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$199+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: 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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$639
(Delta)

One-way from

$220
(Norse)

Popular in

June

Cheapest in

February

Average price

$757

Good round-trip deal

$719 or less

Good one-way deal

$501 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)
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Highest demand for flights based on searches. 18% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This oojo deal was found by Cheapflights users on 4/16. 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 11/113:35 pmPHL - LHR
1 stop9h 20mBritish Airways
Mon 11/171:40 pmLHR - PHL
1 stop29h 15mBritish Airways
Deal found 4/16$610
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/223:15 pmPHL - LHR
1 stop17h 15mDelta
Tue 4/296:15 amLHR - PHL
2 stops15h 21mDelta
Deal found 4/16$631
This oojo deal was found by Cheapflights users on 4/16. 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 4/226:50 pmPHL - LCY
1 stop17h 40mBritish Airways
Tue 4/298:30 pmLCY - PHL
1 stop20h 10mBritish Airways
Deal found 4/16$639
This Mytrip deal was found by Cheapflights users on 4/16. 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.
Fri 5/1612:41 pmPHL - LGW
1 stop13h 14mMultiple Airlines
Wed 5/2110:00 amLGW - PHL
1 stop31h 52mMultiple Airlines
Deal found 4/16$639
This JetBlue deal was found by Cheapflights users on 4/16. 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.
Mon 10/133:00 pmPHL - LHR
1 stop10h 30mJetBlue
Mon 10/208:25 amLHR - PHL
1 stop15h 17mJetBlue
Deal found 4/16$640
This Expedia deal was found by Cheapflights users on 4/15. 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.
Mon 5/1212:34 pmPHL - LHR
1 stop14h 16mIberia
Fri 6/1312:30 pmLHR - PHL
Nonstop7h 55mIberia
Deal found 4/15$642
This American Airlines deal was found by Cheapflights users on 4/16. 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 12/27:45 pmPHL - LHR
Nonstop7h 05mAmerican Airlines
Sun 12/77:50 amLHR - PHL
1 stop11h 05mAmerican Airlines
Deal found 4/16$643
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 9/108:30 pmPHL - LHR
1 stop9h 40mAer Lingus
Thu 9/181:25 pmLHR - PHL
1 stop10h 35mAer Lingus
Deal found 4/16$644
This Air Canada deal was found by Cheapflights users on 4/15. 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.
Wed 9/103:20 pmPHL - LHR
1 stop10h 10mAir Canada
Thu 9/186:50 amLHR - PHL
2 stops12h 50mAir Canada
Deal found 4/15$645
This StudentUniverse deal was found by Cheapflights users on 4/15. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2010:25 pmPHL - LHR
Nonstop6h 55mFinnair
Mon 8/256:10 pmLHR - PHL
2 stops27h 15mFinnair
Deal found 4/15$647
This Air Canada deal was found by Cheapflights users on 4/15. 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.
Mon 9/83:20 pmPHL - LHR
1 stop13h 40mMultiple Airlines
Sat 9/271:30 pmLHR - PHL
2 stops13h 57mMultiple Airlines
Deal found 4/15$649
This JetBlue deal was found by Cheapflights users on 4/17. 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.
Sun 9/143:00 pmPHL - LGW
1 stop13h 35mJetBlue
Sat 9/2712:10 pmLGW - PHL
1 stop15h 12mJetBlue
Deal found 4/17$657

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 April 17, 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 8/20

6:15 pm-1:30 pm

1 stop14h 15m

London Heathrow

Tue 8/26

12:45 pm-9:14 pm

1 stop13h 29m

$639

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Fri 5/16

12:41 pm-6:55 am

1 stop13h 14m

London Gatwick

Wed 5/21

10:00 am-12:52 pm

1 stop31h 52m

$639

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 10/13

3:00 pm-6:30 am

1 stop10h 30m

London Heathrow

Mon 10/20

8:25 am-6:42 pm

1 stop15h 17m

$640

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 9/10

8:30 pm-11:10 am

1 stop9h 40m

London Heathrow

Thu 9/18

1:25 pm-7:00 pm

1 stop10h 35m

$644

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 9/10

3:20 pm-6:30 am

1 stop10h 10m

London Heathrow

Thu 9/18

6:50 am-2:40 pm

2 stops12h 50m

$645

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/20

10:25 pm-10:20 am

Nonstop6h 55m

London Heathrow

Mon 8/25

6:10 pm-4:25 pm

2 stops27h 15m

$647

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/1

7:40 pm-7:55 am

Nonstop7h 15m

London Heathrow

Sun 10/5

10:05 am-1:00 pm

Nonstop7h 55m

$648

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/8

3:20 pm-10:00 am

1 stop13h 40m

London Heathrow

Sat 9/27

1:30 pm-10:27 pm

2 stops13h 57m

$649

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 5/11

6:00 pm-7:50 am

1 stop8h 50m

London Heathrow

Fri 6/13

6:15 am-4:35 pm

1 stop15h 20m

$653

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Sun 9/14

3:00 pm-9:35 am

1 stop13h 35m

London Gatwick

Fri 9/26

12:10 pm-6:42 pm

1 stop11h 32m

$657

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 58 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy1 starTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
ScholarTripPrice Accuracy3 starsTrust Score*3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Philadelphia-London flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

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 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

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 April 11, 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 $1,110). 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 April 17, 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. Wednesday mornings 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 April 17, 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).

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 April 17, 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
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
1,269 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
1,580 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

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 15 flights from Philadelphia to London per day from 8 different airlines.

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

    Flying on Delta is currently your cheapest option to London, with prices starting at $639. Additional round-trip tickets that might be worth considering are offered by JetBlue and Aer Lingus, with the lowest prices starting at $640 and $644, respectively. These flights start at 21% 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 $365. Users have also found prices from $402 and $427 on SWISS and British Airways, 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 (76%), American Airlines (76%) and Finnair (76%).

  • What are the cheapest flights from Philadelphia to London?

    On average you can expect to pay $1,278 for a flight from Philadelphia to London. The cheapest flight overall is $430 while the most popular route, (Philadelphia - London Heathrow) is currently priced at $596.

  • 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 $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 $1,110). 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
Hayes
Hounslow
Thornton Heath
Luton
Horley
Wembley
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Borehamwood
Folkestone
Ilford
Aylesbury
Milton Keynes
Chelmsford
Sutton

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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 8 airlines flying from Philadelphia to London

Discover the top 8 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$467Average$670FlexibilityNo cancel feeOn-time62%
Aer LingusCheapest$586Average$819FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$618Average$783FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$825FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$633Average$783FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$644Average$880FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$673Average$936FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$768Average$987FlexibilityNo cancel feeOn-time76%

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