Which airlines fly to Philadelphia?

For flights from United Kingdom to Philadelphia, most momondo users will book with popular airlines such as British Airways, Virgin Atlantic, Aer Lingus and Lufthansa. Depending on what airport you fly from, you may have other airlines to choose from.

KLM Flights to Philadelphia

The most popular airline for flights to Philadelphia on momondo is KLM, which operates 29 flights in this direction every week. Most depart out of Atlanta Hartsfield-Jackson, with the best deal for KLM flights to Philadelphia being £310 (round-trip, Birmingham to Philadelphia, momondo searches within the last 72 hours). In 1,411 KLM reviews, it is rated 7.7 by momondo users.

Finnair Flights to Philadelphia

Finnair flight deals to Philadelphia start from £458 - this is the best price found recently on momondo, and was a return journey departing from Edinburgh Turnhouse. Over any normal week, Finnair flight prices are typically higher, but vary depending on where you fly from - London Heathrow is the most popular Finnair departure point to Philadelphia so generally has the most availability. Finnair is scored a 7.6/10 in 1,334 reviews.

How long does it take to fly to Philadelphia?

The flight from United Kingdom to Philadelphia depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from London Heathrow (a popular airport in United Kingdom) to New York John F Kennedy Intl (the most popular airport in Philadelphia), then the flight time is 7h 49m on average. If you fly from Manchester (another popular airport in United Kingdom) to New York John F Kennedy Intl, then the average flight time is 7h 35m.

£254 Cheap Flights to Philadelphia in 2025/26

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Find the cheapest flights from the United Kingdom to Philadelphia

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06:50 - 14:50LHR-PHL

13h 00m2 stops

07:50 - 07:10PHL-LHR

18h 20m2 stops

£489Air Canada

Find Deal

Mon, 8 Dec - Mon, 15 Dec

06:50 - 14:50LHR-PHL

13h 00m2 stops

07:50 - 07:10PHL-LHR

18h 20m2 stops

£489Air Canada

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Mon, 8 Dec - Mon, 15 Dec

11:05 - 14:50LHR-PHL

32h 45m2 stops

07:50 - 07:10PHL-LHR

18h 20m2 stops

£492Air Canada

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Tue, 2 Dec - Mon, 8 Dec

06:30 - 16:05LHR-PHL

14h 35m1 stop

16:35 - 20:35PHL-LHR

23h 00m2 stops

£495United Airlines

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Tue, 2 Dec - Mon, 8 Dec

06:50 - 14:00LCY-PHL

12h 10m1 stop

21:20 - 12:40PHL-LCY

10h 20m1 stop

£566British Airways

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Mon, 8 Dec - Mon, 15 Dec

11:20 - 14:10LGW-PHL

31h 50m1 stop

07:00 - 07:30PHL-LGW

19h 30m1 stop

£568British Airways

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Wed, 7 Jan - Wed, 14 Jan

07:50 - 15:40LCY-PHL

12h 50m1 stop

16:40 - 08:50PHL-LCY

11h 10m1 stop

£599Iberia

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Thu, 5 Feb - Thu, 19 Feb

19:55 - 17:15BHX-PHL

25h 20m2 stops

19:35 - 16:25PHL-BHX

16h 50m2 stops

£634Aer Lingus

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Mon, 9 Mar - Mon, 23 Mar

08:05 - 16:00MAN-PHL

12h 55m1 stop

21:20 - 13:25PHL-MAN

11h 05m1 stop

£637Aer Lingus

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Tue, 2 Dec - Tue, 9 Dec

06:00 - 16:05MAN-PHL

15h 05m1 stop

06:30 - 12:20PHL-MAN

24h 50m2 stops

£650United Airlines

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Tue, 2 Dec - Tue, 9 Dec

Fly from

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 8/12

06:50-14:50

2 stops13h 00m

Philadelphia

Mon 15/12

07:50-07:10

2 stops18h 20m

£489

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 8/12

06:50-14:50

2 stops13h 00m

Philadelphia

Mon 15/12

07:50-07:10

2 stops18h 20m

£489

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

11:05-14:50

2 stops32h 45m

Philadelphia

Mon 8/12

07:50-07:10

2 stops18h 20m

£492

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

06:30-16:05

1 stop14h 35m

Philadelphia

Mon 8/12

16:35-20:35

2 stops23h 00m

£495

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 8/12

06:50-14:00

1 stop12h 10m

Philadelphia

Mon 15/12

21:20-12:40

1 stop10h 20m

£566

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 7/1

11:20-14:10

1 stop31h 50m

Philadelphia

Wed 14/1

07:00-07:30

1 stop19h 30m

£568

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Thu 5/2

07:50-15:40

1 stop12h 50m

Philadelphia

Thu 19/2

16:40-08:50

1 stop11h 10m

£599

BirminghamPhiladelphia

BHX - PHL

BHXPHL

Birmingham

Mon 9/3

19:55-17:15

2 stops25h 20m

Philadelphia

Mon 23/3

19:35-16:25

2 stops16h 50m

£634

ManchesterPhiladelphia

MAN - PHL

MANPHL

Manchester

Tue 2/12

08:05-16:00

1 stop12h 55m

Philadelphia

Tue 9/12

21:20-13:25

1 stop11h 05m

£637

ManchesterPhiladelphia

MAN - PHL

MANPHL

Manchester

Tue 2/12

06:00-16:05

1 stop15h 05m

Philadelphia

Tue 9/12

06:30-12:20

2 stops24h 50m

£650

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Philadelphia flights insights and trends

Explore insights for your Philadelphia flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to Philadelphia?

