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$188+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
Mar 17 — Mar 241
Mon 3/17
Mon 3/24
1 adult, Economy
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1. Tell us where you want to go
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The best prices from Philadelphia to London are usually found in February or October, booked 9 days in advance, depart on a Wednesday or Tuesday 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 March 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$633
(Kiwi.com)

One-way from

$188
(Norse)

Popular in

June

Cheapest in

February

Average price

$739

Good round-trip deal

$740 or less

Good one-way deal

$549 or less
Provider with most accurate pricing for Philadelphia-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-London (LON) flights.
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From Philadelphia to London (LON)
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One-way flight from Philadelphia to London (LON)
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($203 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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).
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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 March 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Mon 3/3112:48 pmPHL - LGW
1 stop16h 12mMultiple Airlines
Fri 4/41:45 pmLGW - PHL
2 stops26h 35mMultiple Airlines
Deal found 3/12$633
This Cheapflightsfares deal was found by Cheapflights users on 3/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/106:33 pmPHL - LHR
1 stop10h 57mIberia
Thu 8/2112:15 pmLHR - PHL
Nonstop7h 55mIberia
Deal found 3/11$634
This JetBlue Airways deal was found by Cheapflights users on 3/12. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:25 amPHL - LHR
1 stop15h 05mJetBlue
Thu 11/68:25 amLHR - PHL
1 stop13h 57mJetBlue
Deal found 3/12$637
This Mytrip deal was found by Cheapflights users on 3/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:00 amPHL - STN
3 stops23h 40mMultiple Airlines
Tue 5/611:40 amSTN - PHL
3 stops25h 08mMultiple Airlines
Deal found 3/12$638
This Booking.com deal was found by Cheapflights users on 3/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/18:30 pmPHL - LHR
1 stop9h 40mAer Lingus
Tue 4/81:25 pmLHR - PHL
1 stop10h 35mAer Lingus
Deal found 3/11$641
This JetBlue deal was found by Cheapflights users on 3/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:35 pmPHL - LGW
1 stop10h 00mJetBlue
Wed 9/1012:10 pmLGW - PHL
1 stop14h 20mJetBlue
Deal found 3/12$641
This Ticket deal was found by Cheapflights users on 3/12. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1011:00 amPHL - LHR
1 stop14h 45mVirgin Atlantic
Wed 4/1611:20 amLHR - PHL
1 stop18h 29mVirgin Atlantic
Deal found 3/12$644
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/82:47 pmPHL - LHR
1 stop13h 43mBritish Airways
Tue 4/2912:30 pmLHR - PHL
Nonstop7h 45mBritish Airways
Deal found 3/11$650
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Fri 11/216:40 pmPHL - LHR
Nonstop6h 55mAmerican Airlines
Fri 11/287:50 amLHR - PHL
1 stop13h 40mAmerican Airlines
Deal found 3/10$654
This Finnair deal was found by Cheapflights users on 3/11. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:40 pmPHL - LHR
Nonstop7h 15mFinnair
Fri 9/57:15 amLHR - PHL
1 stop14h 10mFinnair
Deal found 3/11$657
This Gotogate deal was found by Cheapflights users on 3/12. 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.
Tue 4/810:43 amPHL - LHR
2 stops14h 47mMultiple Airlines
Tue 4/296:30 amLHR - PHL
1 stop14h 30mMultiple Airlines
Deal found 3/12$662
This oojo deal was found by Cheapflights users on 3/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/262:46 pmPHL - LGW
1 stop12h 44mBritish Airways
Mon 6/92:00 pmLGW - PHL
1 stop24h 35mBritish Airways
Deal found 3/12$666

Find flights from Philadelphia to London within your budget

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 March 12, 2025.

