Cheap flights from Philadelphia to London Heathrow Airport from £286
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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
23 Jul — 30 Jul1
Return
1 adult
Economy
Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 56 days in advance, depart on a Tuesday or Friday and return on a Tuesday
Cheap flight deals from Philadelphia to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 July 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 18 July 2025.
Thu 14/818:35PHL - LHR
Nonstop7h 05mBritish Airways
Tue 23/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 18/7£422
Thu 14/813:40PHL - LHR
1 stop13h 10mIberia
Wed 27/810:05LHR - PHL
Nonstop8h 05mIberia
Deal found 17/7£425
Mon 25/807:30PHL - LHR
2 stops18h 00mAir Canada
Sun 31/809:30LHR - PHL
1 stop17h 37mAir Canada
Deal found 18/7£427
Sun 17/819:26PHL - LHR
1 stop30h 19mDelta
Mon 25/811:30LHR - PHL
2 stops18h 26mDelta
Deal found 16/7£427
Fri 8/809:20PHL - LHR
1 stop16h 10mUnited Airlines
Fri 15/808:30LHR - PHL
1 stop18h 05mUnited Airlines
Deal found 17/7£430
Sat 6/919:50PHL - LHR
Nonstop7h 15mAmerican Airlines
Sat 13/907:35LHR - PHL
1 stop13h 20mAmerican Airlines
Deal found 18/7£444
Sat 13/915:25PHL - LHR
2 stops24h 35mMultiple Airlines
Thu 25/906:50LHR - PHL
2 stops12h 48mMultiple Airlines
Deal found 18/7£448
Sun 31/820:30PHL - LHR
1 stop11h 55mAer Lingus
Sat 6/909:50LHR - PHL
1 stop14h 10mAer Lingus
Deal found 17/7£458
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 18 July 2025.
Thu 14/818:35PHL - LHR
Nonstop7h 05mBritish Airways
Tue 23/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 18/7£422
Thu 14/813:40PHL - LHR
1 stop13h 10mIberia
Wed 27/810:05LHR - PHL
Nonstop8h 05mIberia
Deal found 17/7£425
Mon 25/807:30PHL - LHR
2 stops18h 00mAir Canada
Sun 31/809:30LHR - PHL
1 stop10h 07mAir Canada
Deal found 18/7£427
Sun 17/819:26PHL - LHR
1 stop30h 19mDelta
Mon 25/811:30LHR - PHL
2 stops18h 26mDelta
Deal found 16/7£427
Fri 8/809:20PHL - LHR
1 stop16h 10mUnited Airlines
Fri 15/808:30LHR - PHL
1 stop18h 05mUnited Airlines
Deal found 17/7£430
Sat 13/912:47PHL - LHR
2 stops14h 18mVirgin Atlantic
Tue 23/911:45LHR - PHL
2 stops14h 49mVirgin Atlantic
Deal found 16/7£432
Sat 6/919:50PHL - LHR
Nonstop7h 15mAmerican Airlines
Sat 13/907:35LHR - PHL
1 stop13h 20mAmerican Airlines
Deal found 18/7£444
Sat 13/915:25PHL - LHR
2 stops24h 35mMultiple Airlines
Thu 25/906:50LHR - PHL
2 stops12h 48mMultiple Airlines
Deal found 18/7£448
Sun 31/820:30PHL - LHR
1 stop11h 55mAer Lingus
Sat 6/909:50LHR - PHL
1 stop14h 10mAer Lingus
Deal found 17/7£458
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 18 July 2025.
Thu 14/818:35PHL - LHR
Nonstop7h 05mBritish Airways
Tue 23/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 18/7£422
Tue 29/719:55PHL - LHR
Nonstop7h 10mIberia
Thu 14/812:30LHR - PHL
Nonstop8h 05mIberia
Deal found 17/7£447
Fri 10/1022:20PHL - LHR
Nonstop7h 00mFinnair
Mon 13/1012:30LHR - PHL
Nonstop7h 55mFinnair
Deal found 16/7£458
Thu 4/918:30PHL - LHR
Nonstop7h 10mAmerican Airlines
Sat 13/912:30LHR - PHL
Nonstop8h 00mAmerican Airlines
Deal found 16/7£460
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 18 July 2025 and is based on user searches.
