£142 Find Cheap Flights from Pennsylvania to London – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 18/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Pennsylvania to London

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Pennsylvania to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Pennsylvania to London

Fri, 9 Oct - Mon, 12 Oct
Scandinavian Airlines Logo
18:55 - 08:55JFK  New York John F Kennedy Intl-LHR London Heathrow
33h 00m2 stops Kastrup Copenhagen Stockholm Arlanda
Scandinavian Airlines Logo
07:05 - 15:40LHR  London Heathrow-JFK New York John F Kennedy Intl
13h 35m1 stop Oslo Gardermoen
£396Scandinavian Airlines
Fri, 18 Sep - Fri, 25 Sep
Norse Atlantic UK Logo
18:20 - 06:20JFK  New York John F Kennedy Intl-LGW London Gatwick
7h 00mdirect
Norse Atlantic UK Logo
13:05 - 15:55LGW  London Gatwick-JFK New York John F Kennedy Intl
7h 50mdirect
£398Norse Atlantic UK
Thu, 15 Oct - Fri, 23 Oct
Norse Atlantic UK Logo
18:20 - 06:20JFK  New York John F Kennedy Intl-LGW London Gatwick
7h 00mdirect
Norse Atlantic UK Logo
13:05 - 15:55LGW  London Gatwick-JFK New York John F Kennedy Intl
7h 50mdirect
£398Norse Atlantic UK
Fri, 22 Jan - Mon, 25 Jan
Scandinavian Airlines Logo
17:35 - 08:55JFK  New York John F Kennedy Intl-LHR London Heathrow
34h 20m2 stops Kastrup Copenhagen Stockholm Arlanda
Scandinavian Airlines Logo
06:40 - 15:45LHR  London Heathrow-JFK New York John F Kennedy Intl
14h 05m1 stop Kastrup Copenhagen
£400Scandinavian Airlines
Mon, 28 Sep - Mon, 26 Oct
British Airways Logo
18:40 - 06:50JFK  New York John F Kennedy Intl-LHR London Heathrow
7h 10mdirect
British Airways Logo
08:20 - 12:20LHR  London Heathrow-JFK New York John F Kennedy Intl
8h 00mdirect
£447British Airways
Sun, 27 Sep - Sun, 25 Oct
British Airways Logo
22:40 - 10:35JFK  New York John F Kennedy Intl-LHR London Heathrow
6h 55mdirect
British Airways Logo
12:55 - 17:00LHR  London Heathrow-JFK New York John F Kennedy Intl
8h 05mdirect
£450British Airways
Tue, 10 Nov - Sun, 15 Nov
Icelandair Logo
19:40 - 10:50IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 10m1 stop Reykjavik Keflavik Intl
Icelandair Logo
12:15 - 18:30LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
11h 15m1 stop Reykjavik Keflavik Intl
£478Icelandair
Sun, 1 Nov - Sun, 8 Nov
Icelandair Logo
19:40 - 10:50IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 10m1 stop Reykjavik Keflavik Intl
Icelandair Logo
12:15 - 18:30LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
11h 15m1 stop Reykjavik Keflavik Intl
£478Icelandair
Fri, 11 Dec - Sun, 13 Dec
American Airlines Logo
18:10 - 06:15JFK  New York John F Kennedy Intl-LHR London Heathrow
7h 05mdirect
American Airlines Logo
06:15 - 13:15LHR  London Heathrow-JFK New York John F Kennedy Intl
12h 00m1 stop Madrid Barajas
£493American Airlines
Tue, 25 Aug - Thu, 27 Aug
American Airlines Logo
19:15 - 07:20JFK  New York John F Kennedy Intl-LHR London Heathrow
7h 05mdirect
American Airlines Logo
08:55 - 16:10LHR  London Heathrow-JFK New York John F Kennedy Intl
12h 15m1 stop Barcelona-El Prat
£593American Airlines
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Good to know - Cheap tickets from Pennsylvania to London

Low season

February

Cheapest flight

£142
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly and prices are also 21% lower on average.
Flight from New York John F Kennedy Airport to London Gatwick Airport

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

Insights shared by verified travellers who flew the route from Pennsylvania to London 
Learn how KAYAK collects reviews and tips from users.
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.

FAQs for booking flights from Pennsylvania to London

  • 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Hounslow
Luton
Southend-on-Sea
Winchester
Slough
Stansted
Croydon
Folkestone
Newport
Chichester
Colchester
Maidstone
Crawley
Chelmsford
Bedford
Hastings
Richmond

Everything you need to know for your flight to London

Cabin class types available on flights to Pennsylvania

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to London
Business Class flights to Londonfrom £3,520
Premium Economy Class flights to Londonfrom £1,653
Economy class flights to Londonfrom £617