Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Philadelphia from £386

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Philadelphia (PHL). 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 11 July 2025.

Round-trip from

£455

One-way from

£386

Popular in

July

Cheapest in

March

Average price

£685

Good round-trip deal

£519 or less

Good one-way deal

£673 or less
3/9-7/9
  • 3/9-7/9
  • 4 total stops
  • 62h 51m total
  • London to Philadelphia
Search Deals
13/11
  • 13/11
  • 2 total stops
  • 36h 09m total
  • London to Philadelphia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Philadelphia.
Search Deals
Price to beat on a one-way flight from London Heathrow to Philadelphia.
Search Deals

Find flight deals from Heathrow to Philadelphia

Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Wed 3/906:40LHR - PHL
2 stops33h 26mMultiple Airlines
Sun 7/907:15PHL - LHR
2 stops29h 25mMultiple Airlines
Deal found 9/7£455
Sat 18/1008:25LHR - PHL
1 stop14h 20mIcelandair
Fri 24/1015:10PHL - LHR
1 stop10h 20mIcelandair
Deal found 10/7£456
Sat 20/908:25LHR - PHL
1 stop17h 59mJetBlue
Wed 24/915:10PHL - LHR
1 stop10h 20mJetBlue
Deal found 9/7£457
Wed 6/807:55LHR - PHL
1 stop11h 10mFinnair
Tue 19/815:55PHL - LHR
2 stops15h 20mFinnair
Deal found 9/7£461
Mon 17/1107:50LHR - PHL
1 stop11h 05mBritish Airways
Mon 1/1219:45PHL - LHR
Nonstop7h 05mBritish Airways
Deal found 10/7£469
Thu 27/1106:30LHR - PHL
1 stop14h 30mUnited Airlines
Thu 4/1219:58PHL - LHR
1 stop9h 52mUnited Airlines
Deal found 10/7£471
Thu 2/1006:50LHR - PHL
2 stops12h 48mAir Canada
Mon 13/1015:25PHL - LHR
1 stop13h 10mAir Canada
Deal found 11/7£472
Thu 11/909:30LHR - PHL
1 stop11h 30mLufthansa
Thu 18/910:10PHL - LHR
2 stops15h 45mLufthansa
Deal found 9/7£474
Thu 27/1106:00LHR - PHL
2 stops20h 21mSWISS
Thu 4/1213:15PHL - LHR
2 stops37h 50mSWISS
Deal found 10/7£477

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Philadelphia 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 11 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Heathrow

Fly to

Philadelphia

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 3/9

06:40-11:06

2 stops33h 26m

Philadelphia

Sun 7/9

07:15-17:40

2 stops29h 25m

£455

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 20/9

08:25-21:24

1 stop17h 59m

Philadelphia

Wed 24/9

15:10-06:30

1 stop10h 20m

£457

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 6/8

07:55-14:05

1 stop11h 10m

Philadelphia

Tue 19/8

15:55-12:15

2 stops15h 20m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 29/8

08:15-16:55

2 stops37h 40m

Philadelphia

Thu 11/9

15:10-06:30

1 stop10h 20m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 2/10

06:50-14:38

2 stops12h 48m

Philadelphia

Mon 13/10

15:25-09:35

1 stop13h 10m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

09:30-22:07

1 stop17h 37m

Philadelphia

Tue 9/9

06:30-06:20

1 stop18h 50m

£473

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

09:30-16:00

1 stop11h 30m

Philadelphia

Thu 18/9

10:10-06:55

2 stops15h 45m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 15/9

10:05-13:05

Nonstop8h 00m

Philadelphia

Mon 16/2

19:45-07:50

Nonstop7h 05m

£488

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

10:05-13:10

Nonstop8h 05m

Philadelphia

Tue 9/9

19:50-08:05

Nonstop7h 15m

£490

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 17/9

06:30-16:52

2 stops15h 22m

Philadelphia

Thu 25/9

13:35-06:45

1 stop12h 10m

£501

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 12 results
1
2

Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow 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 London Heathrow Airport to Philadelphia

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Philadelphia. Price data was last updated on 27 June 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 79 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). 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 LHR to PHL?

Find hourly flight availability from Heathrow to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Philadelphia. Price data was last updated on 6 July 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London Heathrow Airport to Philadelphia

Explore weekly flight availability from Heathrow to Philadelphia. 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 11 July 2025.

The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 on average).

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

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated 11 July 2025.
Get a feel of what it's like to fly with Finnair, SWISS, andUnited Airlines from London Heathrow Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,312 reviews
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
SWISS
7.5
Good
1,655 reviews
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
8,846 reviews
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
JetBlue
7.3
Good
2,914 reviews
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Air Canada
7.1
Good
9,696 reviews
Finnair
7.6
Good
1,312 reviews
Check prices

Entertainment

6.9

Comfort

7.5

Crew

8.1

Boarding

7.6

Overall

7.6

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Philadelphia. 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 into for flights to Philadelphia from London Heathrow?

    Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 14 inbound flights from London Heathrow per day from 11 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

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

    Our cheapest airline available from London Heathrow Airport to Philadelphia is Icelandair. Our recent data shows that you can find tickets from as low as £456 on this airline. Additional options worth looking into are JetBlue and Finnair, starting at £457 and £461 round-trip. Icelandair is currently priced 18% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as £399. However, be on the lookout for offers from Aer Lingus and Icelandair, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.

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

    Consider Malaysia Airlines (76%), American Airlines (76%) or Finnair (76%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

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

    The cheapest flight price from London Heathrow Airport to Philadelphia is £446. On average you can expect to pay £2,412. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £340.

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

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

  • How can I find direct flights from Heathrow to Philadelphia?

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Philadelphia 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 London Heathrow Airport to Philadelphia?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). 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

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.

Fly from Heathrow to Philadelphia on these airlines

Choose from the following airlines for your flight from Heathrow to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 11 July 2025.
British Airways flights from London Heathrow to Philadelphia
Finnair flights from London Heathrow to Philadelphia
Iberia flights from London Heathrow to Philadelphia

Top 10 airlines flying from Heathrow to Philadelphia

Discover the top 10 airlines that operate flights from Heathrow to Philadelphia. 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£298Average£347FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IcelandairCheapest£331Average£467FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£333Average£471FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
JetBlueCheapest£350Average£471FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£408Average£496FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£427Average£540FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£437Average£555FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£448Average£584FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapest£458Average£634FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£458Average£620FlexibilityNo 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 Heathrow to Philadelphia?

When you search for this flight from Heathrow to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Philadelphia 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 Heathrow to Philadelphia with no change fees?

Need flexible booking options for your flight to Philadelphia from Heathrow? 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 Heathrow to Philadelphia become cheaper?

Yes! Start tracking prices for Heathrow to Philadelphia 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