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Cheap flights from Seattle to London from $378

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 10/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
9:15 am - 6:32 pm
LCY
-
SEA
41h 17m
2 stops
$907Lufthansa
Sun, Sep 6 - Tue, Sep 8
SWISS Logo
3:33 pm - 5:30 pm
SEA
-
LCY
17h 57m
2 stops
SWISS Logo
9:15 am - 8:43 pm
LCY
-
SEA
19h 28m
2 stops
$908SWISS
Thu, Aug 6 - Tue, Aug 18
SWISS Logo
3:30 pm - 5:25 pm
SEA
-
LCY
17h 55m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$912SWISS
Sat, Aug 29 - Thu, Sep 17
SWISS Logo
1:16 pm - 6:40 pm
SEA
-
LCY
45h 24m
2 stops
SWISS Logo
6:00 pm - 7:07 pm
LCY
-
SEA
33h 07m
2 stops
$926SWISS
Sun, Aug 16 - Wed, Aug 19
KLM Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
KLM Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$927KLM
Wed, Aug 19 - Wed, Sep 2
KLM Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
KLM Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$928KLM
Wed, Sep 9 - Fri, Sep 25
KLM Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
KLM Logo
10:00 am - 4:27 pm
LCY
-
SEA
14h 27m
1 stop
$930KLM
Tue, Aug 18 - Thu, Aug 27
Delta Logo
1:50 pm - 7:15 am
SEA
-
LCY
33h 25m
1 stop
Delta Logo
9:20 am - 4:35 pm
LCY
-
SEA
15h 15m
1 stop
$931Delta
Thu, Aug 27 - Tue, Sep 15
Virgin Atlantic Logo
5:10 am - 7:15 am
SEA
-
LCY
18h 05m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:37 am
LCY
-
SEA
25h 47m
1 stop
$934Virgin Atlantic
Wed, Aug 12 - Tue, Aug 25
Virgin Atlantic Logo
5:10 am - 7:15 am
SEA
-
LCY
18h 05m
2 stops
Virgin Atlantic Logo
9:20 am - 4:27 pm
LCY
-
SEA
15h 07m
1 stop
$935Virgin Atlantic
Wed, Aug 12 - Wed, Aug 26

KLM flights from Seattle to London City Airport

Our best KLM deals on Seattle to London City Airport flight tickets
KLM
Aug 19
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Sep 2
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$927
KLM
Sep 9
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Sep 25
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$928
KLM
Aug 18
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 27
LCY10:00 amLondon City
14h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$930

Virgin Atlantic flights from Seattle to London City Airport

Our best Virgin Atlantic deals on Seattle to London City Airport flight tickets
Virgin Atlantic
Aug 12
SEA2:30 pmSeattle/Tacoma Intl
20h 00m
2 stops
LCY6:30 pmLondon City
Aug 19
LCY7:45 amLondon City
16h 42m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$934
Virgin Atlantic
Aug 16
SEA5:45 pmSeattle/Tacoma Intl
16h 45m
1 stop
LCY6:30 pmLondon City
Sep 1
LCY9:20 amLondon City
20h 25m
2 stops
SEA9:45 pmSeattle/Tacoma Intl
$940
Virgin Atlantic
Aug 17
SEA5:10 amSeattle/Tacoma Intl
19h 40m
2 stops
LCY8:50 amLondon City
Aug 27
LCY7:45 amLondon City
17h 14m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$944

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 May 26, 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 - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/6

2:10 pm-5:55 pm

1 stop19h 45m

London City

Tue 9/8

9:15 am-6:32 pm

2 stops41h 17m

$907

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Thu 8/6

3:33 pm-5:30 pm

2 stops17h 57m

London City

Tue 8/18

9:15 am-8:43 pm

2 stops19h 28m

$908

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 8/29

3:30 pm-5:25 pm

2 stops17h 55m

London City

Thu 9/17

9:15 am-6:32 pm

2 stops17h 17m

$912

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 8/16

1:16 pm-6:40 pm

2 stops45h 24m

London City

Wed 8/19

6:00 pm-7:07 pm

2 stops33h 07m

$926

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/19

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 9/2

10:00 am-4:35 pm

1 stop14h 35m

$927

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 9/9

1:50 pm-9:30 am

1 stop11h 40m

London City

Fri 9/25

10:00 am-4:35 pm

1 stop14h 35m

$928
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Thu 8/27

10:00 am-4:27 pm

1 stop14h 27m

$930

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Thu 8/27

1:50 pm-7:15 am

1 stop33h 25m

London City

Tue 9/15

9:20 am-4:35 pm

1 stop15h 15m

$931

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/12

5:10 am-7:15 am

2 stops18h 05m

London City

Tue 8/25

5:50 pm-11:37 am

1 stop25h 47m

$934

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/12

5:10 am-7:15 am

2 stops18h 05m

London City

Wed 8/26

9:20 am-4:27 pm

1 stop15h 07m

$935

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?

Virgin Atlantic, Delta, and Lufthansa 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

Fastest flight time

11h 35m

Direct flights

None
The fastest flight from Seattle to London City Airport takes 11h 35m
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 35m.

  • 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
Dover
Hayes
Crawley
Croydon
Wembley
Slough
Stansted
Harrow
Dartford
Brentwood
Watford
Ilford
Cobham
Folkestone
Uxbridge
Guildford

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.

An easier way to manage your London City Airport trip

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