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 1h 40m.

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

Boston (BOS) – chosen by Cheapflights users on 73% 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?

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £624.

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: 9h 48m.

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

For as low as £462, Scandinavian Airlines can have you in London Heathrow Airport from Philadelphia in 10h 28m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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 £390 on this airline. Additional options worth looking into are Aer Lingus and Iberia, starting at £391 and £416 round-trip. Users have found that British Airways is 36% cheaper than the other options available to this destination.

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 Monday, which is when the least amount of flights are scheduled (15 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 £384. On average you can expect to pay £737. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £428.

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

Consider Aer Lingus (83%), Iberia (79%) or Finnair (79%) 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 British Airways, Aer Lingus or JetBlue as they are the most popular for this route.

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 15 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.

£189+ 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 £437 and £619 in November. The cheapest return flight price found within the last 3 days was £419 on Air Canada (9 Nov-18 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 Wednesday and return on a Tuesday

Find flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

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 17 October 2025.

Sun 9/1115:30PHL - LHR

2 stops24h 05mAir Canada

Tue 18/1109:00LHR - PHL

2 stops18h 46mAir Canada

Deal found 16/10£419

Mon 1/1215:30PHL - LHR

2 stops24h 05mAir Canada

Tue 9/1209:00LHR - PHL

2 stops18h 46mAir Canada

Deal found 15/10£422

Wed 31/1215:30PHL - LHR

1 stop10h 40mLufthansa

Thu 15/108:30LHR - PHL

1 stop12h 35mLufthansa

Deal found 16/10£428

Wed 31/1215:30PHL - LHR

2 stops22h 05mMultiple Airlines

Thu 15/106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 15/10£429

Wed 19/1115:30PHL - LHR

1 stop10h 40mMultiple Airlines

Wed 26/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 15/10£433

Sun 16/1115:30PHL - LHR

2 stops14h 50mMultiple Airlines

Wed 26/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 15/10£433

Sun 9/1116:35PHL - LHR

1 stop32h 55mMultiple Airlines

Tue 18/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 16/10£435

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 17 October 2025.

Tue 3/206:15PHL - LHR

2 stops22h 05mScandinavian Airlines

Tue 10/207:05LHR - PHL

3 stops19h 12mScandinavian Airlines

Deal found 17/10£450

Sun 23/1115:30PHL - LHR

1 stop10h 40mUnited Airlines

Thu 4/1206:30LHR - PHL

1 stop14h 35mUnited Airlines

Deal found 16/10£459

Wed 3/1217:17PHL - LHR

1 stop10h 28mDelta

Thu 18/1206:30LHR - PHL

2 stops16h 42mDelta

Deal found 14/10£462

Tue 11/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Fri 21/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

Tue 11/1106:00PHL - LHR

1 stop24h 15mUnited Airlines

Fri 21/1113:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 16/10£467

Mon 10/1110:15PHL - LHR

2 stops27h 15mScandinavian Airlines

Mon 17/1106:40LHR - PHL

2 stops19h 56mScandinavian Airlines

Deal found 16/10£469

Mon 5/112:59PHL - LHR

2 stops12h 56mDelta

Tue 13/106:30LHR - PHL

2 stops14h 56mDelta

Deal found 16/10£471

Sun 9/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Fri 21/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

Tue 6/119:45PHL - LHR

1 stop29h 55mUnited Airlines

Tue 13/113:25LHR - PHL

1 stop30h 22mUnited Airlines

Deal found 14/10£469

Wed 12/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Fri 21/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

Mon 10/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Fri 21/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

Mon 10/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Thu 20/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

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 17 October 2025.

Sun 9/1119:45PHL - LHR

Nonstop7h 05mIberia

Tue 18/1110:15LHR - PHL

Nonstop8h 10mIberia

Deal found 16/10£468

Sun 9/1119:45PHL - LHR

Nonstop7h 05mFinnair

Tue 18/1110:15LHR - PHL

Nonstop8h 10mFinnair

Deal found 15/10£468

Tue 11/1119:45PHL - LHR

Nonstop7h 05mBritish Airways

Tue 18/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 15/10£471

Wed 12/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Thu 20/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£472

Sun 9/1119:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Tue 18/1113:10LHR - PHL

Nonstop8h 05mAmerican Airlines

Deal found 16/10£474

Wed 12/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Tue 18/1113:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 16/10£475

Mon 12/118:35PHL - LHR

Nonstop7h 00mFinnair

Wed 21/113:10LHR - PHL

Nonstop8h 05mFinnair

Deal found 16/10£477

Tue 3/218:35PHL - LHR

Nonstop7h 00mAmerican Airlines

Tue 10/210:05LHR - PHL

Nonstop8h 05mAmerican Airlines

Deal found 17/10£478

Wed 28/119:45PHL - LHR

Nonstop7h 05mFinnair

Wed 4/213:10LHR - PHL

Nonstop8h 05mFinnair

Deal found 15/10£479

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

Sun 9/1115:30PHL - LHR

2 stops24h 05mAir Canada

Tue 18/1109:00LHR - PHL

2 stops18h 46mAir Canada

Deal found 16/10£419

Sun 9/1116:35PHL - LHR

1 stop32h 55mMultiple Airlines

Tue 18/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 16/10£435

Wed 12/1115:30PHL - LHR

1 stop10h 40mMultiple Airlines

Tue 18/1109:00LHR - PHL

2 stops17h 21mMultiple Airlines

Deal found 16/10£438

Wed 12/1112:40PHL - LHR

2 stops22h 40mSWISS

Mon 17/1113:45LHR - PHL

2 stops36h 36mSWISS

Deal found 16/10£439

Sat 15/1115:30PHL - LHR

2 stops24h 05mMultiple Airlines

Thu 15/107:30LHR - PHL

1 stop13h 35mMultiple Airlines

Deal found 15/10£440

Sun 16/1115:30PHL - LHR

2 stops14h 50mMultiple Airlines

Wed 26/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 15/10£433

Wed 19/1115:30PHL - LHR

1 stop10h 40mMultiple Airlines

Wed 26/1106:50LHR - PHL

2 stops12h 57mMultiple Airlines

Deal found 15/10£433

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 17 October 2025.

