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Cheap flights from Seattle to London from $421

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 5/26. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
3:30 pm - 5:30 pm
SEA
-
LCY
18h 00m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$824SWISS
Mon, Oct 5 - Wed, Oct 7
Virgin Atlantic Logo
7:20 am - 9:30 am
SEA
-
LCY
18h 10m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:52 am
LCY
-
SEA
26h 02m
1 stop
$864Virgin Atlantic
Tue, Sep 29 - Wed, Sep 30
Virgin Atlantic Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Virgin Atlantic Logo
8:05 pm - 11:47 am
LCY
-
SEA
23h 42m
1 stop
$922Virgin Atlantic
Sun, Sep 6 - Wed, Nov 18
Delta Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Delta Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$931Delta
Tue, Aug 18 - Wed, Sep 30
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
$932KLM
Tue, Aug 18 - Thu, Aug 27
SWISS Logo
10:30 am - 12:35 pm
SEA
-
LCY
18h 05m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$933SWISS
Mon, Oct 5 - Tue, Oct 13
Virgin Atlantic Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Virgin Atlantic Logo
8:15 pm - 11:47 am
LCY
-
SEA
23h 32m
1 stop
$934Virgin Atlantic
Mon, Aug 24 - Mon, Aug 31
Virgin Atlantic Logo
5:20 am - 9:30 am
SEA
-
LCY
20h 10m
2 stops
Virgin Atlantic Logo
9:20 am - 4:27 pm
LCY
-
SEA
15h 07m
1 stop
$936Virgin Atlantic
Wed, Aug 5 - Wed, Aug 19
SWISS Logo
3:33 pm - 5:25 pm
SEA
-
LCY
17h 52m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$937SWISS
Tue, Sep 8 - Tue, Sep 22
KLM Logo
10:40 pm - 7:15 am
SEA
-
LCY
24h 35m
2 stops
KLM Logo
10:00 am - 10:05 pm
LCY
-
SEA
20h 05m
2 stops
$938KLM
Sat, Aug 8 - Fri, Aug 28

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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
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
$931
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
$932
KLM
Aug 8
SEA10:40 pmSeattle/Tacoma Intl
24h 35m
2 stops
LCY7:15 amLondon City
Aug 28
LCY10:00 amLondon City
20h 05m
2 stops
SEA10:05 pmSeattle/Tacoma Intl
$938

Virgin Atlantic flights from Seattle to London City Airport

Our best Virgin Atlantic deals on Seattle to London City Airport flight tickets
Virgin Atlantic
Sep 29
SEA7:20 amSeattle/Tacoma Intl
18h 10m
2 stops
LCY9:30 amLondon City
Sep 30
LCY5:50 pmLondon City
26h 02m
1 stop
SEA11:52 amSeattle/Tacoma Intl
$864
Virgin Atlantic
Sep 6
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Nov 18
LCY8:05 pmLondon City
23h 42m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$922
Virgin Atlantic
Aug 24
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 31
LCY8:15 pmLondon City
23h 32m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$934

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 April 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

Mon 10/5

3:30 pm-5:30 pm

2 stops18h 00m

London City

Wed 10/7

9:15 am-6:32 pm

2 stops17h 17m

$824

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

7:20 am-9:30 am

2 stops18h 10m

London City

Wed 9/30

5:50 pm-11:52 am

1 stop26h 02m

$864

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/6

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 11/18

8:05 pm-11:47 am

1 stop23h 42m

$922

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 9/30

10:00 am-4:35 pm

1 stop14h 35m

$931
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

$932

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/5

10:30 am-12:35 pm

2 stops18h 05m

London City

Tue 10/13

7:15 pm-6:32 pm

2 stops31h 17m

$933

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/24

1:50 pm-9:30 am

1 stop11h 40m

London City

Mon 8/31

8:15 pm-11:47 am

1 stop23h 32m

$934

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/5

5:20 am-9:30 am

2 stops20h 10m

London City

Wed 8/19

9:20 am-4:27 pm

1 stop15h 07m

$936

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/8

3:33 pm-5:25 pm

2 stops17h 52m

London City

Tue 9/22

9:15 am-6:32 pm

2 stops17h 17m

$937

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 8/8

10:40 pm-7:15 am

2 stops24h 35m

London City

Fri 8/28

10:00 am-10:05 pm

2 stops20h 05m

$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, SWISS, 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 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 many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London City Airport?

  • 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.

  • What is the most popular airline from Seattle to London City Airport?

Best airlines flying from Seattle to London City Airport

Compare and see reviews for airlines that fly from Seattle to London City Airport with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $962Free CancellationRating
7.4
1,761 reviews
Search Scandinavian Airlines flights

Traveling to a place near London?

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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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