Cheap Flights from Philadelphia to London Heathrow

Compare Philadelphia to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from Philadelphia to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Philadelphia to London Heathrow Airport? If you want to travel next month, return fares start from R 11,995. Find the lowest prices on one-way and return tickets right here.

London.R 4,986 per passenger.Departing Mon, 28 Sep.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Philadelphia International on Mon, 28 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 4,986, select.

London.R 5,040 per passenger.Departing Thu, 5 Nov.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Philadelphia International on Thu, 5 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 5,040, select.

London.R 5,264 per passenger.Departing Tue, 1 Dec.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Tue, 1 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 5,264, select.

London.R 5,264 per passenger.Departing Sun, 25 Apr.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Sun, 25 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 5,264, select.

London.R 5,313 per passenger.Departing Sun, 18 Oct.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Philadelphia International on Sun, 18 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 5,313, select.

London.R 5,313 per passenger.Departing Sat, 25 Jul.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Philadelphia International on Sat, 25 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 5,313, select.

London.R 5,326 per passenger.Departing Mon, 10 Aug.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Mon, 10 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 5,326, select.

London.R 5,365 per passenger.Departing Wed, 3 Feb.One-way flight with Air France.Outbound indirect flight with Air France, departs from Philadelphia International on Wed, 3 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,365, select.

London.R 5,675 per passenger.Departing Sun, 4 Oct.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Sun, 4 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 5,675, select.

London.R 5,675 per passenger.Departing Mon, 15 Feb.One-way flight with Iberia.Outbound direct flight with Iberia departs from Philadelphia International on Mon, 15 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,675, select.

London.R 5,675 per passenger.Departing Tue, 29 Dec.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Tue, 29 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 5,675, select.

London.R 5,675 per passenger.Departing Sun, 31 Jan.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Sun, 31 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 5,675, select.

London.R 5,676 per passenger.Departing Sun, 8 Nov.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Sun, 8 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 5,676, select.

London.R 5,681 per passenger.Departing Sun, 25 Apr.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Sun, 25 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 5,681, select.

London.R 5,699 per passenger.Departing Tue, 11 May.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from Philadelphia International on Tue, 11 May, arriving in London Heathrow.Price includes taxes and charges.From R 5,699, select.

London.R 5,701 per passenger.Departing Mon, 3 May.One-way flight with British Airways.Outbound direct flight with British Airways departs from Philadelphia International on Mon, 3 May, arriving in London Heathrow.Price includes taxes and charges.From R 5,701, select.

Find the cheapest month to fly from Philadelphia to London Heathrow

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

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Direct flights from Philadelphia to London Heathrow

Philadelphia to London Heathrow: Alternative routes

Compare routes from Philadelphia to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

Philadelphia to London: Flight information

The things to know before you go.

Cheapest flight found	R 4,986
Cheapest month to fly	September
Average flight time	7 hrs, 9 mins
Most popular airline	American Airlines
Average flights per week	101

Finding cheap flights from Philadelphia to London Heathrow: Frequently asked questions

How much are return flights from Philadelphia to London Heathrow?

The best price we found for a return flight from Philadelphia to London Heathrow is R 11,913. 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 Philadelphia to London Heathrow?

7 hours and 9 minutes is the average flight time from Philadelphia to London Heathrow.

Which airlines fly direct from Philadelphia to London Heathrow?

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

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

As of July 2026, there are 101 flights per week flying from Philadelphia to London Heathrow.

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

The cheapest month to fly from Philadelphia to London Heathrow is usually October.

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

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to London Heathrow Airport on Saturday, 24 October 2026.

Can I get a direct flight from Philadelphia to London Heathrow Airport?

Yes – the average flight time is 7 hours and 9 minutes.

How can I find the best flight deal to London Heathrow?

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 London Heathrow 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 London?

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

Travelling from Philadelphia to London Heathrow Airport (LHR): What you need to know

Philadelphia International Airport (PHL) is Philadelphia's main airport. Explore your options for reserving a flight from Philadelphia to London Heathrow Airport (LHR) jetting off from here.
Around 7 hours 5 minutes is the usual time it takes for a direct Philadelphia to London Heathrow Airport flight.
London Heathrow Airport is located in London. The city is in the UTC+0 timezone and is five hours ahead of Philadelphia.
Philadelphia International Airport (PHL) to London Heathrow Airport (LHR) is the most popular route. There are 18 direct flights a week to pick from. If you prefer to head out later, hop on the last flight with American Airlines at 11:20pm. Choose the first PHL to LHR departure operated by British Airways at 6:30pm if you want to get going earlier.
To ensure you get on your flight from Philadelphia to LHR, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and an hour before domestic flights is the standard rule.
July is a busy month for travelling. If you're taking off then or around a major holiday like Christmas or Thanksgiving, be there even earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international journeys.

