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Cheap flights from Philadelphia to London Heathrow Airport from £288

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
16 Dec — 23 Dec1
1 adult

The best prices from Philadelphia to London Heathrow are usually found in October or January, booked 56 days in advance, depart on a Sunday or Tuesday 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 11 December 2024.

Round-trip from

£495

One-way from

£288

Popular in

June

Cheapest in

October

Average price

£796
JetBlue
  • JetBlue
  • 8/3-16/3
  • 2 total stops
  • 27h 40m total
  • Philadelphia to London
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JetBlue
  • JetBlue
  • 10/1
  • 1 total stop
  • 13h 45m total
  • Philadelphia to London
Search Deals
High demand for flights, 17% potential price rise
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Best time to find cheap flights, 3% potential price drop
Search Deals
Average for round-trip flights in December 2024
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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 11 December 2024.

Tue 31/1208:15PHL - LHR
1 stop16h 40mJetBlue
Mon 13/108:25LHR - PHL
1 stop15h 42mJetBlue
Deal found 10/12£497
Tue 31/1218:30PHL - LHR
1 stop12h 30mBritish Airways
Mon 13/118:15LHR - PHL
1 stop27h 25mBritish Airways
Deal found 10/12£553
Tue 31/1216:25PHL - LHR
1 stop11h 05mMultiple Airlines
Mon 13/119:30LHR - PHL
2 stops24h 20mMultiple Airlines
Deal found 10/12£557
Tue 31/1213:14PHL - LHR
1 stop16h 21mVirgin Atlantic
Mon 13/112:30LHR - PHL
1 stop15h 22mVirgin Atlantic
Deal found 10/12£559
Tue 31/1211:00PHL - LHR
1 stop15h 55mKLM
Mon 13/112:20LHR - PHL
1 stop16h 00mKLM
Deal found 10/12£583
Tue 31/1215:30PHL - LHR
1 stop10h 40mAir Canada
Mon 13/115:00LHR - PHL
1 stop28h 50mAir Canada
Deal found 10/12£586
Tue 31/1215:00PHL - LHR
1 stop10h 40mUnited Airlines
Mon 13/113:30LHR - PHL
1 stop31h 30mUnited Airlines
Deal found 10/12£587
Tue 31/1218:35PHL - LHR
1 stop12h 05mIberia
Mon 13/119:10LHR - PHL
1 stop26h 10mIberia
Deal found 10/12£592
Tue 31/1213:47PHL - LHR
1 stop13h 03mAmerican Airlines
Mon 13/110:15LHR - PHL
Nonstop8h 15mAmerican Airlines
Deal found 10/12£608
Tue 31/1221:15PHL - LHR
Nonstop7h 05mFinnair
Mon 13/119:00LHR - PHL
1 stop24h 05mFinnair
Deal found 10/12£619
Tue 31/1208:15PHL - LHR
2 stops20h 00mAer Lingus
Mon 13/116:20LHR - PHL
2 stops31h 47mAer Lingus
Deal found 10/12£742
Tue 31/1217:35PHL - LHR
2 stops33h 30mSWISS
Mon 13/112:05LHR - PHL
2 stops38h 35mSWISS
Deal found 10/12£764

Find flights from Philadelphia to Heathrow within your budget

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 886,240 searches. Data last updated 11 December 2024.

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Fly to

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Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/3

10:13-05:55

1 stop14h 42m

London Heathrow

Sun 16/3

08:25-17:23

1 stop12h 58m

£495

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 30/1

14:37-07:10

3 stops35h 33m

London Heathrow

Tue 4/2

13:45-18:55

3 stops34h 10m

£506

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 4/2

11:20-09:20

2 stops17h 00m

London Heathrow

Wed 12/2

06:40-00:49

2 stops23h 09m

£527

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/1

21:21-09:20

Nonstop6h 59m

London Heathrow

Wed 22/1

10:40-16:40

1 stop11h 00m

£532

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 5/3

21:16-09:20

Nonstop7h 04m

London Heathrow

Wed 12/3

07:25-17:00

1 stop13h 35m

£535

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 10/2

16:04-09:30

1 stop12h 26m

London Heathrow

Wed 12/2

08:25-15:35

1 stop12h 10m

£546

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/1

15:30-07:10

1 stop10h 40m

London Heathrow

Wed 22/1

06:30-22:36

2 stops21h 06m

£556

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 31/12

13:14-10:35

1 stop16h 21m

London Heathrow

Mon 13/1

12:30-22:52

1 stop15h 22m

£559

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 12/1

18:40-06:35

Nonstop6h 55m

London Heathrow

Tue 21/1

10:15-13:30

Nonstop8h 15m

£564

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 13/1

09:00-07:10

2 stops17h 10m

London Heathrow

Thu 15/5

06:50-14:36

2 stops12h 46m

£571

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 29 results
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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.

Travel insights for flights from Philadelphia to Heathrow

Get recent, data-driven insights about flights from Philadelphia to Heathrow including ideal travel times, pricing trends, and more.

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 6 December 2024.

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 July is currently the most expensive (average of £160). 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 11 December 2024.

Unlike in the evening, when flights are generally more expensive, you can save up to 18% 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 11 December 2024.

The most flights from PHL to LHR are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 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 11 December 2024.
Peruse reviews from past customers who have flown with JetBlue, British Airways and Iberia 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
8,650 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

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

Delta
8.0
Very Good
8,650 reviews
Delta
8.0
Very Good
8,650 reviews
Check prices

Comfort

7.9

Boarding

8.2</