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Cheap flights from Philadelphia to London from £185

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 12/1. 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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Cheap return flights

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Scandinavian Airlines Logo
06:02 - 16:00
PHL
-
LHR
28h 58m2 stops
Scandinavian Airlines Logo
06:40 - 21:13
LHR
-
PHL
19h 33m2 stops
£451Scandinavian Airlines
週日, 18 1月 - 週二, 24 2月
Scandinavian Airlines Logo
06:00 - 09:20
PHL
-
LHR
22h 20m2 stops
Scandinavian Airlines Logo
19:50 - 21:23
LHR
-
PHL
29h 33m3 stops
£454Scandinavian Airlines
週一, 2 3月 - 週一, 9 3月
Scandinavian Airlines Logo
11:30 - 21:40
PHL
-
LHR
29h 10m2 stops
Scandinavian Airlines Logo
21:05 - 21:16
LHR
-
PHL
29h 11m3 stops
£456Scandinavian Airlines
週四, 15 1月 - 週一, 19 1月
Scandinavian Airlines Logo
11:08 - 14:35
PHL
-
LHR
22h 27m3 stops
Scandinavian Airlines Logo
07:05 - 21:23
LHR
-
PHL
18h 18m3 stops
£457Scandinavian Airlines
週二, 3 3月 - 週二, 10 3月
JetBlue Logo
08:40 - 06:55
PHL
-
LHR
17h 15m1 stop
JetBlue Logo
09:20 - 18:23
LHR
-
PHL
14h 03m1 stop
£459JetBlue
週三, 21 1月 - 週三, 28 1月
United Airlines Logo
13:10 - 05:55
PHL
-
LHR
11h 45m1 stop
United Airlines Logo
13:35 - 14:31
LHR
-
PHL
29h 56m1 stop
£459United Airlines
週三, 7 1月 - 週五, 16 1月
JetBlue Logo
13:30 - 06:55
PHL
-
LHR
12h 25m1 stop
JetBlue Logo
09:20 - 22:45
LHR
-
PHL
18h 25m1 stop
£460JetBlue
週五, 30 1月 - 週二, 17 2月
Scandinavian Airlines Logo
13:24 - 18:30
PHL
-
LHR
24h 06m2 stops
Scandinavian Airlines Logo
06:40 - 00:25
LHR
-
PHL
22h 45m2 stops
£463Scandinavian Airlines
週日, 3 5月 - 週六, 9 5月
Scandinavian Airlines Logo
12:16 - 16:00
PHL
-
LHR
22h 44m2 stops
Scandinavian Airlines Logo
06:40 - 21:13
LHR
-
PHL
19h 33m2 stops
£466Scandinavian Airlines
週五, 30 1月 - 週二, 17 2月
Air Canada Logo
15:30 - 07:10
PHL
-
LHR
10h 40m1 stop
Air Canada Logo
09:00 - 22:46
LHR
-
PHL
18h 46m2 stops
£467Air Canada
週二, 6 1月 - 週三, 14 1月

Scandinavian Airlines flights from Philadelphia to London Heathrow Airport

Our best Scandinavian Airlines deals on Philadelphia to London Heathrow Airport flight tickets
Scandinavian Airlines
18 Jan
PHL06:02Philadelphia
28h 58m
2 stops
LHR16:00London Heathrow
24 Feb
LHR06:40London Heathrow
19h 33m
2 stops
PHL21:13Philadelphia
£451
Find similar
Scandinavian Airlines
10 Mar
PHL11:16Philadelphia
25h 09m
3 stops
LHR16:25London Heathrow
19 Mar
LHR06:40London Heathrow
22h 09m
2 stops
PHL00:49Philadelphia
£454
Find similar
Scandinavian Airlines
15 Jan
PHL06:02Philadelphia
28h 58m
2 stops
LHR16:00London Heathrow
19 Jan
LHR21:05London Heathrow
29h 11m
3 stops
PHL21:16Philadelphia
£456
Find similar

JetBlue flights from Philadelphia to London Heathrow Airport

Our best JetBlue deals on Philadelphia to London Heathrow Airport flight tickets
JetBlue
30 Jan
PHL13:30Philadelphia
12h 25m
1 stop
LHR06:55London Heathrow
17 Feb
LHR09:20London Heathrow
18h 25m
1 stop
PHL22:45Philadelphia
£460
Find similar
JetBlue
12 Jan
PHL13:30Philadelphia
12h 25m
1 stop
LHR06:55London Heathrow
20 Jan
LHR09:20London Heathrow
14h 03m
1 stop
PHL18:23Philadelphia
£468
Find similar
JetBlue
11 Jan
PHL08:40Philadelphia
17h 15m
1 stop
LHR06:55London Heathrow
20 Jan
LHR09:20London Heathrow
14h 03m
1 stop
PHL18:23Philadelphia
£472
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Philadelphia to London Heathrow 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 279,928 searches. Data last updated 10 12月 2025.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週日 18/1

