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Cheap flights from Seattle to London from $334

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 10/4. 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.
Multiple Airlines Logo
2:00 pm - 5:40 pm
SEA
-
LCY
19h 40m
1 stop
Multiple Airlines Logo
9:15 am - 8:49 pm
LCY
-
SEA
19h 34m
2 stops
$780Multiple Airlines
Mon, Nov 2 - Wed, Nov 4
SWISS Logo
1:16 pm - 5:05 pm
SEA
-
LCY
19h 49m
2 stops
SWISS Logo
9:15 am - 10:53 pm
LCY
-
SEA
21h 38m
2 stops
$781SWISS
Mon, Nov 23 - Wed, Nov 25
SWISS Logo
3:27 pm - 6:30 pm
SEA
-
LCY
19h 03m
2 stops
SWISS Logo
1:30 pm - 10:53 pm
LCY
-
SEA
41h 23m
2 stops
$786SWISS
Mon, Nov 2 - Wed, Nov 4
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
9:15 am - 6:52 pm
LCY
-
SEA
41h 37m
2 stops
$800Lufthansa
Tue, Sep 29 - Thu, Oct 1
Lufthansa Logo
1:56 pm - 5:55 pm
SEA
-
LCY
43h 59m
2 stops
Lufthansa Logo
9:15 am - 4:59 pm
LCY
-
SEA
15h 44m
2 stops
$839Lufthansa
Tue, Sep 29 - Fri, Oct 2
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
$854Lufthansa
Sun, Sep 27 - Tue, Sep 29
Lufthansa Logo
7:00 am - 5:55 pm
SEA
-
LCY
26h 55m
2 stops
Lufthansa Logo
9:15 am - 2:22 pm
LCY
-
SEA
37h 07m
2 stops
$858Lufthansa
Sun, Sep 27 - Tue, Sep 29
Lufthansa Logo
1:56 pm - 5:55 pm
SEA
-
LCY
43h 59m
2 stops
Lufthansa Logo
9:15 am - 12:20 pm
LCY
-
SEA
35h 05m
1 stop
$870Lufthansa
Mon, Sep 28 - Thu, Oct 1
Lufthansa Logo
2:00 pm - 5:40 pm
SEA
-
LCY
19h 40m
1 stop
Lufthansa Logo
9:50 am - 6:59 pm
LCY
-
SEA
41h 09m
2 stops
$872Lufthansa
Wed, Dec 2 - Fri, Dec 4
KLM Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
KLM Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$875KLM
Sun, Oct 11 - Thu, Oct 15

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Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Sep 20
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Sep 24
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$924
Delta
Aug 3
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 19
LCY7:45 amLondon City
16h 42m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$925
Delta
Nov 28
SEA2:35 pmSeattle/Tacoma Intl
14h 40m
1 stop
LCY1:15 pmLondon City
Dec 8
LCY8:40 amLondon City
35h 10m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$927

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Sep 29
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 1
LCY9:15 amLondon City
41h 37m
2 stops
SEA6:52 pmSeattle/Tacoma Intl
$800
Lufthansa
Sep 29
SEA1:56 pmSeattle/Tacoma Intl
43h 59m
2 stops
LCY5:55 pmLondon City
Oct 2
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$839
Lufthansa
Sep 27
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Sep 29
LCY9:15 amLondon City
37h 07m
2 stops
SEA2:22 pmSeattle/Tacoma Intl
$854

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 July 3, 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

Mon 11/2

2:00 pm-5:40 pm

1 stop19h 40m

London City

Wed 11/4

9:15 am-8:49 pm

2 stops19h 34m

$780

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/23

1:16 pm-5:05 pm

2 stops19h 49m

London City

Wed 11/25

9:15 am-10:53 pm

2 stops21h 38m

$781

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/2

3:27 pm-6:30 pm

2 stops19h 03m

London City

Wed 11/4

1:30 pm-10:53 pm

2 stops41h 23m

$786

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

2:10 pm-5:55 pm

1 stop19h 45m

London City

Thu 10/1

9:15 am-6:52 pm

2 stops41h 37m

$800

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

1:56 pm-5:55 pm

2 stops43h 59m

London City

Fri 10/2

9:15 am-4:59 pm

2 stops15h 44m

$839

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/27

2:10 pm-5:55 pm

1 stop19h 45m

London City

Tue 9/29

9:15 am-2:22 pm

2 stops37h 07m

$854

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/27

7:00 am-5:55 pm

2 stops26h 55m

London City

Tue 9/29

9:15 am-2:22 pm

2 stops37h 07m

$858

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/28

1:56 pm-5:55 pm

2 stops43h 59m

London City

Thu 10/1

9:15 am-12:20 pm

1 stop35h 05m

$870

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 12/2

2:00 pm-5:40 pm

1 stop19h 40m

London City

Fri 12/4

9:50 am-6:59 pm

2 stops41h 09m

$872
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/11

1:45 pm-9:30 am

1 stop11h 45m

London City

Thu 10/15

10:00 am-4:35 pm

1 stop14h 35m

$875

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 KLM 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 40m

Direct flights

None
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
Dover
Crawley
Croydon
Wembley
Stansted
Harrow
Slough
Watford
Ilford
Cobham
Brentwood
Folkestone
Guildford
Romford
Uxbridge

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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