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 21 flights in this direction every week. Most depart out of Atlanta Hartsfield-Jackson, with the best deal for KLM flights to Philadelphia being £303 (round-trip, Birmingham to Philadelphia, momondo searches within the last 72 hours). In 1,389 KLM reviews, it is rated 7.8 by momondo users.

Finnair Flights to Philadelphia

Finnair flight deals to Philadelphia start from £448 - 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 1,332 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 44m 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 25m.

£235 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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Cheap return flights

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06:50 - 14:47LHR-PHL

12h 57m2 stops

15:30 - 07:10PHL-LHR

10h 40m1 stop

£436Multiple Airlines

Find Deal

Thu, 27 Nov - Thu, 4 Dec

12:45 - 13:55LHR-PHL

30h 10m1 stop

15:08 - 07:00PHL-LHR

10h 52m1 stop

£437British Airways

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Sun, 23 Nov - Wed, 3 Dec

07:30 - 19:05LHR-PHL

15h 35m2 stops

12:40 - 09:10PHL-LHR

15h 30m2 stops

£439United Airlines

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Wed, 29 Oct - Mon, 10 Nov

07:30 - 19:05LHR-PHL

15h 35m2 stops

10:34 - 05:55PHL-LHR

14h 21m2 stops

£439United Airlines

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Tue, 28 Oct - Tue, 4 Nov

13:50 - 12:17LHR-PHL

27h 27m1 stop

15:35 - 10:25PHL-LHR

13h 50m2 stops

£448Finnair

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Mon, 5 Jan - Tue, 27 Jan

08:50 - 16:00LHR-PHL

12h 10m1 stop

17:30 - 10:10PHL-LHR

11h 40m1 stop

£450Aer Lingus

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Fri, 28 Nov - Wed, 3 Dec

10:15 - 13:25LHR-PHL

8h 10mdirect

19:45 - 07:50PHL-LHR

7h 05mdirect

£462Iberia

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Mon, 3 Nov - Mon, 10 Nov

08:20 - 16:00EDI-PHL

12h 40m1 stop

21:15 - 11:30PHL-EDI

9h 15m1 stop

£545Aer Lingus

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Wed, 5 Nov - Mon, 1 Dec

06:05 - 13:25EDI-PHL

12h 20m1 stop

18:35 - 20:55PHL-EDI

21h 20m1 stop

£613Finnair

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Mon, 24 Nov - Mon, 1 Dec

07:50 - 15:35LCY-PHL

12h 45m1 stop

20:00 - 14:35PHL-LCY

13h 35m1 stop

£627Iberia

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Fri, 16 Jan - Sun, 18 Jan

Fly from

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

06:50-14:47

2 stops12h 57m

Philadelphia

Thu 4/12

15:30-07:10

1 stop10h 40m

£436

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 23/11

12:45-13:55

1 stop30h 10m

Philadelphia

Wed 3/12

15:08-07:00

1 stop10h 52m

£437

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 29/10

07:30-19:05

2 stops15h 35m

Philadelphia

Mon 10/11

12:40-09:10

2 stops15h 30m

£439

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 28/10

07:30-19:05

2 stops15h 35m

Philadelphia

Tue 4/11

10:34-05:55

2 stops14h 21m

£439

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/1

13:50-12:17

1 stop27h 27m

Philadelphia

Tue 27/1

15:35-10:25

2 stops13h 50m

£448

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 28/11

08:50-16:00

1 stop12h 10m

Philadelphia

Wed 3/12

17:30-10:10

1 stop11h 40m

£450

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 3/11

10:15-13:25

Nonstop8h 10m

Philadelphia

Mon 10/11

19:45-07:50

Nonstop7h 05m

£462

EdinburghPhiladelphia

EDI - PHL

EDIPHL

Edinburgh Turnhouse

Wed 5/11

08:20-16:00

1 stop12h 40m

Philadelphia

Mon 1/12

21:15-11:30

1 stop9h 15m

£545

EdinburghPhiladelphia

EDI - PHL

EDIPHL

Edinburgh Turnhouse

Mon 24/11

06:05-13:25

1 stop12h 20m

Philadelphia

Mon 1/12

18:35-20:55

1 stop21h 20m

£613

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Fri 16/1

07:50-15:35

1 stop12h 45m

Philadelphia

Sun 18/1

20:00-14:35

1 stop13h 35m

£627

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 £495.

What is the absolute cheapest flight to Philadelphia?

£36 is the cheapest deal found on momondo in the last two weeks for a flight to Philadelphia. This flight is from Nashville and is 91% 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 Tuesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £604. 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 £667.

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 £499. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £635 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 £561 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 £504 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 £471 in March
MOST EXPENSIVE MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORT	December	21% more expensive	It costs about £683 for flights to Philadelphia from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORT	December	224% more users visited	More momondo users searched in flights to Philadelphia from London Heathrow Airport in December than any other month

Cheap Philadelphia flight deals and tips

Summary info about Philadelphia flight prices, duration and airlines

Best One-Way Price	£235
Best Round-Trip Price	£436
Fastest flight time	26h 40m
Popular in	August

The best one-way flight price to Philadelphia from United Kingdom in the last 72 hours is £235 (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 £436 (London Heathrow to Philadelphia).

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The fastest flight to Philadelphia from United Kingdom takes 26h 40m (Edinburgh Turnhouse to Philadelphia).

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August has the highest demand for flights to Philadelphia, with a 9% 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 £547. 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 £473 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 £41 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 October 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 use momondo?

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.