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Philadelphia

$546+ Cheap flights from London (LON) to Philadelphia (PHL)

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PHL
ago. 18 — ago. 251
lun. 8/18
lun. 8/25
1 adult, Economy
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Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 16 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from London to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Philadelphia (PHL). 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 agosto 13, 2025.

Round-trip from

$634
(Mytrip)

One-way from

$546
(Ovago)

Popular in

August

Cheapest in

February

Average price

$914

Good round-trip deal

$721 or less

Good one-way deal

$752 or less
From London (LON) to Philadelphia
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One-way flight from London (LON) to Philadelphia
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Highest demand for flights based on searches. 7% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from London (LON) to Philadelphia.
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Price to beat on a one-way flight from London (LON) to Philadelphia.
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Find flight deals from London to Philadelphia

Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 13, 2025.

This Mytrip deal was found by Cheapflights users on 8/11. 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.
sáb. 9/136:35 amSTN - PHL
3 stops20h 33mMultiple Airlines
lun. 12/85:15 amPHL - STN
3 stops36h 25mMultiple Airlines
Deal found 8/11$634
This ChecknFly deal was found by Cheapflights users on 8/11. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/126:50 amLHR - PHL
2 stops12h 48mAir Canada
dom. 9/213:25 pmPHL - LHR
1 stop13h 10mAir Canada
Deal found 8/11$634
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/276:30 amLHR - PHL
1 stop14h 30mUnited Airlines
jue. 12/46:30 amPHL - LHR
1 stop20h 25mUnited Airlines
Deal found 8/11$635
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
vie. 10/32:00 pmLGW - PHL
1 stop15h 52mMultiple Airlines
jue. 10/166:35 amPHL - LGW
2 stops18h 45mMultiple Airlines
Deal found 8/13$635
This The Travel House deal was found by Cheapflights users on 8/12. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/18:25 amLHR - PHL
1 stop30h 15mIcelandair
dom. 9/147:00 amPHL - LHR
2 stops32h 45mIcelandair
Deal found 8/12$636
This Air Canada deal was found by Cheapflights users on 8/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/276:50 amLHR - PHL
2 stops12h 57mMultiple Airlines
jue. 12/41:15 pmPHL - LHR
2 stops12h 55mMultiple Airlines
Deal found 8/11$637
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
mié. 9/172:00 pmLGW - PHL
1 stop22h 35mMultiple Airlines
lun. 9/292:07 pmPHL - LGW
2 stops35h 13mMultiple Airlines
Deal found 8/13$637
This Gotogate deal was found by Cheapflights users on 8/12. 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.
mar. 9/96:50 amLHR - PHL
2 stops13h 59mAir Canada
mar. 9/1610:35 amPHL - LHR
2 stops14h 55mAir Canada
Deal found 8/12$638
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
sáb. 9/2710:00 amLGW - PHL
2 stops17h 29mMultiple Airlines
sáb. 10/42:15 pmPHL - LGW
1 stop14h 45mMultiple Airlines
Deal found 8/13$638
This ChecknFly deal was found by Cheapflights users on 8/12. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/296:50 amLHR - PHL
2 stops12h 47mAir Canada
jue. 9/1110:35 amPHL - LHR
1 stop18h 25mAir Canada
Deal found 8/12$639
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
lun. 9/12:00 pmLGW - PHL
1 stop28h 01mMultiple Airlines
mar. 9/96:25 amPHL - LGW
2 stops18h 55mMultiple Airlines
Deal found 8/12$639
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
jue. 8/2810:00 amLGW - PHL
1 stop28h 46mMultiple Airlines
jue. 9/45:15 amPHL - LGW
2 stops20h 05mMultiple Airlines
Deal found 8/13$640

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Philadelphia 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 agosto 13, 2025.
Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Fly from

