How long does a flight from Philadelphia to London Heathrow Airport take?

The duration of a direct flight to London Heathrow Airport from Philadelphia is typically 7h 00m . The journey crosses a distance of 3,533 miles.

How many flights are there between Philadelphia and London Heathrow Airport per day?

Each day, there are between 2 and 3 direct flights that take off from Philadelphia and land in London Heathrow Airport, with an average flight time of 7h 08m. The most common departure time is 19:00 and most flights take off in the evening. Each week, there are 19 flights. The most frequent day of departure is Monday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

What’s the cheapest day of the week to fly from Philadelphia to London Heathrow Airport?

Your flight ticket price will generally be cheaper if you fly to London Heathrow Airport on a Monday and more expensive on a Friday. On your return trip to Philadelphia, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

What’s the earliest departure time from Philadelphia to London Heathrow Airport?

Early birds can take the earliest flight from Philadelphia at 18:35 and will be landing in London Heathrow Airport at 06:35.

Which airlines fly direct between Philadelphia and London Heathrow Airport?

There is just one airline that flies from Philadelphia to London Heathrow Airport direct and that is British Airways . The best return deal found from British Airways for the route is £518.

Which airlines offer Wi-Fi service onboard planes from Philadelphia to London Heathrow Airport?

All the following airlines offer inflight Wi-Fi service on the Philadelphia to London Heathrow Airport flight route: Iberia, British Airways, Finnair, American Airlines, KLM, Air France, Delta, and Aer Lingus.

Which aircraft models fly most regularly from Philadelphia to London Heathrow Airport?

The Airbus A350-1000 is the aircraft model that flies most regularly on the Philadelphia to London Heathrow Airport flight route.

Which airline alliances offer flights from Philadelphia to London Heathrow Airport?

oneworld is the only airline alliance operating flights between Philadelphia and London Heathrow Airport.

On which days can I fly direct from Philadelphia to London Heathrow Airport?

There are direct flights from Philadelphia to London Heathrow Airport on a daily basis.

What is the cheapest month to fly from Philadelphia to London Heathrow Airport?

The cheapest month for flights from Philadelphia to London Heathrow Airport is February , where tickets cost £543 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,127 and £999 respectively.

How does KAYAK find such low prices on flights from Philadelphia to London Heathrow Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to London Heathrow Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to London Heathrow Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Philadelphia is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Philadelphia to London Heathrow Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Philadelphia with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to London Heathrow Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

What is the cheapest stopover airport when flying from Philadelphia to London Heathrow Airport?

Flights via Dublin (DUB) offer the most affordable fares, with an average price of £530 for a return.

What is the most popular stopover airport when flying from Philadelphia to London Heathrow Airport?

Boston (BOS) is the top choice – 60% of KAYAK users who clicked on one-stop flights from Philadelphia to London Heathrow Airport picked an itinerary connecting there.

Which stopover airport has the quickest connection when flying from Philadelphia to London Heathrow Airport?

If you prefer a quick connection, Dublin (DUB) often has the shortest stopovers from Philadelphia to London Heathrow Airport, with an average time of 1h 23m .

Which stopover airport offers the shortest total travel time from Philadelphia to London Heathrow Airport?

Consider flying via Dublin (DUB) for the shortest journey. The average one-way travel time for flights connecting there is 9h 45m .

Which cabin class options are there for flights between Philadelphia and London Heathrow Airport?

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from Philadelphia to London Heathrow Airport?

In the past 5 days, the cheapest return tickets from Philadelphia to London Heathrow Airport were found on Aer Lingus (£624) and Iberia (£625).

How far in advance should I book a flight from Philadelphia to London Heathrow Airport?

To get a below average price on the flight from Philadelphia to London Heathrow Airport, you should book around 3 weeks before departure , which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Can I save money by flying with a stopover from Philadelphia to London Heathrow Airport?

Yes , flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £784 on average.

How much is a return flight from Philadelphia to London Heathrow Airport?

Flight prices are below average for this route right now. Flights to London Heathrow Airport from Philadelphia usually cost between £729 and £1,047 in January. The lowest price found in the past 5 days was £618 on Multiple Airlines (10 Jan–13 Jan).

What are the most popular airlines flying to London Heathrow Airport?

The most popular airline among KAYAK users flying to London Heathrow Airport is Virgin Atlantic, followed by British Airways and United Airlines.

£228 CHEAP FLIGHTS from Philadelphia to London Heathrow (PHL - LHR)

Save 34% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest return fare

£618

Typical prices: £487-£739

Austrian Airlines, Air Canada

Sun 10/1Wed 13/1

PHL - LHR • 2 stops

Cheapest direct flights

£625

Typical prices: £763-£1,136

Iberia

Wed 2/12Sun 6/12

PHL - LHR • Direct

Advice from real travellers

AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.

On British Airways, allow 2 hours at Heathrow; delays can affect onward plans.

On American Airlines, keep clothes in your carry-on, not only gate-check bags.

