S$505 Cheap Flights from Philadelphia to London

View S$505 flight on Sun, 3 Aug, 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR)

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Cheap Flights from Philadelphia to London (PHL-LHR)

Prices were available within the past 7 days and start at S$505 for one-way flights and S$670 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 30 Dec - Fri, 9 Jan
PHL
Philadelphia
LHR
London
S$670 Return, found 2 days ago
S$670
Return
found 2 days ago
Select Delta flight, departing Tue, 30 Dec from Philadelphia to London, returning Fri, 9 Jan, priced at S$670 found 2 days ago
British Airways
Sun, 3 Aug - Tue, 12 Aug
PHL
Philadelphia
LHR
London
S$698 Return, found 6 days ago
S$698
Return
found 6 days ago
Select British Airways flight, departing Sun, 3 Aug from Philadelphia to London, returning Tue, 12 Aug, priced at S$698 found 6 days ago
Air France
Mon, 29 Dec - Fri, 9 Jan
PHL
Philadelphia
LHR
London
S$727 Return, found 2 days ago
S$727
Return
found 2 days ago
Select Air France flight, departing Mon, 29 Dec from Philadelphia to London, returning Fri, 9 Jan, priced at S$727 found 2 days ago
KLM
Mon, 29 Dec - Fri, 9 Jan
PHL
Philadelphia
LHR
London
S$736 Return, found 2 days ago
S$736
Return
found 2 days ago
Select KLM flight, departing Mon, 29 Dec from Philadelphia to London, returning Fri, 9 Jan, priced at S$736 found 2 days ago
KLM
Wed, 31 Dec - Fri, 9 Jan
PHL
Philadelphia
LHR
London
S$777 Return, found 2 days ago
S$777
Return
found 2 days ago
Select KLM flight, departing Wed, 31 Dec from Philadelphia to London, returning Fri, 9 Jan, priced at S$777 found 2 days ago
British Airways
Mon, 15 Sep - Wed, 24 Sep
PHL
Philadelphia
LHR
London
S$814 Return, found 15 hours ago
S$814
Return
found 15 hours ago
Select British Airways flight, departing Mon, 15 Sep from Philadelphia to London, returning Wed, 24 Sep, priced at S$814 found 15 hours ago
Virgin Atlantic
Mon, 15 Sep - Wed, 24 Sep
PHL
Philadelphia
LHR
London
S$862 Return, found 15 hours ago
S$862
Return
found 15 hours ago
Select Virgin Atlantic flight, departing Mon, 15 Sep from Philadelphia to London, returning Wed, 24 Sep, priced at S$862 found 15 hours ago
Delta
Mon, 15 Sep - Wed, 24 Sep
PHL
Philadelphia
LHR
London
S$862 Return, found 15 hours ago
S$862
Return
found 15 hours ago
Select Delta flight, departing Mon, 15 Sep from Philadelphia to London, returning Wed, 24 Sep, priced at S$862 found 15 hours ago
United
Sun, 3 Aug - Tue, 12 Aug
PHL
Philadelphia
LHR
London
S$862 Return, found 6 days ago
S$862
Return
found 6 days ago
Select United flight, departing Sun, 3 Aug from Philadelphia to London, returning Tue, 12 Aug, priced at S$862 found 6 days ago
British Airways
Fri, 29 Aug - Fri, 5 Sep
PHL
Philadelphia
LHR
London
S$890 Return, found 1 day ago
S$890
Return
found 1 day ago
Select British Airways flight, departing Fri, 29 Aug from Philadelphia to London, returning Fri, 5 Sep, priced at S$890 found 1 day ago

Find the cheapest month to fly from Philadelphia (PHL) to London (LHR)

October is typically the cheapest month to fly

From S$619 - S$1,086 per traveller.

Graph displaying average flight prices per month

Philadelphia to London route information
Origin airport
Philadelphia Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, United
Return price
S$669
Distance
5656 km
Average flight time
12 hours 8 mins

Flights from Philadelphia to London

There are several airlines that operate frequent flights from Philadelphia (PHL) to London (LHR) including

The earliest flight leaves Philadelphia Intl. Airport at 18:04 and arrives at Heathrow Airport at 06:35. The last flight of the day departs Philadelphia at 23:20 and arrives at London at 10:15.

The flight distance from Philadelphia to London is about 5720 km, the shortest flight is 06 hours 55 minutes with WestJet.

Expedia lets you search across the largest number of airlines and London flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Philadelphia London flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Philadelphia to London trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your London flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Philadelphia to London with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from PHL to London Heathrow?
The lowest price advertised for a round-trip journey from Philadelphia Intl. Airport (PHL) to LHR is S$670. But you better move fast. This price is taken from fares quoted within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Philadelphia Intl. Airport (PHL) to Heathrow Airport?
Most flights can be cancelled online, but each air carrier has its own set of terms and conditions. If you do decide to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Philadelphia Airport to LHR flights, you'll see a "no change fees" filter for you to select.
How far is the flight from PHL to LHR?
With a flight distance of 5,700 kilometres between Philadelphia and Hounslow, this is a long-haul journey. Be sure to stay hydrated and take a short walk down the aisle from time to time.
Which airlines fly direct from Philadelphia Airport to Heathrow Airport?
A leading airline that operates on the route from PHL to London Heathrow is British Airways (BA). It offers 30 flights every month. Another airline operating on this route is American Airlines (AA). You'll have 26 flights a month to select from.
Are Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) at the last minute could be your ticket to a great deal. However, it might cost you a whole lot more! If you'd rather avoid the risk, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to 12 months in advance. If your preferred air carrier hasn't released tickets yet, check back often as deals are updated all the time on Expedia.

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