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$262+ Cheap flights from Philadelphia (PHL) to London (LON)

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
Sep 8 — Sep 151
Tue 9/8
Tue 9/15
1 adult, Economy
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Find cheap flights from Philadelphia to London with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Philadelphia to London are usually found in November or September, booked 54 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Philadelphia to London

Cheapest flights from Philadelphia to London
Explore the most affordable flight options available from Philadelphia to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 9, 2026.

This Ovago deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:40 pm -
1 stop15h 45m
Sun 11/155:15 pm -
1 stop21h 17m
Deal found 8/4$846
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:41 pm -
2 stops35h 19m
Sat 8/292:00 pm -
1 stop14h 59m
Deal found 8/3$847
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:36 pm -
2 stops59h 24m
Mon 8/242:00 pm -
1 stop14h 59m
Deal found 8/5$848
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:25 pm -
1 stop18h 05m
Thu 9/1712:00 pm -
1 stop11h 55m
Deal found 8/4$849
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:25 pm -
1 stop13h 35m
Mon 10/196:10 pm -
2 stops29h 45m
Deal found 8/5$850
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/31:00 pm -
1 stop16h 00m
Sun 9/62:00 pm -
1 stop14h 59m
Deal found 8/4$851
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:25 pm -
1 stop18h 05m
Tue 9/158:30 am -
1 stop15h 25m
Deal found 8/4$853
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:25 pm -
1 stop13h 35m
Wed 10/212:00 pm -
1 stop15h 20m
Deal found 8/4$853
This Norse deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:01 pm -
1 stop30h 59m
Sun 8/302:00 pm -
1 stop24h 35m
Deal found 8/4$855
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:25 pm -
1 stop15h 40m
Thu 9/178:40 am -
1 stop15h 15m
Deal found 8/4$856
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:50 pm -
1 stop14h 10m
Thu 10/152:00 pm -
1 stop15h 20m
Deal found 8/4$857
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:45 am -
1 stop21h 15m
Tue 11/179:30 am -
1 stop11h 35m
Deal found 8/4$858

Find flight deals from Philadelphia to London

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to London (LON). 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 August 9, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$846
(Ovago)

One-way from

$262
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$932

Good round-trip deal

$1,047 or less

Good one-way deal

$462 or less
Provider with most accurate pricing for Philadelphia-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-London (LON) flights.
Search Deals
From Philadelphia to London (LON)
Search Deals
One-way flight from Philadelphia to London (LON)
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($347 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Philadelphia to London (LON).
Search Deals
Price to beat on a one-way flight from Philadelphia to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to London 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 2,558,603 searches. Data last updated August 9, 2026.
Use the filters below to find and compare flights from Philadelphia to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Wed 9/9

8:25 pm-7:30 pm

1 stop18h 05m

London Stansted

Thu 9/17

12:00 pm-6:55 pm

1 stop11h 55m

$849
Quickest round-trip

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Sun 11/1

5:30 pm-7:50 am

1 stop9h 20m

London Stansted

Fri 11/13

9:40 am-5:40 pm

1 stop13h 00m

$853

PhiladelphiaLondon

PHL Philadelphia - LTN London Luton

PHLLTN

Philadelphia

Mon 10/12

4:20 pm-2:05 pm

2 stops16h 45m

London Luton

Thu 10/15

6:15 pm-9:32 pm

3 stops32h 17m

$870

PhiladelphiaLondon

PHL Philadelphia - LTN London Luton

PHLLTN

Philadelphia

Sun 11/1

5:30 pm-3:10 pm

1 stop16h 40m

London Luton

Sun 11/15

8:45 am-4:00 pm

1 stop12h 15m

$885

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 10/15

10:45 am-6:30 am

1 stop14h 45m

London Heathrow

Wed 10/21

8:40 am-5:59 pm

1 stop14h 19m

$896

PhiladelphiaLondon

PHL Philadelphia - LGW London Gatwick

PHLLGW

Philadelphia

Fri 9/18

5:15 am-10:00 am

1 stop23h 45m

London Gatwick

Mon 9/21

2:00 pm-9:30 am

1 stop24h 30m

$910

PhiladelphiaLondon

PHL Philadelphia - LGW London Gatwick

PHLLGW

Philadelphia

Thu 8/13

6:18 pm-10:00 am

1 stop34h 42m

London Gatwick

Mon 8/24

2:00 pm-11:59 pm

1 stop14h 59m

$941

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 8/30

9:12 am-6:30 am

1 stop16h 18m

London Heathrow

Thu 9/17

8:40 am-5:48 pm

1 stop14h 08m

$960

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 10/6

10:42 am-10:20 am

2 stops18h 38m

London Heathrow

Tue 10/13

7:50 pm-9:50 am

3 stops43h 00m

$991

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Mon 9/28

3:57 pm-10:00 pm

3 stops25h 03m

London Heathrow

Thu 10/8

11:20 am-9:50 am

2 stops27h 30m

$993

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Philadelphia to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to London in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-London flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Philadelphia-London flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Philadelphia-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-London flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to London

Have a flexible travel schedule? Discover the best time to fly to London from Philadelphia with our price prediction graph.
Estimated round-trip 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

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

Currently, January is the cheapest month in which you can book a flight from Philadelphia to London (average of $722). Flying from Philadelphia to London in June is currently the most expensive (average of $1,482). 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 LON?

