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Cheap flights from Philadelphia to the United Kingdom from $156

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to the United Kingdom departing on 10/21. 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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0 bags

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Find the cheapest flights from Philadelphia to the United Kingdom

Cheap round-trip flights

Multiple Airlines Logo
4:50 pm - 6:35 amPHL-LHR
32h 45m1 stop
Multiple Airlines Logo
6:50 am - 2:38 pmLHR-PHL
12h 48m2 stops
$491Multiple Airlines
Find Deal
Sat, Oct 4 - Thu, Oct 16
Aer Lingus Logo
5:30 pm - 8:05 amPHL-LHR
9h 35m1 stop
Aer Lingus Logo
8:50 am - 4:00 pmLHR-PHL
12h 10m1 stop
$492Aer Lingus
Find Deal
Tue, Nov 11 - Tue, Nov 18
Multiple Airlines Logo
3:30 pm - 7:10 amPHL-LHR
10h 40m1 stop
Multiple Airlines Logo
6:50 am - 2:47 pmLHR-PHL
12h 57m2 stops
$493Multiple Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9
American Airlines Logo
6:30 pm - 6:40 amPHL-LHR
7h 10mnonstop
American Airlines Logo
8:55 am - 4:50 pmLHR-PHL
12h 55m1 stop
$494American Airlines
Find Deal
Mon, Sep 29 - Thu, Oct 9
American Airlines Logo
7:50 pm - 7:55 amPHL-LHR
7h 05mnonstop
American Airlines Logo
8:25 am - 3:40 pmLHR-PHL
12h 15m1 stop
$496American Airlines
Find Deal
Wed, Oct 22 - Tue, Nov 4
Finnair Logo
6:35 pm - 6:35 amPHL-LHR
7h 00mnonstop
Finnair Logo
1:10 pm - 4:15 pmLHR-PHL
8h 05mnonstop
$506Finnair
Find Deal
Wed, Nov 26 - Thu, Dec 4
British Airways Logo
6:30 pm - 6:40 amPHL-LHR
7h 10mnonstop
British Airways Logo
1:10 pm - 4:15 pmLHR-PHL
8h 05mnonstop
$512British Airways
Find Deal
Wed, Oct 15 - Wed, Nov 5
British Airways Logo
7:45 pm - 7:50 amPHL-LHR
7h 05mnonstop
British Airways Logo
7:40 pm - 3:40 pmLHR-PHL
25h 00m1 stop
$521British Airways
Find Deal
Mon, Nov 17 - Mon, Nov 24
Iberia Logo
6:35 pm - 2:05 pmPHL-LCY
14h 30m2 stops
Iberia Logo
7:50 am - 3:35 pmLCY-PHL
12h 45m1 stop
$539Iberia
Find Deal
Wed, Jan 14 - Wed, Jan 21
Iberia Logo
7:55 pm - 2:05 pmPHL-LCY
13h 10m1 stop
Iberia Logo
7:50 am - 3:30 pmLCY-PHL
12h 40m1 stop
$635Iberia
Find Deal
Tue, Dec 2 - Thu, Dec 11

Air Canada flights from Philadelphia to United Kingdom

Our best Air Canada deals on Philadelphia to United Kingdom flight tickets
Air Canada
Jan 6
PHL3:30 pmPhiladelphia
10h 40m
1 stop
LHR7:10 amLondon Heathrow
Jan 13
LHR1:25 pmLondon Heathrow
30h 06m
2 stops
PHL2:31 pmPhiladelphia
$505
Find similar
Air Canada
Nov 11
PHL3:30 pmPhiladelphia
10h 40m
1 stop
LHR7:10 amLondon Heathrow
Nov 19
LHR6:50 amLondon Heathrow
12h 57m
2 stops
PHL2:47 pmPhiladelphia
$507
Find similar
Air Canada
Nov 12
PHL10:34 amPhiladelphia
15h 36m
2 stops
LHR7:10 amLondon Heathrow
Nov 19
LHR6:50 amLondon Heathrow
12h 57m
2 stops
PHL2:47 pmPhiladelphia
$511
Find similar

Delta flights from Philadelphia to United Kingdom

Our best Delta deals on Philadelphia to United Kingdom flight tickets
Delta
Oct 8
PHL6:50 amPhiladelphia
18h 55m
1 stop
LHR6:45 amLondon Heathrow
Oct 15
LHR6:15 amLondon Heathrow
17h 59m
2 stops
PHL7:14 pmPhiladelphia
$524
Find similar
Delta
Oct 8
PHL5:40 pmPhiladelphia
11h 50m
1 stop
LHR10:30 amLondon Heathrow
Oct 24
LHR8:40 amLondon Heathrow
17h 52m
2 stops
PHL9:32 pmPhiladelphia
$525
Find similar
Delta
Sep 29
PHL1:35 pmPhiladelphia
12h 10m
1 stop
LHR6:45 amLondon Heathrow
Oct 6
LHR9:55 amLondon Heathrow
35h 40m
2 stops
PHL4:35 pmPhiladelphia
$526
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to United Kingdom 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, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Philadelphia to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/4

