$666 Cheap Flights from London to Philadelphia in 2025

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Flight deals from London to Philadelphia

Looking for a cheap last-minute deal or the best return flight from London to Philadelphia? Find the lowest prices on one-way and return tickets right here.

Philadelphia.$666 per passenger.Departing Tue, 6 May, returning Sat, 10 May.Return flight with Norse Atlantic Airways (UK) and Spirit Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Tue, 6 May, arriving in Philadelphia International.Inbound indirect flight with Spirit Airlines, departs from Philadelphia International on Sat, 10 May, arriving in London Gatwick.Price includes taxes and charges.From $666, select.

Philadelphia.$679 per passenger.Departing Tue, 29 Apr, returning Thu, 8 May.Return flight with Norse Atlantic Airways (UK) and Spirit Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Tue, 29 Apr, arriving in Philadelphia International.Inbound indirect flight with Spirit Airlines, departs from Philadelphia International on Thu, 8 May, arriving in London Gatwick.Price includes taxes and charges.From $679, select.

Philadelphia.$693 per passenger.Departing Tue, 15 Apr, returning Mon, 28 Apr.Return flight with SWISS and Air Canada.Outbound indirect flight with SWISS, departs from London Heathrow on Tue, 15 Apr, arriving in Philadelphia International.Inbound indirect flight with Air Canada, departs from Philadelphia International on Mon, 28 Apr, arriving in London Heathrow.Price includes taxes and charges.From $693, select.

Philadelphia.$883 per passenger.Departing Thu, 1 May, returning Fri, 18 Jul.Return flight with Norse Atlantic Airways (UK) and Spirit Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Thu, 1 May, arriving in Philadelphia International.Inbound indirect flight with Spirit Airlines, departs from Philadelphia International on Fri, 18 Jul, arriving in London Gatwick.Price includes taxes and charges.From $883, select.

Philadelphia.$954 per passenger.Departing Sun, 27 Apr, returning Sat, 19 Jul.Return flight with Norse Atlantic Airways (UK) and Spirit Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Sun, 27 Apr, arriving in Philadelphia International.Inbound indirect flight with Spirit Airlines, departs from Philadelphia International on Sat, 19 Jul, arriving in London Gatwick.Price includes taxes and charges.From $954, select.

Philadelphia.$957 per passenger.Departing Tue, 16 Sep, returning Mon, 22 Sep.Return flight with United.Outbound indirect flight with United, departs from London Heathrow on Tue, 16 Sep, arriving in Philadelphia International.Inbound indirect flight with United, departs from Philadelphia International on Mon, 22 Sep, arriving in London Heathrow.Price includes taxes and charges.From $957, select.

Philadelphia.$979 per passenger.Departing Sat, 31 May, returning Sat, 7 Jun.Return flight with Norse Atlantic Airways (UK) and Spirit Airlines.Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Sat, 31 May, arriving in Philadelphia International.Inbound indirect flight with Spirit Airlines, departs from Philadelphia International on Sat, 7 Jun, arriving in London Gatwick.Price includes taxes and charges.From $979, select.

Philadelphia.$981 per passenger.Departing Fri, 29 Aug, returning Fri, 5 Sep.Return flight with United.Outbound indirect flight with United, departs from London Heathrow on Fri, 29 Aug, arriving in Philadelphia International.Inbound indirect flight with United, departs from Philadelphia International on Fri, 5 Sep, arriving in London Heathrow.Price includes taxes and charges.From $981, 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 May.

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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	$666
Cheapest month to fly	May
Average flight time	7 hrs, 58 mins
Most popular airline	Finnair
Average flights per week	148

Finding cheap flights from London to Philadelphia: Frequently asked questions

How many airports are there in Philadelphia?

There are 6 airports in Philadelphia: Philadelphia International, Blue Bell, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.

How much are return flights from London to Philadelphia?

The best price we found for a return flight from London to Philadelphia is $666. 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?

7 hours and 58 minutes is the average flight time from London to Philadelphia.

Which airlines fly direct from London to Philadelphia?

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

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

As of March 2025, there are 148 flights per week flying from London to Philadelphia.

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

The cheapest month to fly from London to Philadelphia is usually March 2025.

Which is the cheapest airport to fly into in Philadelphia?

If you're flying from London, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the centre of Philadelphia. We've found flights into this airport from $666.

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 Tuesday, 6 May 2025.

Can I get a direct flight from London to Philadelphia?

Yes – the average flight time is 7 hours and 58 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 March, the average temperature is usually around 4°C. July is typically the warmest month in Philadelphia, when it usually averages around 30°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -5°C. The rainiest month is July.

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

The cheapest airline that flies to Philadelphia is Norse Atlantic Airways (UK). And the cheapest airline that flies to Blue Bell Airport is British Airways.

