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

According to our current data, JetBlue ($546), Air Canada ($593), and Finnair ($595) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 27% less than the average price by searching for these airlines.

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

The cheapest airlines for a one-way flight from London to Philadelphia are Aer Lingus ($563), Lufthansa ($609), and Finnair ($644).

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

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

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 cheapest flights from London to Philadelphia?

While on average a flight from London to Philadelphia is generally $1,117, our data shows the cheapest flight currently is $620. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $594 for that flight.

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 (79%), American Airlines (77%), Finnair (77%).

What are the most popular airlines that fly from London to Philadelphia?

Before booking your flight from London to Philadelphia check out the most popular airlines for this route: American Airlines, Finnair or British Airways.

What is the cheapest day to fly round-trip from London to Philadelphia?

Flights from London to Philadelphia are found to be more expensive on Thursday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Philadelphia.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 56 days in advance, which can save you up to 35% on flights from London to Philadelphia compared to booking the week you need them. Waiting 56 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $737. For sooner than that we have options available in the next 3 days from $1,015.

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

February is one of the best times of the year to fly to Philadelphia from London. Prices for February average $758 per person but you can even find prices for as low as $524. The most expensive prices can be found in the month of August. Opting for a February flight can save you 27% on your journey compared to booking in August

Most accurate provider : When it comes to deals on London-Philadelphia flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on London-Philadelphia flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from London-Philadelphia flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London-Philadelphia flights, Cheapflights users trust Mytrip the most. Mytrip 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 London-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 15 daily inbound flights from London from 5 different airlines.

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.

$546+ Flights from London to Philadelphia

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from London to Philadelphia with Cheapflights

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from London to Philadelphia

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$546 (JetBlue)
Popular in	August
Cheapest in	February
Average price	$752
Good round-trip deal	$739 or less
Good one-way deal	$698 or less

Provider with most accurate pricing for London (LON)-Philadelphia flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-Philadelphia flights.

Search Deals

From London (LON) to Philadelphia

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($85 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Philadelphia.

Search Deals

Price to beat on a one-way flight from London (LON) to Philadelphia.

Search Deals

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 April 25, 2025.

