Cheap flights from Philadelphia to London Heathrow Airport from £197
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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
27 Dec — 3 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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 Wednesday
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 27 November 2025.
Thu 4/1213:15PHL - LHR
2 stops14h 15mMultiple Airlines
Thu 11/1206:50LHR - PHL
2 stops13h 00mMultiple Airlines
Deal found 26/11£479
Fri 5/1219:51PHL - LHR
Nonstop6h 59mBritish Airways
Wed 10/1213:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 26/11£480
Tue 2/1211:00PHL - LHR
1 stop15h 00mIberia
Sun 7/1219:05LHR - PHL
2 stops30h 04mIberia
Deal found 25/11£482
Tue 2/1210:15PHL - LHR
2 stops15h 55mUnited Airlines
Tue 9/1206:35LHR - PHL
2 stops38h 14mUnited Airlines
Deal found 25/11£483
Tue 9/1215:30PHL - LHR
2 stops24h 05mMultiple Airlines
Tue 16/1208:30LHR - PHL
1 stop12h 35mMultiple Airlines
Deal found 26/11£483
Wed 3/1217:36PHL - LHR
1 stop12h 49mDelta
Mon 8/1208:55LHR - PHL
2 stops17h 42mDelta
Deal found 26/11£484
Fri 5/1215:30PHL - LHR
2 stops24h 05mAir Canada
Thu 11/1206:50LHR - PHL
2 stops13h 00mAir Canada
Deal found 25/11£485
Fri 12/1215:30PHL - LHR
1 stop10h 40mUnited Airlines
Tue 23/1210:25LHR - PHL
1 stop19h 20mUnited Airlines
Deal found 26/11£486
Wed 10/1213:15PHL - LHR
2 stops12h 55mMultiple Airlines
Sun 8/206:50LHR - PHL
2 stops12h 57mMultiple Airlines
Deal found 26/11£486
Tue 30/1219:19PHL - LHR
1 stop30h 06mDelta
Sat 10/109:40LHR - PHL
1 stop15h 20mDelta
Deal found 26/11£489
Thu 4/1214:24PHL - LHR
1 stop11h 01mDelta
Wed 10/1208:55LHR - PHL
1 stop13h 07mDelta
Deal found 26/11£489
Tue 2/1210:33PHL - LHR
1 stop15h 07mUnited Airlines
Fri 12/1213:25LHR - PHL
2 stops36h 45mUnited Airlines
Deal found 25/11£491
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 27 November 2025.
Thu 5/213:30PHL - LHR
1 stop12h 25mJetBlue
Mon 9/209:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 24/11£480
Sun 11/106:02PHL - LHR
2 stops22h 18mScandinavian Airlines
Wed 14/121:05LHR - PHL
3 stops29h 11mScandinavian Airlines
Deal found 23/11£480
Thu 26/218:35PHL - LHR
Nonstop7h 00mBritish Airways
Fri 6/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/11£483
Thu 26/214:31PHL - LHR
1 stop10h 54mDelta
Wed 11/308:55LHR - PHL
1 stop13h 25mDelta
Deal found 25/11£495
Fri 27/218:35PHL - LHR
Nonstop7h 00mBritish Airways
Thu 5/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/11£483
Tue 28/410:35PHL - LHR
2 stops17h 45mScandinavian Airlines
Thu 7/506:40LHR - PHL
2 stops22h 45mScandinavian Airlines
Deal found 24/11£486
Mon 23/215:02PHL - LHR
1 stop10h 53mJetBlue
Thu 26/209:20LHR - PHL
1 stop18h 25mJetBlue
Deal found 23/11£492
Thu 26/217:17PHL - LHR
1 stop10h 28mDelta
Tue 10/313:05LHR - PHL
1 stop12h 18mDelta
Deal found 25/11£495
Fri 27/218:35PHL - LHR
Nonstop7h 00mBritish Airways
Fri 6/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/11£483
Sat 2/510:35PHL - LHR
3 stops24h 50mScandinavian Airlines
Thu 7/506:40LHR - PHL
2 stops22h 45mScandinavian Airlines
Deal found 23/11£489
Fri 10/417:22PHL - LHR
2 stops12h 48mDelta
Fri 24/410:55LHR - PHL
2 stops17h 05mDelta
Deal found 25/11£510
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 27 November 2025.
