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Cheap flights from Seattle to London from $471

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 6/7. 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.
SWISS Logo
10:45 am - 6:40 pm
SEA
-
LCY
23h 55m
2 stops
SWISS Logo
9:15 am - 11:24 pm
LCY
-
SEA
22h 09m
2 stops
$911SWISS
Mon, Aug 17 - Wed, Aug 19
KLM Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
KLM Logo
5:50 pm - 7:05 pm
LCY
-
SEA
32h 15m
2 stops
$913KLM
Mon, Oct 19 - Wed, Oct 28
SWISS Logo
3:33 pm - 12:35 pm
SEA
-
LCY
37h 02m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$923SWISS
Mon, Aug 17 - Thu, Aug 20
SWISS Logo
10:45 am - 5:25 pm
SEA
-
LCY
22h 40m
2 stops
SWISS Logo
9:15 am - 6:59 pm
LCY
-
SEA
41h 44m
2 stops
$928SWISS
Tue, Aug 18 - Thu, Aug 20
KLM Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
KLM Logo
9:20 am - 4:39 pm
LCY
-
SEA
15h 19m
1 stop
$932KLM
Mon, Sep 14 - Wed, Oct 21
Virgin Atlantic Logo
1:45 pm - 6:30 pm
SEA
-
LCY
20h 45m
1 stop
Virgin Atlantic Logo
8:25 am - 8:47 pm
LCY
-
SEA
20h 22m
2 stops
$933Virgin Atlantic
Mon, Oct 12 - Wed, Oct 21
Virgin Atlantic Logo
5:20 am - 8:50 am
SEA
-
LCY
19h 30m
2 stops
Virgin Atlantic Logo
8:15 pm - 11:47 am
LCY
-
SEA
23h 32m
1 stop
$936Virgin Atlantic
Sun, Jul 26 - Tue, Sep 22
Virgin Atlantic Logo
5:10 am - 7:15 am
SEA
-
LCY
18h 05m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:37 am
LCY
-
SEA
25h 47m
1 stop
$937Virgin Atlantic
Mon, Aug 17 - Tue, Aug 25
SWISS Logo
1:19 pm - 5:25 pm
SEA
-
LCY
20h 06m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$938SWISS
Tue, Sep 15 - Tue, Oct 20
Virgin Atlantic Logo
5:40 pm - 5:20 pm
SEA
-
LCY
15h 40m
1 stop
Virgin Atlantic Logo
7:45 am - 10:04 pm
LCY
-
SEA
21h 19m
2 stops
$942Virgin Atlantic
Mon, Oct 19 - Wed, Oct 28

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Aug 4
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Aug 24
LCY9:15 amLondon City
34h 40m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$979
Lufthansa
Sep 1
SEA1:57 pmSeattle/Tacoma Intl
19h 58m
2 stops
LCY5:55 pmLondon City
Sep 17
LCY9:15 amLondon City
34h 40m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$984
Lufthansa
Nov 4
SEA2:00 pmSeattle/Tacoma Intl
19h 40m
1 stop
LCY5:40 pmLondon City
Nov 18
LCY9:50 amLondon City
34h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$985

SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Aug 17
SEA10:45 amSeattle/Tacoma Intl
23h 55m
2 stops
LCY6:40 pmLondon City
Aug 19
LCY9:15 amLondon City
22h 09m
2 stops
SEA11:24 pmSeattle/Tacoma Intl
$911
SWISS
Aug 17
SEA3:33 pmSeattle/Tacoma Intl
37h 02m
2 stops
LCY12:35 pmLondon City
Aug 20
LCY9:15 amLondon City
17h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$923
SWISS
Aug 18
SEA10:45 amSeattle/Tacoma Intl
22h 40m
2 stops
LCY5:25 pmLondon City
Aug 20
LCY9:15 amLondon City
41h 44m
2 stops
SEA6:59 pmSeattle/Tacoma Intl
$928

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 9, 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 8/17

10:45 am-6:40 pm

2 stops23h 55m

London City

Wed 8/19

9:15 am-11:24 pm

2 stops22h 09m

$911

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/19

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 10/28

5:50 pm-7:05 pm

2 stops32h 15m

$913

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/17

3:33 pm-12:35 pm

2 stops37h 02m

London City

Thu 8/20

9:15 am-6:32 pm

2 stops17h 17m

$923

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 8/18

10:45 am-5:25 pm

2 stops22h 40m

London City

Thu 8/20

9:15 am-6:59 pm

2 stops41h 44m

$928
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/14

1:50 pm-9:30 am

1 stop11h 40m

London City

Wed 10/21

9:20 am-4:39 pm

1 stop15h 19m

$932

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/12

1:45 pm-6:30 pm

1 stop20h 45m

London City

Wed 10/21

8:25 am-8:47 pm

2 stops20h 22m

$933

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 7/26

5:20 am-8:50 am

2 stops19h 30m

London City

Tue 9/22

8:15 pm-11:47 am

1 stop23h 32m

$936

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/17

5:10 am-7:15 am

2 stops18h 05m

London City

Tue 8/25

5:50 pm-11:37 am

1 stop25h 47m

$937

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/15

1:19 pm-5:25 pm

2 stops20h 06m

London City

Tue 10/20

7:15 pm-6:32 pm

2 stops31h 17m

$938

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/19

5:40 pm-5:20 pm

1 stop15h 40m

London City

Wed 10/28

7:45 am-10:04 pm

2 stops21h 19m

$942

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 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
Dover
Luton
Hayes
Crawley
Wembley
Slough
Stansted
Watford
Croydon
Brentwood
Dartford
Cobham
Folkestone
Romford
Harrow
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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