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

Boston (BOS) – chosen by Cheapflights users on 64% of one-stop itineraries from Philadelphia to London Heathrow Airport on Cheapflights.

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

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £640.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 07m.

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

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 2h 00m.

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

For as low as £372, United Airlines can have you in London Heathrow Airport from Philadelphia in 10h 40m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi.

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

Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £385 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £387 and £421 round-trip. Users have found that British Airways is 36% cheaper than the other options available to this destination.

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

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

Weekly flight availability from Philadelphia to London Heathrow Airport

The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (10 on average).

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

The cheapest flight price from Philadelphia to London Heathrow Airport is £299. On average you can expect to pay £464. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £347.

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

Consider Aer Lingus (78%), American Airlines (67%) or Finnair (67%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.

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

When booking a flight from Philadelphia to London Heathrow Airport, you may want to consider flying on American Airlines, JetBlue or British Airways as they are the most popular for this route.

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

Friday flights are generally found to be more expensive for flights from Philadelphia to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

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

September is one of the best times of the year to fly to London Heathrow Airport from Philadelphia. Prices for September average £579 per person but you can even find prices for as low as £364. The most expensive prices can be found in the month of June. Opting for a September flight can save you 44% on your journey compared to booking in June

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

Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 14 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

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

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

How can I find direct flights from Philadelphia to Heathrow?

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

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

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

£174+ Cheap Flights from Philadelphia to London Heathrow Airport

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

Airfare is below average for this route at the moment. Philadelphia to London Heathrow Airport flights typically cost between £447 and £564 in November. The cheapest return flight price found within the last 3 days was £362 on Aer Lingus (11 Nov-21 Nov).

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 9 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Round-trip from	£362
One-way from	£174
Popular in	June
Cheapest in	September
Average price	£485
Good round-trip deal	£463 or less
Good one-way deal	£380 or less

Aer Lingus
11/11-21/11
2 total stops
23h 50m total
Philadelphia to London

Search Deals

14/11
2 total stops
24h 15m total
Philadelphia to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£103 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£21 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 Philadelphia to London Heathrow.

