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Cheap flights from Philadelphia to London from £172

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 8/4. 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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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Philadelphia to London.
 Logo
17:35 - 06:55PHL-LGW
32h 20m1 stop
 Logo
10:00 - 00:26LGW-PHL
19h 26m1 stop
Tue, 29 Apr - Mon, 5 May
 Logo
17:35 - 06:55PHL-LGW
32h 20m1 stop
 Logo
10:00 - 00:26LGW-PHL
19h 26m1 stop
Thu, 1 May - Tue, 6 May
JetBlue Logo
15:00 - 09:35PHL-LGW
13h 35m1 stop
JetBlue Logo
12:10 - 22:22LGW-PHL
15h 12m1 stop
£422JetBlue
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Mon, 22 Sep - Fri, 26 Sep
JetBlue Logo
15:00 - 09:35PHL-LGW
13h 35m1 stop
JetBlue Logo
12:10 - 22:22LGW-PHL
15h 12m1 stop
£427JetBlue
Find Deal
Mon, 29 Sep - Mon, 6 Oct
Iberia Logo
19:50 - 08:05PHL-LHR
7h 15mdirect
Iberia Logo
13:30 - 16:25LHR-PHL
7h 55mdirect
£432Iberia
Find Deal
Sun, 10 Aug - Thu, 21 Aug
Iberia Logo
22:10 - 10:20PHL-LHR
7h 10mdirect
Iberia Logo
10:05 - 12:50LHR-PHL
7h 45mdirect
£436Iberia
Find Deal
Tue, 6 May - Wed, 21 May
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
Aer Lingus Logo
13:25 - 19:00LHR-PHL
10h 35m1 stop
£447Aer Lingus
Find Deal
Mon, 28 Apr - Wed, 7 May
British Airways Logo
16:00 - 10:40PHL-LGW
13h 40m1 stop
British Airways Logo
14:30 - 08:35LGW-PHL
23h 05m1 stop
£458British Airways
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Wed, 7 May - Tue, 13 May
British Airways Logo
15:30 - 10:40PHL-LGW
14h 10m1 stop
British Airways Logo
14:30 - 14:55LGW-PHL
29h 25m1 stop
£462British Airways
Find Deal
Tue, 30 Sep - Tue, 7 Oct
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
Aer Lingus Logo
12:00 - 19:00LHR-PHL
12h 00m1 stop
£494Aer Lingus
Find Deal
Sun, 27 Apr - Thu, 1 May

Iberia flights from Philadelphia to London

Our best Iberia deals on Philadelphia to London flight tickets
Iberia
10 Aug
PHL19:50Philadelphia
7h 15m
LHR08:05London Heathrow
21 Aug
LHR13:30London Heathrow
7h 55m
PHL16:25Philadelphia
Iberia
6 May
PHL22:10Philadelphia
7h 10m
LHR10:20London Heathrow
21 May
LHR10:05London Heathrow
7h 45m
PHL12:50Philadelphia
Iberia
28 Apr
PHL22:10Philadelphia
7h 10m
LHR10:20London Heathrow
7 May
LHR12:30London Heathrow
7h 45m
PHL15:15Philadelphia

Aer Lingus flights from Philadelphia to London

Our best Aer Lingus deals on Philadelphia to London flight tickets
Aer Lingus
28 Apr
PHL20:30Philadelphia
9h 40m
1 stop
LHR11:10London Heathrow
7 May
LHR13:25London Heathrow
10h 35m
1 stop
PHL19:00Philadelphia
Aer Lingus
15 Apr
PHL20:30Philadelphia
9h 40m
1 stop
LHR11:10London Heathrow
23 Apr
LHR13:25London Heathrow
10h 35m
1 stop
PHL19:00Philadelphia
Aer Lingus
27 Apr
PHL20:30Philadelphia
9h 40m
1 stop
LHR11:10London Heathrow
1 May
LHR12:00London Heathrow
12h 00m
1 stop
PHL19:00Philadelphia

See travel insights to London from

How to get the cheapest flight ticket from Philadelphia to London

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?

The cheapest month to fly to London from Philadelphia is in February. Flight prices, which tend to average around £510, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Philadelphia averaging around £529.

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

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £582. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to London for around £750.

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

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £508. Flights at midday are often more expensive, with an average ticket price of £754.

What is the cheapest Philadelphia to London flight route?

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

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

You are more likely to see cheaper flights to London from Philadelphia when booking 9 weeks ahead of your departure date. In general, you can expect to find flights to London for around £651 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Philadelphia for as low as £591 on momondo.

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

There are 3 cabin classes available to choose from on Philadelphia to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Philadelphia to London flight prices changed over time?

As of April 2025, prices for Philadelphia to London flights are approximately 1% more expensive when compared to flights at the same time last year.

When to book flights from Philadelphia to London

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

Cheap Philadelphia to London (PHL to LON) flight deals and tips

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

Best price found

£172

Fastest flight time

6h 55m

Direct flights

Every day

Airports in London

2 airports
The best one-way flight to London from Philadelphia in the past 72 hours is £172. The best return flight deal from Philadelphia to London found on momondo in the last 72 hours is £387.
The fastest flight from Philadelphia to London takes 6h 55m
Direct flights go from Philadelphia to London every day.
There are 2 airports near London: London Heathrow (LHR), London Gatwick (LGW)

  • How far is Philadelphia to London by plane?

    The distance between Philadelphia and London is about 3538.9 mi. A reasonable flight in good conditions will take 6h 55m.

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

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

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

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

    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.

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

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

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


Best airlines flying from Philadelphia to London

Compare and see reviews for airlines that fly from Philadelphia to London with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom £445Free CancellationRating
7.0
2,659 reviews
Search Iberia flights
JetBluePriceFrom £462Free CancellationRating
7.3
2,920 reviews
Search JetBlue flights
British AirwaysPriceFrom £467Free CancellationRating
6.6
6,718 reviews
Search British Airways flights
Aer LingusPriceFrom £505Free CancellationRating
7.0
1,059 reviews
Search Aer Lingus flights
  • Iberia Flights From Philadelphia to London

    The lowest priced Iberia flight from Philadelphia to London from the last 72 hours was £583. Generally, Iberia has 10 flights on this route every week with an average price of £772. Iberia is rated 7.0/10 by our users.

  • Aer Lingus Flights From Philadelphia to London

    £662 is the best Aer Lingus flight deal from Philadelphia to London found on momondo over the last 72 hours. The average Aer Lingus ticket price found was closer to £957, however, with flight time and availability significantly affecting the price. Aer Lingus (7.0/10 from 1,059 user reviews) flies into London from Philadelphia 4 times in an average week so prices can vary.


Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Southend-on-Sea
Gatwick
Ipswich
Maidstone
Canterbury
Margate
Dartford
Hounslow
Ilford
Colchester
Guildford
Winchester
Worthing
Croydon
Chichester
Crawley

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to London. momondo saves you time and could save you money on your trip.

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

Yes. All flights to London from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

Yes. momondo can track prices for Philadelphia to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London