How does KAYAK find such low prices on flights from Pennsylvania to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to London.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Pennsylvania to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Pennsylvania with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

£213 CHEAP FLIGHTS from Pennsylvania to London

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Cheap Flights from Pennsylvania to London

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Direct

Recent return flight deals from Pennsylvania to London

Mon, 7 Dec - Wed, 9 Dec

17:39 - 12:00MDT Harrisburg-LHR London Heathrow

13h 21m1 stop Chicago O'Hare Intl

11:05 - 16:58LHR London Heathrow-MDT Harrisburg

34h 53m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£556United Airlines

Tue, 20 Oct - Fri, 13 Nov

11:44 - 06:25MDT Harrisburg-LHR London Heathrow

13h 41m1 stop Atlanta Hartsfield-Jackson

06:30 - 17:37LHR London Heathrow-MDT Harrisburg

16h 07m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£557Multiple Airlines

Wed, 21 Oct - Fri, 13 Nov

12:13 - 07:10MDT Harrisburg-LHR London Heathrow

13h 57m1 stop Detroit Metropolitan Wayne County

06:30 - 17:37LHR London Heathrow-MDT Harrisburg

16h 07m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£557KLM

Tue, 20 Oct - Thu, 12 Nov

11:44 - 06:25MDT Harrisburg-LHR London Heathrow

13h 41m1 stop Atlanta Hartsfield-Jackson

11:30 - 23:50LHR London Heathrow-MDT Harrisburg

17h 20m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

£557Air France

Wed, 21 Oct - Thu, 12 Nov

12:13 - 07:10MDT Harrisburg-LHR London Heathrow

13h 57m1 stop Detroit Metropolitan Wayne County

06:30 - 23:06LHR London Heathrow-MDT Harrisburg

21h 36m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

£557Delta

Tue, 20 Oct - Wed, 11 Nov

11:44 - 07:15MDT Harrisburg-LHR London Heathrow

14h 31m1 stop Atlanta Hartsfield-Jackson

06:30 - 16:18LHR London Heathrow-MDT Harrisburg

14h 48m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

£557Delta

Tue, 20 Oct - Wed, 11 Nov

06:13 - 06:25MDT Harrisburg-LHR London Heathrow

19h 12m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

06:30 - 23:06LHR London Heathrow-MDT Harrisburg

21h 36m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

£560Delta

Wed, 21 Oct - Wed, 28 Oct

10:05 - 08:35PHL Philadelphia-LHR London Heathrow

17h 30m2 stops Montreal Pierre Elliott Trudeau Intl Ottawa

09:00 - 14:44LHR London Heathrow-PHL Philadelphia

33h 44m2 stops Halifax Intl Montreal Pierre Elliott Trudeau Intl

£594Air Canada

Fri, 23 Oct - Fri, 30 Oct

17:32 - 08:00PHL Philadelphia-LHR London Heathrow

9h 28m1 stop Boston Logan Intl

06:30 - 14:50LHR London Heathrow-PHL Philadelphia

12h 20m1 stop Dublin

£595British Airways

Mon, 12 Oct - Tue, 20 Oct

18:45 - 06:50PHL Philadelphia-LHR London Heathrow

7h 05mdirect

13:45 - 16:40LHR London Heathrow-PHL Philadelphia

7h 55mdirect

£595British Airways

Recent last minute flight deals from Pennsylvania to London

Wed, 30 Sep - Mon, 5 Oct

15:25 - 06:30PHL Philadelphia-LHR London Heathrow

10h 05m1 stop Montreal Pierre Elliott Trudeau Intl

17:55 - 14:47LHR London Heathrow-PHL Philadelphia

25h 52m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

£595Air Canada

Wed, 30 Sep - Mon, 5 Oct

15:25 - 06:30PHL Philadelphia-LHR London Heathrow

10h 05m1 stop Montreal Pierre Elliott Trudeau Intl

17:55 - 14:47LHR London Heathrow-PHL Philadelphia

25h 52m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

£596Air Canada

Mon, 28 Sep - Mon, 5 Oct

17:40 - 13:00PHL Philadelphia-LHR London Heathrow

14h 20m2 stops Frankfurt am Main Zurich

18:40 - 16:05LHR London Heathrow-PHL Philadelphia

26h 25m2 stops Zurich Frankfurt am Main

£599SWISS

Thu, 1 Oct - Tue, 6 Oct

20:25 - 12:40PHL Philadelphia-LHR London Heathrow

