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Cheap flights from London Heathrow Airport to Philadelphia from £396

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
21 Jul — 28 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or September, booked 85 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 16 July 2025.

Round-trip from

£460

One-way from

£396

Popular in

July

Cheapest in

March

Average price

£689

Good round-trip deal

£525 or less

Good one-way deal

£704 or less
Icelandair
  • Icelandair
  • 1/11-8/11
  • 2 total stops
  • 31h 12m total
  • London to Philadelphia
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13/9
  • 13/9
  • 2 total stops
  • 30h 11m total
  • London to Philadelphia
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Highest demand for flights based on searches. 11% potential increase in price (£53 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from London Heathrow to Philadelphia.
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Price to beat on a one-way flight from London Heathrow to Philadelphia.
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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 16 July 2025.

Sat 1/1109:20LHR - PHL
1 stop11h 17mIcelandair
Sat 8/1106:00PHL - LHR
1 stop19h 55mIcelandair
Deal found 14/7£460
Fri 15/808:25LHR - PHL
1 stop13h 30mJetBlue
Tue 19/810:15PHL - LHR
1 stop15h 15mJetBlue
Deal found 14/7£462
Mon 4/818:15LHR - PHL
1 stop24h 35mFinnair
Tue 2/915:55PHL - LHR
1 stop10h 25mFinnair
Deal found 14/7£463
Wed 29/1006:30LHR - PHL
1 stop12h 25mBritish Airways
Wed 25/320:45PHL - LHR
Nonstop7h 05mBritish Airways
Deal found 15/7£464
Tue 9/913:30LHR - PHL
2 stops30h 08mUnited Airlines
Thu 18/910:30PHL - LHR
1 stop19h 10mUnited Airlines
Deal found 15/7£465
Fri 29/809:30LHR - PHL
1 stop17h 37mAir Canada
Fri 5/915:25PHL - LHR
1 stop10h 05mAir Canada
Deal found 15/7£467
Fri 29/810:30LHR - PHL
1 stop11h 40mMultiple Airlines
Fri 5/915:25PHL - LHR
1 stop10h 05mMultiple Airlines
Deal found 15/7£477
Tue 30/906:30LHR - PHL
1 stop14h 30mLufthansa
Sat 4/1016:50PHL - LHR
2 stops35h 45mLufthansa
Deal found 15/7£480
Wed 29/1008:50LHR - PHL
2 stops18h 13mVirgin Atlantic
Wed 25/313:00PHL - LHR
2 stops13h 25mVirgin Atlantic
Deal found 15/7£489

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 16 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

Sat 1/11

09:20-16:37

1 stop11h 17m

Philadelphia

Sat 8/11

06:00-06:55

1 stop19h 55m

£460

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 15/8

08:25-16:55

1 stop13h 30m

Philadelphia

Tue 19/8

10:15-06:30

1 stop15h 15m

£462

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/8

18:15-13:50

1 stop24h 35m

Philadelphia

Tue 2/9

15:55-07:20

1 stop10h 25m

£463

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 29/10

06:30-14:55

1 stop12h 25m

Philadelphia

Wed 25/3

20:45-07:50

Nonstop7h 05m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/9

13:30-14:38

2 stops30h 08m

Philadelphia

Thu 18/9

10:30-10:40

1 stop19h 10m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 29/8

09:30-22:07

1 stop17h 37m

Philadelphia

Fri 5/9

15:25-06:30

1 stop10h 05m

£467

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 29/8

10:30-17:10

1 stop11h 40m

Philadelphia

Fri 5/9

15:25-06:30

1 stop10h 05m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 30/9

06:30-16:00

1 stop14h 30m

Philadelphia

Sat 4/10

16:50-09:35

2 stops35h 45m

£480

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 29/10

08:50-23:03

2 stops18h 13m

Philadelphia

Wed 25/3

13:00-06:25

2 stops13h 25m

£489

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 13/9

09:55-11:06

2 stops30h 11m

£396

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 11 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 11 July 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 85 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 16 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 at midday.

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 13 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 16 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 16 July 2025.
Get a feel of what it's like to fly with Finnair, United Airlines, andVirgin Atlantic 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
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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
1,316 reviews
Finnair
7.6
Good
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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
8,863 reviews
Finnair
7.6
Good
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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.
Virgin Atlantic
7.4
Good
655 reviews
Finnair
7.6
Good
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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
2,909 reviews
Finnair
7.6
Good
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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
9,731 reviews
Finnair
7.6
Good
1,316 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Overall

7.6

Comfort

7.5

Crew

8.1

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 £460 on this airline. Additional options worth looking into are JetBlue and Finnair, starting at £462 and £463 round-trip. Icelandair is currently priced 18% below the average price you’ll pay for this route.

  • 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 £450. On average you can expect to pay £2,387. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £325.

  • 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

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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 16 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 16 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£302Average£368FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IcelandairCheapest£335Average£473FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£338Average£477FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
JetBlueCheapest£355Average£478FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£413Average£503FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£433Average£548FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£443Average£562FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£454Average£591FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapest£464Average£668FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£464Average£628FlexibilityNo 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.

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