Find cheap flights from Pennsylvania to London

Find cheap flights from Pennsylvania to London

Round-trip
Economy
Washington (WAS)
London All airports
Tue 6/2
Tue 6/9
Any month
Compare vs. KAYAK |
Search hundreds of travel sites at once for deals on flights to London

Good to know

Low season

May Best time to beat the crowds with an average 7% drop in price.

High season

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

Average price of a round-trip

$1226 (avg. price over the last 2 weeks)

Good deal for a round-trip

$516 or less

FAQs for booking Pennsylvania to London flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Book cheap flights from Pennsylvania to London (round-trip)

Airports
Origin
Philadelphia
$471
only
$471
Destination
London
$521
only
$521
$530
only
$530
$471
only
$471
Tue, Jun 16
PHL
Philadelphia Airport
LGW
London Gatwick Airport
16h 10m
Tue, Jun 23
LGW
London Gatwick Airport
PHL
Philadelphia Airport
15h 14m
Trip: 8 days
Based on null reviews
Thu, Oct 22
PHL
Philadelphia Airport
LHR
London Heathrow Airport
10h 20m
Sun, Nov 1
LHR
London Heathrow Airport
PHL
Philadelphia Airport
13h 05m
Trip: 11 days
Based on null reviews
Sat, Nov 7
PHL
Philadelphia Airport
LHR
London Heathrow Airport
9h 20m
Sat, Nov 14
LHR
London Heathrow Airport
PHL
Philadelphia Airport
32h 55m
Trip: 8 days
Based on null reviews
Thu, Oct 22
PHL
Philadelphia Airport
LGW
London Gatwick Airport
10h 00m
Sun, Nov 1
LGW
London Gatwick Airport
PHL
Philadelphia Airport
12h 40m
Trip: 11 days
Based on null reviews
Tue, Nov 3
PHL
Philadelphia Airport
LHR
London Heathrow Airport
14h 45m
Tue, Nov 10
LHR
London Heathrow Airport
PHL
Philadelphia Airport
11h 25m
Trip: 8 days
Based on null reviews
Tue, Sep 8
PHL
Philadelphia Airport
LCY
London City
11h 30m
Mon, Sep 21
LCY
London City
PHL
Philadelphia Airport
14h 30m
Trip: 14 days
Based on null reviews
Fri, Jun 12
PHL
Philadelphia Airport
LCY
London City
13h 25m
Mon, Jun 15
LCY
London City
PHL
Philadelphia Airport
14h 30m
Trip: 4 days
Based on null reviews
Sat, Nov 7
PHL
Philadelphia Airport
LGW
London Gatwick Airport
11h 40m
Sat, Nov 14
LGW
London Gatwick Airport
PHL
Philadelphia Airport
28h 00m
Trip: 8 days
Based on null reviews
Tue, Sep 15
PHL
Philadelphia Airport
LGW
London Gatwick Airport
15h 10m
Thu, Sep 24
LGW
London Gatwick Airport
PHL
Philadelphia Airport
16h 55m
Trip: 10 days
Based on null reviews
Tue, Nov 3
PHL
Philadelphia Airport
LHR
London Heathrow Airport
18h 05m
Tue, Nov 10
LHR
London Heathrow Airport
PHL
Philadelphia Airport
14h 25m
Trip: 8 days
Based on null reviews
Tue, Sep 8
PHL
Philadelphia Airport
LGW
London Gatwick Airport
9h 55m
Mon, Sep 21
LGW
London Gatwick Airport
PHL
Philadelphia Airport
12h 35m
Trip: 14 days
Based on null reviews
Sun, Jun 7
PHL
Philadelphia Airport
LCY
London City
11h 30m
Sun, Jun 14
LCY
London City
PHL
Philadelphia Airport
27h 30m
Trip: 8 days
Based on null reviews
Fri, Jun 12
PHL
Philadelphia Airport
LGW
London Gatwick Airport
9h 55m
Mon, Jun 15
LGW
London Gatwick Airport
PHL
Philadelphia Airport
12h 35m
Trip: 4 days
Based on null reviews
Tue, Sep 8
PHL
Philadelphia Airport
LCY
London City
11h 30m
Tue, Sep 22
LCY
London City
PHL
Philadelphia Airport
24h 45m
Trip: 15 days
Based on null reviews
Fri, Jun 12
PHL
Philadelphia Airport
LHR
London Heathrow Airport
11h 15m
Mon, Jun 15
LHR
London Heathrow Airport
PHL
Philadelphia Airport
12h 25m
Trip: 4 days
Based on null reviews
Thu, Sep 10
PHL
Philadelphia Airport
LCY
London City
11h 30m
Tue, Sep 22
LCY
London City
PHL
Philadelphia Airport
24h 45m
Trip: 13 days
Based on null reviews
Fri, Jul 3
PHL
Philadelphia Airport
LGW
London Gatwick Airport
15h 59m
Tue, Jul 7
LGW
London Gatwick Airport
PHL
Philadelphia Airport
15h 37m
Trip: 5 days
Based on null reviews
Wed, Sep 23
PHL
Philadelphia Airport
LCY
London City
11h 30m
Sun, Oct 4
LCY
London City
PHL
Philadelphia Airport
25h 55m
Trip: 12 days
Based on null reviews
Sun, Sep 13
PHL
Philadelphia Airport
LHR
London Heathrow Airport
10h 20m
Sun, Sep 20
LHR
London Heathrow Airport
PHL
Philadelphia Airport
23h 15m
Trip: 8 days
Based on null reviews
Sun, Sep 13
PHL
Philadelphia Airport
LHR
London Heathrow Airport
10h 20m
Sun, Sep 20
LHR
London Heathrow Airport
PHL
Philadelphia Airport
23h 15m
Trip: 8 days
Based on null reviews

