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Cheap flights from Seattle to London from $402

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 7/27. 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

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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.
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
6:30 pm - 12:20 pm
LCY
-
SEA
25h 50m
1 stop
$731Lufthansa
Tue, Apr 7 - Tue, Apr 14
Delta Logo
5:35 pm - 4:40 pm
SEA
-
LCY
15h 05m
1 stop
Delta Logo
9:20 am - 4:30 pm
LCY
-
SEA
15h 10m
1 stop
$734Delta
Mon, Apr 6 - Wed, Apr 22
Virgin Atlantic Logo
5:35 pm - 4:40 pm
SEA
-
LCY
15h 05m
1 stop
Virgin Atlantic Logo
10:00 am - 4:30 pm
LCY
-
SEA
14h 30m
1 stop
$737Virgin Atlantic
Mon, Apr 6 - Tue, Apr 21
Virgin Atlantic Logo
6:00 am - 8:50 am
SEA
-
LCY
18h 50m
2 stops
Virgin Atlantic Logo
5:50 pm - 11:42 am
LCY
-
SEA
25h 52m
1 stop
$738Virgin Atlantic
Tue, Apr 21 - Tue, May 19
KLM Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
KLM Logo
9:20 am - 4:30 pm
LCY
-
SEA
15h 10m
1 stop
$739KLM
Sun, May 3 - Wed, May 13
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
1:10 pm - 6:30 pm
LCY
-
SEA
37h 20m
2 stops
$740SWISS
Wed, Apr 29 - Wed, May 6
Virgin Atlantic Logo
5:35 pm - 5:20 pm
SEA
-
LCY
15h 45m
1 stop
Virgin Atlantic Logo
8:25 am - 8:25 pm
LCY
-
SEA
20h 00m
2 stops
$744Virgin Atlantic
Sun, Apr 19 - Tue, Apr 28
SWISS Logo
10:30 am - 6:40 pm
SEA
-
LCY
24h 10m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$746SWISS
Tue, Sep 1 - Tue, Sep 8
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
$747Lufthansa
Wed, Apr 8 - Wed, Apr 22
SWISS Logo
1:21 pm - 5:30 pm
SEA
-
LCY
20h 09m
2 stops
SWISS Logo
9:15 am - 10:47 pm
LCY
-
SEA
21h 32m
2 stops
$750SWISS
Mon, May 4 - Tue, May 12

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Apr 7
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Apr 14
LCY6:30 pmLondon City
25h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$731
Lufthansa
Apr 8
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Apr 22
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$747
Lufthansa
Apr 21
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
May 4
LCY9:15 amLondon City
17h 15m
2 stops
SEA6:30 pmSeattle/Tacoma Intl
$761

Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Apr 6
SEA5:35 pmSeattle/Tacoma Intl
15h 05m
1 stop
LCY4:40 pmLondon City
Apr 22
LCY9:20 amLondon City
15h 10m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$734
Delta
Apr 12
SEA5:35 pmSeattle/Tacoma Intl
15h 05m
1 stop
LCY4:40 pmLondon City
Apr 22
LCY10:00 amLondon City
14h 30m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$782
Delta
Mar 24
SEA4:05 pmSeattle/Tacoma Intl
17h 30m
1 stop
LCY4:35 pmLondon City
Mar 31
LCY9:20 amLondon City
15h 10m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$820

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 March 13, 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

Tue 4/7

2:10 pm-5:55 pm

1 stop19h 45m

London City

Tue 4/14

6:30 pm-12:20 pm

1 stop25h 50m

$731

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 4/6

5:35 pm-4:40 pm

1 stop15h 05m

London City

Wed 4/22

9:20 am-4:30 pm

1 stop15h 10m

$734

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 4/6

5:35 pm-4:40 pm

1 stop15h 05m

London City

Tue 4/21

10:00 am-4:30 pm

1 stop14h 30m

$737

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 4/21

6:00 am-8:50 am

2 stops18h 50m

London City

Tue 5/19

5:50 pm-11:42 am

1 stop25h 52m

$738
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 5/3

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 5/13

9:20 am-4:30 pm

1 stop15h 10m

$739

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 4/29

7:00 am-8:40 am

2 stops17h 40m

London City

Wed 5/6

1:10 pm-6:30 pm

2 stops37h 20m

$740

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 4/19

5:35 pm-5:20 pm

1 stop15h 45m

London City

Tue 4/28

8:25 am-8:25 pm

2 stops20h 00m

$744

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/1

10:30 am-6:40 pm

2 stops24h 10m

London City

Tue 9/8

9:15 am-6:32 pm

2 stops17h 17m

$746

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 4/8

2:10 pm-5:55 pm

1 stop19h 45m

London City

Wed 4/22

9:15 am-4:59 pm

2 stops15h 44m

$747

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 5/4

1:21 pm-5:30 pm

2 stops20h 09m

London City

Tue 5/12

9:15 am-10:47 pm

2 stops21h 32m

$750

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, KLM, and Virgin Atlantic 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

  • 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 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?

Best airlines flying from Seattle to London City Airport

Compare and see reviews for airlines that fly from Seattle to London City Airport with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $962Free CancellationRating
7.3
1,712 reviews
Search Scandinavian Airlines flights

Traveling to a place near London?

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

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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