Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Philadelphia to London from £190

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 15/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Philadelphia to London

Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
15:30 - 07:10
PHL
-
LHR
10h 40m
1 stop
Air Canada Logo
06:50 - 14:47
LHR
-
PHL
12h 57m
2 stops
£433Air Canada
Mon, 9 Feb - Tue, 3 Mar
British Airways Logo
18:35 - 11:35
PHL
-
LHR
12h 00m
1 stop
British Airways Logo
20:45 - 13:55
LHR
-
PHL
22h 10m
1 stop
£435British Airways
Mon, 9 Feb - Mon, 2 Mar
Air Canada Logo
15:30 - 11:20
PHL
-
LHR
14h 50m
2 stops
Air Canada Logo
09:00 - 22:46
LHR
-
PHL
17h 46m
2 stops
£437Air Canada
Tue, 3 Mar - Tue, 10 Mar
Air Canada Logo
07:50 - 07:10
PHL
-
LHR
18h 20m
2 stops
Air Canada Logo
06:50 - 14:47
LHR
-
PHL
12h 57m
2 stops
£439Air Canada
Wed, 4 Feb - Wed, 25 Feb
Air Canada Logo
13:10 - 08:30
PHL
-
LHR
14h 20m
2 stops
Air Canada Logo
06:50 - 14:47
LHR
-
PHL
12h 57m
2 stops
£440Air Canada
Mon, 9 Feb - Tue, 3 Mar
United Airlines Logo
15:30 - 07:10
PHL
-
LHR
10h 40m
1 stop
United Airlines Logo
15:00 - 14:47
LHR
-
PHL
28h 47m
1 stop
£440United Airlines
Tue, 10 Feb - Fri, 20 Feb
British Airways Logo
19:50 - 07:50
PHL
-
LHR
7h 00mdirect
British Airways Logo
18:45 - 15:25
LHR
-
PHL
25h 40m
1 stop
£442British Airways
Tue, 10 Feb - Mon, 16 Feb
JetBlue Logo
06:00 - 06:55
PHL
-
LHR
19h 55m
1 stop
JetBlue Logo
09:20 - 22:36
LHR
-
PHL
18h 16m
1 stop
£443JetBlue
Sun, 15 Feb - Tue, 24 Feb
Air Canada Logo
15:30 - 08:35
PHL
-
LHR
12h 05m
2 stops
Air Canada Logo
17:15 - 22:43
LHR
-
PHL
34h 28m
2 stops
£443Air Canada
Wed, 1 Apr - Wed, 8 Apr
United Airlines Logo
15:30 - 10:00
PHL
-
LHR
13h 30m
1 stop
United Airlines Logo
12:05 - 12:14
LHR
-
PHL
29h 09m
2 stops
£445United Airlines
Wed, 15 Apr - Wed, 29 Apr

Aer Lingus flights from Philadelphia to London Heathrow Airport

Our best Aer Lingus deals on Philadelphia to London Heathrow Airport flight tickets
Aer Lingus
5 Mar
PHL17:30Philadelphia
9h 35m
1 stop
LHR08:05London Heathrow
10 Mar
LHR08:50London Heathrow
12h 10m
1 stop
PHL17:00Philadelphia
£452
Aer Lingus
18 Mar
PHL18:30Philadelphia
10h 35m
1 stop
LHR09:05London Heathrow
24 Mar
LHR08:50London Heathrow
12h 10m
1 stop
PHL17:00Philadelphia
£462

JetBlue flights from Philadelphia to London Heathrow Airport

Our best JetBlue deals on Philadelphia to London Heathrow Airport flight tickets
JetBlue
15 Feb
PHL06:00Philadelphia
19h 55m
1 stop
LHR06:55London Heathrow
24 Feb
LHR09:20London Heathrow
18h 16m
1 stop
PHL22:36Philadelphia
£443
JetBlue
15 Feb
PHL06:00Philadelphia
19h 55m
1 stop
LHR06:55London Heathrow
24 Feb
LHR09:20London Heathrow
18h 16m
1 stop
PHL22:36Philadelphia
£447
JetBlue
4 Mar
PHL15:02Philadelphia
10h 53m
1 stop
LHR06:55London Heathrow
18 Mar
LHR09:20London Heathrow
14h 04m
1 stop
PHL19:24Philadelphia
£469

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 25 January 2026.
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

Mon 9/2

15:30-07:10

1 stop10h 40m

London Heathrow

Tue 3/3

06:50-14:47

2 stops12h 57m

£433

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/2

18:35-11:35

1 stop12h 00m

London Heathrow

Mon 2/3

20:45-13:55

1 stop22h 10m

£435

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/3

15:30-11:20

2 stops14h 50m

London Heathrow

Tue 10/3

09:00-22:46

2 stops17h 46m

£437

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 4/2

07:50-07:10

2 stops18h 20m

London Heathrow

Wed 25/2

06:50-14:47

2 stops12h 57m

£439

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/2

13:10-08:30

2 stops14h 20m

London Heathrow

Tue 3/3

06:50-14:47

2 stops12h 57m

£440

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 10/2

15:30-07:10

1 stop10h 40m

London Heathrow

Fri 20/2

15:00-14:47

1 stop28h 47m

£440

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 10/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Mon 16/2

18:45-15:25

1 stop25h 40m

£442

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 15/2

06:00-06:55

1 stop19h 55m

London Heathrow

Tue 24/2

09:20-22:36

1 stop18h 16m

£443

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 1/4

15:30-08:35

2 stops12h 05m

London Heathrow

Wed 8/4

17:15-22:43

2 stops34h 28m

£443

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/4

15:30-10:00

1 stop13h 30m

London Heathrow

Wed 29/4

12:05-12:14

2 stops29h 09m

£445

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between Philadelphia and London Heathrow Airport?

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 £481. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Philadelphia averaging around £486.

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 £489. 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 £727.

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 in the evening. momondo users have found flights departing from Philadelphia to London Heathrow Airport in the evening for as low as £558. 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 afternoon when prices are £569 on average. Flights to London Heathrow Airport from Philadelphia in the afternoon 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 £604 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 £502 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?

No. A direct flight is the cheapest option for a flight between Philadelphia to London Heathrow Airport.

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

As of January 2026, prices for Philadelphia to London Heathrow Airport flights are approximately 0% 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

£273

Fastest flight time

7h 00m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Philadelphia in the past 72 hours is £273. The best return flight deal from Philadelphia to London Heathrow Airport found on momondo in the last 72 hours is £446.
The fastest flight from Philadelphia to London Heathrow Airport takes 7h 00m
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 7h 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 £378Free CancellationRating
6.7
7,699 reviews
Search British Airways flights
Aer LingusPriceFrom £385Free CancellationRating
7.2
1,442 reviews
Search Aer Lingus flights
JetBluePriceFrom £419Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
American AirlinesPriceFrom £501Free CancellationRating
7.2
11,192 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 1,442 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 £385 (round-trip), much lower than the average airfare cost of £520 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 £501, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at £653 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. 11,192 American Airlines reviews by users on momondo have scored the airline at 7.2/10.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Stratford-upon-Avon
Swindon
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Chelmsford
Hayes
Swanage
Dover
Folkestone

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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 24/2
Tue 3/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London