Cheap flights from London to Philadelphia

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Compare London to Philadelphia flight deals

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Flight deals from London to Philadelphia

Looking for a cheap last-minute deal or the best round-trip flight from London to Philadelphia? If you want to travel next month, round-trip fares start from $622. Find the lowest prices on one-way and round-trip tickets right here.

Philadelphia.$504 per passenger.Departing Fri, Apr 16, returning Fri, Apr 23.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Fri, Apr 16, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Fri, Apr 23, arriving in London Stansted.Price includes taxes and charges.From $504, select.

Philadelphia.$548 per passenger.Departing Mon, Nov 23, returning Thu, Dec 3.Round-trip flight with Ryanair and Frontier Airlines.Outbound indirect flight with Ryanair, departing from London Gatwick on Mon, Nov 23, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Dec 3, arriving in London Gatwick.Price includes taxes and charges.From $548, select.

Philadelphia.$587 per passenger.Departing Mon, Nov 2, returning Sat, Nov 7.Round-trip flight with Ryanair and Frontier Airlines.Outbound indirect flight with Ryanair, departing from London Stansted on Mon, Nov 2, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Nov 7, arriving in London Gatwick.Price includes taxes and charges.From $587, select.

Philadelphia.$593 per passenger.Departing Thu, Dec 3, returning Tue, Dec 8.Round-trip flight with Norse Atlantic Airways (UK) and Frontier Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departing from London Gatwick on Thu, Dec 3, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Dec 8, arriving in London Gatwick.Price includes taxes and charges.From $593, select.

Philadelphia.$618 per passenger.Departing Sat, Oct 31, returning Thu, Nov 5.Round-trip flight with Ryanair and jetBlue.Outbound indirect flight with Ryanair, departing from London Luton on Sat, Oct 31, arriving in Philadelphia International.Inbound indirect flight with jetBlue, departing from Philadelphia International on Thu, Nov 5, arriving in London Heathrow.Price includes taxes and charges.From $618, select.

Philadelphia.$621 per passenger.Departing Wed, Sep 16, returning Sat, Oct 3.Round-trip flight with Ryanair and Frontier Airlines.Outbound indirect flight with Ryanair, departing from London Stansted on Wed, Sep 16, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Oct 3, arriving in London Gatwick.Price includes taxes and charges.From $621, select.

Philadelphia.$622 per passenger.Departing Wed, Oct 14, returning Wed, Oct 14.Round-trip flight with United.Outbound indirect flight with United, departing from London Heathrow on Wed, Oct 14, arriving in Philadelphia International.Inbound indirect flight with United, departing from Philadelphia International on Wed, Oct 14, arriving in London Heathrow.Price includes taxes and charges.From $622, select.

Philadelphia.$635 per passenger.Departing Thu, Oct 22, returning Mon, Dec 14.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Thu, Oct 22, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Mon, Dec 14, arriving in London Stansted.Price includes taxes and charges.From $635, select.

Philadelphia.$639 per passenger.Departing Tue, Sep 15, returning Tue, Sep 15.Round-trip flight with United.Outbound indirect flight with United, departing from London Heathrow on Tue, Sep 15, arriving in Philadelphia International.Inbound indirect flight with United, departing from Philadelphia International on Tue, Sep 15, arriving in London Heathrow.Price includes taxes and charges.From $639, select.

Philadelphia.$640 per passenger.Departing Thu, Sep 24, returning Fri, Nov 27.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Thu, Sep 24, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Fri, Nov 27, arriving in London Stansted.Price includes taxes and charges.From $640, select.

Philadelphia.$647 per passenger.Departing Mon, Jan 25, returning Tue, Feb 2.Round-trip flight with Ryanair and jetBlue.Outbound indirect flight with Ryanair, departing from London Luton on Mon, Jan 25, arriving in Philadelphia International.Inbound indirect flight with jetBlue, departing from Philadelphia International on Tue, Feb 2, arriving in London Luton.Price includes taxes and charges.From $647, select.

Philadelphia.$656 per passenger.Departing Thu, Dec 31, returning Fri, Jan 1.Round-trip flight with United.Outbound indirect flight with United, departing from London Heathrow on Thu, Dec 31, arriving in Philadelphia International.Inbound indirect flight with United, departing from Philadelphia International on Fri, Jan 1, arriving in London Heathrow.Price includes taxes and charges.From $656, select.

Philadelphia.$684 per passenger.Departing Thu, Mar 11, returning Fri, Apr 2.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Thu, Mar 11, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Fri, Apr 2, arriving in London Stansted.Price includes taxes and charges.From $684, select.

Philadelphia.$698 per passenger.Departing Tue, Mar 9, returning Tue, Mar 16.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Tue, Mar 9, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Tue, Mar 16, arriving in London Stansted.Price includes taxes and charges.From $698, select.

Philadelphia.$708 per passenger.Departing Tue, May 25, returning Mon, May 31.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Tue, May 25, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Mon, May 31, arriving in London Stansted.Price includes taxes and charges.From $708, select.