Wed 10/1219:51PHL - LHR
Nonstop6h 59mFinnair
Sun 8/210:15LHR - PHL
Nonstop8h 15mFinnair
Deal found 26/11£479
Wed 7/118:35PHL - LHR
Nonstop7h 00mBritish Airways
Fri 16/110:15LHR - PHL
Nonstop8h 15mBritish Airways
Deal found 25/11£483
Thu 26/218:35PHL - LHR
Nonstop7h 00mBritish Airways
Thu 5/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/11£483
Thu 16/422:20PHL - LHR
Nonstop7h 00mBritish Airways
Fri 24/409:15LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 26/11£484
Thu 2/419:40PHL - LHR
Nonstop7h 10mIberia
Tue 7/409:15LHR - PHL
Nonstop8h 00mIberia
Deal found 25/11£485
Mon 27/418:45PHL - LHR
Nonstop7h 05mBritish Airways
Sat 9/513:45LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 26/11£495
Thu 11/1219:51PHL - LHR
Nonstop6h 59mBritish Airways
Sun 14/1210:05LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 25/11£505
Fri 20/320:45PHL - LHR
Nonstop7h 05mBritish Airways
Mon 30/312:30LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 26/11£510
Wed 13/518:45PHL - LHR
Nonstop7h 05mBritish Airways
Wed 27/512:30LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 25/11£514
Thu 26/218:35PHL - LHR
Nonstop7h 00mBritish Airways
Mon 9/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/11£521
Sat 10/118:35PHL - LHR
Nonstop7h 00mAmerican Airlines
Sat 17/110:15LHR - PHL
Nonstop8h 15mAmerican Airlines
Deal found 26/11£523
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 27 November 2025 and is based on user searches.
Tue 2/1211:00PHL - LHR
1 stop15h 00mIberia
Sun 7/1219:05LHR - PHL
2 stops30h 04mIberia
Deal found 25/11£482
Tue 2/1210:15PHL - LHR
2 stops15h 55mUnited Airlines
Tue 9/1206:35LHR - PHL
2 stops38h 14mUnited Airlines
Deal found 25/11£483
Tue 2/1210:33PHL - LHR
1 stop15h 07mUnited Airlines
Fri 12/1213:25LHR - PHL
2 stops36h 45mUnited Airlines
Deal found 25/11£491
Wed 3/1217:36PHL - LHR
1 stop12h 49mDelta
Mon 8/1208:55LHR - PHL
2 stops17h 42mDelta
Deal found 26/11£484
Thu 4/1214:24PHL - LHR
1 stop11h 01mDelta
Fri 12/1209:40LHR - PHL
1 stop12h 16mDelta
Deal found 26/11£489
Fri 5/1219:51PHL - LHR
Nonstop6h 59mBritish Airways
Wed 10/1213:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 26/11£480
Fri 5/1215:30PHL - LHR
2 stops24h 05mAir Canada
Thu 11/1206:50LHR - PHL
2 stops13h 00mAir Canada
Deal found 25/11£485
Tue 9/1215:30PHL - LHR
2 stops24h 05mMultiple Airlines
Tue 16/1208:30LHR - PHL
1 stop12h 35mMultiple Airlines
Deal found 26/11£483
Wed 10/1219:51PHL - LHR
Nonstop6h 59mFinnair
Sun 8/210:15LHR - PHL
Nonstop8h 15mFinnair
Deal found 26/11£479
Wed 10/1213:15PHL - LHR
2 stops12h 55mMultiple Airlines
Sun 8/206:50LHR - PHL
2 stops12h 57mMultiple Airlines
Deal found 26/11£486
Tue 30/1219:19PHL - LHR
1 stop30h 06mDelta
Sun 11/113:05LHR - PHL
1 stop13h 11mDelta
Deal found 26/11£489
Wed 31/1211:40PHL - LHR
1 stop14h 25mDelta
Sun 11/108:55LHR - PHL
2 stops19h 18mDelta
Deal found 26/11£492
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 27 November 2025.
