Find cheap flights from Washington to London

Find cheap flights from Washington to London

Round-trip
Economy
Boston (BOS)
London All airports
Thu 5/28
Thu 6/4
Any month
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Good to know

Low season

October Best time to beat the crowds with an average 6% drop in price.

High season

May Most popular time to fly with an average 14% increase in price.

Average price of a round-trip

$989 (avg. price over the last 2 weeks)

Good deal for a round-trip

$498 or less

FAQs for booking Washington to London flights

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

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

Airports
Origin
Seattle
$423
only
$423
Destination
London
$423
only
$423
$447
only
$447
Tue, Nov 3
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
12h 20m
Tue, Nov 10
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 45m
Trip: 8 days
Based on null reviews
Tue, Sep 22
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Sep 29
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Mon, Sep 14
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Sep 29
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 16 days
Based on null reviews
Tue, Nov 3
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
12h 20m
Tue, Nov 10
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 45m
Trip: 8 days
Based on null reviews
Mon, Sep 14
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Thu, Sep 24
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 11 days
Based on null reviews
Wed, Sep 16
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
20h 30m
Wed, Sep 23
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Wed, Sep 23
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
20h 30m
Wed, Sep 30
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 8 days
Based on null reviews
Mon, Sep 21
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
21h 15m
Fri, Oct 9
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 19 days
Based on null reviews
Sun, Sep 20
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Fri, Sep 25
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 6 days
Based on null reviews
Mon, Sep 14
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Sep 29
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 16 days
Based on null reviews
Wed, Sep 16
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Sep 30
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 15 days
Based on null reviews
Sun, Sep 13
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Sep 30
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 18 days
Based on null reviews
Tue, Oct 13
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
12h 00m
Tue, Oct 20
LGW
London Gatwick Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Tue, Oct 6
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Oct 14
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 9 days
Based on null reviews
Tue, Oct 13
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
12h 00m
Tue, Oct 20
LGW
London Gatwick Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Tue, Oct 6
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Oct 14
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 9 days
Based on null reviews
Tue, Oct 6
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Oct 14
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 9 days
Based on null reviews
Tue, Oct 6
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Wed, Oct 14
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
28h 30m
Trip: 9 days
Based on null reviews
Tue, Sep 29
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
20h 30m
Tue, Oct 6
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Tue, Sep 29
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Oct 13
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 15 days
Based on null reviews

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

Airports
Origin
Seattle
$229
only
$229
Destination
London
$282
only
$282
$341
only
$341
$229
only
$229
$340
only
$340
Sun, Jun 21
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
31h 16m
Based on null reviews
Tue, Jul 7
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
30h 00m
Based on null reviews
Sun, Jun 21
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
31h 16m
Based on null reviews
Sun, Jun 14
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
9h 15m
Based on null reviews
Mon, Jul 6
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 32m
Based on null reviews
Wed, Jul 8
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 22m
Based on null reviews
Fri, Jul 10
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 22m
Based on null reviews
Mon, Jul 6
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 32m
Based on null reviews
Fri, Jul 10
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Based on null reviews
Sat, Aug 1
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
34h 45m
Based on null reviews
Thu, Jul 9
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 22m
Based on null reviews
Mon, Jul 13
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
40h 20m
Based on null reviews
Mon, Jul 27
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
17h 32m
Based on null reviews
Tue, Jun 16
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
34h 22m
Based on null reviews
Sun, Aug 9
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
49h 00m
Based on null reviews
Sun, Jun 14
SEA
Seattle/Tacoma Airport
LGW
London Gatwick Airport
31h 07m
Based on null reviews
Thu, Jul 2
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
52h 55m
Based on null reviews
Fri, Jul 10
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
43h 50m
Based on null reviews
Mon, Jul 6
SEA
Seattle/Tacoma Airport
STN
London Stansted Airport
38h 55m
Based on null reviews
Sun, Jul 12
SEA
Seattle/Tacoma Airport
LTN
London Luton Airport
49h 55m
Based on null reviews

Top airlines flying from Washington to London

Scores according to KAYAK customer reviews

7.4
Aer Lingus
Overall score based on 6,060 reviews
7.6
Boarding
7.3
Comfort
8.0
Crew
7.1
Entertainment
6.9
Food
Airline reviews
Read more about Aer Lingus
*
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:

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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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Why aren’t prices accurate 100% of the time?
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