Cheap flights from Philadelphia to London Heathrow Airport from £175
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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
3 Sep — 10 Sep1
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 29 August 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 29 August 2025.
Wed 10/1217:30PHL - LHR
1 stop10h 35mAer Lingus
Tue 16/1209:50LHR - PHL
1 stop11h 10mAer Lingus
Deal found 28/8£367
Wed 8/1020:30PHL - LHR
1 stop9h 40mAer Lingus
Thu 30/1008:50LHR - PHL
1 stop12h 10mAer Lingus
Deal found 26/8£369
Wed 22/1022:15PHL - LHR
Nonstop7h 05mBritish Airways
Tue 4/1110:15LHR - PHL
Nonstop8h 10mBritish Airways
Deal found 28/8£381
Mon 29/919:50PHL - LHR
Nonstop7h 15mBritish Airways
Tue 14/1008:55LHR - PHL
1 stop13h 58mBritish Airways
Deal found 27/8£389
Wed 8/1020:30PHL - LHR
1 stop9h 40mAer Lingus
Mon 13/1013:25LHR - PHL
1 stop10h 35mAer Lingus
Deal found 27/8£398
Mon 3/1118:35PHL - LHR
Nonstop7h 00mIberia
Sun 9/1113:10LHR - PHL
Nonstop8h 05mIberia
Deal found 28/8£418
Sun 26/1020:45PHL - LHR
Nonstop7h 05mIberia
Sun 2/1110:05LHR - PHL
Nonstop8h 05mIberia
Deal found 27/8£419
Thu 16/1016:00PHL - LHR
1 stop10h 50mBritish Airways
Wed 22/1013:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 27/8£422
Wed 5/1114:58PHL - LHR
1 stop13h 17mBritish Airways
Mon 10/1113:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 27/8£423
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 29 August 2025.
Sun 25/119:45PHL - LHR
Nonstop7h 05mBritish Airways
Sun 1/210:05LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 28/8£418
Sun 25/118:35PHL - LHR
1 stop10h 50mIberia
Sun 1/210:05LHR - PHL
Nonstop8h 05mIberia
Deal found 28/8£421
Tue 6/113:30PHL - LHR
1 stop12h 25mJetBlue
Tue 13/109:20LHR - PHL
1 stop17h 04mJetBlue
Deal found 27/8£474
Thu 30/1019:35PHL - LHR
Nonstop7h 00mIberia
Mon 3/1110:05LHR - PHL
Nonstop8h 05mIberia
Deal found 28/8£455
Thu 30/1019:10PHL - LHR
1 stop10h 05mBritish Airways
Mon 3/1113:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 28/8£458
Wed 26/1116:46PHL - LHR
1 stop9h 09mJetBlue
Wed 3/1209:20LHR - PHL
1 stop12h 17mJetBlue
Deal found 27/8£474
Sun 28/910:20PHL - LHR
1 stop15h 10mJetBlue
Wed 8/1008:25LHR - PHL
1 stop18h 30mJetBlue
Deal found 28/8£474
Wed 7/113:30PHL - LHR
1 stop12h 25mJetBlue
Tue 13/109:20LHR - PHL
1 stop17h 04mJetBlue
Deal found 27/8£474
Tue 7/1015:31PHL - LHR
1 stop9h 59mJetBlue
Tue 21/1008:25LHR - PHL
1 stop18h 30mJetBlue
Deal found 27/8£474
Wed 15/1015:31PHL - LHR
1 stop9h 59mJetBlue
Wed 22/1008:25LHR - PHL
1 stop18h 30mJetBlue
Deal found 27/8£474
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 29 August 2025.
Mon 22/918:30PHL - LHR
Nonstop7h 10mBritish Airways
Wed 8/1012:30LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 25/8£380
Wed 8/1019:50PHL - LHR
Nonstop7h 05mIberia
Wed 22/1012:30LHR - PHL
Nonstop8h 05mIberia
Deal found 27/8£381
Sun 21/922:15PHL - LHR
Nonstop7h 05mIberia
Wed 8/1010:05LHR - PHL
Nonstop8h 00mIberia
Deal found 25/8£382
Mon 29/918:30PHL - LHR
Nonstop7h 10mBritish Airways
Thu 9/1012:30LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 26/8£392
Wed 22/1022:15PHL - LHR
Nonstop7h 05mBritish Airways
Tue 4/1110:15LHR - PHL
Nonstop8h 10mBritish Airways
Deal found 26/8£393
Tue 7/1020:00PHL - LHR
Nonstop7h 05mBritish Airways
Tue 21/1010:05LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 26/8£395
Wed 24/922:15PHL - LHR
Nonstop7h 05mBritish Airways
Sat 11/1010:05LHR - PHL
Nonstop8h 00mBritish Airways
Deal found 25/8£417
Mon 3/1118:35PHL - LHR
Nonstop7h 00mIberia
Sun 9/1113:10LHR - PHL
Nonstop8h 05mIberia
Deal found 28/8£418
Mon 22/919:50PHL - LHR
Nonstop7h 15mIberia
Sat 11/1010:05LHR - PHL
Nonstop8h 00mIberia
Deal found 25/8£419
Fri 10/1020:00PHL - LHR
Nonstop7h 05mFinnair
Fri 17/1012:30LHR - PHL
Nonstop8h 05mFinnair
Deal found 25/8£421
Wed 10/922:15PHL - LHR
Nonstop7h 05mBritish Airways
Mon 15/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 26/8£432
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 29 August 2025 and is based on user searches.
