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

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 Heathrow Airport.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport 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 Heathrow Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport 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 Heathrow Airport?

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 Heathrow Airport from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$280 CHEAP FLIGHTS from Pennsylvania to London Heathrow (LHR)

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Cheap Flights from Pennsylvania to London

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

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Pennsylvania to London

Mon, Mar 1 - Tue, Mar 2

6:00 am - 5:55 amABE Allentown-Bethlehem-LHR London Heathrow

18h 55m1 stop Chicago O'Hare Intl

9:00 am - 9:13 pmLHR London Heathrow-ABE Allentown-Bethlehem

17h 13m2 stops Zurich Chicago O'Hare Intl

$758United Airlines

Tue, Feb 16 - Thu, Feb 18

3:00 pm - 10:50 amSCE State College University Park-LHR London Heathrow

14h 50m1 stop Washington, D.C. Dulles Intl

6:50 am - 9:10 pmLHR London Heathrow-SCE State College University Park

19h 20m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$762United Airlines

Thu, Jan 21 - Fri, Jan 22

9:30 am - 6:53 amPHL Philadelphia-LHR London Heathrow

16h 23m1 stop Boston Logan Intl

9:20 am - 7:38 pmLHR London Heathrow-PHL Philadelphia

15h 18m1 stop Boston Logan Intl

$818JetBlue

Sun, Jan 24 - Sat, Jan 30

9:30 am - 6:53 amPHL Philadelphia-LHR London Heathrow

16h 23m1 stop Boston Logan Intl

9:20 am - 8:06 pmLHR London Heathrow-PHL Philadelphia

15h 46m1 stop Boston Logan Intl

$818JetBlue

Mon, Dec 28 - Tue, Jan 5

3:20 pm - 7:10 amPHL Philadelphia-LHR London Heathrow

10h 50m1 stop Montreal Pierre Elliott Trudeau Intl

3:00 pm - 10:36 pmLHR London Heathrow-PHL Philadelphia

12h 36m1 stop Toronto Pearson Intl

$837Air Canada

Fri, Feb 26 - Sun, Feb 28

9:00 am - 2:35 pmPHL Philadelphia-LHR London Heathrow

24h 35m3 stops Boston Logan Intl Kastrup Copenhagen Oslo Gardermoen

6:40 am - 12:46 amLHR London Heathrow-PHL Philadelphia

23h 06m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson

$844Scandinavian Airlines

Fri, Feb 12 - Sun, Feb 14

7:35 pm - 1:10 pmPHL Philadelphia-LHR London Heathrow

12h 35m1 stop Barcelona-El Prat

1:10 pm - 4:15 pmLHR London Heathrow-PHL Philadelphia

8h 05mnonstop

$877Iberia

Tue, Feb 16 - Thu, Feb 25

7:50 pm - 7:50 amPHL Philadelphia-LHR London Heathrow

7h 00mnonstop

6:15 am - 3:50 pmLHR London Heathrow-PHL Philadelphia

14h 35m1 stop Madrid Barajas

$879Iberia

Wed, Feb 24 - Wed, Mar 3

9:15 pm - 9:40 amPIT Pittsburgh-LHR London Heathrow

7h 25mnonstop

3:55 pm - 7:20 pmLHR London Heathrow-PIT Pittsburgh

8h 25mnonstop

$880British Airways

Wed, Feb 24 - Wed, Mar 3

9:15 pm - 9:40 amPIT Pittsburgh-LHR London Heathrow

7h 25mnonstop

3:55 pm - 7:20 pmLHR London Heathrow-PIT Pittsburgh

8h 25mnonstop

$881British Airways

Recent last minute flight deals from Pennsylvania to London

Mon, Nov 16 - Sun, May 16

10:27 am - 6:55 amPHL Philadelphia-LHR London Heathrow

15h 28m1 stop Boston Logan Intl

8:40 am - 6:52 pmLHR London Heathrow-PHL Philadelphia

15h 12m1 stop Boston Logan Intl

$822JetBlue

Mon, Nov 16 - Wed, May 12

10:27 am - 6:55 amPHL Philadelphia-LHR London Heathrow

15h 28m1 stop Boston Logan Intl

8:40 am - 6:52 pmLHR London Heathrow-PHL Philadelphia

15h 12m1 stop Boston Logan Intl

$822JetBlue

Wed, Nov 18 - Fri, Nov 27

12:09 pm - 7:45 amMDT Harrisburg-LHR London Heathrow

14h 36m1 stop Detroit Metropolitan Wayne County

6:30 am - 4:25 pmLHR London Heathrow-MDT Harrisburg

14h 55m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$876Delta

Wed, Nov 18 - Fri, Nov 27

12:09 pm - 7:20 amMDT Harrisburg-LHR London Heathrow

14h 11m2 stops Detroit Metropolitan Wayne County Washington, D.C. Dulles Intl

6:30 am - 4:25 pmLHR London Heathrow-MDT Harrisburg

14h 55m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$881Delta

Wed, Nov 18 - Wed, Nov 25

12:52 pm - 12:00 pmERI Erie-LHR London Heathrow

18h 08m1 stop Charlotte Douglas

11:45 am - 10:26 pmLHR London Heathrow-ERI Erie

15h 41m1 stop Charlotte Douglas

$905American Airlines

Wed, Nov 18 - Wed, Nov 25

12:52 pm - 12:00 pmERI Erie-LHR London Heathrow

18h 08m1 stop Charlotte Douglas

1:10 pm - 11:56 pmLHR London Heathrow-ERI Erie

15h 46m2 stops Boston Logan Intl Chicago O'Hare Intl

$909American Airlines

Mon, Nov 16 - Wed, Apr 28

5:58 pm - 5:30 pmPHL Philadelphia-LHR London Heathrow

18h 32m2 stops Boston Logan Intl Lisbon Humberto Delgado

6:00 am - 6:52 pmLHR London Heathrow-PHL Philadelphia

17h 52m2 stops Lisbon Humberto Delgado Boston Logan Intl

$953TAP AIR PORTUGAL

Mon, Nov 16 - Sun, May 16

5:58 pm - 10:40 pmPHL Philadelphia-LHR London Heathrow

23h 42m2 stops Boston Logan Intl Lisbon Humberto Delgado

7:50 pm - 6:52 pmLHR London Heathrow-PHL Philadelphia

28h 02m2 stops Lisbon Humberto Delgado Boston Logan Intl

$971TAP AIR PORTUGAL

Tue, Nov 17 - Tue, Nov 24

7:33 pm - 3:50 pmPIT Pittsburgh-LHR London Heathrow

15h 17m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

11:10 am - 11:30 pmLHR London Heathrow-PIT Pittsburgh

17h 20m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

$1,052Lufthansa

Wed, Nov 18 - Tue, Nov 24

8:00 pm - 6:30 pmPIT Pittsburgh-LHR London Heathrow

17h 30m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

11:10 am - 11:30 pmLHR London Heathrow-PIT Pittsburgh

17h 20m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

$1,052Lufthansa

Useful Info

Low season	January
High season	July
Cheapest flight	$280

Best time to beat the crowds with an average 22% drop in price.

Most popular time to fly with an average 19% increase in price.

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 Heathrow Airport?
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 Heathrow Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to London Heathrow Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport 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 Heathrow Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport 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 Heathrow Airport?
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 Heathrow Airport from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Hounslow

Hayes

Slough

Richmond

Wembley

Salisbury

Luton

Ilford

Eastbourne

Northampton

Kingston upon Thames

Guildford

Swindon

Crawley

Bedford

Watford

Harrow

Moreton-in-Marsh

Ipswich

Folkestone

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