06:02-16:00

2 stops28h 58m

London Heathrow

週二 24/2

06:40-21:13

2 stops19h 33m

£451

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週一 2/3

06:00-09:20

2 stops22h 20m

London Heathrow

週一 9/3

19:50-21:23

3 stops29h 33m

£454

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週四 15/1

11:30-21:40

2 stops29h 10m

London Heathrow

週一 19/1

21:05-21:16

3 stops29h 11m

£456

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週二 3/3

11:08-14:35

3 stops22h 27m

London Heathrow

週二 10/3

07:05-21:23

3 stops18h 18m

£457

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週三 21/1

08:40-06:55

1 stop17h 15m

London Heathrow

週三 28/1

09:20-18:23

1 stop14h 03m

£459

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週三 7/1

13:10-05:55

1 stop11h 45m

London Heathrow

週五 16/1

13:35-14:31

1 stop29h 56m

£459

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週五 30/1

13:30-06:55

1 stop12h 25m

London Heathrow

週二 17/2

09:20-22:45

1 stop18h 25m

£460

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週日 3/5

13:24-18:30

2 stops24h 06m

London Heathrow

週六 9/5

06:40-00:25

2 stops22h 45m

£463

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週五 30/1

12:16-16:00

2 stops22h 44m

London Heathrow

週二 17/2

06:40-21:13

2 stops19h 33m

£466

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

週二 6/1

15:30-07:10

1 stop10h 40m

London Heathrow

週三 14/1

09:00-22:46

2 stops18h 46m

£467

Flights are sorted by cheapest return flights first.

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

How to get the cheapest flight ticket from Philadelphia to London Heathrow Airport

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 London Heathrow Airport?

In general, September is the cheapest month to fly from Philadelphia to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £493. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Philadelphia averaging around £497.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Philadelphia is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £504. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £740.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Philadelphia to London Heathrow Airport at midday for as low as £544. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £615 on average. Flights to London Heathrow Airport from Philadelphia in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Philadelphia to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £615 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Philadelphia for as low as £512 on momondo.

What cabin class options are available on Philadelphia to London Heathrow flights?

There are 3 cabin classes available to choose from on Philadelphia to London Heathrow 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 London Heathrow Airport flights?

You could potentially save up to 61% on your flight if you consider stops on a Philadelphia to London Heathrow Airport flight.

How have Philadelphia to London Heathrow Airport flight prices changed over time?

As of December 2025, prices for Philadelphia to London Heathrow Airport flights are approximately 18% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to London Heathrow Airport

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

Cheap Philadelphia to London Heathrow Airport (PHL to LHR) flight deals and tips

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

Best price found

£656

Fastest flight time

6h 59m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Philadelphia in the past 72 hours is £656. The best return flight deal from Philadelphia to London Heathrow Airport found on momondo in the last 72 hours is £385.
The fastest flight from Philadelphia to London Heathrow Airport takes 6h 59m
Direct flights go from Philadelphia to London Heathrow Airport every day.
Search flight deals

  • How far is Philadelphia to London Heathrow by plane?

    The distance between Philadelphia and London Heathrow is about 3526.0 mi. In terms of flight time, this usually takes a little over 10h 00m.

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

    Prices for flights from Philadelphia Airport to London Heathrow Airport are updated daily.

  • How many operators does momondo search for flights from Philadelphia Airport to London Heathrow Airport?

  • How old do you have to be to fly from Philadelphia Airport to London Heathrow 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 Heathrow Airport.

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

    The travel and health documents you'll need for your trip to London Heathrow Airport 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 London Heathrow Airport. 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 London Heathrow Airport?

  • What is the most popular airline from Philadelphia to London Heathrow Airport?

Best airlines flying from Philadelphia to London Heathrow Airport

Compare and see reviews for airlines that fly from Philadelphia to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £387Free CancellationRating
6.7
7,573 reviews
Search British Airways flights
Aer LingusPriceFrom £394Free CancellationRating
7.2
1,391 reviews
Search Aer Lingus flights
JetBluePriceFrom £430Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
American AirlinesPriceFrom £513Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights

  • Aer Lingus Flights From Philadelphia to London Heathrow Airport

    Aer Lingus flies from Philadelphia to London Heathrow Airport around 7 times per week, with 1,391 momondo users rating the airline 7.2/10. The cheapest Aer Lingus deal from Philadelphia to London Heathrow Airport in the last 72 hours was £394 (round-trip), much lower than the average airfare cost of £696 for Aer Lingus flights on this route.

  • American Airlines Flights From Philadelphia to London Heathrow Airport

    The best American Airlines deal for Philadelphia to London Heathrow Airport flight tickets found on momondo in the last 72 hours was £513, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at £669 round-trip. American Airlines operates 14 flights out of Philadelphia into London Heathrow Airport in an average week, so prices vary by time and availability. 11,048 American Airlines reviews by users on momondo have scored the airline at 7.2/10.

Travelling to a place near London?

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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?

Flights from Philadelphia to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Philadelphia and alert you when they change.

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週五 9/1
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