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Cheap flights from Seattle to London from $342

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 12/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
7:00 am - 12:35 pmSEA  Seattle/Tacoma Intl-LCY London City
21h 35m2 stops Chicago O'Hare Intl Zurich
SWISS Logo
9:15 am - 6:32 pmLCY  London City-SEA Seattle/Tacoma Intl
17h 17m2 stops Zurich Vancouver Intl
$826SWISS
Mon, Oct 5 - Wed, Oct 7
SWISS Logo
7:00 am - 12:35 pmSEA  Seattle/Tacoma Intl-LCY London City
21h 35m2 stops Chicago O'Hare Intl Zurich
SWISS Logo
9:15 am - 6:32 pmLCY  London City-SEA Seattle/Tacoma Intl
17h 17m2 stops Zurich Vancouver Intl
$826SWISS
Tue, Oct 6 - Thu, Oct 8
Lufthansa Logo
2:10 pm - 5:55 pmSEA  Seattle/Tacoma Intl-LCY London City
19h 45m1 stop Frankfurt am Main
Lufthansa Logo
9:15 am - 4:59 pmLCY  London City-SEA Seattle/Tacoma Intl
15h 44m2 stops Frankfurt am Main Munich Franz Josef Strauss
$875Lufthansa
Tue, Oct 6 - Thu, Oct 8
Lufthansa Logo
2:10 pm - 5:55 pmSEA  Seattle/Tacoma Intl-LCY London City
19h 45m1 stop Frankfurt am Main
Lufthansa Logo
9:15 am - 4:59 pmLCY  London City-SEA Seattle/Tacoma Intl
15h 44m2 stops Frankfurt am Main Munich Franz Josef Strauss
$875Lufthansa
Mon, Oct 5 - Wed, Oct 7
Virgin Atlantic Logo
2:35 pm - 7:35 pmSEA  Seattle/Tacoma Intl-LCY London City
21h 00m1 stop Amsterdam Schiphol
Virgin Atlantic Logo
5:50 pm - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
26h 00m1 stop Amsterdam Schiphol
$881Virgin Atlantic
Mon, Nov 30 - Mon, Dec 7
Delta Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
Delta Logo
9:20 am - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
34h 30m1 stop Amsterdam Schiphol
$881Delta
Tue, Nov 17 - Thu, Jan 14
Delta Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
Delta Logo
10:00 am - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
33h 50m1 stop Amsterdam Schiphol
$881Delta
Tue, Nov 17 - Mon, Jan 11
Delta Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
Delta Logo
10:00 am - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
33h 50m1 stop Amsterdam Schiphol
$881Delta
Sun, Nov 15 - Thu, Jan 14
Delta Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
Delta Logo
9:20 am - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
34h 30m1 stop Amsterdam Schiphol
$881Delta
Mon, Nov 16 - Wed, Jan 13
Delta Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
Delta Logo
10:00 am - 11:50 amLCY  London City-SEA Seattle/Tacoma Intl
33h 50m1 stop Amsterdam Schiphol
$881Delta
Mon, Nov 16 - Mon, Jan 11

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KLM flights from Seattle to London City Airport

Our best KLM deals on Seattle to London City Airport flight tickets
KLM
Sep 22
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Oct 13
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$931
KLM
Sep 23
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Oct 15
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$980
KLM
Aug 24
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 28
LCY9:20 amLondon City
15h 07m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$1,030

SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Oct 5
SEA7:00 amSeattle/Tacoma Intl
21h 35m
2 stops
LCY12:35 pmLondon City
Oct 7
LCY9:15 amLondon City
17h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$826
SWISS
Nov 10
SEA10:50 amSeattle/Tacoma Intl
18h 00m
2 stops
LCY12:50 pmLondon City
Nov 18
LCY9:15 amLondon City
21h 52m
2 stops
SEA11:07 pmSeattle/Tacoma Intl
$897
SWISS
Jan 12
SEA3:30 pmSeattle/Tacoma Intl
17h 35m
2 stops
LCY5:05 pmLondon City
Jan 21
LCY9:15 amLondon City
22h 06m
2 stops
SEA11:21 pmSeattle/Tacoma Intl
$906

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to London City Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 18, 2026.
Use the filters below to find and compare flights from Seattle to London City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Mon 10/5

7:00 am-12:35 pm

2 stops21h 35m

London City

Wed 10/7

9:15 am-6:32 pm

2 stops17h 17m

$826

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Tue 10/6

7:00 am-12:35 pm

2 stops21h 35m

London City

Thu 10/8

9:15 am-6:32 pm

2 stops17h 17m

$826
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Tue 10/6

2:10 pm-5:55 pm

1 stop19h 45m

London City

Thu 10/8

9:15 am-4:59 pm

2 stops15h 44m

$875

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Mon 10/5

2:10 pm-5:55 pm

1 stop19h 45m

London City

Wed 10/7

9:15 am-4:59 pm

2 stops15h 44m

$875

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Mon 11/30

2:35 pm-7:35 pm

1 stop21h 00m

London City

Mon 12/7

5:50 pm-11:50 am

1 stop26h 00m

$881

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Tue 11/17

2:35 pm-4:35 pm

1 stop18h 00m

London City

Thu 1/14

9:20 am-11:50 am

1 stop34h 30m

$881

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Tue 11/17

2:35 pm-4:35 pm

1 stop18h 00m

London City

Mon 1/11

10:00 am-11:50 am

1 stop33h 50m

$881

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Sun 11/15

2:35 pm-4:35 pm

1 stop18h 00m

London City

Thu 1/14

10:00 am-11:50 am

1 stop33h 50m

$881

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Mon 11/16

2:35 pm-4:35 pm

1 stop18h 00m

London City

Wed 1/13

9:20 am-11:50 am

1 stop34h 30m

$881

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Mon 11/16

2:35 pm-4:35 pm

1 stop18h 00m

London City

Mon 1/11

10:00 am-11:50 am

1 stop33h 50m

$881

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Seattle to London City Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to London City?

Delta, Virgin Atlantic, and SWISS are the most popular carriers operating from Seattle/Tacoma Intl to London City

When to book flights from Seattle to London City Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to London City Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to London City Airport (SEA to LCY) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to London City Airport

Best Price Found

$342

Fastest flight time

11h 40m

Direct flights

None
The best one-way flight to London City Airport from Seattle in the past 72 hours is $342. The best round-trip flight deal from Seattle to London City Airport found on momondo in the last 72 hours is $826.
The fastest flight from Seattle to London City Airport takes 11h 40m
There are no direct flights from Seattle to London City Airport. There are no popular flight routes from Seattle to London City Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London City Airport

  • How far is Seattle/Tacoma Intl to London City by plane?

    The distance between Seattle/Tacoma Intl and London City is about 4785.6 mi. In terms of flight time, this usually takes a little over 11h 40m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London City Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to London City Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to London City Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to London City Airport.

  • What documentation or ID do you need to fly to London City Airport?

    The travel and health documents you'll need for your trip to London City Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London City Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Hayes
Wembley
Croydon
Dover
Stansted
Richmond
Kingston upon Thames
Harrow
Watford
Cobham
Slough
Uxbridge
Worthing
Romford
Ilford
Bedford

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to London. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to London with flexible booking policies on momondo?

Yes. All flights to London from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to London?

Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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