Airports in Philadelphia

Philadelphia International Airport (PHL)

Get there in one go from Philadelphia International Airport (PHL). Direct flights from Philadelphia to London Heathrow Airport (LHR) are available from here.
When jetting out of PHL, you can take a direct flight from Philadelphia to London Heathrow Airport with American Airlines.
Most travellers prefer to book seats with American Airlines from PHL to LHR.
With an impressive 86.82% of services landing on schedule, American Airlines leads the way in punctuality on this route.
We make it easy to book cheap flights from Philadelphia to LHR that include a stopover. To explore your options leaving from Philadelphia International Airport (PHL), deselect 'Direct flights only.' Then, choose a flight with a stop long enough to tour your chosen city. Some popular stopovers between PHL and LHR include:
- Newark Liberty International Airport (EWR)
- Boston Logan International Airport (BOS)
- Dublin Airport (DUB)
The journey from central Philadelphia to PHL takes around 30 minutes by public transport. If you ride-share, drive or grab a taxi, you'll cover the 18 kilometres in 20 minutes or so, depending on traffic conditions.
Catching an early flight from Philadelphia to London Heathrow Airport? Avoid the mad dash to the terminal (and get a little more snooze time) by choosing one of these hotels close to Philadelphia International Airport:
77% of flights leaving from Philadelphia International Airport arrive at their destination on time.
PHL's address is 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

You can arrive at TTN from the centre of Philadelphia in approximately 40 minutes by car, depending on traffic conditions. The ride by public transport takes roughly 1 hour 35 minutes to cover the 48 kilometres or so.
Start your holiday sooner with an extra night away from home. Before your Philadelphia to LHR flight, stay in one of these hotels close to Trenton-Mercer Airport:
Trenton-Mercer Airport has an on-time performance rate of 76%. This figure gives an insight into how frequently flights that take off from this airport reach their destination on schedule.
You'll find TTN at Scotch Road, Terminal Building.

About London Heathrow Airport (LHR)

The last thing you need is a long journey to your hotel if you're getting in late on a flight from Philadelphia to London Heathrow Airport. Get comfy at one of these accommodation options near LHR instead:
Lock in the best deal by booking your ride around one week ahead of your Philadelphia to London Heathrow Airport flight.

Getting from London Heathrow Airport (LHR) to central London

London Heathrow Airport is around 24 kilometres from central London. It takes around 45 minutes or so to get to the city by car.
Travelling by public transport takes roughly 25 minutes.

How to find the cheapest flights from Philadelphia to London Heathrow Airport (LHR)

R 4,986 is currently the lowest price for a one-way ticket from Philadelphia to London Heathrow Airport. Return flights start at R 11,913. These fares can change based on demand.
To snap up cheap flights from Philadelphia to LHR, book your plane ticket two months ahead of your planned departure.
The best month for scoring cheap Philadelphia to London Heathrow Airport tickets is July. Use the 'Whole month' tool to compare flight prices, then choose the dates that offer the biggest savings.
You don't need to check every day to find out if prices have dropped when you create a Price Alert. We'll notify you as soon as a better deal comes up on plane tickets from Philadelphia to LHR.
Lock in a cheap flight from Philadelphia to London Heathrow Airport by using the search filters. Choose your preferred times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Philadelphia to London Heathrow Airport (LHR)

July is the busiest month for flights from Philadelphia to London Heathrow Airport (LHR). Visit London in January for a quieter experience.
Book a Philadelphia to LHR plane ticket departing in July if you want to visit the city during its warmest month. You can expect temperatures in London to range from 11ºC (52ºF) to 26ºC (79ºF).
If you want cooler conditions, search for a cheap ticket from Philadelphia to London Heathrow Airport in January when temperatures are between 0ºC (32ºF) and 9ºC (48ºF).

More about London

When it comes to looking for somewhere to rest your head, you'll find the most popular stays in London right here. Browse these hotels once you've booked your flight from Philadelphia to London Heathrow Airport:
There are so many things to see and do in this city, it can be hard to figure out where to begin. The British Museum, Westminster Abbey and Big Ben are leading attractions which should be on every London itinerary.

Explore more of the United Kingdom

London has loads to offer, but there are so many other corners of the United Kingdom you should also see. About 257 kilometres northwest of London, a visit to Manchester will keep your itinerary packed. Start with leading sights like Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry.
Birmingham is another favourite destination in the United Kingdom and is around 153 kilometres northwest of London. No journey is complete without seeing Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience.