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 round-trip 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.

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.

Round-trip

One-way

Recent round-trip flight deals from Pennsylvania to London

Fri, Dec 4 - Fri, Dec 11

7:00 am - 5:00 pmPHL Philadelphia-YXU London

10h 00m1 stop Fort Lauderdale

9:30 am - 11:26 pmYXU London-PHL Philadelphia

37h 56m2 stops Fort Lauderdale Raleigh-Durham

$396Multiple Airlines

Fri, Dec 4 - Fri, Dec 11

7:00 am - 5:00 pmPHL Philadelphia-YXU London

10h 00m1 stop Fort Lauderdale

9:30 am - 12:43 amYXU London-PHL Philadelphia

15h 13m1 stop Fort Lauderdale

$398Multiple Airlines

Sun, Dec 6 - Sun, Dec 13

6:31 pm - 5:45 pmPHL Philadelphia-YXU London

23h 14m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale

10:15 am - 11:40 pmYXU London-PHL Philadelphia

13h 25m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson

$401Multiple Airlines

Sun, Dec 6 - Sun, Dec 13

6:31 pm - 5:45 pmPHL Philadelphia-YXU London

23h 14m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale

10:15 am - 12:43 amYXU London-PHL Philadelphia

14h 28m1 stop Fort Lauderdale

$412Multiple Airlines

Fri, Dec 4 - Fri, Dec 11

7:00 am - 5:00 pmPHL Philadelphia-YXU London

10h 00m1 stop Fort Lauderdale

9:30 am - 9:07 pmYXU London-PHL Philadelphia

35h 37m3 stops Fort Lauderdale Raleigh-Durham Atlanta Hartsfield-Jackson

$432Multiple Airlines

Sun, Dec 6 - Sun, Dec 13

6:31 pm - 5:45 pmPHL Philadelphia-YXU London

23h 14m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale

10:15 am - 3:26 pmYXU London-PHL Philadelphia

29h 11m3 stops Fort Lauderdale Atlanta Hartsfield-Jackson Raleigh-Durham

$435Multiple Airlines

Sun, Dec 6 - Sun, Dec 13

8:40 am - 5:45 pmPHL Philadelphia-YXU London

33h 05m3 stops Atlanta Hartsfield-Jackson Cleveland Hopkins Intl Fort Lauderdale

10:15 am - 11:26 pmYXU London-PHL Philadelphia

37h 11m3 stops Fort Lauderdale Atlanta Hartsfield-Jackson Raleigh-Durham

$453Multiple Airlines

Sun, Dec 6 - Sun, Dec 13

2:51 pm - 5:45 pmPHL Philadelphia-YXU London

26h 54m1 stop Fort Lauderdale

10:15 am - 12:43 amYXU London-PHL Philadelphia

14h 28m1 stop Fort Lauderdale

$484Multiple Airlines

Fri, Dec 4 - Fri, Dec 11

6:00 am - 5:00 pmPHL Philadelphia-YXU London

11h 00m2 stops Charlotte Douglas Fort Lauderdale

9:30 am - 9:07 pmYXU London-PHL Philadelphia

35h 37m3 stops Fort Lauderdale Raleigh-Durham Atlanta Hartsfield-Jackson

$523Multiple Airlines

Fri, Dec 4 - Fri, Dec 11

7:34 am - 5:00 pmPHL Philadelphia-YXU London

33h 26m3 stops Atlanta Hartsfield-Jackson San Juan Luis Munoz Marin Intl Orlando

9:30 am - 9:07 pmYXU London-PHL Philadelphia

35h 37m3 stops Fort Lauderdale Raleigh-Durham Atlanta Hartsfield-Jackson

$646Multiple Airlines

Useful Info

Cheapest flight	$165

Flight from Philadelphia 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 round-trip 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.