How long is the flight from Philadelphia to London Heathrow Airport?

For as low as £674, JetBlue can have you in London Heathrow Airport from Philadelphia in 11h 20m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What is the cheapest airline to fly from Philadelphia to London Heathrow Airport round-trip?

Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £518 on this airline. Users have found that British Airways is 33% cheaper than the other options available to this destination.

Weekly flight availability from Philadelphia to London Heathrow Airport

The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the cheapest flights from Philadelphia to London Heathrow Airport?

The cheapest flight price from Philadelphia to London Heathrow Airport is £533. On average you can expect to pay £777. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £516.

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

Consider Malaysia Airlines (92%), American Airlines (88%) or British Airways (88%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.

What airport do you fly from for flights from Philadelphia to London Heathrow?

Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 13 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Philadelphia to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.

Can I find deals for business class flights from Philadelphia to Heathrow?

Yes. Cheapflights offers flight deals from Philadelphia to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£242+ Cheap Flights from Philadelphia to London Heathrow Airport

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in February or January, booked 77 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Mon 30/1117:40 -

1 stop9h 25m

Sat 12/1208:05 -

2 stops37h 05m

Deal found 8/10£619

Sat 28/1117:40 -

1 stop9h 25m

Wed 2/1219:30 -

2 stops25h 40m

Deal found 8/10£623

Mon 7/1217:40 -

1 stop10h 25m

Sat 12/1208:05 -

2 stops37h 05m

Deal found 8/10£624

Tue 17/1118:35 -

Nonstop7h 00m

Sun 22/1110:35 -

Nonstop8h 10m

Deal found 12/10£625

Fri 4/1208:34 -

2 stops26h 26m

Sun 6/1206:40 -

2 stops21h 25m

Deal found 8/10£626

Mon 23/1117:40 -

1 stop10h 25m

Mon 30/1108:05 -

2 stops37h 05m

Deal found 9/10£628

Wed 2/1217:40 -

1 stop9h 25m

Mon 7/1208:05 -

2 stops37h 05m

Deal found 8/10£634

Wed 2/1208:34 -

2 stops28h 56m

Sun 6/1206:40 -

2 stops21h 25m

Deal found 10/10£636

Mon 23/1117:40 -

1 stop21h 10m

Sat 5/1209:45 -

2 stops35h 25m

Deal found 8/10£638

Thu 3/1218:35 -

Nonstop7h 00m

Mon 7/1207:30 -

1 stop13h 05m

Deal found 12/10£639

Tue 8/1217:40 -

1 stop9h 25m

Mon 14/1218:35 -

2 stops26h 35m

Deal found 8/10£640

Wed 18/1110:37 -

3 stops26h 53m

Wed 25/1106:40 -

2 stops22h 50m

Deal found 11/10£642

Find flight deals from Philadelphia to Heathrow

Round-trip from	£618
One-way from	£242
Popular in	June
Cheapest in	February
Average price	£828
Good round-trip deal	£616 or less

Air Canada
10/1-13/1
4 total stops
57h 29m total
Philadelphia to London

Search Deals

JetBlue
22/10-31/12
1 total stop
19h 00m total
Philadelphia to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£168 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a round-trip flight from Philadelphia to London Heathrow.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 10/12

09:30-06:55

1 stop16h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£249

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 10/1

09:30-06:55

1 stop16h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£252

Fastest return journey

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 10/1

18:35-06:35

Nonstop7h 00m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£265

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 6/1

08:25-11:40

1 stop22h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£268

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 6/1

06:24-09:10

2 stops21h 46m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£268

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 9/1

17:05-06:30

1 stop32h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£271

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 9/1

18:35-06:35

Nonstop7h 00m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£302

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 12/11

10:27-06:55

1 stop15h 28m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£320

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Mon 4/1

09:29-06:56

1 stop16h 27m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£320

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 15/12

09:30-06:55

1 stop16h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£361

Flights are sorted by cheapest return flights first.

Deals found on 7/10

Showing 1-10 of 24 resultsSorted by cheapest first

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.

PHL-LHR

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to London Heathrow Airport

Prices

Airlines

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

The best time to book flights from Philadelphia to London Heathrow Airport is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £543). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,127). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to LHR?

When flying from Philadelphia to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Airfare is below average for this route at the moment.

Philadelphia to London Heathrow Airport flights typically cost between £729 and £1,047 in January.
The cheapest return price found within the last 5 days was £618 on Multiple Airlines (10 Jan–13 Jan).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with British Airways from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

British Airways

6.7

Okay

8,260 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.