Expert advice

Direct flights

Every day

You can fly direct with American Airlines and British Airways. Average duration is 7h 08m

Direct flights

Top stopover airports

Dublin (DUB)

Cheapest • Avg £530 (return)

Dublin (DUB)

Shortest trip • 9h 45m (one-way)

Insights

When to book

3 weeks

in advance

Our data shows that travellers who book at least 3 weeks in advance save around 34% compared to booking last minute.

Insights

When to travel

February

Cheapest • 31% price drop

April

Most popular

Good to know

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Heathrow!

Flight Deals

Cheap Flights from Philadelphia to Heathrow (PHL-LHR)

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Direct

Recent return flight deals from Philadelphia to Heathrow

Sun, 10 Jan - Wed, 13 Jan

17:05 - 18:40PHL Philadelphia-LHR London Heathrow

44h 35m2 stops Toronto Pearson Intl Vienna Intl

06:50 - 14:44LHR London Heathrow-PHL Philadelphia

12h 54m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

£618Multiple Airlines

Tue, 6 Apr - Wed, 14 Apr

20:25 - 11:10PHL Philadelphia-LHR London Heathrow

9h 45m1 stop Dublin

08:45 - 18:55LHR London Heathrow-PHL Philadelphia

15h 10m2 stops Hamburg Dublin

£620Multiple Airlines

Wed, 7 Apr - Tue, 13 Apr

20:25 - 11:10PHL Philadelphia-LHR London Heathrow

9h 45m1 stop Dublin

08:45 - 18:55LHR London Heathrow-PHL Philadelphia

15h 10m2 stops Hamburg Dublin

£620Multiple Airlines

Wed, 7 Apr - Wed, 14 Apr

20:25 - 11:10PHL Philadelphia-LHR London Heathrow

9h 45m1 stop Dublin

08:45 - 18:55LHR London Heathrow-PHL Philadelphia

15h 10m2 stops Hamburg Dublin

£620Multiple Airlines

Tue, 6 Apr - Tue, 13 Apr

20:25 - 11:10PHL Philadelphia-LHR London Heathrow

9h 45m1 stop Dublin

08:45 - 18:55LHR London Heathrow-PHL Philadelphia

15h 10m2 stops Hamburg Dublin

£620Multiple Airlines

Wed, 20 Jan - Sat, 23 Jan

17:05 - 08:05PHL Philadelphia-LHR London Heathrow

34h 00m2 stops Toronto Pearson Intl Zurich

06:50 - 14:44LHR London Heathrow-PHL Philadelphia

12h 54m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

£623Multiple Airlines

Fri, 6 Nov - Wed, 18 Nov

17:40 - 08:05PHL Philadelphia-LHR London Heathrow

9h 25m1 stop Dublin

07:50 - 16:10LHR London Heathrow-PHL Philadelphia

13h 20m1 stop Dublin

£624Aer Lingus

Thu, 3 Dec - Sun, 6 Dec

09:30 - 06:55PHL Philadelphia-LHR London Heathrow

16h 25m1 stop Boston Logan Intl

20:45 - 16:10LHR London Heathrow-PHL Philadelphia

24h 25m1 stop Dublin

£624Multiple Airlines

Sun, 10 Jan - Wed, 13 Jan

19:45 - 06:15PHL Philadelphia-LHR London Heathrow

29h 30m1 stop Boston Logan Intl

06:15 - 15:50LHR London Heathrow-PHL Philadelphia

14h 35m1 stop Madrid Barajas

£645British Airways

Tue, 2 Mar - Tue, 23 Mar

15:50 - 10:25PHL Philadelphia-LHR London Heathrow

13h 35m1 stop Toronto Pearson Intl

06:30 - 15:05LHR London Heathrow-PHL Philadelphia

12h 35m1 stop Dublin

£660British Airways

Recent last minute flight deals from Philadelphia to Heathrow

Wed, 21 Oct - Wed, 4 Nov

15:26 - 06:30PHL Philadelphia-LHR London Heathrow

10h 04m1 stop Boston Logan Intl

09:20 - 17:08LHR London Heathrow-PHL Philadelphia

12h 48m1 stop Boston Logan Intl

£627JetBlue

Mon, 19 Oct - Mon, 16 Nov

06:30 - 06:30PHL Philadelphia-LHR London Heathrow

19h 00m1 stop Boston Logan Intl

09:20 - 17:08LHR London Heathrow-PHL Philadelphia

12h 48m1 stop Boston Logan Intl

£627JetBlue

Mon, 19 Oct - Wed, 4 Nov

15:26 - 06:30PHL Philadelphia-LHR London Heathrow

10h 04m1 stop Boston Logan Intl

09:20 - 21:11LHR London Heathrow-PHL Philadelphia

16h 51m1 stop Boston Logan Intl

£659JetBlue

Wed, 21 Oct - Wed, 4 Nov

10:22 - 06:30PHL Philadelphia-LHR London Heathrow

15h 08m1 stop Boston Logan Intl

09:20 - 21:11LHR London Heathrow-PHL Philadelphia

16h 51m1 stop Boston Logan Intl

£659JetBlue

Wed, 21 Oct - Wed, 4 Nov

10:22 - 06:30PHL Philadelphia-LHR London Heathrow

15h 08m1 stop Boston Logan Intl

09:20 - 21:11LHR London Heathrow-PHL Philadelphia

16h 51m1 stop Boston Logan Intl

£659JetBlue

Fri, 16 Oct - Sat, 31 Oct

14:09 - 06:30PHL Philadelphia-LHR London Heathrow

11h 21m1 stop Boston Logan Intl

09:20 - 17:08LHR London Heathrow-PHL Philadelphia

11h 48m1 stop Boston Logan Intl

£674JetBlue

Wed, 21 Oct - Sat, 31 Oct

10:22 - 06:30PHL Philadelphia-LHR London Heathrow

15h 08m1 stop Boston Logan Intl

09:20 - 17:08LHR London Heathrow-PHL Philadelphia

11h 48m1 stop Boston Logan Intl

£674JetBlue

Tue, 20 Oct - Sat, 31 Oct

15:26 - 06:30PHL Philadelphia-LHR London Heathrow

10h 04m1 stop Boston Logan Intl

09:20 - 21:11LHR London Heathrow-PHL Philadelphia

15h 51m1 stop Boston Logan Intl

£674JetBlue

Wed, 21 Oct - Wed, 28 Oct

18:45 - 06:50PHL Philadelphia-LHR London Heathrow

7h 05mdirect

13:10 - 17:15LHR London Heathrow-PHL Philadelphia

8h 05mdirect

£848British Airways

