Cheap flights from Philadelphia to London from £228
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 4/4. 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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Fly to
Route
Depart
Return
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 21/2
13:35-09:05
1 stop14h 30m
London Heathrow
Tue 2/3
17:15-07:52
1 stop19h 37m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 28/3
11:39-11:55
1 stop19h 16m
London Heathrow
Tue 30/3
09:30-00:37
2 stops20h 07m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 10/2
13:38-10:25
1 stop15h 47m
London Heathrow
Wed 24/2
17:15-08:04
1 stop19h 49m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 22/3
14:37-13:00
2 stops18h 23m
London Heathrow
Wed 24/3
11:10-15:50
1 stop32h 40m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 27/3
16:35-20:00
1 stop23h 25m
London Heathrow
Mon 29/3
19:10-16:00
2 stops25h 50m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 10/1
17:05-18:40
2 stops44h 35m
London Heathrow
Wed 13/1
06:50-14:44
2 stops12h 54m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 10/1
17:05-18:40
2 stops44h 35m
London Heathrow
Wed 13/1
06:50-14:44
2 stops12h 54m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 27/3
15:20-06:40
2 stops35h 20m
London Heathrow
Tue 30/3
07:30-16:00
1 stop13h 30m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 4/4
20:25-11:10
1 stop9h 45m
London Heathrow
Sat 24/4
08:45-18:55
2 stops15h 10m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 4/4
20:25-11:10
1 stop9h 45m
London Heathrow
Wed 21/4
08:45-18:55
2 stops15h 10m
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 typical price of a round-trip flight between Philadelphia and London?
Prices are currently low for flights on this route.
Typical prices usually range from £648 to £856.The lowest price recently found on this route was £613.
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 £556, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Philadelphia averaging around £569.
What is the cheapest day to depart on your flight to London?
Our data shows that Monday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £685. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to London for around £1,098.
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 afternoon when flights can be purchased for as low as £774. Flights in the evening are often more expensive, with an average ticket price of £811.
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 from Philadelphia to London?
You are more likely to see cheaper flights to London from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £781 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Philadelphia for as low as £706 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.
Can stopping save me money on Philadelphia to London flights?
You could potentially save up to 24% on your flight if you consider stops on a Philadelphia to London flight.
How have Philadelphia to London flight prices changed over time?
As of October 2026, prices for Philadelphia to London flights are approximately 11% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Philadelphia to London?
JetBlue and United Airlines are the most popular carriers operating from Philadelphia to London
Which airlines fly to London?
Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London from Philadelphia according to our data. Virgin Atlantic is the first choice among our users, with 37% of people opting to fly with this airline when travelling to London. Keep in mind that there are 14 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from Philadelphia to London on average per day?
As of October 2026, there are 8 flights per day flying from Philadelphia to London. The most common time of day flights depart is 18:00, with 100% of flights taking off in the evening.
How many flights depart from Philadelphia to London on average per week?
As of October 2026, 57 flights take off from Philadelphia and land in London each week. The most common flight departure day for this route is Sun, with 26% of weekly flights taking off on this day.
When to book flights from Philadelphia to London
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
Frequently asked questions about flying from Philadelphia to London
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 7h 00m.
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?
As of October 2026, there is 1 operator available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Philadelphia to London is Airbus A350-1000 (40.37% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (40.02%), Boeing 787 Dreamliner (4.68%), and Boeing 787-8 Dreamliner (4.26%).
What is the most popular airline from Philadelphia to London?
Based on momondo bookings for flights between Philadelphia and London, the leading airline is British Airways, making up 58% of the total bookings. Other popular airlines include American Airlines with 22% and Iberia with 19%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom £519 | Free Cancellation | Rating 6.7 8,244 reviews |
British Airways Flights From Philadelphia to London
The lowest priced British Airways flight from Philadelphia to London from the last 72 hours was £519. Generally, British Airways has 12 flights on this route every week with an average price of £813. British Airways is rated 6.7/10 by our users.
Travelling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy 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.