Find hourly flight availability from Philadelphia to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 9, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to London as you normally would.

Weekly flight availability from Philadelphia to London

Explore weekly flight availability from Philadelphia to London. 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 August 9, 2026.

The most flights from PHL to LON are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 on average).

How much does it cost to fly round-trip from Philadelphia to London?

Airfare is typical for this route at the moment.
Philadelphia to London flights typically cost between $667 and $1,099 in November.
The cheapest round-trip price found within the last 5 days was $846 on British Airways (Nov 11-Nov 15).

What’s the top layover airport for flights from Philadelphia to London?

Share of 1-stop round-trip flights from Philadelphia to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dublin (DUB) – chosen by Cheapflights users on 90% of 1-stop itineraries from Philadelphia to London on Cheapflights.

What’s the cheapest layover airport for flights from Philadelphia to London?

Average round-trip fare for 1-stop flights from Philadelphia to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $784.

What’s the fastest layover option from Philadelphia to London?

Shortest average travel time for 1-stop one-way flights from Philadelphia to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 9h 35m.

Which airport typically offers the quickest layover for flights from Philadelphia to London?

Average layover duration for 1-stop one-way flights from Philadelphia to London, 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 layover time of 1h 58m.

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

Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

The best insider tips for Philadelphia to London flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to London trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated August 9, 2026.
See what other customers who have flown with Finnair,Aer Lingus, andAmerican Airlines from Philadelphia to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Finnair
7.7
Good
1,428 reviews
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Aer Lingus
7.3
Good
1,691 reviews
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
American Airlines
7.1
Good
11,893 reviews
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Iberia
7.0
Good
3,263 reviews
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
British Airways
6.7
Okay
8,151 reviews
Finnair
7.7
Good
1,428 reviews

Crew

8.2

Overall

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to London. 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?

    If you book a flight to London from Philadelphia, you will be flying from Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 12 flights from Philadelphia to London per day from 6 different airlines.

  • How long is the flight from Philadelphia to London?

    Airlines like JetBlue, TAP AIR PORTUGAL, and Delta fly from Philadelphia to London in about 14h 45m. The time it takes to get you to your destination can typically vary by up to 3h 53m. The distance from Philadelphia to London is about 3533 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Flying on British Airways is currently your cheapest option to London, with prices starting at $499. Additional round-trip tickets that might be worth considering are offered by American Airlines and Finnair, with the lowest prices starting at $503 and $513, respectively. These flights start at 44% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to London one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $174. Users have also found prices from $198 and $374 on TAP AIR PORTUGAL and American Airlines, respectively.

  • What are the most popular routes from Philadelphia to London?

    Most travelers choose Philadelphia - London Heathrow, Philadelphia - London Gatwick or Philadelphia - London City when deciding on the best route from Philadelphia to London.

  • What are the most reliable airlines from Philadelphia to London?

    The top 3 most reliable airlines when flying from Philadelphia to London are Malaysia Airlines (73%), American Airlines (73%) and Finnair (73%).

  • What are the cheapest flights from Philadelphia to London?

    On average you can expect to pay $2,631 for a flight from Philadelphia to London. The cheapest flight overall is $344 while the most popular route, (Philadelphia - London Heathrow) is currently priced at $755.

  • Can I find deals for flights from Philadelphia to London that include hotel bookings?

    Yes. In addition to deals on Philadelphia to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to London.

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

    Yes. Cheapflights offers flight deals from Philadelphia to London 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?

    Currently, January is the cheapest month in which you can book a flight from Philadelphia to London (average of $722). Flying from Philadelphia to London in June is currently the most expensive (average of $1,482). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
Harlow

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Philadelphia to London

Discover the top 6 airlines that operate flights from Philadelphia to London. 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 2,558,603 searches. Data last updated August 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$499Average$896FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$503Average$939FlexibilityNo cancel feeOn-time71%
FinnairCheapest$513Average$943FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$522Average$840FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$567Average$1,022FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$640Average$753FlexibilityNo cancel feeOn-time62%

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