British Airways

6.7

Okay

8,260 reviews

British Airways

6.7

Okay

8,260 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

IAH - LHR

Related info for your journey

What airport do you fly from for flights from Philadelphia to London Heathrow?
Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 13 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.
How long is the flight from Philadelphia to London Heathrow Airport?
For as low as £674, JetBlue can have you in London Heathrow Airport from Philadelphia in 11h 20m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What is the cheapest airline to fly from Philadelphia to London Heathrow Airport round-trip?
Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £518 on this airline. Users have found that British Airways is 33% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Malaysia Airlines (92%), American Airlines (88%) or British Airways (88%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.
What are the cheapest flights from Philadelphia to London Heathrow Airport?
The cheapest flight price from Philadelphia to London Heathrow Airport is £533. On average you can expect to pay £777. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £516.
Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?
Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.
Can I find deals for business class flights from Philadelphia to Heathrow?
Yes. Cheapflights offers flight deals from Philadelphia to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £543). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,127). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Hounslow

Milton Keynes

Luton

Slough

Gatwick

Wembley

Hayes

Ilford

Croydon

Colchester

Northampton

Eastbourne

Brentford

Southend-on-Sea

Barnet

Enfield

Southall

Watford

Stratford-upon-Avon

Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to England

Flights by cabin class

Heathrow flight routes

Other flight options

Popular flights

Alternative routes for Philadelphia to Heathrow

John F Kennedy Intl to Heathrow flights

Newark to Heathrow flights

John F Kennedy Intl to Gatwick flights

LaGuardia to Heathrow flights

Newark to Gatwick flights

John F Kennedy Intl to Stansted flights

John F Kennedy Intl to London City flights

Dulles Intl to Heathrow flights

LaGuardia to Gatwick flights

Newark to London City flights

Newark to Stansted flights

Newark to Luton flights

Reagan-National to Heathrow flights

Dulles Intl to Gatwick flights

Dulles Intl to London City flights

Reagan-National to Gatwick flights

Dulles Intl to Luton flights

LaGuardia to Stansted flights

Reagan-National to Luton flights

Philadelphia to Gatwick flights

Philadelphia to Stansted flights

Pittsburgh to Heathrow flights

Philadelphia to Luton flights

Reagan-National to Stansted flights

Pittsburgh to Gatwick flights

Pittsburgh to London City flights

Pittsburgh to Luton flights

John F Kennedy Intl to Southend flights

Harrisburg to Heathrow flights

State College to Heathrow flights

Elmira to Heathrow flights

Top airline flying from Philadelphia to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£518	Average£822	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Fly with Cheapflights

How does Cheapflights help users find flights from Philadelphia to Heathrow?

Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Philadelphia to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Philadelphia? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Philadelphia to Heathrow become cheaper?

Yes! Start tracking prices for Philadelphia to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Philadelphia to London Heathrow Airport from £242

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Philadelphia to Heathrow

Cheapest flights from Philadelphia to HeathrowExplore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Best flights from Philadelphia to HeathrowDiscover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Direct flights from Philadelphia to HeathrowExplore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Explore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Last-minute flights from Philadelphia to HeathrowDiscover last-minute flight deals from Philadelphia to Heathrow. Data last updated 12 October 2026 and is based on user searches.

Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 12 October 2026 and is based on user searches.

One-way flights from Philadelphia to HeathrowSearch for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Find flight deals from Philadelphia to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.

Cheapflights Insights

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

The best time to book flights from Philadelphia to London Heathrow Airport is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

What is the cheapest time of day to fly from PHL to LHR?

When flying from Philadelphia to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Airfare is below average for this route at the moment.

Philadelphia to London Heathrow Airport flights typically cost between £729 and £1,047 in January.The cheapest return price found within the last 5 days was £618 on Multiple Airlines (10 Jan–13 Jan).

Weekly flight availability from Philadelphia to London Heathrow Airport

The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with British Airways from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Philadelphia to London Heathrow?

How long is the flight from Philadelphia to London Heathrow Airport?

What is the cheapest airline to fly from Philadelphia to London Heathrow Airport round-trip?

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

What are the cheapest flights from Philadelphia to London Heathrow Airport?

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

How can I find direct flights from Philadelphia to Heathrow?

Can I find deals for business class flights from Philadelphia to Heathrow?

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Philadelphia to Heathrow by cabin class

Find flights from Philadelphia to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 October 2026.

Philadelphia and Heathrow flights

Browse other Philadelphia and Heathrow flight options. Last updated on 12 October 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top airline flying from Philadelphia to Heathrow

Fly with Cheapflights

How does Cheapflights help users find flights from Philadelphia to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?

Can Cheapflights find flights from Philadelphia to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Philadelphia to Heathrow become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 October 2026.

Best flights from Philadelphia to Heathrow
Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Direct flights from Philadelphia to Heathrow
Explore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 12 October 2026 and is based on user searches.

One-way flights from Philadelphia to Heathrow
Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Philadelphia to London Heathrow Airport flights typically cost between £729 and £1,047 in January.
The cheapest return price found within the last 5 days was £618 on Multiple Airlines (10 Jan–13 Jan).