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$160+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to London are usually found in February or October, booked 88 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap 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 September 11, 2025.

Round-trip from

$492
(Gotogate)

One-way from

$160
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$680

Good round-trip deal

$613 or less

Good one-way deal

$487 or less
From Philadelphia to London (LON)
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One-way flight from Philadelphia to London (LON)
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Highest demand for flights based on searches. 19% potential increase in price ($189 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Philadelphia to London (LON).
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Price to beat on a one-way flight from Philadelphia to London (LON).
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Find 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 September 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/43:30 pmPHL - LHR
2 stops14h 50mMultiple Airlines
Fri 11/146:50 amLHR - PHL
2 stops12h 57mMultiple Airlines
Deal found 9/10$492
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/73:30 pmPHL - LHR
1 stop10h 40mAir Canada
Sun 11/96:50 amLHR - PHL
2 stops12h 57mAir Canada
Deal found 9/10$493
This Norse deal was found by Cheapflights users on 9/8. 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.
Sat 9/278:43 pmPHL - LGW
1 stop32h 27mMultiple Airlines
Thu 10/22:00 pmLGW - PHL
1 stop28h 02mMultiple Airlines
Deal found 9/8$493
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:45 pmPHL - LHR
Nonstop7h 05mAmerican Airlines
Tue 11/188:15 amLHR - PHL
1 stop12h 35mAmerican Airlines
Deal found 9/11$494
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:25 pmPHL - LHR
1 stop10h 05mAir Canada
Fri 10/316:00 pmLHR - PHL
2 stops24h 47mAir Canada
Deal found 9/11$495
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:35 pmPHL - LHR
Nonstop7h 00mAmerican Airlines
Fri 11/78:25 amLHR - PHL
1 stop12h 15mAmerican Airlines
Deal found 9/10$496
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:45 pmPHL - LHR
Nonstop7h 05mAmerican Airlines
Thu 11/208:25 amLHR - PHL
1 stop12h 15mAmerican Airlines
Deal found 9/11$497
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:45 pmPHL - LHR
1 stop10h 20mAmerican Airlines
Thu 10/98:55 amLHR - PHL
1 stop12h 55mAmerican Airlines
Deal found 9/10$498
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Mon 10/135:20 amPHL - LGW
1 stop23h 40mMultiple Airlines
Wed 10/221:00 pmLGW - PHL
2 stops26h 11mMultiple Airlines
Deal found 9/11$498
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/73:30 pmPHL - LHR
2 stops14h 50mMultiple Airlines
Sun 11/96:50 amLHR - PHL
2 stops12h 57mMultiple Airlines
Deal found 9/10$499
This Flightnetwork deal was found by Cheapflights users on 9/11. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/224:50 pmPHL - LHR
1 stop12h 10mAir Canada
Wed 10/19:30 amLHR - PHL
1 stop17h 08mAir Canada
Deal found 9/11$500
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2410:15 pmPHL - LHR
Nonstop7h 05mAmerican Airlines
Wed 10/17:55 amLHR - PHL
1 stop11h 00mAmerican Airlines
Deal found 9/11$501

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 September 11, 2025.
Use the filters below to find and compare flights from Philadelphia to London that are best for you.

