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Flights to Philadelphia

£217 Cheap flights to Philadelphia

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Philadelphia departing on 5/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United Kingdom to Philadelphia

Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
09:20 - 22:36
LHR
-
PHL
18h 16m
1 stop
JetBlue Logo
06:00 - 06:55
PHL
-
LHR
20h 55m
1 stop
£430JetBlue
Fri, 6 Mar - Sun, 15 Mar
JetBlue Logo
09:20 - 22:36
LHR
-
PHL
18h 16m
1 stop
JetBlue Logo
06:00 - 06:55
PHL
-
LHR
20h 55m
1 stop
£432JetBlue
Sat, 7 Mar - Sun, 15 Mar
Multiple Airlines Logo
14:00 - 07:32
LGW
-
PHL
22h 32m
1 stop
Multiple Airlines Logo
06:10 - 10:00
PHL
-
LGW
22h 50m
2 stops
£433Multiple Airlines
Thu, 5 Mar - Mon, 30 Mar
United Airlines Logo
18:00 - 14:49
LHR
-
PHL
25h 49m
1 stop
United Airlines Logo
18:40 - 16:50
PHL
-
LHR
18h 10m
1 stop
£452United Airlines
Sat, 7 Mar - Sun, 8 Mar
British Airways Logo
06:50 - 14:55
LCY
-
PHL
12h 05m
1 stop
British Airways Logo
21:50 - 12:40
PHL
-
LCY
10h 50m
1 stop
£556British Airways
Mon, 9 Mar - Mon, 16 Mar
British Airways Logo
06:50 - 14:55
LCY
-
PHL
12h 05m
1 stop
British Airways Logo
19:45 - 14:05
PHL
-
LCY
14h 20m
1 stop
£563British Airways
Wed, 11 Mar - Wed, 18 Mar
Finnair Logo
14:35 - 12:05
GLA
-
PHL
26h 30m
1 stop
Finnair Logo
19:25 - 13:15
PHL
-
GLA
12h 50m
1 stop
£582Finnair
Tue, 21 Apr - Tue, 5 May
Finnair Logo
13:05 - 15:25
GLA
-
PHL
31h 20m
1 stop
Finnair Logo
22:05 - 14:40
PHL
-
GLA
11h 35m
1 stop
£584Finnair
Tue, 21 Apr - Tue, 5 May
American Airlines Logo
13:05 - 12:05
GLA
-
PHL
28h 00m
1 stop
American Airlines Logo
22:05 - 16:05
PHL
-
GLA
13h 00m
1 stop
£621American Airlines
Tue, 21 Apr - Thu, 7 May
United Airlines Logo
06:00 - 09:47
MAN
-
PHL
31h 47m
2 stops
United Airlines Logo
17:10 - 14:50
PHL
-
MAN
41h 40m
2 stops
£636United Airlines
Mon, 16 Mar - Mon, 23 Mar

momondo Fare Finder

 
Locate flights to Philadelphia that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 279,928 searches and data was last updated on 10 February 2026.
Use the filters below to find and compare flights to Philadelphia that are best for you.

Fly from

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 6/3

09:20-22:36

1 stop18h 16m

Philadelphia

Sun 15/3

06:00-06:55

1 stop20h 55m

£430

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 7/3

09:20-22:36

1 stop18h 16m

Philadelphia

Sun 15/3

06:00-06:55

1 stop20h 55m

£432

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 5/3

14:00-07:32

1 stop22h 32m

Philadelphia

Mon 30/3

06:10-10:00

2 stops22h 50m

£433

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 7/3

18:00-14:49

1 stop25h 49m

Philadelphia

Sun 8/3

18:40-16:50

1 stop18h 10m

£452

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 9/3

06:50-14:55

1 stop12h 05m

Philadelphia

Mon 16/3

21:50-12:40

1 stop10h 50m

£556

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 11/3

06:50-14:55

1 stop12h 05m

Philadelphia

Wed 18/3

19:45-14:05

1 stop14h 20m

£563

GlasgowPhiladelphia

GLA - PHL

GLAPHL

Glasgow Intl

Tue 21/4

14:35-12:05

1 stop26h 30m

Philadelphia

Tue 5/5

19:25-13:15

1 stop12h 50m

£582

GlasgowPhiladelphia

GLA - PHL

GLAPHL

Glasgow Intl

Tue 21/4

13:05-15:25

1 stop31h 20m

Philadelphia

Tue 5/5

22:05-14:40

1 stop11h 35m

£584

GlasgowPhiladelphia

GLA - PHL

GLAPHL

Glasgow Intl

Tue 21/4

13:05-12:05

1 stop28h 00m

Philadelphia

Thu 7/5

22:05-16:05

1 stop13h 00m

£621

ManchesterPhiladelphia

MAN - PHL

MANPHL

Manchester

Mon 16/3

06:00-09:47

2 stops31h 47m

Philadelphia

Mon 23/3

17:10-14:50

2 stops41h 40m

£636

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Philadelphia from

Philadelphia flights insights and trends

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

What is the cheapest month to fly to Philadelphia?

If you aren’t able to travel during the month of September, then book flights to Philadelphia from United Kingdom during May instead. Flights to Philadelphia in May, while not as cheap as those in September, still average around £517.

What is the absolute cheapest flight to Philadelphia?

£47 is the cheapest deal found on momondo in the last two weeks for a flight to Philadelphia. This flight is from Orlando 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.

See prices from:

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 £594. 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 £650.

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 morning when flights can be purchased for as low as £614. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £616 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 £564 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 £503 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 AIRPORTSeptember12% cheaperFlying from London Heathrow Airport to Philadelphia costs on average just £498 in September
MOST EXPENSIVE MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORTAugust17% more expensiveIt costs about £663 for flights to Philadelphia from London Heathrow Airport in August
MOST POPULAR MONTH TO FLY TO PHILADELPHIA FROM LONDON HEATHROW AIRPORTJuly220% more users visitedMore 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

£217

Best Round-Trip Price

£430

Fastest flight time

11h 50m

Popular in

January
The best one-way flight price to Philadelphia from United Kingdom in the last 72 hours is £217 (London Gatwick to Philadelphia).
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The best round-trip flight price to Philadelphia from United Kingdom in the last 72 hours is £430 (London Heathrow to Philadelphia).
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The fastest flight to Philadelphia from United Kingdom takes 11h 50m (London City to Philadelphia).
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January 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 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 87 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 £553. 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 £462 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 13 as of February 2026.

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.

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Reading
Newark
Vineland
King of Prussia
Dover
Essington
Cape May
Rehoboth Beach
Cherry Hill
Dewey Beach

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.

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