Search Deals

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

Search Deals

Find flight deals from Philadelphia to Heathrow

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

Tue 11/1117:30PHL - LHR

1 stop9h 35mAer Lingus

Tue 18/1108:50LHR - PHL

1 stop12h 10mAer Lingus

Deal found 15/9£362

Fri 7/1115:30PHL - LHR

1 stop10h 40mAir Canada

Sun 9/1106:50LHR - PHL

2 stops12h 57mAir Canada

Deal found 14/9£363

Mon 29/915:25PHL - LHR

1 stop13h 10mMultiple Airlines

Tue 7/1006:50LHR - PHL

2 stops13h 59mMultiple Airlines

Deal found 13/9£364

Wed 1/1007:30PHL - LHR

2 stops20h 05mMultiple Airlines

Tue 14/1006:50LHR - PHL

2 stops13h 59mMultiple Airlines

Deal found 13/9£364

Wed 22/1018:30PHL - LHR

Nonstop7h 10mAmerican Airlines

Tue 4/1108:25LHR - PHL

1 stop12h 15mAmerican Airlines

Deal found 14/9£365

Tue 28/1019:35PHL - LHR

Nonstop7h 00mAmerican Airlines

Tue 4/1108:25LHR - PHL

1 stop12h 15mAmerican Airlines

Deal found 13/9£366

Mon 29/915:40PHL - LHR

1 stop11h 00mAmerican Airlines

Thu 9/1008:55LHR - PHL

1 stop12h 55mAmerican Airlines

Deal found 14/9£366

Wed 24/919:35PHL - LHR

Nonstop7h 20mAmerican Airlines

Wed 1/1007:55LHR - PHL

1 stop11h 00mAmerican Airlines

Deal found 13/9£369

Mon 22/916:50PHL - LHR

1 stop14h 00mAir Canada

Wed 1/1008:30LHR - PHL

2 stops18h 08mAir Canada

Deal found 13/9£369

Wed 24/915:25PHL - LHR

1 stop10h 05mUnited Airlines

Wed 1/1014:05LHR - PHL

2 stops28h 59mUnited Airlines

Deal found 13/9£372

Mon 24/1115:30PHL - LHR

2 stops24h 05mAir Canada

Fri 5/1206:50LHR - PHL

2 stops12h 57mAir Canada

Deal found 12/9£372

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

Tue 3/215:30PHL - LHR

1 stop10h 40mUnited Airlines

Tue 10/213:25LHR - PHL

2 stops33h 09mUnited Airlines

Deal found 15/9£372

Mon 26/118:35PHL - LHR

Nonstop7h 00mBritish Airways

Tue 3/213:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 15/9£380

Tue 30/912:47PHL - LHR

2 stops15h 03mDelta

Wed 15/1006:15LHR - PHL

2 stops17h 59mDelta

Deal found 15/9£389

Tue 28/1015:30PHL - LHR

1 stop11h 40mUnited Airlines

Tue 4/1113:25LHR - PHL

2 stops34h 40mUnited Airlines

Deal found 13/9£372

Wed 8/1012:23PHL - LHR

2 stops15h 27mDelta

Wed 22/1006:30LHR - PHL

2 stops15h 30mDelta

Deal found 14/9£390

Mon 9/315:30PHL - LHR

1 stop11h 40mUnited Airlines

Wed 18/313:25LHR - PHL

2 stops28h 26mUnited Airlines

Deal found 14/9£372

Mon 3/1117:40PHL - LHR

2 stops15h 10mDelta

Tue 11/1108:40LHR - PHL

2 stops15h 49mDelta

Deal found 13/9£410

Mon 24/1117:07PHL - LHR

1 stop31h 48mUnited Airlines

Fri 5/1213:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 12/9£375

Tue 2/1206:30PHL - LHR

1 stop23h 45mUnited Airlines

Thu 11/1213:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 15/9£375

Tue 18/1120:00PHL - LHR

1 stop29h 40mUnited Airlines

Mon 24/1113:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 13/9£412

Mon 3/1120:00PHL - LHR

1 stop29h 40mUnited Airlines

Mon 10/1113:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 15/9£412

Mon 27/1020:00PHL - LHR

1 stop30h 40mUnited Airlines

Sun 2/1113:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 15/9£412

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

Wed 15/1018:30PHL - LHR

Nonstop7h 10mBritish Airways

Wed 5/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Deal found 14/9£377

Tue 30/922:15PHL - LHR

Nonstop7h 05mFinnair

Wed 8/1010:05LHR - PHL

Nonstop8h 00mFinnair

Deal found 15/9£378

Tue 28/1019:35PHL - LHR

Nonstop7h 00mFinnair

Tue 4/1110:15LHR - PHL

Nonstop8h 10mFinnair

Deal found 13/9£380

Wed 12/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Tue 18/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 15/9£380

Tue 30/919:50PHL - LHR

Nonstop7h 15mAmerican Airlines

Tue 7/1012:30LHR - PHL

Nonstop8h 05mAmerican Airlines

Deal found 13/9£381

Tue 11/1119:45PHL - LHR

Nonstop7h 05mFinnair

Tue 18/1110:15LHR - PHL

Nonstop8h 10mFinnair

Deal found 15/9£382

Wed 11/320:45PHL - LHR

Nonstop7h 05mBritish Airways

Thu 26/313:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 15/9£394

Wed 1/1022:15PHL - LHR

Nonstop7h 05mBritish Airways

Tue 14/1010:05LHR - PHL

Nonstop8h 00mBritish Airways

Deal found 13/9£401

Thu 2/1018:30PHL - LHR

Nonstop7h 10mBritish Airways

Wed 8/1012:30LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 12/9£413

Tue 18/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Mon 24/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 13/9£414

