Cheap flights from Philadelphia to London from $233

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 7/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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.

Find the cheapest flights from Philadelphia to London

Cheap round-trip flights

Virgin Atlantic Logo
7:33 pm - 1:30 pmPHL-LHR
12h 57m1 stop
Virgin Atlantic Logo
6:15 am - 7:10 pmLHR-PHL
17h 55m2 stops
$444Virgin Atlantic
Find Deal
Sun, Aug 3 - Tue, Aug 12
Virgin Atlantic Logo
6:27 pm - 1:30 pmPHL-LHR
14h 03m1 stop
Virgin Atlantic Logo
3:15 pm - 12:56 amLHR-PHL
14h 41m1 stop
$447Virgin Atlantic
Find Deal
Sun, Aug 3 - Tue, Aug 12
Aer Lingus Logo
5:30 pm - 9:05 amPHL-LHR
10h 35m1 stop
Aer Lingus Logo
9:50 am - 4:00 pmLHR-PHL
11h 10m1 stop
$472Aer Lingus
Find Deal
Tue, Nov 18 - Tue, Nov 25
Aer Lingus Logo
6:30 pm - 10:10 amPHL-LHR
11h 40m1 stop
Aer Lingus Logo
8:50 am - 4:00 pmLHR-PHL
12h 10m1 stop
$477Aer Lingus
Find Deal
Wed, Oct 29 - Fri, Nov 7
British Airways Logo
6:30 pm - 6:40 amPHL-LHR
7h 10mnonstop
British Airways Logo
6:30 am - 1:55 pmLHR-PHL
12h 25m1 stop
$478British Airways
Find Deal
Tue, Oct 7 - Wed, Nov 12
British Airways Logo
3:35 pm - 5:55 amPHL-LHR
9h 20m1 stop
British Airways Logo
6:30 am - 1:55 pmLHR-PHL
12h 25m1 stop
$480British Airways
Find Deal
Wed, Nov 26 - Wed, Dec 3
American Airlines Logo
7:40 pm - 6:35 amPHL-LHR
6h 55mnonstop
American Airlines Logo
7:50 am - 1:55 pmLHR-PHL
11h 05m1 stop
$486American Airlines
Find Deal
Wed, Oct 29 - Fri, Nov 7
American Airlines Logo
7:50 pm - 8:05 amPHL-LHR
7h 15mnonstop
American Airlines Logo
8:45 am - 4:45 pmLHR-PHL
13h 00m1 stop
$494American Airlines
Find Deal
Sun, Aug 17 - Wed, Aug 27
Iberia Logo
10:25 pm - 10:30 amPHL-LHR
7h 05mnonstop
Iberia Logo
12:30 pm - 3:35 pmLHR-PHL
8h 05mnonstop
$515Iberia
Find Deal
Sun, Aug 3 - Tue, Aug 12
Iberia Logo
1:50 pm - 7:50 amPHL-LHR
13h 00m1 stop
Iberia Logo
10:05 am - 1:10 pmLHR-PHL
8h 05mnonstop
$523Iberia
Find Deal
Sun, Aug 3 - Thu, Aug 14

British Airways flights from Philadelphia to London Heathrow Airport

Our best British Airways deals on Philadelphia to London Heathrow Airport flight tickets
British Airways
Oct 7
PHL6:30 pmPhiladelphia
7h 10m
LHR6:40 amLondon Heathrow
Nov 12
LHR6:30 amLondon Heathrow
12h 25m
1 stop
PHL1:55 pmPhiladelphia
British Airways
Nov 26
PHL3:35 pmPhiladelphia
9h 20m
1 stop
LHR5:55 amLondon Heathrow
Dec 3
LHR6:30 amLondon Heathrow
12h 25m
1 stop
PHL1:55 pmPhiladelphia
British Airways
Aug 3
PHL6:35 pmPhiladelphia
7h 05m
LHR6:40 amLondon Heathrow
Aug 12
LHR1:30 pmLondon Heathrow
7h 55m
PHL4:25 pmPhiladelphia

Iberia flights from Philadelphia to London Heathrow Airport

Our best Iberia deals on Philadelphia to London Heathrow Airport flight tickets
Iberia
Aug 3
PHL10:25 pmPhiladelphia
7h 05m
LHR10:30 amLondon Heathrow
Aug 12
LHR12:30 pmLondon Heathrow
8h 05m
PHL3:35 pmPhiladelphia
Iberia
Aug 3
PHL1:50 pmPhiladelphia
13h 00m
1 stop
LHR7:50 amLondon Heathrow
Aug 14
LHR10:05 amLondon Heathrow
8h 05m
PHL1:10 pmPhiladelphia
Iberia
Jul 15
PHL10:25 pmPhiladelphia
7h 05m
LHR10:30 amLondon Heathrow
Sep 7
LHR10:05 amLondon Heathrow
8h 00m
PHL1:05 pmPhiladelphia

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?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Philadelphia, with most prices found around $717. If you’re not able to fly to London Heathrow Airport in October, then January is your next best option. Flight prices from Philadelphia to London Heathrow Airport during January average around $721.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $797. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $984.

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 noon. momondo users have found flights departing from Philadelphia to London Heathrow Airport at noon for as low as $802. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $885.

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 $841 when searching weeks out. 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 $714 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 4% 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 July 2025, prices for Philadelphia to London Heathrow Airport flights are approximately 5% more expensive 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 round-trip 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

$233

Fastest flight time

6h 55m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Philadelphia in the past 72 hours is $233. The best round-trip flight deal from Philadelphia to London Heathrow Airport found on momondo in the last 72 hours is $444.
The fastest flight from Philadelphia to London Heathrow Airport takes 6h 55m
Direct flights go from Philadelphia to London Heathrow Airport every day.

  • How far is Philadelphia to London Heathrow by plane?

    Philadelphia and London Heathrow are 3526.0 mi apart from one another. Flights usually cover this in 6h 55m, depending on flying conditions and air traffic around both airports.

  • 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 refresh 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 required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable 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
JetBluePriceFrom $547Free CancellationRating
7.3
2,910 reviews
Search JetBlue flights
Aer LingusPriceFrom $580Free CancellationRating
7.1
1,152 reviews
Search Aer Lingus flights
IberiaPriceFrom $610Free CancellationRating
7.0
2,826 reviews
Search Iberia flights
British AirwaysPriceFrom $613Free CancellationRating
6.6
7,109 reviews
Search British Airways flights
American AirlinesPriceFrom $630Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
FinnairPriceFrom $635Free CancellationRating
7.6
1,312 reviews
Search Finnair flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
  • Finnair Flights From Philadelphia to London Heathrow Airport

    Finnair flies from Philadelphia to London Heathrow Airport around 21 times per week, with 1,312 momondo users rating the airline 7.6/10. The cheapest Finnair deal from Philadelphia to London Heathrow Airport in the last 72 hours was $635 (round-trip), much lower than the average airfare cost of $791 for Finnair 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 $630, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $872 round-trip. American Airlines operates 21 flights out of Philadelphia into London Heathrow Airport in an average week, so prices vary by time and availability. 10,000 American Airlines reviews by users on momondo have scored the airline at 7.2/10.


Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Croydon
Luton
Slough
Dover
Dartford
Guildford
Stansted
Hayes
Milton Keynes
Salisbury
Swindon
Ilford
Colchester
Stratford-upon-Avon
Chelmsford
Canterbury
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?

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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Philadelphia.

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 Heathrow 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 7/15
Tue 7/22

Find better results for your trip to London

Popular cities in the United Kingdom

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