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Cheap flights from Seattle to London from $341

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 12/9. 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.
SWISS Logo
7:00 am - 6:40 pm
SEA
-
LCY
27h 40m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$827SWISS
Mon, Sep 28 - Wed, Sep 30
Virgin Atlantic Logo
1:50 pm - 4:40 pm
SEA
-
LCY
18h 50m
1 stop
Virgin Atlantic Logo
8:25 am - 7:16 pm
LCY
-
SEA
18h 51m
2 stops
$866Virgin Atlantic
Mon, Sep 28 - Wed, Sep 30
Virgin Atlantic Logo
5:45 pm - 4:40 pm
SEA
-
LCY
14h 55m
1 stop
Virgin Atlantic Logo
5:05 pm - 12:47 pm
LCY
-
SEA
26h 42m
1 stop
$877Virgin Atlantic
Wed, Oct 21 - Wed, Oct 28
Delta Logo
2:35 pm - 4:35 pm
SEA
-
LCY
18h 00m
1 stop
Delta Logo
10:00 am - 11:50 am
LCY
-
SEA
33h 50m
1 stop
$880Delta
Mon, Nov 16 - Thu, Dec 3
Virgin Atlantic Logo
7:20 am - 9:30 am
SEA
-
LCY
18h 10m
2 stops
Virgin Atlantic Logo
6:55 pm - 12:47 pm
LCY
-
SEA
24h 52m
1 stop
$881Virgin Atlantic
Wed, Oct 21 - Wed, Oct 28
Virgin Atlantic Logo
2:35 pm - 6:25 pm
SEA
-
LCY
19h 50m
1 stop
Virgin Atlantic Logo
5:05 pm - 11:50 am
LCY
-
SEA
26h 45m
1 stop
$883Virgin Atlantic
Mon, Nov 23 - Wed, Dec 2
Virgin Atlantic Logo
6:05 am - 8:10 am
SEA
-
LCY
18h 05m
2 stops
Virgin Atlantic Logo
8:05 pm - 11:47 am
LCY
-
SEA
23h 42m
1 stop
$884Virgin Atlantic
Wed, Nov 11 - Wed, Nov 18
Virgin Atlantic Logo
2:40 pm - 7:35 pm
SEA
-
LCY
20h 55m
1 stop
Virgin Atlantic Logo
5:05 pm - 11:50 am
LCY
-
SEA
26h 45m
1 stop
$886Virgin Atlantic
Mon, Jan 11 - Wed, Jan 20
Virgin Atlantic Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
Virgin Atlantic Logo
7:45 am - 10:05 pm
LCY
-
SEA
22h 20m
2 stops
$887Virgin Atlantic
Wed, Oct 21 - Wed, Nov 25
Virgin Atlantic Logo
6:00 am - 7:15 am
SEA
-
LCY
17h 15m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:50 am
LCY
-
SEA
26h 00m
1 stop
$888Virgin Atlantic
Wed, Nov 18 - Wed, Dec 2

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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 8
SEA5:45 pmSeattle/Tacoma Intl
14h 55m
1 stop
LCY4:40 pmLondon City
Nov 4
LCY10:00 amLondon City
33h 47m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$929
Delta
Aug 17
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
$955
Delta
Sep 1
SEA7:15 amSeattle/Tacoma Intl
18h 15m
2 stops
LCY9:30 amLondon City
Sep 15
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$959

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
27h 40m
2 stops
LCY6:40 pmLondon City
Sep 30
LCY9:15 amLondon City
17h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$827
SWISS
Sep 14
SEA7:00 amSeattle/Tacoma Intl
26h 30m
2 stops
LCY5:30 pmLondon City
Sep 21
LCY6:00 pmLondon City
32h 32m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$899
SWISS
Sep 6
SEA7:00 amSeattle/Tacoma Intl
27h 40m
2 stops
LCY6:40 pmLondon City
Sep 28
LCY7:15 pmLondon City
31h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$900

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 22, 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 9/28

7:00 am-6:40 pm

2 stops27h 40m

London City

Wed 9/30

9:15 am-6:32 pm

2 stops17h 17m

$827

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/28

1:50 pm-4:40 pm

1 stop18h 50m

London City

Wed 9/30

8:25 am-7:16 pm

2 stops18h 51m

$866

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

5:45 pm-4:40 pm

1 stop14h 55m

London City

Wed 10/28

5:05 pm-12:47 pm

1 stop26h 42m

$877

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/16

2:35 pm-4:35 pm

1 stop18h 00m

London City

Thu 12/3

10:00 am-11:50 am

1 stop33h 50m

$880

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

7:20 am-9:30 am

2 stops18h 10m

London City

Wed 10/28

6:55 pm-12:47 pm

1 stop24h 52m

$881

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/23

2:35 pm-6:25 pm

1 stop19h 50m

London City

Wed 12/2

5:05 pm-11:50 am

1 stop26h 45m

$883

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 11/11

6:05 am-8:10 am

2 stops18h 05m

London City

Wed 11/18

8:05 pm-11:47 am

1 stop23h 42m

$884

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 1/11

2:40 pm-7:35 pm

1 stop20h 55m

London City

Wed 1/20

5:05 pm-11:50 am

1 stop26h 45m

$886
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 11/25

7:45 am-10:05 pm

2 stops22h 20m

$887

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 11/18

6:00 am-7:15 am

2 stops17h 15m

London City

Wed 12/2

5:50 pm-11:50 am

1 stop26h 00m

$888

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?

Virgin Atlantic, KLM, 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 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
Kingston upon Thames
Watford
Slough
Harrow
Brentwood
Cobham
Romford
Uxbridge
Guildford
Worthing

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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