Fly from

Philadelphia

Fly to

London

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 3/31

12:48 pm-10:00 am

1 stop16h 12m

London Gatwick

Fri 4/4

1:45 pm-11:20 am

2 stops26h 35m

$633

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 8/10

6:33 pm-10:30 am

1 stop10h 57m

London Heathrow

Thu 8/21

12:15 pm-3:10 pm

Nonstop7h 55m

$634

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 4/25

8:34 am-6:30 am

1 stop16h 56m

London Heathrow

Wed 4/30

8:25 am-4:41 pm

1 stop13h 16m

$637

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Tue 4/29

6:00 am-10:40 am

3 stops23h 40m

London Stansted

Tue 5/6

11:40 am-7:48 am

3 stops25h 08m

$638

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 4/1

8:30 pm-11:10 am

1 stop9h 40m

London Heathrow

Tue 4/8

1:25 pm-7:00 pm

1 stop10h 35m

$641

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 4/10

11:00 am-6:45 am

1 stop14h 45m

London Heathrow

Wed 4/16

11:20 am-12:49 am

1 stop18h 29m

$644

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 5/12

6:00 pm-7:50 am

1 stop8h 50m

London Heathrow

Mon 5/19

3:35 pm-4:35 pm

1 stop30h 00m

$647

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/27

7:40 pm-7:55 am

Nonstop7h 15m

London Heathrow

Fri 9/5

7:15 am-4:25 pm

1 stop14h 10m

$657

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/26

10:15 pm-9:20 am

Nonstop7h 05m

London Heathrow

Tue 4/1

8:55 am-4:50 pm

1 stop12h 55m

$659

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Wed 3/26

2:46 pm-7:30 am

1 stop12h 44m

London Gatwick

Mon 6/9

2:00 pm-9:35 am

1 stop24h 35m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 60 results
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
Trip.comPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-London flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

The best insider tips for Philadelphia to London flights

Find out what our experts recommend to make the most of your Philadelphia to London trip
Airports
PHL

For efficient check-in, verify your airline’s terminal before arriving. Terminals are spread out, and only some are linked by indoor walkways.

Read more about PHLby Mark Chesnut
LHR

Take the Heathrow Express for the fastest route to central London, reaching Paddington Station quickly and conveniently.

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

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.

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.

Travel insights for flights from Philadelphia to London

Get recent, data-driven insights about flights from Philadelphia to London including ideal travel times, pricing trends, and more.

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 March 7, 2025.

Booking 9 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 $1,127). 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 March 12, 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 16% 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 March 12, 2025.

The most flights from PHL to LON are scheduled on a Monday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 March 12, 2025.
To help decide which airline to fly from Philadelphia to London, see what other customers have to say about Delta, KLM and Finnair. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
7,953 reviews
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,320 reviews
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,268 reviews
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.5
Good
1,566 reviews
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,623 reviews
Delta
8.0
Very good
7,953 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 9 flights from Philadelphia to London per day from 9 different airlines.

  • 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 $638. Additional round-trip tickets that might be worth considering are offered by Iberia and Aer Lingus, with the lowest prices starting at $639 and $641, respectively. These flights start at 22% 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 $249. Users have also found prices from $421 and $443 on Aer Lingus and Air Canada, 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 Aer Lingus (78%), American Airlines (75%) and Finnair (75%).

  • What are the cheapest flights from Philadelphia to London?

    On average you can expect to pay $2,257 for a flight from Philadelphia to London. The cheapest flight overall is $478 while the most popular route, (Philadelphia - London Heathrow) is currently priced at $593.

  • 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 Molly Malone Statue, St. Patrick's Cathedral, and Parnell Square. Molly Malone Statue, St. Patrick's Cathedral, and Parnell Square are located about 5.8 mi, 6.1 mi, and 5.0 mi, respectively from Dublin. Travelers can book a car rental at Dublin for about $21 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 $1,127). 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
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Gatwick
Milton Keynes
Dover
Orpington
Watford
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Chelmsford

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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 9 airlines flying from Philadelphia to London

Discover the top 9 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 March 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$467Average$690FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$586Average$846FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$589Average$827FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$614Average$789FlexibilityNo cancel feeOn-time70%
DeltaCheapest$615Average$678FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$617Average$779FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$835FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$673Average$936FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$786Average$987FlexibilityNo cancel feeOn-time76%
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