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Cheap flights from Seattle to London from $376

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 8/25. 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 - 2:22 pm
LCY
-
SEA
37h 07m
2 stops
$925Lufthansa
Tue, Aug 11 - Thu, Aug 13
Delta Logo
1:45 pm - 4:40 pm
SEA
-
LCY
18h 55m
1 stop
Delta Logo
9:20 am - 11:52 am
LCY
-
SEA
34h 32m
1 stop
$929Delta
Tue, Oct 6 - Mon, Oct 19
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
Sun, Aug 2 - Wed, Aug 19
Delta Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Delta Logo
9:20 am - 4:27 pm
LCY
-
SEA
15h 07m
1 stop
$931Delta
Tue, Aug 18 - Tue, Aug 25
Virgin Atlantic Logo
9:53 am - 9:30 am
SEA
-
LCY
15h 37m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:37 am
LCY
-
SEA
25h 47m
1 stop
$933Virgin Atlantic
Tue, Aug 11 - Tue, Aug 25
Delta Logo
9:55 pm - 8:50 am
SEA
-
LCY
26h 55m
2 stops
Delta Logo
9:20 am - 4:39 pm
LCY
-
SEA
15h 19m
1 stop
$934Delta
Tue, Oct 6 - Wed, Oct 21
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$935SWISS
Tue, Oct 6 - Tue, Oct 13
Virgin Atlantic Logo
7:20 am - 9:30 am
SEA
-
LCY
18h 10m
2 stops
Virgin Atlantic Logo
8:25 am - 8:47 pm
LCY
-
SEA
20h 22m
2 stops
$936Virgin Atlantic
Tue, Sep 29 - Fri, Oct 9
SWISS Logo
3:30 pm - 5:25 pm
SEA
-
LCY
17h 55m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$937SWISS
Tue, Sep 29 - Tue, Oct 13
Virgin Atlantic Logo
7:20 am - 9:30 am
SEA
-
LCY
18h 10m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:33 am
LCY
-
SEA
25h 43m
1 stop
$938Virgin Atlantic
Wed, Nov 11 - Wed, Apr 14

Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Oct 6
SEA5:40 pmSeattle/Tacoma Intl
15h 00m
1 stop
LCY4:40 pmLondon City
Oct 22
LCY10:00 amLondon City
14h 39m
1 stop
SEA4:39 pmSeattle/Tacoma Intl
$929
Delta
Aug 18
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 25
LCY9:20 amLondon City
15h 07m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$931
Delta
Oct 6
SEA9:55 pmSeattle/Tacoma Intl
26h 55m
2 stops
LCY8:50 amLondon City
Oct 21
LCY9:20 amLondon City
15h 19m
1 stop
SEA4:39 pmSeattle/Tacoma Intl
$934

KLM flights from Seattle to London City Airport

Our best KLM deals on Seattle to London City Airport flight tickets
KLM
Aug 2
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 19
LCY10:00 amLondon City
14h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$930
KLM
Aug 4
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 26
LCY10:00 amLondon City
14h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$956
KLM
Aug 11
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 25
LCY10:00 amLondon City
14h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$978

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 21, 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

Tue 8/11

2:10 pm-5:55 pm

1 stop19h 45m

London City

Thu 8/13

9:15 am-2:22 pm

2 stops37h 07m

$925

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

1:45 pm-4:40 pm

1 stop18h 55m

London City

Mon 10/19

9:20 am-11:52 am

1 stop34h 32m

$929
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 8/2

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 8/19

10:00 am-4:27 pm

1 stop14h 27m

$930

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Tue 8/25

9:20 am-4:27 pm

1 stop15h 07m

$931

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/11

9:53 am-9:30 am

2 stops15h 37m

London City

Tue 8/25

5:50 pm-11:37 am

1 stop25h 47m

$933

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

9:55 pm-8:50 am

2 stops26h 55m

London City

Wed 10/21

9:20 am-4:39 pm

1 stop15h 19m

$934

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

7:00 am-8:40 am

2 stops17h 40m

London City

Tue 10/13

7:15 pm-6:32 pm

2 stops31h 17m

$935

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

7:20 am-9:30 am

2 stops18h 10m

London City

Fri 10/9

8:25 am-8:47 pm

2 stops20h 22m

$936

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

3:30 pm-5:25 pm

2 stops17h 55m

London City

Tue 10/13

7:15 pm-6:32 pm

2 stops31h 17m

$937

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 11/11

7:20 am-9:30 am

2 stops18h 10m

London City

Wed 4/14

5:50 pm-11:33 am

1 stop25h 43m

$938

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, KLM, 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

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
Dover
Luton
Hayes
Crawley
Wembley
Slough
Croydon
Stansted
Watford
Harrow
Brentwood
Dartford
Ilford
Cobham
Folkestone
Uxbridge
Romford

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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