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Cheap flights from Seattle to London from $375

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 10/20. 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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0 bags

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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.
Virgin Atlantic Logo
2:30 pm - 5:20 pm
SEA
-
LCY
18h 50m
2 stops
Virgin Atlantic Logo
10:00 am - 8:16 pm
LCY
-
SEA
18h 16m
2 stops
$895Virgin Atlantic
Wed, Sep 23 - Wed, Sep 30
Virgin Atlantic Logo
1:45 pm - 4:40 pm
SEA
-
LCY
18h 55m
2 stops
Virgin Atlantic Logo
7:45 am - 10:05 pm
LCY
-
SEA
21h 20m
2 stops
$896Virgin Atlantic
Wed, Oct 21 - Thu, Oct 29
Delta Logo
9:55 pm - 4:35 pm
SEA
-
LCY
34h 40m
2 stops
Delta Logo
9:20 am - 11:47 am
LCY
-
SEA
34h 27m
1 stop
$897Delta
Sun, Nov 1 - Mon, Nov 16
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
9:15 am - 10:29 pm
LCY
-
SEA
21h 14m
2 stops
$898SWISS
Tue, Oct 6 - Tue, Nov 17
SWISS Logo
7:00 am - 6:40 pm
SEA
-
LCY
27h 40m
2 stops
SWISS Logo
9:15 am - 10:56 pm
LCY
-
SEA
21h 41m
2 stops
$902SWISS
Sun, Sep 20 - Fri, Oct 23
SWISS Logo
7:00 am - 5:25 pm
SEA
-
LCY
26h 25m
2 stops
SWISS Logo
9:15 am - 11:21 pm
LCY
-
SEA
21h 06m
2 stops
$903SWISS
Wed, Oct 21 - Thu, Oct 29
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
7:15 pm - 10:56 pm
LCY
-
SEA
35h 41m
2 stops
$907SWISS
Tue, Oct 6 - Mon, Oct 19
Multiple Airlines Logo
3:40 pm - 5:55 pm
SEA
-
LCY
18h 15m
2 stops
Multiple Airlines Logo
6:30 pm - 8:40 pm
LCY
-
SEA
34h 10m
2 stops
$917Multiple Airlines
Mon, Jul 6 - Mon, Jul 13
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
9:15 am - 4:59 pm
LCY
-
SEA
15h 44m
2 stops
$920Lufthansa
Tue, Sep 15 - Tue, Sep 29
SWISS Logo
10:45 am - 5:25 pm
SEA
-
LCY
22h 40m
2 stops
SWISS Logo
8:00 am - 6:32 pm
LCY
-
SEA
18h 32m
2 stops
$926SWISS
Tue, Aug 25 - Mon, Sep 14

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Aug 30
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Sep 8
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$952
Lufthansa
Aug 16
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Aug 25
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$967
Lufthansa
Aug 16
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Aug 25
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$968

Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Aug 18
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 25
LCY7:45 amLondon City
16h 42m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$931
Delta
Aug 16
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
$1,013

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 June 1, 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

Wed 9/23

2:30 pm-5:20 pm

2 stops18h 50m

London City

Wed 9/30

10:00 am-8:16 pm

2 stops18h 16m

$895

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

1:45 pm-4:40 pm

2 stops18h 55m

London City

Thu 10/29

7:45 am-10:05 pm

2 stops21h 20m

$896

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 11/1

9:55 pm-4:35 pm

2 stops34h 40m

London City

Mon 11/16

9:20 am-11:47 am

1 stop34h 27m

$897

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

7:00 am-8:40 am

2 stops17h 40m

London City

Tue 11/17

9:15 am-10:29 pm

2 stops21h 14m

$898

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/20

7:00 am-6:40 pm

2 stops27h 40m

London City

Fri 10/23

9:15 am-10:56 pm

2 stops21h 41m

$902

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

7:00 am-5:25 pm

2 stops26h 25m

London City

Thu 10/29

9:15 am-11:21 pm

2 stops21h 06m

$903

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

7:00 am-8:40 am

2 stops17h 40m

London City

Mon 10/19

7:15 pm-10:56 pm

2 stops35h 41m

$907

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 7/6

3:40 pm-5:55 pm

2 stops18h 15m

London City

Mon 7/13

6:30 pm-8:40 pm

2 stops34h 10m

$917
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/15

2:10 pm-5:55 pm

1 stop19h 45m

London City

Tue 9/29

9:15 am-4:59 pm

2 stops15h 44m

$920

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/25

10:45 am-5:25 pm

2 stops22h 40m

London City

Mon 9/14

8:00 am-6:32 pm

2 stops18h 32m

$926

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?

KLM, Virgin Atlantic, and Delta 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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