Sat 15/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 15/10£189

Sun 23/1106:00PHL - LHR

2 stops30h 30mMultiple Airlines

Deal found 15/10£191

Sun 9/1106:20PHL - LHR

2 stops34h 15mMultiple Airlines

Deal found 15/10£192

Thu 4/1210:24PHL - LHR

1 stop15h 31mJetBlue

Deal found 15/10£196

Thu 4/1211:07PHL - LHR

2 stops22h 18mMultiple Airlines

Deal found 15/10£199

Sun 16/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 17/10£200

Fri 14/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 16/10£200

Sun 23/1106:00PHL - LHR

2 stops22h 30mJetBlue

Deal found 14/10£202

Sat 25/1019:10PHL - LHR

2 stops37h 40mMultiple Airlines

Deal found 15/10£210

Thu 13/1113:19PHL - LHR

3 stops24h 36mMultiple Airlines

Deal found 15/10£211

Sun 16/1107:15PHL - LHR

2 stops21h 00mMultiple Airlines

Deal found 17/10£211

Cheap flight deals from Philadelphia to Heathrow

Round-trip from	£419
One-way from	£189
Popular in	June
Cheapest in	September
Average price	£513
Good round-trip deal	£548 or less

Air Canada
9/11-18/11
4 total stops
42h 51m total
Philadelphia to London

Search Deals

JetBlue
15/11
1 total stop
19h 55m 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 October 2025

Search Deals

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

Search Deals

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

06:15-09:20

2 stops22h 05m

London Heathrow

Tue 10/2

07:05-21:17

3 stops19h 12m

£450

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 23/11

15:30-07:10

1 stop10h 40m

London Heathrow

Thu 4/12

06:30-16:05

1 stop14h 35m

£459

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/12

17:17-08:45

1 stop10h 28m

London Heathrow

Thu 18/12

06:30-18:12

2 stops16h 42m

£462

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/11

06:00-11:15

1 stop24h 15m

London Heathrow

Fri 21/11

13:25-14:47

1 stop30h 22m

£467

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 10/11

10:15-18:30

2 stops27h 15m

London Heathrow

Mon 17/11

06:40-21:36

2 stops19h 56m

£469

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/1

19:45-06:40

1 stop29h 55m

London Heathrow

Tue 13/1

13:25-14:47

1 stop30h 22m

£469

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 5/1

12:59-06:55

2 stops12h 56m

London Heathrow

Tue 13/1

06:30-16:26

2 stops14h 56m

£471

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/11

18:35-06:35

Nonstop7h 00m

London Heathrow

Fri 21/11

13:10-16:15

Nonstop8h 05m

£472

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 9/11

18:35-06:35

Nonstop7h 00m

London Heathrow

Fri 21/11

13:10-16:15

Nonstop8h 05m

£472

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 12/11

18:35-06:35

Nonstop7h 00m

London Heathrow

Fri 21/11

13:10-16:15

Nonstop8h 05m

£472

Flights are sorted by cheapest return flights first.

Deals found on 17/10

Showing 1-10 of 24 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, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £262). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £430). 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

11,040 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

11,040 reviews

American Airlines

7.2

Good

11,040 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

2,907 reviews

American Airlines

7.2

Good

11,040 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

1,344 reviews

American Airlines

7.2

Good

11,040 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

2,995 reviews

American Airlines

7.2

Good

11,040 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

7,459 reviews

American Airlines

7.2

Good

11,040 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 15 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 £462, Scandinavian Airlines can have you in London Heathrow Airport from Philadelphia in 10h 28m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
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 £390 on this airline. Additional options worth looking into are Aer Lingus and Iberia, starting at £391 and £416 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 (83%), Iberia (79%) or Finnair (79%) 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 £384. On average you can expect to pay £737. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £428.
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, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £262). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £430). 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

Milton Keynes

Croydon

Slough

Gatwick

Hounslow

Northampton

Luton

Wembley

Deal

Ilford

Crawley

Hayes

Watford

Winchester

Swindon

Chichester

Romford

Ipswich

Brentford

Dartford

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Philadelphia to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£390	Average£555	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£391	Average£732	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£416	Average£523	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
JetBlue	Cheapest£426	Average£560	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
American Airlines	Cheapest£509	Average£664	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 £189

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 15/11. 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 Wednesday and return on a Tuesday

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 17 October 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 17 October 2025.

Cheap flight deals from Philadelphia to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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

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

Cheapflights Insights

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

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

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

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

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

Weekly flight availability from Philadelphia to London Heathrow Airport

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

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

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

Which airport typically offers the quickest stopover for flights 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.

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?

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

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

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

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?

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

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

Travelling to a place near London Heathrow Airport?

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.

Alternative routes for Philadelphia to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Philadelphia to Heathrow

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.

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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 17 October 2025.