If you aren’t able to travel during the month of February, then book flights to Philadelphia from United Kingdom during September instead. Flights to Philadelphia in September, while not as cheap as those in February, still average around £505.

What is the absolute cheapest flight to Philadelphia?

£49 is the cheapest deal found on momondo in the last two weeks for a flight to Philadelphia. This flight is from Washington, D.C. and is 89% cheaper than most flights to Philadelphia. To find the cheapest price to Philadelphia from your area, use momondo’s Airport-to-Airport Pricing Tool.

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What is the cheapest day to depart on your flight to Philadelphia?

Our data shows that Wednesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £617. On the other hand, Sunday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £670.

What is the cheapest time of day to depart on your flight to Philadelphia?

The cheapest time of day to fly to Philadelphia is in the afternoon when flights can be purchased for as low as £510. In the morning is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £641 per ticket.

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

You are more likely to see cheaper flights to Philadelphia from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £576 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from United Kingdom for as low as £511 on momondo.

Cheapest flights to Philadelphia

Find the cheapest flights to Philadelphia from your nearest city or airport

Find flights from London Heathrow Airport to Philadelphia

CHEAPEST MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORT	March	17% cheaper	Flying from London Heathrow Airport to Philadelphia costs on average just £482 in March
MOST EXPENSIVE MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORT	December	22% more expensive	It costs about £706 for flights to Philadelphia from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORT	July	200% more users visited	More momondo users searched in flights to Philadelphia from London Heathrow Airport in July than any other month

Cheap Philadelphia flight deals and tips

Summary info about Philadelphia flight prices, duration and airlines

Best One-Way Price	£254
Best Round-Trip Price	£489
Fastest flight time	15h 39m
Popular in	August

The best one-way flight price to Philadelphia from United Kingdom in the last 72 hours is £254 (Edinburgh Turnhouse to Philadelphia).

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The best round-trip flight price to Philadelphia from United Kingdom in the last 72 hours is £489 (London Heathrow to Philadelphia).

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The fastest flight to Philadelphia from United Kingdom takes 15h 39m (London Gatwick to Philadelphia).

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August has the highest demand for flights to Philadelphia, with a 8% price increase on average.

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Frequently asked questions about flying to Philadelphia

When is it best to fly to Philadelphia to go sightseeing?

When planning your flight to Philadelphia, consider that the months of April, May, and September are typically considered the best times to visit if you are looking to go sightseeing. That is when the weather is most cooperative. Sights like University of Pennsylvania and Philadelphia Museum of Art are very popular tourist attractions.

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

Most flyers found that booking tickets 16 days in advance of their planned departure date is the best time to get cheap flights to Philadelphia. During this timeframe, flight prices are around £562. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from United Kingdom for as low as £474 on momondo.

Is there an alternative airport near Philadelphia?

Finding an alternative and possibly cheaper destination airport near Philadelphia is possible. If you are planning a flight to Philadelphia, consider booking flights to Philadelphia Airport (7 mi from Philadelphia city centre), Trenton-Mercer Airport (29 mi from Philadelphia city centre), Greater Wilmington Airport (31 mi from Philadelphia city centre), Atlantic City Airport (46 mi from Philadelphia city centre) or Newark Airport (73 mi from Philadelphia city centre).

Is there a cheaper alternative to flying into Philadelphia?

With an average price of £42 per person, New Windsor Stewart Airport is the cheapest airport to fly into when planning your trip to Philadelphia. This price can fluctuate based on where you are flying from. momondo’s Airport-to-Airport Pricing Tool can help users find the best prices.

When did momondo last update prices for flights to Philadelphia Airport?

Prices for flights to Philadelphia Airport are updated daily.

How many operators does momondo search for flights to Philadelphia Airport?

The number of operators available for flights to Philadelphia Airport is 14 as of November 2025.

How old do you have to be to fly to Philadelphia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The travel and health documents required for your trip to Philadelphia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Philadelphia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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Why should I use momondo to find a flight deal to Philadelphia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Philadelphia. Millions of users trust and use momondo every year so you are in good company.

Can I find flights to Philadelphia with flexible booking policies on momondo?

Yes. All flights to Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Philadelphia?

momondo provides multiple filters to help you find the best flight to Philadelphia. Filter by price, airline, airport, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight to Philadelphia right now. Can momondo alert me if prices change?

Yes. momondo can track flight prices for Philadelphia and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.