Wed, 21 Oct - Wed, 4 Nov

18:45 - 06:50PHL Philadelphia-LHR London Heathrow

7h 05mdirect

13:10 - 16:15LHR London Heathrow-PHL Philadelphia

8h 05mdirect

£848British Airways

Booking Insights

KAYAK’s insights & trends for Philadelphia to Heathrow flights

Get data-powered insights and trends into flights from Philadelphia to Heathrow to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

Stopovers

How much is a return flight from Philadelphia to London Heathrow Airport? This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to London Heathrow Airport departing in January.
What’s the cheapest day of the week to fly from Philadelphia to London Heathrow Airport? The average price of all round-trip flights from Philadelphia to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.: Your flight ticket price will generally be cheaper if you fly to London Heathrow Airport on a Monday and more expensive on a Friday. On your return trip to Philadelphia, you should consider flying back on a Tuesday, and avoid Sundays for better deals.
What is the cheapest month to fly from Philadelphia to London Heathrow Airport? To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.: The cheapest month for flights from Philadelphia to London Heathrow Airport is February, where tickets cost £543 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,127 and £999 respectively.
Can I save money by flying with a stopover from Philadelphia to London Heathrow Airport? The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.: Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £784 on average.
How far in advance should I book a flight from Philadelphia to London Heathrow Airport? To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.: To get a below average price on the flight from Philadelphia to London Heathrow Airport, you should book around 3 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Find deals

Expert advice

Our travel experts

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Low season	January
High season	April
Cheapest flight	£228

Best time to beat the crowds (25% less expensive on average)

Most popular time to fly and prices are also 22% lower on average.

Flight from Philadelphia to London Heathrow Airport

When to book flights from Philadelphia to Heathrow

Are your dates flexible? Find out the best times to travel from Philadelphia to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

LisaFlew with British Airways-May 2025

Make sure you have enough time in London if you have a transfer flight. I would recommend at least 2 hours.

RadicalFlew with American Airlines-May 2025

Don’t put everything in your gate check bags. Make sure you have clothes in your carry on

Verified travelerFlew with British Airways-Oct 2024

Eat well before boarding if you’re a picky eater.

GlennFlew with British Airways-Jun 2024

British airways could have many delays, ensure there's enough time for the layover

What is the cheapest flight from Philadelphia to London Heathrow Airport?
In the last 5 days, the lowest price for a flight from Philadelphia to London Heathrow Airport was £228 for a one-way ticket and £618 for a return.
Which airlines offer Wi-Fi service onboard planes from Philadelphia to London Heathrow Airport?
All the following airlines offer inflight Wi-Fi service on the Philadelphia to London Heathrow Airport flight route: Iberia, British Airways, Finnair, American Airlines, KLM, Air France, Delta, and Aer Lingus.
Which aircraft models fly most regularly from Philadelphia to London Heathrow Airport?
The Airbus A350-1000 is the aircraft model that flies most regularly on the Philadelphia to London Heathrow Airport flight route.
Which airline alliances offer flights from Philadelphia to London Heathrow Airport?
oneworld is the only airline alliance operating flights between Philadelphia and London Heathrow Airport.
On which days can I fly direct from Philadelphia to London Heathrow Airport?
There are direct flights from Philadelphia to London Heathrow Airport on a daily basis.
How does KAYAK find such low prices on flights from Philadelphia to London Heathrow Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to London Heathrow Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to London Heathrow Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Philadelphia is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Philadelphia to London Heathrow Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Philadelphia with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to London Heathrow Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Looking for a cheap flight from London Heathrow Airport to Philadelphia? 25% of our users found flights on this route for London Heathrow Airport or less round-trip.

Direct departures

Philadelphia to London Heathrow

Monday