Book cheap flights from Pennsylvania to London (one-way)

Airports
Origin
Philadelphia
$205
only
$205
Pittsburgh
$278
only
$278
Destination
London
$205
only
$205
$337
only
$337
$221
only
$221
$294
only
$294
Wed, Jun 3
PHL
Philadelphia Airport
LHR
London Heathrow Airport
9h 20m
Based on null reviews
Wed, Jun 3
PHL
Philadelphia Airport
LGW
London Gatwick Airport
10h 00m
Based on null reviews
Thu, Jun 18
PHL
Philadelphia Airport
LGW
London Gatwick Airport
15h 25m
Based on null reviews
Thu, Jul 2
PHL
Philadelphia Airport
LGW
London Gatwick Airport
13h 45m
Based on null reviews
Fri, Jun 19
PHL
Philadelphia Airport
LHR
London Heathrow Airport
11h 15m
Based on null reviews
Thu, Jul 2
PHL
Philadelphia Airport
LHR
London Heathrow Airport
31h 10m
Based on null reviews
Tue, Jul 7
PIT
Pittsburgh Airport
LGW
London Gatwick Airport
18h 40m
Based on null reviews
Sat, Jul 18
PHL
Philadelphia Airport
LHR
London Heathrow Airport
22h 40m
Based on null reviews
Fri, Jun 19
PHL
Philadelphia Airport
LGW
London Gatwick Airport
9h 55m
Based on null reviews
Tue, Jul 7
PIT
Pittsburgh Airport
STN
London Stansted Airport
31h 55m
Based on null reviews
Wed, Jul 15
PIT
Pittsburgh Airport
LGW
London Gatwick Airport
41h 10m
Based on null reviews
Wed, Aug 5
PHL
Philadelphia Airport
LHR
London Heathrow Airport
30h 45m
Based on null reviews
Sun, Aug 2
PIT
Pittsburgh Airport
LHR
London Heathrow Airport
42h 51m
Based on null reviews
Wed, Jul 15
PHL
Philadelphia Airport
LHR
London Heathrow Airport
54h 45m
Based on null reviews
Thu, Jul 16
PHL
Philadelphia Airport
LHR
London Heathrow Airport
30h 05m
Based on null reviews
Wed, Jul 15
PIT
Pittsburgh Airport
STN
London Stansted Airport
44h 30m
Based on null reviews
Mon, Jun 15
PHL
Philadelphia Airport
LCY
London City
11h 30m
Based on null reviews
Mon, Jun 1
PHL
Philadelphia Airport
LHR
London Heathrow Airport
11h 15m
Based on null reviews
Wed, Jul 29
PIT
Pittsburgh Airport
LGW
London Gatwick Airport
58h 10m
Based on null reviews
Wed, Jul 15
PIT
Pittsburgh Airport
LHR
London Heathrow Airport
26h 35m
Based on null reviews

Top airlines flying from Pennsylvania to London

Scores according to KAYAK customer reviews

8.1
SWISS
Overall score based on 8,958 reviews
8.3
Boarding
7.9
Comfort
8.7
Crew
7.8
Entertainment
8.0
Food
Airline reviews
Read more about SWISS
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

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