Wed 9/1012:10 pmLGW - PHL

1 stop11h 32mJetBlue

Wed 10/83:00 pmPHL - LGW

1 stop13h 35mJetBlue

Deal found 4/25

$546

Sat 6/710:00 amLGW - PHL

1 stop17h 17mMultiple Airlines

Thu 7/175:36 pmPHL - LGW

1 stop32h 19mMultiple Airlines

Deal found 4/25

$566

Mon 5/59:30 amLHR - PHL

1 stop10h 06mAir Canada

Mon 5/129:45 amPHL - LHR

1 stop19h 15mAir Canada

Deal found 4/25

$593

Sat 5/38:30 amLHR - PHL

1 stop30h 49mLufthansa

Sun 5/185:35 pmPHL - LHR

1 stop14h 05mLufthansa

Deal found 4/24

$594

Wed 9/108:25 amLHR - PHL

1 stop15h 17mJetBlue

Wed 10/83:00 pmPHL - LHR

1 stop10h 30mJetBlue

Deal found 4/25

$602

Thu 9/258:30 amLHR - PHL

1 stop12h 30mMultiple Airlines

Sun 9/283:25 pmPHL - LHR

1 stop13h 10mMultiple Airlines

Deal found 4/24

$603

Mon 5/57:25 amLHR - PHL

2 stops37h 23mUnited Airlines

Mon 5/126:15 amPHL - LHR

1 stop19h 40mUnited Airlines

Deal found 4/24

$614

Wed 6/48:00 amLHR - PHL

1 stop12h 40mFinnair

Wed 6/111:55 pmPHL - LHR

1 stop11h 20mFinnair

Deal found 4/24

$629

Wed 5/71:25 pmLHR - PHL

1 stop10h 35mBritish Airways

Wed 5/147:30 pmPHL - LHR

Nonstop7h 25mBritish Airways

Deal found 4/25

$638

Mon 6/96:20 amSTN - PHL

3 stops20h 46mMultiple Airlines

Mon 6/163:20 pmPHL - STN

3 stops25h 50mMultiple Airlines

Deal found 4/25

$641

Wed 6/412:30 pmLHR - PHL

Nonstop7h 45mAmerican Airlines

Wed 6/111:55 pmPHL - LHR

1 stop11h 20mAmerican Airlines

Deal found 4/24

$651

Sat 6/712:10 pmLGW - PHL

1 stop15h 19mIcelandair

Thu 7/1710:25 amPHL - LGW

1 stop18h 10mIcelandair

Deal found 4/25

$663

Best flights from London to Philadelphia
Discover carefully curated flight deals from London to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 25, 2025.

Wed 9/1012:10 pmLGW - PHL

1 stop11h 32mJetBlue

Wed 10/83:00 pmPHL - LGW

1 stop13h 35mJetBlue

Deal found 4/25

$546

Sat 6/710:00 amLGW - PHL

1 stop17h 17mMultiple Airlines

Thu 7/175:36 pmPHL - LGW

1 stop32h 19mMultiple Airlines

Deal found 4/25

$566

Mon 5/59:30 amLHR - PHL

1 stop10h 06mAir Canada

Mon 5/129:45 amPHL - LHR

1 stop19h 15mAir Canada

Deal found 4/25

$593

Tue 5/136:10 amLHR - PHL

1 stop14h 40mFinnair

Tue 5/202:00 pmPHL - LHR

1 stop11h 15mFinnair

Deal found 4/24

$595

Mon 5/57:25 amLHR - PHL

2 stops37h 23mUnited Airlines

Mon 5/126:15 amPHL - LHR

1 stop19h 40mUnited Airlines

Deal found 4/24

$614

Mon 5/59:30 amLHR - PHL

1 stop10h 06mLufthansa

Mon 5/126:45 pmPHL - LHR

1 stop12h 00mLufthansa

Deal found 4/25

$622

Wed 5/71:25 pmLHR - PHL

1 stop10h 35mBritish Airways

Wed 5/1410:10 pmPHL - LHR

Nonstop7h 10mBritish Airways

Deal found 4/24

$636

Wed 6/412:30 pmLHR - PHL

Nonstop7h 45mAmerican Airlines

Wed 6/111:55 pmPHL - LHR

1 stop11h 20mAmerican Airlines

Deal found 4/24

$651

Sat 6/712:10 pmLGW - PHL

1 stop15h 19mIcelandair

Thu 7/1710:25 amPHL - LGW

1 stop18h 10mIcelandair

Deal found 4/25

$663

Wed 5/286:30 amLHR - PHL

1 stop14h 55mIberia

Thu 6/126:30 pmPHL - LHR

Nonstop7h 10mIberia

Deal found 4/25

$719

Wed 5/288:40 amLCY - PHL

2 stops21h 17mVirgin Atlantic

Mon 6/27:19 pmPHL - LCY

2 stops16h 21mVirgin Atlantic

Deal found 4/25

$723

Mon 6/28:40 amLCY - PHL

2 stops15h 34mDelta

Thu 6/121:25 pmPHL - LCY

2 stops12h 50mDelta

Deal found 4/25

$741

Last-minute flights from London to Philadelphia
Discover last-minute flight deals from London to Philadelphia. Data last updated April 25, 2025 and is based on user searches.

