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Cheap flights from Seattle to London from $470

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 9/15. 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

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
6:05 pm - 6:32 pm
LCY
-
SEA
32h 27m
2 stops
$823SWISS
Sun, Oct 18 - Tue, Oct 20
SWISS Logo
7:00 am - 5:25 pm
SEA
-
LCY
26h 25m
2 stops
SWISS Logo
1:10 pm - 6:32 pm
LCY
-
SEA
37h 22m
2 stops
$873SWISS
Sat, Sep 19 - Mon, Sep 21
SWISS Logo
7:00 am - 6:40 pm
SEA
-
LCY
27h 40m
2 stops
SWISS Logo
6:00 pm - 6:32 pm
LCY
-
SEA
32h 32m
2 stops
$874SWISS
Sat, Sep 19 - Mon, Sep 21
SWISS Logo
7:00 am - 12:35 pm
SEA
-
LCY
21h 35m
2 stops
SWISS Logo
9:15 am - 10:29 pm
LCY
-
SEA
21h 14m
2 stops
$895SWISS
Tue, Oct 13 - Tue, Oct 20
Virgin Atlantic Logo
1:50 pm - 8:15 pm
SEA
-
LCY
22h 25m
1 stop
Virgin Atlantic Logo
8:15 pm - 11:47 am
LCY
-
SEA
23h 32m
1 stop
$909Virgin Atlantic
Sat, Sep 19 - Mon, Sep 21
SWISS Logo
10:45 am - 5:25 pm
SEA
-
LCY
22h 40m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$911SWISS
Tue, Aug 18 - Wed, Sep 30
SWISS Logo
7:00 am - 5:25 pm
SEA
-
LCY
26h 25m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$915SWISS
Sun, Sep 20 - Wed, Sep 30
KLM Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
KLM Logo
10:00 am - 4:39 pm
LCY
-
SEA
14h 39m
1 stop
$931KLM
Sun, Oct 11 - Wed, Oct 21
Delta Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Delta Logo
8:25 am - 4:35 pm
LCY
-
SEA
16h 10m
1 stop
$932Delta
Tue, Aug 18 - Wed, Sep 30
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

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SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Oct 18
SEA7:00 amSeattle/Tacoma Intl
27h 40m
2 stops
LCY6:40 pmLondon City
Oct 20
LCY6:05 pmLondon City
32h 27m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$823
SWISS
Sep 19
SEA7:00 amSeattle/Tacoma Intl
26h 25m
2 stops
LCY5:25 pmLondon City
Sep 21
LCY1:10 pmLondon City
37h 22m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$873
SWISS
Sep 19
SEA7:00 amSeattle/Tacoma Intl
27h 40m
2 stops
LCY6:40 pmLondon City
Sep 21
LCY6:00 pmLondon City
32h 32m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$874

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 19
SEA1:50 pmSeattle/Tacoma Intl
22h 25m
1 stop
LCY8:15 pmLondon City
Sep 21
LCY8:15 pmLondon City
23h 32m
1 stop
SEA11:47 amSeattle/Tacoma Intl
$909
Virgin Atlantic
Sep 14
SEA5:40 pmSeattle/Tacoma Intl
15h 40m
1 stop
LCY5:20 pmLondon City
Sep 24
LCY9:20 amLondon City
20h 45m
2 stops
SEA10:05 pmSeattle/Tacoma Intl
$942
Virgin Atlantic
Oct 6
SEA5:40 pmSeattle/Tacoma Intl
16h 50m
1 stop
LCY6:30 pmLondon City
Oct 13
LCY9:20 amLondon City
20h 52m
2 stops
SEA10:12 pmSeattle/Tacoma Intl
$943

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 May 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

Sun 10/18

7:00 am-6:40 pm

2 stops27h 40m

London City

Tue 10/20

6:05 pm-6:32 pm

2 stops32h 27m

$823

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 9/19

7:00 am-5:25 pm

2 stops26h 25m

London City

Mon 9/21

1:10 pm-6:32 pm

2 stops37h 22m

$873

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 9/19

7:00 am-6:40 pm

2 stops27h 40m

London City

Mon 9/21

6:00 pm-6:32 pm

2 stops32h 32m

$874

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/13

7:00 am-12:35 pm

2 stops21h 35m

London City

Tue 10/20

9:15 am-10:29 pm

2 stops21h 14m

$895

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 9/19

1:50 pm-8:15 pm

1 stop22h 25m

London City

Mon 9/21

8:15 pm-11:47 am

1 stop23h 32m

$909

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

10:45 am-5:25 pm

2 stops22h 40m

London City

Wed 9/30

9:15 am-6:32 pm

2 stops17h 17m

$911

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/20

7:00 am-5:25 pm

2 stops26h 25m

London City

Wed 9/30

9:15 am-6:32 pm

2 stops17h 17m

$915
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/11

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 10/21

10:00 am-4:39 pm

1 stop14h 39m

$931

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 9/30

8:25 am-4:35 pm

1 stop16h 10m

$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

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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.
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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?

Frequently asked questions about flying from Seattle to London City Airport

  • How do I get Price Alerts for flights from Seattle to London City Airport?

    Confirm your travel details to search for the latest offers for flights from Seattle to London City Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Seattle to London City Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Dover
Luton
Hayes
Crawley
Slough
Wembley
Stansted
Watford
Croydon
Uxbridge
Brentwood
Dartford
Cobham
Folkestone
Romford
Harrow
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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