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Cheap flights from Philadelphia to London from $301

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 London departing on 4/21. 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 London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:54 am - 12:30 am
PHL
-
STN
32h 36m
3 stops
Multiple Airlines Logo
5:55 am - 11:45 pm
STN
-
PHL
46h 50m
3 stops
$759Multiple Airlines
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
8:25 pm - 11:35 am
PHL
-
STN
10h 10m
1 stop
Multiple Airlines Logo
6:40 am - 6:55 pm
STN
-
PHL
17h 15m
2 stops
$788Multiple Airlines
Wed, Sep 30 - Tue, Oct 13
Multiple Airlines Logo
8:25 pm - 11:35 am
PHL
-
STN
10h 10m
1 stop
Multiple Airlines Logo
7:55 pm - 6:55 pm
STN
-
PHL
28h 00m
2 stops
$793Multiple Airlines
Wed, Sep 30 - Sat, Oct 10
Multiple Airlines Logo
7:30 am - 11:50 pm
PHL
-
STN
35h 20m
3 stops
Multiple Airlines Logo
3:55 pm - 11:32 pm
STN
-
PHL
36h 37m
3 stops
$798Multiple Airlines
Sun, May 3 - Tue, May 12
Multiple Airlines Logo
8:25 pm - 12:45 pm
PHL
-
STN
11h 20m
1 stop
Multiple Airlines Logo
6:40 am - 6:55 pm
STN
-
PHL
17h 15m
2 stops
$804Multiple Airlines
Tue, Sep 29 - Tue, Oct 13
Multiple Airlines Logo
8:00 am - 7:55 pm
PHL
-
STN
30h 55m
3 stops
Multiple Airlines Logo
7:35 am - 11:45 pm
STN
-
PHL
45h 10m
3 stops
$820Multiple Airlines
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
7:30 am - 12:30 am
PHL
-
STN
36h 00m
3 stops
Multiple Airlines Logo
6:00 am - 11:58 pm
STN
-
PHL
46h 58m
3 stops
$823Multiple Airlines
Thu, Apr 30 - Thu, May 7
Multiple Airlines Logo
8:25 pm - 12:50 pm
PHL
-
STN
11h 25m
1 stop
Multiple Airlines Logo
6:30 am - 6:55 pm
STN
-
PHL
17h 25m
1 stop
$831Multiple Airlines
Mon, Sep 14 - Wed, Sep 23
Multiple Airlines Logo
10:54 am - 12:30 am
PHL
-
STN
32h 36m
3 stops
Multiple Airlines Logo
5:55 am - 11:45 pm
STN
-
PHL
46h 50m
3 stops
$833Multiple Airlines
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
8:25 pm - 7:35 pm
PHL
-
STN
18h 10m
1 stop
Multiple Airlines Logo
6:30 am - 6:55 pm
STN
-
PHL
17h 25m
1 stop
$839Multiple Airlines
Tue, Sep 29 - Thu, Oct 8

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to London Stansted Airport 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 April 6, 2026.
Use the filters below to find and compare flights from Philadelphia to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Thu 4/30

10:54 am-12:30 am

3 stops32h 36m

London Stansted

Mon 5/4

5:55 am-11:45 pm

3 stops46h 50m

$759
Quickest round-trip

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 9/30

8:25 pm-11:35 am

1 stop10h 10m

London Stansted

Tue 10/13

6:40 am-6:55 pm

2 stops17h 15m

$788

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 9/30

8:25 pm-11:35 am

1 stop10h 10m

London Stansted

Sat 10/10

7:55 pm-6:55 pm

2 stops28h 00m

$793

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sun 5/3

7:30 am-11:50 pm

3 stops35h 20m

London Stansted

Tue 5/12

3:55 pm-11:32 pm

3 stops36h 37m

$798

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Tue 9/29

8:25 pm-12:45 pm

1 stop11h 20m

London Stansted

Tue 10/13

6:40 am-6:55 pm

2 stops17h 15m

$804

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sun 4/26

8:00 am-7:55 pm

3 stops30h 55m

London Stansted

Sun 5/3

7:35 am-11:45 pm

3 stops45h 10m

$820

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Thu 4/30

7:30 am-12:30 am

3 stops36h 00m

London Stansted

Thu 5/7

6:00 am-11:58 pm

3 stops46h 58m

$823

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 9/14

8:25 pm-12:50 pm

1 stop11h 25m

London Stansted

Wed 9/23

6:30 am-6:55 pm

1 stop17h 25m

$831

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Thu 4/30

10:54 am-12:30 am

3 stops32h 36m

London Stansted

Mon 5/4

5:55 am-11:45 pm

3 stops46h 50m

$833

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Tue 9/29

8:25 pm-7:35 pm

1 stop18h 10m

London Stansted

Thu 10/8

6:30 am-6:55 pm

1 stop17h 25m

$839

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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When to book flights from Philadelphia to London Stansted Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to London Stansted Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to London Stansted Airport (PHL to STN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to London Stansted Airport

Fastest flight time

9h 20m

Direct flights

None
The fastest flight from Philadelphia to London Stansted Airport takes 9h 20m
There are no direct flights from Philadelphia to London Stansted Airport. There are no popular flight routes from Philadelphia to London Stansted Airport.
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Frequently asked questions about flying from Philadelphia to London Stansted Airport

  • How far is Philadelphia to London Stansted by plane?

    London Stansted is 3545.2 mi away from Philadelphia. Flights usually cover this in 9h 20m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Philadelphia Airport to London Stansted Airport?

    Prices for flights from Philadelphia Airport to London Stansted Airport were last updated today.

  • How old do you have to be to fly from Philadelphia Airport to London Stansted Airport?

    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 London Stansted Airport.

  • What documentation or ID do you need to fly to London Stansted Airport?

    The travel and health documents required for your trip to London Stansted 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 London Stansted Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from Philadelphia to London Stansted Airport

  • How do I get Price Alerts for flights from Philadelphia to London Stansted Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Philadelphia from London Stansted Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Philadelphia to London Stansted Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Crawley
Hayes
Wembley
Stansted
Croydon
Dartford
Brentwood
Guildford
Cobham
Folkestone
Romford
Harrow
Watford
Richmond

Why use momondo?

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

It is quick and easy to find Philadelphia to London 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 London that suits you.

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

All flight searches from Philadelphia to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Philadelphia to London?

Once all potential Philadelphia to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Philadelphia to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Stansted Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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