Philadelphia.$717 per passenger.Departing Sun, May 23, returning Tue, Jun 1.Round-trip flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departing from London Stansted on Sun, May 23, arriving in Philadelphia International.Inbound indirect flight with Aer Lingus, departing from Philadelphia International on Tue, Jun 1, arriving in London Stansted.Price includes taxes and charges.From $717, select.

Find the cheapest month to fly from London to Philadelphia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Philadelphia flights are currently cheapest in April.

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Direct flights from London to Philadelphia

Alternative London to Philadelphia routes

Looking for the cheapest, fastest or easiest route from London to Philadelphia? You could fly into the following airports instead.

London to Philadelphia: Flight information

The things to know before you go.

Cheapest flight found	$505
Cheapest month to fly	April
Average flight time	8 hrs, 4 mins
Most popular airline	American Airlines
Average flights per week	132

Finding cheap flights from London to Philadelphia: Frequently asked questions

How many airports are there in Philadelphia?

There are 5 airports in Philadelphia: Philadelphia International, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.

How much are round-trip flights from London to Philadelphia?

The best price we found for a round-trip flight from London to Philadelphia is $505. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from London to Philadelphia?

8 hours and 4 minutes is the average flight time from London to Philadelphia.

Which airlines fly direct from London to Philadelphia?

American Airlines, Finnair and Iberia fly direct from London to Philadelphia.

How many flights are there a week from London to Philadelphia?

There are 132 flights per week flying from London to Philadelphia, as of September 2026.

When is the cheapest time to fly from London to Philadelphia?

The cheapest month to fly from London to Philadelphia is usually April.

What's the cheapest airport to fly to in Philadelphia?

If you're flying from London, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the center of Philadelphia. We've found flights to this airport from $505.

Which upcoming date is cheapest to fly from London to Philadelphia on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Philadelphia on Friday, April 16, 2027.

Can I get a direct flight from London to Philadelphia?

Yes – the average flight time is 8 hours and 4 minutes.

How can I get the best flight deal from London to Philadelphia?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Philadelphia?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Philadelphia?

In September, the average temperature is usually around 21°C. July is typically the warmest month in Philadelphia, when it usually averages around 31°C. You can expect the least rain in November. The coldest month is January, with temperatures averaging -1°C. The rainiest month is July.

Which is the cheapest airline to fly with from London to Philadelphia?

The cheapest airline that flies to Philadelphia is Ryanair, and the cheapest airline that flies to Philadelphia Trenton-Mercer Airport is Iberia.

Flying from London to Philadelphia: what you need to know

When organizing a flight from London to Philadelphia, you'll have a good selection of airports to take off from. Consider London Heathrow Airport (LHR) and London Gatwick Airport (LGW) for your departure options. Other possibilities include London Stansted Airport (STN), London Luton Airport (LTN) and London City Airport (LCY).
Philadelphia International Airport (PHL) is where your flight will arrive in Philadelphia.
Hop on a direct London to Philadelphia flight and you'll be in the air for an average of 8 hours.
Philadelphia's timezone is UTC-5, making Philadelphia five hours behind London.
London Heathrow Airport (LHR) to Philadelphia International Airport (PHL) is the most popular route that connects these two cities. There are 18 departures a week to choose from. If you have things to finalize before heading off, the last flight from London to Philadelphia is with American Airlines at 14:10. Choose the first LHR to PHL departure operated by American Airlines at 10:05 to make the most of your arrival in Philadelphia.
Give yourself plenty of time to make your London to Philadelphia flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.
Flying during a peak month such as July? Public holidays and other popular periods can mean longer lines and delays at security. Play it safe and arrive up to four hours before international flights and two hours before a domestic departure.

How to find the cheapest flights from London to Philadelphia

Booking ahead of time is often the key to securing a cheap London to Philadelphia flight. Airlines adjust prices based on demand, so the closer your departure date, the more it could cost you.
If you're willing to be flexible with your travel plans, use the 'Whole month' search tool. It'll give you the lowest price across each month when searching for your plane ticket from London to Philadelphia.
Getting a cheap flight from London to Philadelphia is a piece of cake with Price Alerts. Simply create one of these automatic alerts and we'll get in touch as soon as a better deal is available.
Save on your London to Philadelphia flight with the help of our filters. Select your ideal times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Flying from London

London Heathrow Airport (LHR)

If you're searching for a direct flight from London to Philadelphia, you can leave from London Heathrow Airport (LHR). Fly from LHR to Philadelphia International Airport (PHL) in one seamless journey.
American Airlines is a popular airline that offers direct London to Philadelphia plane tickets leaving from LHR.
Consider adding a stopover to potentially save on your London to Philadelphia flight. Just deselect 'Direct flights only' when browsing departures from London Heathrow Airport. Take a pause at one of these popular options:
- Atlanta Hartsfield-Jackson Airport (ATL)
- New York Newark Airport (EWR)
- Boston Logan International Airport (BOS)
LHR is around 26 kilometers from central London. If you're driving, ride-sharing or catching a cab from the center, it'll take you 45 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the trip time to be around 25 minutes.
Need a convenient hotel close to London Heathrow Airport? If you're catching an early flight from London to Philadelphia, these stays will have you moments from your check-in counter:
Of the flights that depart from London Heathrow Airport, 78% land on schedule at their destination.