Thu 26/205:30PHL - LHR
2 stops26h 20mMultiple Airlines
Deal found 26/11£197
Sun 25/122:45PHL - LHR
3 stops40h 20mMultiple Airlines
Deal found 26/11£201
Tue 20/120:25PHL - LHR
3 stops42h 40mMultiple Airlines
Deal found 23/11£204
Sat 24/119:40PHL - LHR
3 stops43h 25mMultiple Airlines
Deal found 26/11£205
Mon 12/120:43PHL - LHR
3 stops42h 22mMultiple Airlines
Deal found 24/11£206
Wed 28/120:43PHL - LHR
3 stops42h 22mMultiple Airlines
Deal found 26/11£207
Mon 8/1222:00PHL - LHR
3 stops29h 30mMultiple Airlines
Deal found 24/11£211
Tue 9/1205:15PHL - LHR
3 stops24h 35mMultiple Airlines
Deal found 23/11£213
Tue 2/1218:22PHL - LHR
3 stops57h 08mMultiple Airlines
Deal found 24/11£214
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 27 November 2025.
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 27 November 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 5/2
13:30-06:55
1 stop12h 25m
London Heathrow
Mon 9/2
09:20-18:23
1 stop14h 03m
£480
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 11/1
06:02-09:20
2 stops22h 18m
London Heathrow
Wed 14/1
21:05-21:16
3 stops29h 11m
£480
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 26/2
18:35-06:35
Nonstop7h 00m
London Heathrow
Fri 6/3
13:10-16:15
Nonstop8h 05m
£483
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Fri 27/2
18:35-06:35
Nonstop7h 00m
London Heathrow
Thu 5/3
13:10-16:15
Nonstop8h 05m
£483
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Fri 27/2
18:35-06:35
Nonstop7h 00m
London Heathrow
Fri 6/3
13:10-16:15
Nonstop8h 05m
£483
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Tue 28/4
10:35-09:20
2 stops17h 45m
London Heathrow
Thu 7/5
06:40-00:25
2 stops22h 45m
£486
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sat 2/5
10:35-16:25
3 stops24h 50m
London Heathrow
Thu 7/5
06:40-00:25
2 stops22h 45m
£489
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Mon 23/2
15:02-06:55
1 stop10h 53m
London Heathrow
Thu 26/2
09:20-22:45
1 stop18h 25m
£492
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 26/2
14:31-06:25
1 stop10h 54m
London Heathrow
Wed 11/3
08:55-18:20
1 stop13h 25m
£495
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 26/2
17:17-08:45
1 stop10h 28m
London Heathrow
Tue 10/3
13:05-21:23
1 stop12h 18m
£495
Flights are sorted by cheapest return flights first.
Deals found on 26/11
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
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 21 November 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, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £267). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £437). 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 27 November 2025.
Unlike in the morning, when flights are generally more expensive, you can save up to 11% 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 27 November 2025.
The most flights from PHL to LHR are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, 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 74% 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?
Average return fare for one-stop flights from Philadelphia to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £515.
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: 9h 48m.
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 1h 41m.
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 27 November 2025.
Get a feel of what it's like to fly with American Airlines, Aer Lingus, andJetBlue 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.
The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
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 10 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 £483, JetBlue can have you in London Heathrow Airport from Philadelphia in 7h. 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 £391 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £398 and £434 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 Malaysia Airlines (84%), American Airlines (83%) or Iberia (83%) 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 £331. On average you can expect to pay £1,132. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £414.
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 £267). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £437). 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 27 November 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 27 November 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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