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Cheap flights from Seattle to London from $308

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 11/5. 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
8:00 am - 10:20 am
SEA
-
LCY
18h 20m
2 stops
Multiple Airlines Logo
8:00 am - 6:32 pm
LCY
-
SEA
18h 32m
2 stops
$781Multiple Airlines
Sun, Oct 11 - Mon, Oct 19
Multiple Airlines Logo
8:00 am - 10:20 am
SEA
-
LCY
18h 20m
2 stops
Multiple Airlines Logo
6:45 am - 5:10 pm
LCY
-
SEA
18h 25m
1 stop
$803Multiple Airlines
Sun, Oct 11 - Mon, Oct 19
SWISS Logo
7:00 am - 12:35 pm
SEA
-
LCY
21h 35m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$826SWISS
Mon, Sep 28 - Wed, Sep 30
SWISS Logo
10:40 am - 5:25 pm
SEA
-
LCY
22h 45m
2 stops
SWISS Logo
1:10 pm - 7:07 pm
LCY
-
SEA
37h 57m
2 stops
$832SWISS
Tue, Aug 18 - Thu, Aug 20
SWISS Logo
3:18 pm - 5:25 pm
SEA
-
LCY
18h 07m
2 stops
SWISS Logo
9:15 am - 10:56 pm
LCY
-
SEA
21h 41m
2 stops
$836SWISS
Tue, Sep 29 - Thu, Oct 1
SWISS Logo
7:00 am - 12:35 pm
SEA
-
LCY
21h 35m
2 stops
SWISS Logo
9:15 am - 11:26 pm
LCY
-
SEA
22h 11m
2 stops
$861SWISS
Wed, Aug 19 - Fri, Aug 21
SWISS Logo
10:40 am - 5:25 pm
SEA
-
LCY
22h 45m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$878SWISS
Wed, Aug 12 - Wed, Sep 23
SWISS Logo
10:40 am - 5:25 pm
SEA
-
LCY
22h 45m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$879SWISS
Wed, Aug 12 - Wed, Sep 16
Virgin Atlantic Logo
5:45 pm - 4:40 pm
SEA
-
LCY
14h 55m
1 stop
Virgin Atlantic Logo
9:20 am - 4:35 pm
LCY
-
SEA
15h 15m
1 stop
$880Virgin Atlantic
Tue, Oct 13 - Tue, Oct 20
Virgin Atlantic Logo
7:15 am - 9:30 am
SEA
-
LCY
18h 15m
2 stops
Virgin Atlantic Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$884Virgin Atlantic
Tue, Oct 13 - Tue, Oct 20

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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 11
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 25
LCY8:15 pmLondon City
28h 45m
2 stops
SEA5:00 pmSeattle/Tacoma Intl
$891
KLM
Aug 10
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 26
LCY7:45 amLondon City
17h 15m
2 stops
SEA5:00 pmSeattle/Tacoma Intl
$892
KLM
Aug 12
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Sep 10
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$928

SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Sep 28
SEA7:00 amSeattle/Tacoma Intl
21h 35m
2 stops
LCY12:35 pmLondon City
Sep 30
LCY9:15 amLondon City
17h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$826
SWISS
Aug 18
SEA10:40 amSeattle/Tacoma Intl
22h 45m
2 stops
LCY5:25 pmLondon City
Aug 20
LCY1:10 pmLondon City
37h 57m
2 stops
SEA7:07 pmSeattle/Tacoma Intl
$832
SWISS
Sep 29
SEA3:18 pmSeattle/Tacoma Intl
18h 07m
2 stops
LCY5:25 pmLondon City
Oct 1
LCY9:15 amLondon City
21h 41m
2 stops
SEA10:56 pmSeattle/Tacoma Intl
$836

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 15, 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 10/11

8:00 am-10:20 am

2 stops18h 20m

London City

Mon 10/19

8:00 am-6:32 pm

2 stops18h 32m

$781

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/11

8:00 am-10:20 am

2 stops18h 20m

London City

Mon 10/19

6:45 am-5:10 pm

1 stop18h 25m

$803

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/28

7:00 am-12:35 pm

2 stops21h 35m

London City

Wed 9/30

9:15 am-6:32 pm

2 stops17h 17m

$826

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

10:40 am-5:25 pm

2 stops22h 45m

London City

Thu 8/20

1:10 pm-7:07 pm

2 stops37h 57m

$832

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

3:18 pm-5:25 pm

2 stops18h 07m

London City

Thu 10/1

9:15 am-10:56 pm

2 stops21h 41m

$836

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/19

7:00 am-12:35 pm

2 stops21h 35m

London City

Fri 8/21

9:15 am-11:26 pm

2 stops22h 11m

$861

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/12

10:40 am-5:25 pm

2 stops22h 45m

London City

Wed 9/23

9:15 am-6:32 pm

2 stops17h 17m

$878

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/12

10:40 am-5:25 pm

2 stops22h 45m

London City

Wed 9/16

9:15 am-6:32 pm

2 stops17h 17m

$879
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/13

5:45 pm-4:40 pm

1 stop14h 55m

London City

Tue 10/20

9:20 am-4:35 pm

1 stop15h 15m

$880

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/13

7:15 am-9:30 am

2 stops18h 15m

London City

Tue 10/20

10:00 am-4:35 pm

1 stop14h 35m

$884

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 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
Wembley
Croydon
Stansted
Slough
Harrow
Kingston upon Thames
Watford
Brentwood
Ilford
Cobham
Folkestone
Guildford
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.

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