Fly from

Philadelphia

Fly to

London

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 12/31

6:00 am-10:50 am

1 stop23h 50m

London Heathrow

Wed 1/14

1:25 pm-2:47 pm

1 stop30h 22m

$509

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 11/22

8:00 pm-6:40 am

1 stop29h 40m

London Heathrow

Wed 12/3

11:10 am-3:49 pm

1 stop33h 39m

$516

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 3/9

7:35 pm-6:35 am

Nonstop7h 00m

London Heathrow

Fri 3/20

1:10 pm-5:15 pm

Nonstop8h 05m

$517

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/15

3:25 pm-9:35 am

1 stop13h 10m

London Heathrow

Wed 10/22

2:05 pm-9:38 pm

1 stop12h 33m

$517

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 3/9

3:30 pm-7:10 am

1 stop11h 40m

London Heathrow

Thu 3/19

1:25 pm-2:47 pm

1 stop29h 22m

$517

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 11/8

6:18 pm-6:25 am

1 stop31h 07m

London Heathrow

Wed 11/19

6:20 am-9:38 pm

2 stops20h 18m

$524

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 1/4

3:30 pm-7:10 am

1 stop10h 40m

London Heathrow

Tue 1/13

9:00 am-10:56 pm

2 stops18h 56m

$524

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 10/24

4:50 pm-9:35 pm

2 stops47h 45m

London Heathrow

Mon 11/24

4:40 pm-10:56 pm

2 stops35h 16m

$525

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/29

12:23 pm-9:00 am

2 stops16h 37m

London Heathrow

Fri 11/7

8:55 am-9:32 pm

2 stops17h 37m

$529

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 1/14

5:20 pm-8:45 am

1 stop10h 25m

London Heathrow

Fri 1/30

9:40 am-5:16 pm

1 stop12h 36m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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The best insider tips for Philadelphia to London flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to London trip
Airports
PHL

For quick access to Center City, SEPTA's Airport Line is efficient and operates from 5:00 a.m. to midnight.

Read more about PHLby Mark Chesnut
LHR

Take the Heathrow Express to Paddington for the fastest route into central London.

Read more about LHRby Ramsey Qubein
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

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

Ramsey Qubein

Ramsey Qubein

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to London. Price data was last updated on August 29, 2025.

Booking 88 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.

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

Currently, November is the cheapest month in which you can book a flight from Philadelphia to London (average of $661). Flying from Philadelphia to London in June is currently the most expensive (average of $1,098). 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 September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to London at noon. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Philadelphia to London?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to London. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to London flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 11, 2025.

The most flights from PHL to LON 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 to fly round-trip from Philadelphia to London?

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 September 11, 2025.
See what other customers who have flown with Finnair, American Airlines, and JetBlue 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
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,323 reviews
Finnair
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
JetBlue
7.2
Good
2,913 reviews
Finnair
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Iberia
7.0
Good
2,929 reviews
Finnair
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,361 reviews
Finnair
7.6
Good
1,323 reviews

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 15 flights from Philadelphia to London per day from 7 different airlines.

  • How long is the flight from Philadelphia to London?

    Airlines like United Airlines, British Airways, and JetBlue fly from Philadelphia to London in about 7h. The time it takes to get you to your destination can typically vary by up to 16h 50m. 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 JetBlue is currently your cheapest option to London, with prices starting at $504. Additional round-trip tickets that might be worth considering are offered by British Airways and American Airlines, with the lowest prices starting at $510 and $516, respectively. These flights start at 36% lower than the current average price 3 months from now.

  • 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 Aer Lingus (78%), American Airlines (67%) and Finnair (67%).

  • What are the cheapest flights from Philadelphia to London?

    On average you can expect to pay $1,915 for a flight from Philadelphia to London. The cheapest flight overall is $436 while the most popular route, (Philadelphia - London Heathrow) is currently priced at $470.

  • Where are the most common layover locations when flying from Philadelphia to London?

    The most popular layover on flights from Philadelphia to London is Dublin.

  • What are some popular things to do or see while on a layover in Dublin?

    The majority of Dublin visitors spend their time at St. Patrick's Cathedral, Glasnevin Cemetery, and Parnell Square. St. Patrick's Cathedral, Glasnevin Cemetery, and Parnell Square are located about 6.1 mi, 3.9 mi, and 5.0 mi, respectively from Dublin. Travelers can book a car rental at Dublin for about $22 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Philadelphia to London flights?

    Philadelphia to London flights that have layovers will least frequently stop in Boston.

  • 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, November is the cheapest month in which you can book a flight from Philadelphia to London (average of $661). Flying from Philadelphia to London in June is currently the most expensive (average of $1,098). 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
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Gatwick
Borehamwood
Aylesbury
Bedford
Wembley
Folkestone
Chichester
Arundel

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Alternative routes for Philadelphia to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Philadelphia to London

Discover the top 7 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$504Average$637FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$510Average$734FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$516Average$859FlexibilityNo cancel feeOn-time71%
FinnairCheapest$562Average$781FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$583Average$804FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$602Average$777FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$673Average$936FlexibilityNo cancel feeOn-time69%

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