Thu 5/18:40 amLHR - PHL

2 stops18h 26mMultiple Airlines

Thu 5/83:20 pmPHL - LHR

1 stop13h 40mMultiple Airlines

Deal found 4/24

$642

Thu 5/12:00 pmLGW - PHL

1 stop34h 36mMultiple Airlines

Thu 5/86:00 amPHL - LGW

1 stop23h 00mMultiple Airlines

Deal found 4/24

$656

Thu 5/112:30 pmLHR - PHL

Nonstop7h 45mFinnair

Sat 5/103:40 pmPHL - LHR

1 stop13h 35mFinnair

Deal found 4/24

$696

Fri 5/211:30 amLHR - PHL

2 stops16h 45mVirgin Atlantic

Sun 9/145:59 pmPHL - LHR

1 stop31h 46mVirgin Atlantic

Deal found 4/24

$700

Sat 5/38:30 amLHR - PHL

1 stop30h 49mLufthansa

Sun 5/185:35 pmPHL - LHR

1 stop14h 05mLufthansa

Deal found 4/24

$594

Sun 5/48:25 amLHR - PHL

1 stop19h 03mIcelandair

Sat 10/116:00 amPHL - LHR

1 stop19h 30mIcelandair

Deal found 4/24

$787

Mon 5/59:30 amLHR - PHL

1 stop10h 06mAir Canada

Mon 5/129:45 amPHL - LHR

1 stop19h 15mAir Canada

Deal found 4/25

$593

Mon 5/57:25 amLHR - PHL

2 stops37h 23mUnited Airlines

Mon 5/126:15 amPHL - LHR

1 stop19h 40mUnited Airlines

Deal found 4/24

$614

Mon 5/510:05 amLHR - PHL

Nonstop7h 45mBritish Airways

Mon 5/126:00 pmPHL - LHR

1 stop8h 50mBritish Airways

Deal found 4/25

$639

Mon 5/510:05 amLHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 5/127:55 pmPHL - LHR

Nonstop7h 10mAmerican Airlines

Deal found 4/25

$660

Mon 5/56:30 amLHR - PHL

2 stops17h 49mDelta

Mon 5/125:00 pmPHL - LHR

2 stops15h 30mDelta

Deal found 4/24

$663

Mon 5/56:25 amSTN - PHL

1 stop17h 35mMultiple Airlines

Mon 5/128:30 pmPHL - STN

1 stop9h 20mMultiple Airlines

Deal found 4/25

$740

One-way flights from London to Philadelphia
Search for one-way flight options from London to Philadelphia. Find affordable one-way fares based on user searches. Data last updated April 25, 2025.