London

Fly to

Philadelphia

Route

Depart

Return

Price

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

sáb. 9/13

6:35 am-10:08 pm

3 stops20h 33m

Philadelphia

lun. 12/8

5:15 am-10:40 pm

3 stops36h 25m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

vie. 9/19

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

mié. 9/24

3:25 pm-9:35 am

1 stop13h 10m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

vie. 9/12

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

sáb. 9/27

3:25 pm-9:35 am

1 stop13h 10m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sáb. 9/13

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

lun. 12/8

3:30 pm-7:10 am

1 stop10h 40m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 9/25

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

jue. 10/2

3:25 pm-9:35 am

1 stop13h 10m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

vie. 9/12

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

dom. 9/21

3:25 pm-9:35 am

1 stop13h 10m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 1/15

6:50 am-2:47 pm

2 stops12h 57m

Philadelphia

dom. 1/18

3:30 pm-7:10 am

1 stop10h 40m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

vie. 9/26

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

vie. 10/3

10:35 am-10:00 am

1 stop18h 25m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 11/27

6:50 am-2:47 pm

2 stops12h 57m

Philadelphia

jue. 12/4

3:30 pm-7:10 am

1 stop10h 40m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

mié. 9/3

9:30 am-4:00 pm

1 stop11h 30m

Philadelphia

mié. 9/10

3:00 pm-9:20 am

2 stops13h 20m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 60 results
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The best insider tips for London to Philadelphia 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 London to Philadelphia trip
Airports
LHR

Expect strict security at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

Read more about LHRby Ramsey Qubein
PHL

Use SEPTA trains for efficient travel to Center City Philadelphia. Stations are near Terminals A, B, C/D, and E/F.

Read more about PHLby Mark Chesnut
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 London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London 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 London to Philadelphia

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

Use this chart to determine the optimal time to book a round-trip flight from London to Philadelphia. Price data was last updated on August 8, 2025.

The best time to book flights from London to Philadelphia is 16 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 London to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from London to Philadelphia (average of $236). Flying from London to Philadelphia in March is currently the most expensive (average of $295). 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 LON to PHL?

Find hourly flight availability from London to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 13, 2025.

When flying from London to Philadelphia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 15% versus a flight at noon.

Weekly flight availability from London to Philadelphia

Explore weekly flight availability from London to Philadelphia. 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 agosto 13, 2025.

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

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

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated agosto 13, 2025.
Get a feel of what it's like to fly with Finnair, American Airlines, and Aer Lingus from London to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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
1,321 reviews
Finnair
7.6
Good
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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.
Aer Lingus
7.1
Good
1,212 reviews
Finnair
7.6
Good
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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
2,878 reviews
Finnair
7.6
Good
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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
7,265 reviews
Finnair
7.6
Good
1,321 reviews

Comfort

7.5

Boarding

7.6

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

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 London to Philadelphia. 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 into for flights to Philadelphia from London?

    Located just 7.0 mi from the city center, Philadelphia is the airport most travelers will use when flying to Philadelphia from London. Booking flights from London to Philadelphia (PHL) should be relatively easy as there are 14 daily inbound flights from London from 5 different airlines.

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

    According to our current data, Air Canada ($634), and United Airlines ($635) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 14% less than the average price by searching for these airlines.

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

    When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London Gatwick - Philadelphia or London City - Philadelphia as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Philadelphia on time: Aer Lingus (67%), American Airlines (66%), Finnair (66%).

  • What are the cheapest flights from London to Philadelphia?

    While on average a flight from London to Philadelphia is generally $1,090, our data shows the cheapest flight currently is $654. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $549 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Philadelphia 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 London to Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from London to Philadelphia (average of $236). Flying from London to Philadelphia in March is currently the most expensive (average of $295). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Vineland
Wildwood
King of Prussia
Pottstown
Cherry Hill
Ocean City
Reading
Millville
Ephrata
Camden
Dewey Beach
Dover
Elkton
Essington
Willow Grove
Newark
Chester
Exton
Glen Mills
Springfield

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Newark flights
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Top 5 airlines flying from London to Philadelphia

Discover the top 5 airlines that operate flights from London to Philadelphia. 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 agosto 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$559Average$800FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$592Average$766FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$601Average$800FlexibilityNo cancel feeOn-time70%
FinnairCheapest$648Average$767FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$725Average$1,241FlexibilityNo cancel feeOn-timeN/A

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