Tue 2/1218:35PHL - LHR

Nonstop7h 00mFinnair

Sun 14/1213:10LHR - PHL

Nonstop8h 05mFinnair

Deal found 15/9£415

Thu 29/118:35PHL - LHR

Nonstop7h 00mBritish Airways

Thu 12/213:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 15/9£417

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

Mon 22/916:50PHL - LHR

1 stop14h 00mAir Canada

Wed 1/1009:30LHR - PHL

1 stop17h 08mAir Canada

Deal found 15/9£367

Wed 24/919:35PHL - LHR

Nonstop7h 20mAmerican Airlines

Wed 1/1007:55LHR - PHL

1 stop11h 00mAmerican Airlines

Deal found 13/9£369

Wed 24/915:25PHL - LHR

1 stop10h 05mUnited Airlines

Wed 1/1014:05LHR - PHL

2 stops28h 59mUnited Airlines

Deal found 13/9£372

Mon 29/915:25PHL - LHR

2 stops15h 25mMultiple Airlines

Tue 7/1006:50LHR - PHL

2 stops13h 59mMultiple Airlines

Deal found 13/9£363

Mon 29/915:40PHL - LHR

1 stop11h 00mAmerican Airlines

Thu 9/1008:55LHR - PHL

1 stop12h 55mAmerican Airlines

Deal found 13/9£366

Mon 29/915:25PHL - LHR

1 stop13h 10mAir Canada

Thu 9/1006:50LHR - PHL

2 stops12h 48mAir Canada

Deal found 13/9£372

Wed 1/1007:30PHL - LHR

2 stops20h 05mMultiple Airlines

Tue 14/1006:50LHR - PHL

2 stops13h 59mMultiple Airlines

Deal found 13/9£364

Wed 15/1015:25PHL - LHR

1 stop13h 10mAir Canada

Wed 5/1106:50LHR - PHL

2 stops12h 57mAir Canada

Deal found 14/9£373

Wed 22/1018:30PHL - LHR

Nonstop7h 10mAmerican Airlines

Tue 4/1108:25LHR - PHL

1 stop12h 15mAmerican Airlines

Deal found 14/9£365

Tue 28/1019:35PHL - LHR

Nonstop7h 00mAmerican Airlines

Tue 4/1108:25LHR - PHL

1 stop12h 15mAmerican Airlines

Deal found 13/9£366

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

Fri 14/1116:20PHL - LHR

2 stops24h 15mMultiple Airlines

Deal found 12/9£174

Fri 17/1016:35PHL - LHR

2 stops24h 25mMultiple Airlines

Deal found 14/9£175

Sun 12/1017:05PHL - LHR

2 stops23h 55mMultiple Airlines

Deal found 13/9£180

Thu 16/1016:03PHL - LHR

2 stops39h 42mMultiple Airlines

Deal found 13/9£185

Tue 4/1116:52PHL - LHR

1 stop9h 03mJetBlue

Deal found 13/9£194

Thu 30/1007:15PHL - LHR

2 stops24h 10mMultiple Airlines

Deal found 14/9£196

Sun 28/917:20PHL - LHR

2 stops38h 25mMultiple Airlines

Deal found 12/9£197

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/2

15:30-07:10

1 stop10h 40m

London Heathrow

Tue 10/2

13:25-17:34

2 stops33h 09m

£372

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 28/10

15:30-07:10

1 stop11h 40m

London Heathrow

Tue 4/11

13:25-19:05

2 stops34h 40m

£372

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/3

15:30-07:10

1 stop11h 40m

London Heathrow

Wed 18/3

13:25-13:51

2 stops28h 26m

£372

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 24/11

17:07-05:55

1 stop31h 48m

London Heathrow

Fri 5/12

13:25-14:47

1 stop30h 22m

£375

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 2/12

06:30-11:15

1 stop23h 45m

London Heathrow

Thu 11/12

13:25-14:47

1 stop30h 22m

£375

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 26/1

18:35-06:35

Nonstop7h 00m

London Heathrow

Tue 3/2

13:10-16:15

Nonstop8h 05m

£380

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 30/9

12:47-08:50

2 stops15h 03m

London Heathrow

Wed 15/10

06:15-19:14

2 stops17h 59m

£389

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/10

12:23-08:50

2 stops15h 27m

London Heathrow

Wed 22/10

06:30-17:00

2 stops15h 30m

£390

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 3/11

17:40-13:50

2 stops15h 10m

London Heathrow

Tue 11/11

08:40-19:29

2 stops15h 49m

£410

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 18/11

20:00-06:40

1 stop29h 40m

London Heathrow

Mon 24/11

13:25-14:47

1 stop30h 22m

£412

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 22 results

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia 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 Philadelphia to London Heathrow Airport

Prices

Airlines

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

The best time to book flights from Philadelphia to London Heathrow Airport is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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 PHL to LHR?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 15% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.

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

Reviews of airlines servicing Heathrow

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

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

American Airlines

7.2

Good

10,000 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

JetBlue

7.2

Good

2,912 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Aer Lingus

7.2

Good

1,270 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Iberia

7.0

Good

2,924 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

British Airways

6.7

Okay

7,361 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Jeremy,Sept 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

What airport do you fly from for flights from Philadelphia to London Heathrow?
Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 14 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.
How long is the flight from Philadelphia to London Heathrow Airport?
For as low as £372, United Airlines can have you in London Heathrow Airport from Philadelphia in 10h 40m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi.
What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?
Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £385 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £387 and £421 round-trip. Users have found that British Airways is 36% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Aer Lingus (78%), American Airlines (67%) or Finnair (67%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.
What are the cheapest flights from Philadelphia to London Heathrow Airport?
The cheapest flight price from Philadelphia to London Heathrow Airport is £299. On average you can expect to pay £464. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £347.
Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?
Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.
Can I find deals for business class flights from Philadelphia to Heathrow?
Yes. Cheapflights offers flight deals from Philadelphia to Heathrow 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 Philadelphia to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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

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Top 5 airlines flying from Philadelphia to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£385	Average£545	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£387	Average£766	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
JetBlue	Cheapest£421	Average£572	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Iberia	Cheapest£456	Average£535	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
American Airlines	Cheapest£503	Average£655	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

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

Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow 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 Philadelphia to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Philadelphia? 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 Philadelphia to Heathrow become cheaper?

Yes! Start tracking prices for Philadelphia to Heathrow 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 Philadelphia to London Heathrow Airport from £174

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 14/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 9 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Philadelphia to Heathrow

Cheapest flights from Philadelphia to HeathrowExplore the most affordable flight options available from Philadelphia to Heathrow. 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 Philadelphia to Heathrow. 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 Philadelphia to London Heathrow Airport that are best for you.

Best time to book a flight from Philadelphia to Heathrow

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Weekly flight availability from Philadelphia to London Heathrow Airport

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

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Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with American Airlines, JetBlue, andAer Lingus from Philadelphia to London Heathrow Airport 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 Philadelphia to Heathrow. 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 from for flights from Philadelphia to London Heathrow?

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

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

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

How can I find direct flights from Philadelphia to Heathrow?

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Alternative routes for Philadelphia to Heathrow

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Top 5 airlines flying from Philadelphia to Heathrow

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