 17/1107:50LHR - PHL

1 stop11h 05mBritish Airways

Mon 24/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 15/10£510

Tue 25/1109:00LHR - PHL

2 stops17h 21mUnited Airlines

Sun 30/1109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 16/10£449

Wed 29/1013:30LHR - PHL

1 stop31h 35mUnited Airlines

Wed 5/1109:20PHL - LHR

2 stops19h 00mUnited Airlines

Deal found 15/10£466

Wed 5/1110:30LHR - PHL

1 stop34h 35mUnited Airlines

Sat 29/1109:20PHL - LHR

2 stops54h 15mUnited Airlines

Deal found 15/10£474

Sun 1/212:00LHR - PHL

2 stops32h 49mUnited Airlines

Mon 16/215:05PHL - LHR

1 stop10h 35mUnited Airlines

Deal found 14/10£487

Thu 13/1109:00LHR - PHL

2 stops18h 46mUnited Airlines

Thu 20/1117:40PHL - LHR

1 stop17h 10mUnited Airlines

Deal found 16/10£490

Tue 17/213:25LHR - PHL

1 stop30h 22mUnited Airlines

Mon 2/312:55PHL - LHR

1 stop12h 00mUnited Airlines

Deal found 16/10£505

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 17 October 2025.

Mon 17/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Tue 25/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 15/10£518

Tue 18/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Thu 27/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 15/10£520

Wed 11/313:10LHR - PHL

Nonstop8h 05mBritish Airways

Mon 23/320:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 15/10£526

Tue 25/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Wed 10/1218:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 14/10£534

Mon 17/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Mon 24/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 15/10£537

Mon 12/110:05LHR - PHL

Nonstop8h 05mBritish Airways

Tue 27/118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 14/10£540

Mon 24/1110:15LHR - PHL

Nonstop8h 10mAmerican Airlines

Mon 1/1219:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 16/10£541

Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 17 October 2025 and is based on user searches.

Tue 4/1108:30LHR - PHL

1 stop12h 35mUnited Airlines

Wed 12/1109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 15/10£451

Wed 12/1113:25LHR - PHL

1 stop30h 22mAir Canada

Wed 19/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 15/10£440

Wed 12/1115:30LHR - PHL

1 stop29h 35mUnited Airlines

Wed 19/1109:20PHL - LHR

2 stops19h 00mUnited Airlines

Deal found 15/10£444

Thu 13/1109:20LHR - PHL

1 stop11h 37mJetBlue

Mon 17/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 16/10£442

Thu 13/1106:50LHR - PHL

2 stops12h 57mAir Canada

Thu 20/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 16/10£450

Mon 17/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 24/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 15/10£441

Mon 17/1113:25LHR - PHL

2 stops38h 21mAir Canada

Tue 25/1115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 15/10£442

Tue 18/1107:25LHR - PHL

2 stops30h 12mIcelandair

Thu 27/1106:00PHL - LHR

1 stop19h 55mIcelandair

Deal found 15/10£450

Tue 25/1109:00LHR - PHL

2 stops17h 21mUnited Airlines

Sun 30/1109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 16/10£449

Thu 27/1113:45LHR - PHL

2 stops55h 06mAir Canada

Thu 4/1209:20PHL - LHR

2 stops40h 50mAir Canada

Deal found 16/10£452

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 17 October 2025.

Sun 14/1216:10LHR - PHL

1 stop26h 50mAmerican Airlines

Deal found 15/10£365

Fri 12/1215:15LHR - PHL

2 stops55h 53mMultiple Airlines

Deal found 15/10£366

Sun 11/120:25LHR - PHL

2 stops25h 51mVirgin Atlantic

Deal found 16/10£366

Sun 1/220:35LHR - PHL

1 stop22h 20mBritish Airways

Deal found 16/10£367

Tue 25/1106:00LHR - PHL

2 stops31h 53mMultiple Airlines

Deal found 15/10£368

Sun 14/1212:45LHR - PHL

1 stop30h 15mBritish Airways

Deal found 16/10£369

Thu 8/109:20LHR - PHL

1 stop17h 04mJetBlue

Deal found 16/10£369

Thu 15/106:00LHR - PHL

2 stops20h 24mTAP AIR PORTUGAL

Deal found 15/10£370

Thu 15/109:20LHR - PHL

1 stop17h 04mJetBlue

Deal found 16/10£371

Sun 11/109:50LHR - PHL

3 stops28h 56mMultiple Airlines

Deal found 15/10£372

Sun 23/1106:00LHR - PHL

2 stops30h 45mTAP AIR PORTUGAL

Deal found 15/10£372

Sun 7/1206:00LHR - PHL

2 stops20h 48mTAP AIR PORTUGAL

Deal found 16/10£373

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

Wed 31/12

13:30-16:05

1 stop31h 35m

Philadelphia

Thu 15/1

09:20-20:35

2 stops30h 15m

£445

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 25/11

09:00-21:21

2 stops17h 21m

Philadelphia

Sun 30/11

09:20-20:35

2 stops30h 15m

£449

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 29/10

13:30-17:05

1 stop31h 35m

Philadelphia

Wed 5/11

09:20-09:20

2 stops19h 00m

£466

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

09:20-18:31

1 stop14h 11m

Philadelphia

Mon 9/3

16:48-06:55

1 stop10h 07m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 5/11

10:30-16:05

1 stop34h 35m

Philadelphia

Sat 29/11

09:20-20:35

2 stops54h 15m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 1/2

12:00-15:49

2 stops32h 49m

Philadelphia

Mon 16/2

15:05-06:40

1 stop10h 35m

£487

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 13/11

09:00-22:46

2 stops18h 46m

Philadelphia

Thu 20/11

17:40-15:50

1 stop17h 10m

£490

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

13:25-14:47

1 stop30h 22m

Philadelphia

Mon 9/3

16:35-20:35

2 stops24h 00m

£491

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 17/2

13:25-14:47

1 stop30h 22m

Philadelphia

Mon 2/3

12:55-05:55

1 stop12h 00m

£505

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 17/11

07:50-13:55

1 stop11h 05m

Philadelphia

Mon 24/11

18:35-06:35

Nonstop7h 00m

£510

Flights are sorted by cheapest return flights first.

Deals found on 16/10

Showing 1-10 of 22 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

Delays

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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £304). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £341). 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 21% 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. Friday evenings 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

1,332 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

1,332 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,982 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,341 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,994 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,457 reviews

Finnair

7.6

Good

1,332 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 14 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 JetBlue fly from London Heathrow Airport to Philadelphia in about 14h 11m. The time it takes to get you to your destination can typically vary by up to 17h 24m. 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 £303 on this airline. Additional options worth looking into are Icelandair and Air Canada, starting at £335 and £337 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.
What are the most reliable airlines from London Heathrow Airport to Philadelphia?
Consider Malaysia Airlines (78%), Iberia (75%) or Finnair (74%) 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 £356. On average you can expect to pay £730. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £416.
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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £304). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £341). 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£303	Average£428	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£335	Average£472	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£337	Average£473	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£358	Average£550	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£412	Average£514	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£438	Average£556	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£444	Average£639	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
American Airlines	Cheapest£446	Average£590	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£449	Average£561	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£469	Average£568	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.

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Cheap flights from London Heathrow Airport to Philadelphia from £365

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 14/4. 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 17 October 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 17 October 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

How often are flights from London to Philadelphia delayed?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to Philadelphia flights?

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 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?

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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 17 October 2025.

Top 10 airlines flying from Heathrow to Philadelphia

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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 17 October 2025.