Travelling from London to Philadelphia: what you need to know

London has multiple airports where you can start your holiday. Check out your departure options from London Heathrow Airport (LHR) and London Gatwick Airport (LGW) when planning your flight from London to Philadelphia. Stansted Airport (STN), London Luton Airport (LTN) and London City Airport (LCY) are the other main bases in the city.
Come in for landing at Philadelphia's primary hub, Philadelphia International Airport (PHL).
The average duration of a direct flight from London to Philadelphia is 8 hours 5 minutes. Philadelphia's timezone is UTC-4, which makes Philadelphia 4 hours behind London.
With 26 weekly flights between the two airports, London Heathrow Airport (LHR) to Philadelphia International Airport (PHL) is the most popular route. Hop on the first flight from London to Philadelphia with American Airlines at 09:45. If you'd like to get more out of your day before jetting off, the last departure from LHR to PHL is with British Airways at 13:40.
Give yourself enough time to get on your flight from London to Philadelphia. As a general rule, arrive at least two hours before international departures and an hour ahead for domestic flights.
Heading away during a peak period like a bank holiday? Expect longer queues at check-in and security. To give yourself peace of mind, arrive up to four hours before international flights and two hours ahead of domestic departures.
If you have a passport from United Kingdom, you'll need an ETA to visit United States. This applies if you're booking a cheap flight from London to Philadelphia for tourism purposes. Requirements may be different if you're travelling for business or other reasons. Always check the visa rules ahead of booking and definitely before you fly.

Flying from London

London Heathrow Airport (LHR)

Jet off from London Heathrow Airport (LHR) on a nonstop flight from London to Philadelphia. From LHR, you can fly directly into Philadelphia International Airport (PHL).
Book your direct flight from London to Philadelphia with American Airlines. This top carrier offers services from LHR.
Consider adding a stopover to potentially find a cheaper flight from London to Philadelphia. Simply deselect 'Direct flights only' when browsing departures from London Heathrow Airport. Take a break from travelling at one of these airports:
- Hartsfield-Jackson Atlanta International Airport (ATL)
- Tampa International Airport (TPA)
- Orlando International Airport (MCO)
LHR is around 31 kilometres from central London. If you're driving, ride-sharing or catching a cab from the centre, it'll take 57 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the journey time to be around 1 hour and 1 minute.
Searching for a convenient hotel close to London Heathrow Airport? If you've booked an early flight from London to Philadelphia, these stays will have you sleeping moments from your check-in counter:

London Gatwick Airport (LGW)

Get the most out of your holiday with a stopover on your flight from London to Philadelphia. Visit family or friends or tick another city off your list. Whatever you decide to do, here's where you can stop between London Heathrow Airport and Philadelphia:
- Hartsfield-Jackson Atlanta International Airport (ATL)
- Tampa International Airport (TPA)
- Orlando International Airport (MCO)
LGW is around 80 kilometres from central London. It'll take 1 hour and 19 minutes or so to get to the airport if you're driving from the city centre. Public transport takes roughly 1 hour and 26 minutes.
Start your holiday early with an additional night away from home. Before catching your flight from London to Philadelphia, unwind in one of these hotels near London Gatwick Airport:

Arriving in Philadelphia

Philadelphia International Airport (PHL)

Philadelphia International Airport (PHL) to central Philadelphia is roughly 19 kilometres. It'll take you around 17 minutes to reach the centre driving.
Getting there by public transport takes roughly 44 minutes.
Consider staying in a hotel close to PHL if you have a late flight from London to Philadelphia. Select one of these options and skip the long transfer:

Trenton-Mercer Airport (TTN)

As soon as your flight from London to Philadelphia has hit the tarmac, you can make your way to the city centre in around 39 minutes by car. Central Philadelphia is roughly 56 kilometres from Trenton-Mercer Airport (TTN).
Public transport will get you there in about 1 hour and 43 minutes.
There are some cosy hotels ready to welcome you near TTN. Kick back after your flight from London to Philadelphia at one of these perfectly located options:

How to find the cheapest flights from London to Philadelphia

At the moment, $390 is the best price we've found for a one-way ticket from London to Philadelphia. The cheapest price for a return flight is $666. Remember fares may change due to availability at the time of booking.
Lock in cheap tickets from London to Philadelphia by booking 9 months ahead. Based on our research, that's the sweet spot for bagging a bargain.
May is the cheapest month for flight tickets from London to Philadelphia. If you're looking to travel at a different time of year, the 'Whole month' tool will show you the lowest prices across every month.
Set up a Price Alert for cheap tickets from London to Philadelphia. There's no need to check every day to see whether prices have fallen. We'll tell you the moment the price changes.
Use filters to tailor your flights from London to Philadelphia. Pick your preferred departure and arrival times, number of stops and airlines. Or sort your results by 'Cheapest' to get the best deals.

Best time to go to Philadelphia

It's time to pick your trip dates for your flight from London to Philadelphia. August is the most popular month to visit Philadelphia. If you like a more relaxed atmosphere, go in February.
Lock in your flight from London to Philadelphia for July if you want to visit the city during its warmest month. Expect temperatures in Philadelphia to range from 18ºC to 32ºC.
January has average temperatures of between -7ºC and 9ºC. Search for cheap tickets from London to Philadelphia around that time if you'd rather travel in cooler conditions.

More about Philadelphia

When it comes to looking for somewhere to lay your head, you'll find the most popular stays in Philadelphia right here. Explore these hotels once you've booked your flight from London to Philadelphia:
Liberty Bell and Independence Hall are just a couple of the big attractions to put on your Philadelphia to-do list. Keep the momentum going by heading to Philadelphia Museum of Art.

Complete your Philadelphia trip with a car rental

We use the same magic that helped you find your cheap flight from London to Philadelphia to track down incredible deals on car rentals. Search for your ride in seconds and easily compare your options. Plus you'll find all the info you need to drive in Philadelphia, from the most popular rental company to the average daily price.