London Gatwick Airport (LGW)

Visit friends or family or just take a moment to recharge with a stopover. If you'd like to split up your London to Philadelphia flight, check out these options when leaving from London Gatwick Airport:
- Orlando International Airport (MCO)
- Dublin Airport (DUB)
- Montreal Pierre Elliott Trudeau Airport (YUL)
With public transport, you can travel from central London to LGW in around 45 minutes. The airport is roughly 40 kilometers away. Driving will take you about 1 hour 5 minutes.
Get a head start on your vacation with an extra night away from home. Before your flight from London to Philadelphia, kick back in one of these hotels near London Gatwick Airport:
The majority of flights that leave London Gatwick Airport get to their destination right on cue. It boasts an on-time performance rate of 83%.

London Stansted Airport (STN)

Lock in a ticket from London to Philadelphia out of London Stansted Airport (STN) with a stop or two. Popular stopovers between STN and Philadelphia are:
- Amsterdam Schiphol Airport (AMS)
- Copenhagen Airport (CPH)
- Dublin Airport (DUB)
The journey time to STN from central London is around 45 minutes by public transport. If you're planning to travel by car, it'll take you roughly 1 hour 5 minutes to cover the 48 kilometers or so.
Set yourself up for a smooth departure — stay close to London Stansted Airport and know you'll be at your gate with time to spare. Get settled at one of these hotels the day before if you have an early London to Philadelphia flight:
STN has an on-time performance rate of 80%. This means the majority of its flights arrive at their destination on schedule and your trip is smooth and easy.

Arriving in Philadelphia

Philadelphia International Airport (PHL)

Philadelphia International Airport (PHL) to central Philadelphia takes around 20 minutes by car. The center is roughly 11 kilometers away.
When traveling on public transport, expect a journey time of about 30 minutes.
The last thing you need is a long journey to your hotel if you're getting in late on a flight from London to Philadelphia. Stay at one of these accommodation options near PHL instead:
Pick up a Philadelphia International Airport rental car and explore Philadelphia and beyond with your own set of wheels. Dollar, Thrifty and Budget are top providers you can book with here.
To lock in the lowest price, reserve your ride from Philadelphia International Airport around three weeks in advance of your London to Philadelphia flight.
PHL is situated at 8500 Essington Ave.

Philadelphia Trenton-Mercer Airport (TTN)

Philadelphia Trenton-Mercer Airport (TTN) is roughly 48 kilometers from the center of Philadelphia. After your flight from London to Philadelphia, it'll take you approximately 40 minutes to reach the heart of the city in a cab or ride-share.
The journey will take approximately 1 hour 35 minutes on public transport.
You'll find some comfortable places to call home for the night near TTN. Kick back after your London to Philadelphia flight at one of these well-located options:
Budget, National and Enterprise make picking up a Philadelphia Trenton-Mercer Airport rental car quick and easy. These trusted companies are located in or around the terminal and will have you on the road before long.
Snap up a deal by booking your ride from TTN four weeks ahead of time. You can also expect to have a greater selection of vehicles.
You can find Philadelphia Trenton-Mercer Airport at Scotch Road, Terminal Building.

Best time to go to Philadelphia

It's time to plan your travel dates for your flight from London to Philadelphia. August is the most popular month to visit Philadelphia. If you want a more relaxed atmosphere, go in March.
Book a London to Philadelphia ticket departing in July if you want to explore the city during its warmest month. Expect temperatures in Philadelphia to range from 18ºC (64ºF) to 32ºC (90ºF).
January has average temperatures of between -7ºC (19ºF) and 9ºC (48ºF). Look for cheap flights from London to Philadelphia around that time if you want to travel in cooler conditions.

More about Philadelphia

Start your Philadelphia trip off on the right foot by choosing the perfect place to stay. After booking your flight from London to Philadelphia, explore our selection of hotels including:
Independence Hall and Liberty Bell are just a couple of the big attractions to add to your Philadelphia must-do list. Continue your sightseeing adventures at Philadelphia Museum of Art.

Explore more of the United States

Philadelphia has plenty going for it, but there are so many other parts of the United States waiting to be explored. About 129 kilometers northeast of Philadelphia, a visit to New York will keep your itinerary busy. Don't miss top attractions like Central Park, Statue of Liberty and The Metropolitan Museum of Art.
Boston is another sought-after destination in the United States and is around 434 kilometers northeast of Philadelphia. No trip is complete without visiting Museum of Fine Arts, Boston, Freedom Trail and Boston Tea Party Ships & Museum.