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Cheap flights from Philadelphia to London from £184

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 28/11. 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
11:22 - 17:40PHL-LHR
25h 18m2 stops
Scandinavian Airlines Logo
06:40 - 21:16LHR-PHL
19h 36m2 stops
£455Scandinavian Airlines
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Tue, 27 Jan - Mon, 9 Feb
Scandinavian Airlines Logo
06:02 - 09:20PHL-LHR
22h 18m2 stops
Scandinavian Airlines Logo
07:05 - 21:16LHR-PHL
19h 11m3 stops
£458Scandinavian Airlines
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Tue, 27 Jan - Mon, 9 Feb
Aer Lingus Logo
17:30 - 10:10PHL-LHR
11h 40m1 stop
Aer Lingus Logo
08:50 - 16:00LHR-PHL
12h 10m1 stop
£458Aer Lingus
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Mon, 1 Dec - Fri, 5 Dec
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
British Airways Logo
06:30 - 14:05LHR-PHL
12h 35m1 stop
£459British Airways
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Sun, 11 Jan - Fri, 23 Jan
Multiple Airlines Logo
15:30 - 20:35PHL-LHR
24h 05m2 stops
Multiple Airlines Logo
08:30 - 16:05LHR-PHL
12h 35m1 stop
£462Multiple Airlines
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Tue, 2 Dec - Tue, 9 Dec
American Airlines Logo
19:45 - 07:50PHL-LHR
7h 05mdirect
American Airlines Logo
07:50 - 14:55LHR-PHL
11h 05m1 stop
£463American Airlines
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Tue, 3 Mar - Tue, 10 Mar
Air Canada Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
Air Canada Logo
06:50 - 14:47LHR-PHL
12h 57m2 stops
£465Air Canada
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Wed, 14 Jan - Thu, 22 Jan
American Airlines Logo
16:45 - 07:00PHL-LHR
9h 15m1 stop
American Airlines Logo
07:50 - 14:05LHR-PHL
11h 15m1 stop
£466American Airlines
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Wed, 7 Jan - Thu, 15 Jan
Air Canada Logo
16:35 - 06:30PHL-LHR
32h 55m1 stop
Air Canada Logo
06:50 - 14:47LHR-PHL
12h 57m2 stops
£469Air Canada
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Tue, 6 Jan - Tue, 13 Jan
Air Canada Logo
15:30 - 20:35PHL-LHR
24h 05m2 stops
Air Canada Logo
09:00 - 22:46LHR-PHL
18h 46m2 stops
£470Air Canada
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Tue, 6 Jan - Tue, 13 Jan

Iberia flights from Philadelphia to London Heathrow Airport

Our best Iberia deals on Philadelphia to London Heathrow Airport flight tickets
Iberia
11 Feb
PHL19:50Philadelphia
7h 00m
LHR07:50London Heathrow
25 Feb
LHR13:10London Heathrow
8h 05m
PHL16:15Philadelphia
£475
Find similar
Iberia
2 Dec
PHL19:45Philadelphia
7h 05m
LHR07:50London Heathrow
9 Dec
LHR10:05London Heathrow
8h 00m
PHL13:05Philadelphia
£481
Find similar
Iberia
7 Jan
PHL16:45Philadelphia
9h 15m
1 stop
LHR07:00London Heathrow
15 Jan
LHR10:15London Heathrow
8h 15m
PHL13:30Philadelphia
£484
Find similar

Delta flights from Philadelphia to London Heathrow Airport

Our best Delta deals on Philadelphia to London Heathrow Airport flight tickets
Delta
2 Dec
PHL09:40Philadelphia
16h 25m
2 stops
LHR07:05London Heathrow
9 Dec
LHR06:30London Heathrow
15h 02m
2 stops
PHL16:32Philadelphia
£474
Find similar
Delta
7 Jan
PHL10:30Philadelphia
17h 15m
2 stops
LHR08:45London Heathrow
13 Jan
LHR06:30London Heathrow
14h 58m
2 stops
PHL16:28Philadelphia
£480
Find similar
Delta
24 Nov
PHL17:24Philadelphia
10h 21m
1 stop
LHR08:45London Heathrow
2 Dec
LHR09:40London Heathrow
12h 16m
1 stop
PHL16:56Philadelphia
£492
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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 19 November 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

Tue 27/1

11:22-17:40

2 stops25h 18m

London Heathrow

Mon 9/2

06:40-21:16

2 stops19h 36m

£455

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 27/1

06:02-09:20

2 stops22h 18m

London Heathrow

Mon 9/2

07:05-21:16

3 stops19h 11m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 1/12

17:30-10:10

1 stop11h 40m

London Heathrow

Fri 5/12

08:50-16:00

1 stop12h 10m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 11/1

18:35-06:35

Nonstop7h 00m

London Heathrow

Fri 23/1

06:30-14:05

1 stop12h 35m

£459

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 2/12

15:30-20:35

2 stops24h 05m

London Heathrow

Tue 9/12

08:30-16:05

1 stop12h 35m

£462

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/3

19:45-07:50

Nonstop7h 05m

London Heathrow

Tue 10/3

07:50-14:55

1 stop11h 05m

£463

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 14/1

15:30-07:10

1 stop10h 40m

London Heathrow

Thu 22/1

06:50-14:47

2 stops12h 57m

£465

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/1

16:45-07:00

1 stop9h 15m

London Heathrow

Thu 15/1

07:50-14:05

1 stop11h 15m

£466

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/1

16:35-06:30

1 stop32h 55m

London Heathrow

Tue 13/1

06:50-14:47

2 stops12h 57m

£469

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/1

15:30-20:35

2 stops24h 05m

London Heathrow

Tue 13/1

09:00-22:46

2 stops18h 46m

£470

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 £500. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Philadelphia averaging around £505.

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 £520. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £753.

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 £551. 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 £623 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 £618 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 £529 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 59% 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 November 2025, prices for Philadelphia to London Heathrow Airport flights are approximately 8% 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

£642

Fastest flight time

6h 59m

Direct flights

Every day
The best flight deal from Philadelphia to London Heathrow Airport found on momondo in the last 72 hours is £642
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 6h 59m.

  • 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 £392Free CancellationRating
6.7
7,529 reviews
Search British Airways flights
Aer LingusPriceFrom £399Free CancellationRating
7.2
1,373 reviews
Search Aer Lingus flights
JetBluePriceFrom £435Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
IberiaPriceFrom £471Free CancellationRating
7.0
3,023 reviews
Search Iberia flights
American AirlinesPriceFrom £520Free 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 1,376 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 £399 (round-trip), much lower than the average airfare cost of £705 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 £520, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at £678 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. 11,044 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.

An easier way to manage your London Heathrow Airport trip

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