Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Philadelphia to London Heathrow Airport from £206

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in October or January, booked 56 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 April 2025.

Round-trip from

£485

One-way from

£206

Popular in

June

Cheapest in

October

Average price

£567

Good round-trip deal

£548 or less

Good one-way deal

£397 or less
JetBlue
  • JetBlue
  • 1/10-9/10
  • 2 total stops
  • 25h 47m total
  • Philadelphia to London
Search Deals
27/7
  • 27/7
  • 2 total stops
  • 24h 25m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to London Heathrow.
Search Deals
Price to beat on a one-way flight from Philadelphia to London Heathrow.
Search Deals

Find flight deals from Philadelphia to Heathrow

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 30 April 2025.

Wed 1/1015:00PHL - LHR
1 stop10h 30mJetBlue
Thu 9/1008:25LHR - PHL
1 stop15h 17mJetBlue
Deal found 29/4£485
Mon 22/922:20PHL - LHR
Nonstop7h 00mIberia
Tue 14/1013:30LHR - PHL
Nonstop7h 55mIberia
Deal found 29/4£489
Wed 20/819:40PHL - LHR
Nonstop7h 15mAmerican Airlines
Wed 27/807:50LHR - PHL
1 stop13h 00mAmerican Airlines
Deal found 29/4£494
Tue 2/920:30PHL - LHR
1 stop11h 00mMultiple Airlines
Tue 16/906:20LHR - PHL
1 stop17h 40mMultiple Airlines
Deal found 29/4£498
Wed 15/1016:00PHL - LHR
2 stops19h 00mScandinavian Airlines
Mon 20/1018:40LHR - PHL
2 stops31h 36mScandinavian Airlines
Deal found 29/4£509
Wed 27/813:15PHL - LHR
1 stop13h 50mDelta
Fri 5/906:15LHR - PHL
2 stops15h 59mDelta
Deal found 29/4£514
Tue 6/506:00PHL - LHR
1 stop19h 30mIcelandair
Wed 14/508:15LHR - PHL
2 stops19h 06mIcelandair
Deal found 29/4£529
Wed 20/819:40PHL - LHR
Nonstop7h 15mBritish Airways
Wed 3/908:40LHR - PHL
1 stop10h 20mBritish Airways
Deal found 29/4£538
Tue 22/720:30PHL - LHR
1 stop9h 40mAer Lingus
Wed 30/713:25LHR - PHL
1 stop10h 35mAer Lingus
Deal found 29/4£557
Fri 22/822:25PHL - LHR
Nonstop6h 55mFinnair
Fri 29/807:15LHR - PHL
1 stop14h 10mFinnair
Deal found 29/4£559
Wed 8/1015:25PHL - LHR
1 stop10h 05mUnited Airlines
Tue 14/1014:05LHR - PHL
2 stops29h 11mUnited Airlines
Deal found 29/4£559
Tue 30/910:10PHL - LHR
2 stops15h 20mAir Canada
Tue 7/1006:50LHR - PHL
2 stops12h 48mAir Canada
Deal found 29/4£565

Cheapflights Fare Finder

Customise your flight search to find flights from Philadelphia to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 April 2025.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Philadelphia

Fly to

Heathrow

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 1/10

15:00-06:30

1 stop10h 30m

London Heathrow

Thu 9/10

08:25-18:42

1 stop15h 17m

£485

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 27/8

22:25-10:20

Nonstop6h 55m

London Heathrow

Fri 5/9

12:30-15:25

Nonstop7h 55m

£489

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 20/8

19:40-07:55

Nonstop7h 15m

London Heathrow

Wed 27/8

07:50-15:50

1 stop13h 00m

£494

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 2/9

20:30-12:30

1 stop11h 00m

London Heathrow

Tue 16/9

06:20-19:00

1 stop17h 40m

£498

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/10

16:00-16:00

2 stops19h 00m

London Heathrow

Mon 20/10

18:40-21:16

2 stops31h 36m

£509

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 27/8

13:15-08:05

1 stop13h 50m

London Heathrow

Fri 5/9

06:15-17:14

2 stops15h 59m

£514

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 20/8

19:40-07:55

Nonstop7h 15m

London Heathrow

Wed 3/9

08:40-14:00

1 stop10h 20m

£538

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 22/7

20:30-11:10

1 stop9h 40m

London Heathrow

Wed 30/7

13:25-19:00

1 stop10h 35m

£557

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 22/8

22:25-10:20

Nonstop6h 55m

London Heathrow

Fri 29/8

07:15-16:25

1 stop14h 10m

£559

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/10

15:25-09:35

1 stop13h 10m

London Heathrow

Wed 15/10

14:05-14:16

2 stops29h 11m

£559

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 30 results
1
2
3

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.
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

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

Use this chart to determine the optimal time to book a return flight from Philadelphia to Heathrow. Price data was last updated on 25 April 2025.

The best time to book flights from Philadelphia to London Heathrow Airport is 56 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, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.

Weekly flight availability from Philadelphia to London Heathrow Airport

Explore weekly flight availability from Philadelphia to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 30 April 2025.

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

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

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.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 30 April 2025.
Peruse reviews from past customers who have flown with Delta, Finnair and Austrian Airlines from Philadelphia to London to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,936 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 15 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

  • What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

    Our cheapest airline available from Philadelphia to London Heathrow Airport is JetBlue. Our recent data shows that you can find tickets from as low as £485 on this airline. Additional options worth looking into are Iberia and American Airlines, starting at £489 and £494 round-trip. Users have found that JetBlue is 23% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?

    The cheapet airlines for a one-way flight from Philadelphia to London Heathrow Airport are JetBlue (£238), Aer Lingus (£304), and American Airlines (£327).

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

    Consider Malaysia Airlines (76%), American Airlines (76%) or Finnair (76%) 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 £387. On average you can expect to pay £662. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £447.

  • 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, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Deal
Hounslow
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Northampton
Ilford
Hayes
Southend-on-Sea
Crawley
Wembley
Ipswich
Maidstone
Winchester
Swindon
Folkestone
Dartford

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.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
LaGuardia to Gatwick flights
Newark to London City flights
John F Kennedy Intl to Stansted flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Reagan-National to Gatwick flights
Newark to Stansted flights
Newark to Luton flights
Pittsburgh to Heathrow flights
Philadelphia to Gatwick flights
Dulles Intl to Luton flights
Pittsburgh to Gatwick flights
Pittsburgh to London City flights
Philadelphia to Stansted flights
Reagan-National to Stansted flights
Philadelphia to Luton flights
LaGuardia to Stansted flights
Reagan-National to Luton flights
Harrisburg to Heathrow flights
State College to Heathrow flights
Pittsburgh to Luton flights
John F Kennedy Intl to Southend flights
Elmira to Heathrow flights

Top 4 airlines flying from Philadelphia to Heathrow

Discover the top 4 airlines that operate flights from Philadelphia to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest£435Average£575FlexibilityNo cancel feeOn-time77%
Search Iberia flights
JetBlueCheapest£452Average£524FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£457Average£577FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£492Average£733FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.
Site
©2025 Cheapflights