Fri 8/291:25 pmLHR - PHL

1 stop10h 35mAer Lingus

Deal found 4/24

$563

Sun 6/17:00 amLTN - PHL

3 stops44h 43mMultiple Airlines

Deal found 4/25

$566

Fri 6/66:00 amLHR - PHL

2 stops23h 50mMultiple Airlines

Deal found 4/25

$566

Mon 6/96:25 amSTN - PHL

3 stops20h 41mMultiple Airlines

Deal found 4/25

$577

Sat 8/166:45 pmLGW - PHL

3 stops32h 22mMultiple Airlines

Deal found 4/25

$579

Wed 7/98:40 amLCY - PHL

3 stops28h 22mMultiple Airlines

Deal found 4/25

$582

Fri 8/298:55 amLCY - PHL

1 stop12h 05mLufthansa

Deal found 4/25

$609

Wed 5/1410:05 amLHR - PHL

Nonstop7h 45mFinnair

Deal found 4/23

$644

Mon 7/78:15 pmSEN - PHL

3 stops47h 18mMultiple Airlines

Deal found 4/25

$653

Mon 6/210:05 amLHR - PHL

Nonstop7h 45mBritish Airways

Deal found 4/25

$654

Tue 5/278:40 amLCY - PHL

1 stop10h 00mBritish Airways

Deal found 4/24

$661

Thu 6/196:10 amLHR - PHL

1 stop15h 25mIberia

Deal found 4/24

$672

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 9/10

12:10 pm-6:42 pm

1 stop11h 32m

Philadelphia

Wed 10/8

3:00 pm-9:35 am

1 stop13h 35m

$546

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Sat 6/7

10:00 am-10:17 pm

1 stop17h 17m

Philadelphia

Thu 7/17

5:36 pm-6:55 am

1 stop32h 19m

$566

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/5

9:30 am-2:36 pm

1 stop10h 06m

Philadelphia

Mon 5/12

9:45 am-10:00 am

1 stop19h 15m

$593

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 5/13

6:10 am-3:50 pm

1 stop14h 40m

Philadelphia

Tue 5/20

2:00 pm-6:15 am

1 stop11h 15m

$595

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 9/10

8:25 am-6:42 pm

1 stop15h 17m

Philadelphia

Wed 10/8

3:00 pm-6:30 am

1 stop10h 30m

$602

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 9/25

8:30 am-4:00 pm

1 stop12h 30m

Philadelphia

Sun 9/28

3:25 pm-9:35 am

1 stop13h 10m

$603

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/5

7:25 am-3:48 pm

2 stops37h 23m

Philadelphia

Mon 5/12

6:15 am-6:55 am

1 stop19h 40m

$614

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/5

9:30 am-2:36 pm

1 stop10h 06m

Philadelphia

Mon 5/12

6:45 pm-11:45 am

1 stop12h 00m

$622

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 5/7

1:25 pm-7:00 pm

1 stop10h 35m

Philadelphia

Wed 5/14

10:10 pm-10:20 am

Nonstop7h 10m

$636

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 6/9

6:20 am-10:06 pm

3 stops20h 46m

Philadelphia

Mon 6/16

3:20 pm-10:10 pm

3 stops25h 50m

$641

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 60 results

...

Compare providers for flights from London to Philadelphia

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Philadelphia in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust 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 London-Philadelphia flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on London-Philadelphia flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from London-Philadelphia flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-Philadelphia flights, Cheapflights users trust Mytrip the most. Mytrip 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 London-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for London to Philadelphia flights

Cheapflights partnered with top experts to bring you the best recommendations for your London to Philadelphia trip

Airports

LHR

Expect long security lines at Heathrow. Ensure liquids are in a small bag to avoid delays during manual screenings.

PHL

For quick access to downtown Philadelphia, take the SEPTA Airport Line. It's efficient and operates from 5:00 a.m. to midnight.

Our travel experts

Mark Chesnut

Expert on PHL

Ramsey Qubein

Expert on LHR

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?

The best time to book flights from London to Philadelphia is 66 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?

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 17% versus a flight in the morning.

Weekly flight availability from London to Philadelphia

The most flights from LON to PHL 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 Philadelphia by month

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

If weather is an important factor for your trip to Philadelphia, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Philadelphia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,920 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,272 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,582 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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 15 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, JetBlue ($546), Air Canada ($593), and Finnair ($595) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 27% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Philadelphia one-way?
The cheapest airlines for a one-way flight from London to Philadelphia are Aer Lingus ($563), Lufthansa ($609), and Finnair ($644).
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 (79%), American Airlines (77%), Finnair (77%).
What are the cheapest flights from London to Philadelphia?
While on average a flight from London to Philadelphia is generally $1,117, our data shows the cheapest flight currently is $620. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $594 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

Vineland

Pottstown

Wildwood

King of Prussia

Reading

Cherry Hill

Exton

Ocean City

Essington

Chester

Middletown

Willow Grove

Newark

Millville

Ephrata

Camden

Dewey Beach

West Chester

Malvern

Dover

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from London to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$583	Average$805	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$596	Average$783	FlexibilityNo cancel fee	On-time71%
Aer Lingus	Cheapest$640	Average$873	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$644	Average$826	FlexibilityNo cancel fee	On-time77%
Finnair	Cheapest$648	Average$767	FlexibilityNo cancel fee	On-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

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

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Philadelphia with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from London to Philadelphia

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from London to Philadelphia

Cheapest flights from London to PhiladelphiaExplore 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 April 25, 2025.

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 April 25, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from London to Philadelphia

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 London to Philadelphia in April.

The best insider tips for London to Philadelphia flights

Cheapflights partnered with top experts to bring you the best recommendations for your London to Philadelphia trip

Airports

LHR

PHL

Our travel experts

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.

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 April 18, 2025.

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

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 April 25, 2025.

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 April 25, 2025.

Rainfall in Philadelphia by month

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

Temperature in Philadelphia by month

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

Reviews of airlines servicing Philadelphia

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Philadelphia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

What are the most popular routes from London to Philadelphia?

What are the most reliable airlines from London to Philadelphia?

What are the cheapest flights from London to Philadelphia?

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

How can I find direct flights from London to Philadelphia?

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

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

Traveling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from London to Philadelphia

100% Free

Book with Flexibility

Travel Smart

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 April 25, 2025.