11h 15m1 stop Dublin

13:25 - 18:55LHR London Heathrow-PHL Philadelphia

10h 30m1 stop Dublin

£599Aer Lingus

Tue, 29 Sep - Tue, 20 Oct

17:40 - 16:25PHL Philadelphia-LHR London Heathrow

17h 45m2 stops Frankfurt am Main Zurich

20:05 - 16:05LHR London Heathrow-PHL Philadelphia

25h 00m2 stops Zurich Frankfurt am Main

£600SWISS

Thu, 1 Oct - Tue, 6 Oct

20:25 - 13:30PHL Philadelphia-LHR London Heathrow

12h 05m1 stop Dublin

13:25 - 18:55LHR London Heathrow-PHL Philadelphia

10h 30m1 stop Dublin

£603Aer Lingus

Tue, 29 Sep - Fri, 16 Oct

12:29 - 07:15PHL Philadelphia-LHR London Heathrow

13h 46m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

16:05 - 22:07LHR London Heathrow-PHL Philadelphia

11h 02m1 stop Boston Logan Intl

£603Delta

Mon, 28 Sep - Mon, 5 Oct

20:25 - 12:40PHL Philadelphia-LHR London Heathrow

11h 15m1 stop Dublin

13:25 - 18:55LHR London Heathrow-PHL Philadelphia

10h 30m1 stop Dublin

£603Aer Lingus

Thu, 1 Oct - Tue, 13 Oct

21:45 - 10:05PIT Pittsburgh-LHR London Heathrow

7h 20mdirect

16:40 - 19:50LHR London Heathrow-PIT Pittsburgh

8h 10mdirect

£626British Airways

Thu, 1 Oct - Tue, 13 Oct

21:45 - 10:05PIT Pittsburgh-LHR London Heathrow

7h 20mdirect

09:45 - 23:43LHR London Heathrow-PIT Pittsburgh

18h 58m1 stop Chicago O'Hare Intl

£631British Airways

Useful Info

Low season	February
High season	March
Cheapest flight	£213

Best time to beat the crowds (15% less expensive on average)

Most popular time to fly and prices are also 23% lower on average.

Flight from Philadelphia to London Heathrow Airport

Verified travelerFlew with American Airlines-Jun 2025

Make sure you do not need the transit visa.

LisaFlew with British Airways-May 2025

Make sure you have enough time in London if you have a transfer flight. I would recommend at least 2 hours.

RadicalFlew with American Airlines-May 2025

Don’t put everything in your gate check bags. Make sure you have clothes in your carry on

Verified travelerFlew with British Airways-Oct 2024

Eat well before boarding if you’re a picky eater.

GlennFlew with British Airways-Jun 2024

British airways could have many delays, ensure there's enough time for the layover

Verified travelerFlew with British Airways-Mar 2024

Go British Air. The nonstop flight is a huge bonus as there are very few such flights to Europe from Pittsburgh. Study the Underground and use it for transportation while there. After you’ve seen the most famous London sights, visit one of the smaller museums, like the John Soames Museum or the Leighton House Museum. Have a drink at the bar on the top floor of the National Portrait Gallery.

How does KAYAK find such low prices on flights from Pennsylvania to London?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to London.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Pennsylvania to London?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Pennsylvania with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to London?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Gatwick

Eastbourne

Milton Keynes

Hounslow

Luton

Southend-on-Sea

Newport

Folkestone

Winchester

Croydon

Slough

Stansted

Colchester

Chichester

Crawley

Maidstone

Hastings

Chelmsford

Bedford

Richmond

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£213 Find Cheap Flights from Pennsylvania to London – Compare and Save

Cheap Flights from Pennsylvania to London

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Flights from Pennsylvania to London: the best tips from KAYAK users

FAQs for booking flights from Pennsylvania to London

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More options for your flight to London

Complete your trip to London with a hotel stay or car hire

Cabin class types available on flights to Pennsylvania

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