Tue 2/910:15PHL - LHR
1 stop15h 15mJetBlue
Wed 10/908:25LHR - PHL
1 stop11h 35mJetBlue
Deal found 28/8£518
Tue 2/917:50PHL - LHR
1 stop31h 40mJetBlue
Tue 9/908:25LHR - PHL
1 stop13h 50mJetBlue
Deal found 27/8£551
Tue 2/910:15PHL - LHR
1 stop15h 15mJetBlue
Mon 8/908:25LHR - PHL
1 stop13h 50mJetBlue
Deal found 26/8£562
Wed 3/910:25PHL - LHR
1 stop15h 05mJetBlue
Wed 10/908:25LHR - PHL
1 stop29h 57mJetBlue
Deal found 27/8£539
Wed 3/915:10PHL - LHR
2 stops13h 20mJetBlue
Sat 6/908:25LHR - PHL
1 stop11h 35mJetBlue
Deal found 27/8£564
Thu 4/910:20PHL - LHR
1 stop15h 10mJetBlue
Fri 12/908:25LHR - PHL
1 stop18h 25mJetBlue
Deal found 26/8£541
Fri 5/910:10PHL - LHR
1 stop15h 20mJetBlue
Thu 11/908:25LHR - PHL
1 stop11h 35mJetBlue
Deal found 27/8£576
Sun 7/907:00PHL - LHR
1 stop18h 30mJetBlue
Fri 12/908:25LHR - PHL
1 stop13h 50mJetBlue
Deal found 28/8£486
Sun 7/907:00PHL - LHR
1 stop18h 30mJetBlue
Wed 10/908:25LHR - PHL
1 stop18h 25mJetBlue
Deal found 28/8£504
Sun 7/907:00PHL - LHR
1 stop18h 30mJetBlue
Sun 14/908:25LHR - PHL
1 stop11h 35mJetBlue
Deal found 28/8£526
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 29 August 2025.
Fri 26/917:10PHL - LHR
2 stops19h 35mMultiple Airlines
Deal found 28/8£175
Fri 3/1016:03PHL - LHR
2 stops24h 57mMultiple Airlines
Deal found 26/8£175
Sun 28/916:03PHL - LHR
2 stops24h 57mMultiple Airlines
Deal found 28/8£180
Mon 27/1005:30PHL - LHR
2 stops27h 10mMultiple Airlines
Deal found 27/8£181
Fri 24/1017:05PHL - LHR
2 stops19h 40mMultiple Airlines
Deal found 28/8£182
Thu 2/1016:03PHL - LHR
2 stops37h 17mMultiple Airlines
Deal found 28/8£186
Mon 24/1121:11PHL - LHR
2 stops34h 29mMultiple Airlines
Deal found 27/8£189
Mon 13/1013:23PHL - LHR
2 stops39h 57mMultiple Airlines
Deal found 28/8£193
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 29 August 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
Sun 25/1
19:45-07:50
Nonstop7h 05m
London Heathrow
Sun 1/2
10:05-13:10
Nonstop8h 05m
£418
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 25/1
18:35-10:25
1 stop10h 50m
London Heathrow
Sun 1/2
10:05-13:10
Nonstop8h 05m
£421
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 30/10
19:35-06:35
Nonstop7h 00m
London Heathrow
Mon 3/11
10:05-13:10
Nonstop8h 05m
£455
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Thu 30/10
19:10-09:15
1 stop10h 05m
London Heathrow
Mon 3/11
13:10-16:15
Nonstop8h 05m
£458
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Tue 6/1
13:30-06:55
1 stop12h 25m
London Heathrow
Tue 13/1
09:20-21:24
1 stop17h 04m
£474
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 26/11
16:46-06:55
1 stop9h 09m
London Heathrow
Wed 3/12
09:20-16:37
1 stop12h 17m
£474
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 28/9
10:20-06:30
1 stop15h 10m
London Heathrow
Wed 8/10
08:25-21:55
1 stop18h 30m
£474
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 7/1
13:30-06:55
1 stop12h 25m
London Heathrow
Tue 13/1
09:20-21:24
1 stop17h 04m
£474
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Tue 7/10
15:31-06:30
1 stop9h 59m
London Heathrow
Tue 21/10
08:25-21:55
1 stop18h 30m
£474
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 15/10
15:31-06:30
1 stop9h 59m
London Heathrow
Wed 22/10
08:25-21:55
1 stop18h 30m
£474
Flights are sorted by cheapest return flights first.
Deals found on 28/8
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 22 August 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 29 August 2025.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% 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 29 August 2025.
The most flights from PHL to LHR are scheduled on a Thursday (15 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 60% 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 03m.
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 03m.
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 54m.
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 29 August 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.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
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 12 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 £418, British Airways can have you in London Heathrow Airport from Philadelphia in 7h 05m. 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 JetBlue. Our recent data shows that you can find tickets from as low as £424 on this airline. Additional options worth looking into are British Airways and Iberia, starting at £441 and £459 round-trip. Users have found that JetBlue is 30% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Aer Lingus (80%), 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 £292. On average you can expect to pay £388. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £380.
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 29 August 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 29 August 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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