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
Mon 5/4
15:20-07:55
2 stops35h 35m
London Heathrow
Thu 8/4
06:50-16:00
2 stops14h 10m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 8/12
17:40-09:05
1 stop10h 25m
London Heathrow
Sat 12/12
08:05-16:10
2 stops37h 05m
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
Sun 4/4
20:25-11:10
1 stop9h 45m
London Heathrow
Wed 21/4
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
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
Tue 20/4
08:45-18:55
2 stops15h 10m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 28/3
20:25-11:10
1 stop9h 45m
London Heathrow
Wed 7/4
08:45-18:55
2 stops15h 10m
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 10/1
21:35-06:15
1 stop27h 40m
London Heathrow
Wed 13/1
06:15-15:50
1 stop14h 35m
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?
Prices are currently low for flights on this route.
Typical prices usually range from £714 to £1,036.The lowest price recently found on this route was £612.
What is the cheapest month to fly to London Heathrow Airport?
In general, February 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 £532. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Philadelphia averaging around £590.
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 Monday. momondo users have found tickets for Monday departures for as low as £685. 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 £1,097.
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 afternoon. momondo users have found flights departing from Philadelphia to London Heathrow Airport in the afternoon for as low as £773. 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 evening when prices are £811 on average. Flights to London Heathrow Airport from Philadelphia in the evening 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 from Philadelphia 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 £780 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 £705 on momondo.
What cabin class options are available on Philadelphia to London Heathrow Airport flights?
There are 3 cabin classes available to choose from on Philadelphia to London Heathrow Airport 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 21% 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 October 2026, prices for Philadelphia to London Heathrow Airport flights are approximately 13% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Philadelphia to London Heathrow?
JetBlue is the most popular carrier operating from Philadelphia to London Heathrow
Which airlines fly to London Heathrow Airport?
Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London Heathrow Airport 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 Heathrow Airport. Keep in mind that there are 13 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Philadelphia to London Heathrow Airport on average per day?
As of October 2026, there are 15 flights per day flying from Philadelphia to London Heathrow Airport. 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 Heathrow Airport on average per week?
As of October 2026, 105 flights take off from Philadelphia and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
When to book flights from Philadelphia to London Heathrow Airport
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
Frequently asked questions about flying from Philadelphia to London Heathrow Airport
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?
The number of operators available for flights from Philadelphia Airport to London Heathrow Airport is 1 as of October 2026.
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?
momondo data reveals that the most frequently booked plane model on the route from Philadelphia to London Heathrow Airport is Airbus A350-1000, representing 40.37% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 40.02%, Boeing 787 Dreamliner at 4.68%, and Boeing 787-8 Dreamliner at 4.26%.
What is the most popular airline from Philadelphia to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Philadelphia to London Heathrow Airport is British Airways (100% of total bookings).
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 | ||
|---|---|---|---|---|---|
| PriceFrom £518 | Free Cancellation | Rating 6.7 8,256 reviews |
British Airways Flights From Philadelphia to London Heathrow Airport
British Airways flies from Philadelphia to London Heathrow Airport around 21 times per week, with 8,256 momondo users rating the airline 6.7/10. The cheapest British Airways deal from Philadelphia to London Heathrow Airport in the last 72 hours was £518 (round-trip), much lower than the average airfare cost of £812 for British Airways flights on this route.
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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.