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.
PHL — LHR
16 Oct — 23 Oct1
Return
1 adult
Economy
Return
1 adult, Economy
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
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 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.
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
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 16 September 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
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
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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
Prices
Airlines
More
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 12 September 2025.
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?
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 16 September 2025.
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?
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 16 September 2025.
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).
What’s the top stopover airport for flights from Philadelphia to London Heathrow Airport?
Share of one-stop return flights from Philadelphia to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Boston (BOS) – chosen by Cheapflights users on 64% of one-stop itineraries from Philadelphia to London Heathrow Airport on Cheapflights.
What’s the fastest stopover option from Philadelphia to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Philadelphia to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 07m.
What’s the fastest stopover option from Philadelphia to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Philadelphia to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover 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?
Average stopover duration for one-stop one-way flights from Philadelphia to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 2h 00m.
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 16 September 2025.
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.
Terrible. Bad customer service and unacceptable delay on the tarmac
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 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 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 16 September 2025.
Top 5 airlines flying from Philadelphia to Heathrow
Discover the top 5 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 16 September 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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