Wed 23/722:25PHL - LHR
Nonstop7h 05mBritish Airways
Wed 30/706:45LHR - PHL
1 stop12h 05mBritish Airways
Deal found 15/7£438
Wed 23/713:25PHL - LHR
2 stops13h 15mDelta
Wed 30/718:15LHR - PHL
1 stop20h 43mDelta
Deal found 15/7£487
Thu 24/710:15PHL - LHR
1 stop15h 15mJetBlue
Sat 26/708:25LHR - PHL
1 stop30h 13mJetBlue
Deal found 18/7£523
Sat 26/719:59PHL - LHR
1 stop29h 56mUnited Airlines
Thu 14/808:30LHR - PHL
1 stop21h 00mUnited Airlines
Deal found 17/7£440
Sat 26/722:25PHL - LHR
Nonstop7h 05mIberia
Mon 1/912:30LHR - PHL
Nonstop8h 05mIberia
Deal found 16/7£455
Sat 26/719:55PHL - LHR
Nonstop7h 10mAmerican Airlines
Thu 14/808:55LHR - PHL
1 stop12h 50mAmerican Airlines
Deal found 17/7£471
Sat 26/712:55PHL - LHR
2 stops12h 25mVirgin Atlantic
Mon 1/909:20LHR - PHL
1 stop20h 36mVirgin Atlantic
Deal found 16/7£474
Thu 7/822:15PHL - LHR
Nonstop7h 05mFinnair
Thu 14/812:30LHR - PHL
Nonstop8h 05mFinnair
Deal found 17/7£422
Sun 10/809:20PHL - LHR
1 stop19h 40mUnited Airlines
Mon 18/814:10LHR - PHL
1 stop15h 20mUnited Airlines
Deal found 18/7£429
Thu 14/818:35PHL - LHR
Nonstop7h 05mBritish Airways
Tue 23/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 18/7£422
Thu 14/813:40PHL - LHR
1 stop13h 10mIberia
Wed 27/810:05LHR - PHL
Nonstop8h 05mIberia
Deal found 17/7£425
Fri 15/813:55PHL - LHR
1 stop12h 00mAmerican Airlines
Sat 30/808:00LHR - PHL
1 stop11h 05mAmerican Airlines
Deal found 18/7£454
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 18 July 2025.
Fri 17/1016:03PHL - LHR
2 stops23h 02mMultiple Airlines
Deal found 16/7£286
Mon 4/809:20PHL - LHR
1 stop19h 40mAir Canada
Deal found 16/7£294
Mon 15/910:20PHL - LHR
1 stop15h 10mJetBlue
Deal found 16/7£295
Tue 9/919:50PHL - LHR
Nonstop7h 15mBritish Airways
Deal found 16/7£297
Wed 23/719:35PHL - LHR
Nonstop7h 20mIberia
Deal found 16/7£306
Sat 9/818:52PHL - LHR
1 stop30h 28mUnited Airlines
Deal found 16/7£307
Wed 23/712:02PHL - LHR
2 stops15h 53mDelta
Deal found 16/7£312
Tue 16/920:30PHL - LHR
1 stop11h 10mAer Lingus
Deal found 16/7£320
Thu 25/910:45PHL - LHR
2 stops17h 35mScandinavian Airlines
Deal found 17/7£336
Fri 1/818:35PHL - LHR
Nonstop7h 05mAmerican Airlines
Deal found 18/7£346
Cheapflights Fare Finder
Customise your flight search to find flights from Philadelphia to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 July 2025.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.
Fly from
Philadelphia
Fly to
Heathrow
Route
Depart
Return
Price
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 14/8
18:35-06:40
Nonstop7h 05m
London Heathrow
Tue 23/9
13:30-16:25
Nonstop7h 55m
£422
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 14/8
13:40-07:50
1 stop13h 10m
London Heathrow
Wed 27/8
10:05-13:10
Nonstop8h 05m
£425
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Mon 25/8
07:30-06:30
2 stops18h 00m
London Heathrow
Sun 31/8
09:30-14:37
1 stop10h 07m
£427
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 17/8
19:26-06:45
1 stop30h 19m
London Heathrow
Mon 25/8
11:30-00:56
2 stops18h 26m
£427
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Fri 8/8
09:20-06:30
1 stop16h 10m
London Heathrow
Fri 15/8
08:30-21:35
1 stop18h 05m
£430
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sat 13/9
12:47-08:05
2 stops14h 18m
London Heathrow
Tue 23/9
11:45-21:34
2 stops14h 49m
£432
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 25/9
19:50-08:05
Nonstop7h 15m
London Heathrow
Sun 5/10
07:55-15:55
1 stop13h 00m
£444
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 31/8
20:30-13:25
1 stop11h 55m
London Heathrow
Sat 6/9
09:50-19:00
1 stop14h 10m
£458
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Fri 17/10
16:03-20:05
2 stops23h 02m
£286
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Mon 4/8
09:20-10:00
1 stop19h 40m
£294
Flights are sorted by cheapest return flights first.
Deals found on 16/7
Showing 1-10 of 18 results
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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
How far ahead should I book a flight from Philadelphia to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Philadelphia to Heathrow. Price data was last updated on 11 July 2025.
The best time to book flights from Philadelphia to London Heathrow Airport is 56 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?
Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2025.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 19% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.
Weekly flight availability from Philadelphia to London Heathrow Airport
Explore weekly flight availability from Philadelphia to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 July 2025.
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).
How much does it cost for a return flight from Philadelphia to London Heathrow Airport?
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 18 July 2025.
Get a feel of what it's like to fly with Delta, United Airlines, andVirgin Atlantic 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.
This trip was fine even with delay I had plenty of time to get connection flight!
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?
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 4 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.
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 £422 on this airline. Additional options worth looking into are Iberia and Air Canada, starting at £425 and £427 round-trip. Users have found that British Airways is 32% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?
The cheapet airlines for a one-way flight from Philadelphia to London Heathrow Airport are Air Canada (£294), JetBlue (£295), and British Airways (£297).
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Aer Lingus (83%), American Airlines (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 £219. On average you can expect to pay £588. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £1.
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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 July 2025.
Top 4 airlines flying from Philadelphia to Heathrow
Discover the top 4 airlines that operate flights from Philadelphia to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 July 2025.
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 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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