4:50 pm-6:35 am

1 stop32h 45m

London Heathrow

Thu 10/16

6:50 am-2:38 pm

2 stops12h 48m

$491

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/11

5:30 pm-8:05 am

1 stop9h 35m

London Heathrow

Tue 11/18

8:50 am-4:00 pm

1 stop12h 10m

$492

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 11/7

3:30 pm-7:10 am

1 stop10h 40m

London Heathrow

Sun 11/9

6:50 am-2:47 pm

2 stops12h 57m

$493

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/29

6:30 pm-6:40 am

Nonstop7h 10m

London Heathrow

Thu 10/9

8:55 am-4:50 pm

1 stop12h 55m

$494

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/22

7:50 pm-7:55 am

Nonstop7h 05m

London Heathrow

Tue 11/4

8:25 am-3:40 pm

1 stop12h 15m

$496

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 11/26

6:35 pm-6:35 am

Nonstop7h 00m

London Heathrow

Thu 12/4

1:10 pm-4:15 pm

Nonstop8h 05m

$506

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/15

6:30 pm-6:40 am

Nonstop7h 10m

London Heathrow

Wed 11/5

1:10 pm-4:15 pm

Nonstop8h 05m

$512

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 11/17

7:45 pm-7:50 am

Nonstop7h 05m

London Heathrow

Mon 11/24

7:40 pm-3:40 pm

1 stop25h 00m

$521

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 1/14

6:35 pm-2:05 pm

2 stops14h 30m

London City

Wed 1/21

7:50 am-3:35 pm

1 stop12h 45m

$539

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Tue 12/2

7:55 pm-2:05 pm

1 stop13h 10m

London City

Thu 12/11

7:50 am-3:30 pm

1 stop12h 40m

$635

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Philadelphia to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to United Kingdom?

In general, September is the cheapest month to fly from Philadelphia to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $656. If you aren’t able to travel to United Kingdom during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $660.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Philadelphia to United Kingdom is on a Wednesday when prices can be found for as low as $776. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $984.

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

According to our data, the cheapest time of day to fly to United Kingdom is at noon. momondo users have found flights departing from Philadelphia to United Kingdom at noon for as low as $764. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the afternoon, with an average ticket price of $879. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Philadelphia to United Kingdom flight route?

Fly from Philadelphia to London Heathrow for the best Philadelphia - United Kingdom flight prices

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $821 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Philadelphia for as low as $720 on momondo.

What cabin class options are available on Philadelphia to United Kingdom flights?

There are 4 cabin classes available to choose from on Philadelphia to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to United Kingdom flights?

You could potentially save up to 21% on your flight if you consider stops on a Philadelphia to United Kingdom flight.

Cheap Philadelphia to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to United Kingdom

Best Price Found

$488

Fastest flight time

6h 50m

Direct flights

Every day

Airports in United Kingdom

2 airports
The best one-way flight to United Kingdom from Philadelphia in the past 72 hours is $488. The best round-trip flight deal from Philadelphia to United Kingdom found on momondo in the last 72 hours is $615.
The fastest flight from Philadelphia to United Kingdom takes 6h 50m
Direct flights go from Philadelphia to United Kingdom every day.
There are 2 airports near United Kingdom: London Heathrow (LHR), Edinburgh Turnhouse (EDI)
Search flight deals

  • When did momondo last update prices for flights from Philadelphia Airport to United Kingdom?

    Prices for flights from Philadelphia Airport to United Kingdom are updated daily.

  • How many operators does momondo search for flights from Philadelphia Airport to United Kingdom?

  • How old do you have to be to fly from Philadelphia Airport to United Kingdom?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents you'll need for your trip to United Kingdom may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at United Kingdom. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Philadelphia to United Kingdom?

Best airlines flying from Philadelphia to United Kingdom

Compare and see reviews for airlines that fly from Philadelphia to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $454Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
British AirwaysPriceFrom $511Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
American AirlinesPriceFrom $515Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
FinnairPriceFrom $516Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
Aer LingusPriceFrom $539Free CancellationRating
7.2
1,277 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $541Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
IberiaPriceFrom $601Free CancellationRating
7.0
2,925 reviews
Search Iberia flights
DeltaPriceFrom $623Free CancellationRating
7.9
7,961 reviews
Search Delta flights
LufthansaPriceFrom $649Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
United AirlinesPriceFrom $659Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Philadelphia to United Kingdom flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to United Kingdom that suits you.

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

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

How can momondo help me find flights from Philadelphia to United Kingdom?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Philadelphia to United Kingdom.

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

Yes. momondo can track prices for Philadelphia to United Kingdom flights 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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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
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