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Cheap flights from Seattle to London from $399

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 3/14. 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.
Lufthansa Logo
2:10 pm - 6:35 pm
SEA
-
LCY
20h 25m1 stop
Lufthansa Logo
9:15 am - 10:20 pm
LCY
-
SEA
21h 05m2 stops
$648Lufthansa
Mon, Apr 27 - Wed, May 20
Virgin Atlantic Logo
3:10 pm - 4:35 pm
SEA
-
LCY
17h 25m1 stop
Virgin Atlantic Logo
5:50 pm - 11:40 am
LCY
-
SEA
25h 50m1 stop
$649Virgin Atlantic
Mon, Jan 26 - Mon, Feb 2
Virgin Atlantic Logo
3:10 pm - 5:20 pm
SEA
-
LCY
18h 10m1 stop
Virgin Atlantic Logo
5:05 pm - 11:50 am
LCY
-
SEA
26h 45m1 stop
$650Virgin Atlantic
Tue, Jan 20 - Fri, Jan 30
Virgin Atlantic Logo
7:10 am - 9:30 am
SEA
-
LCY
18h 20m2 stops
Virgin Atlantic Logo
8:05 pm - 11:40 am
LCY
-
SEA
23h 35m1 stop
$653Virgin Atlantic
Fri, Jan 23 - Sun, Feb 1
Virgin Atlantic Logo
6:05 am - 7:15 am
SEA
-
LCY
17h 10m2 stops
Virgin Atlantic Logo
5:50 pm - 11:50 am
LCY
-
SEA
26h 00m1 stop
$654Virgin Atlantic
Tue, Jan 20 - Fri, Jan 30
Virgin Atlantic Logo
3:10 pm - 4:35 pm
SEA
-
LCY
17h 25m1 stop
Virgin Atlantic Logo
5:50 pm - 3:28 pm
LCY
-
SEA
29h 38m2 stops
$659Virgin Atlantic
Wed, Jan 14 - Sun, Jan 18
Virgin Atlantic Logo
3:10 pm - 4:35 pm
SEA
-
LCY
17h 25m1 stop
Virgin Atlantic Logo
8:40 am - 11:15 pm
LCY
-
SEA
22h 35m2 stops
$660Virgin Atlantic
Tue, Jan 13 - Fri, Jan 23
SWISS Logo
12:35 pm - 5:10 pm
SEA
-
LCY
20h 35m2 stops
SWISS Logo
12:15 pm - 9:12 pm
LCY
-
SEA
40h 57m2 stops
$661SWISS
Sun, Jan 18 - Sat, Jan 31
SWISS Logo
10:58 am - 12:55 pm
SEA
-
LCY
17h 57m2 stops
SWISS Logo
9:20 am - 9:01 pm
LCY
-
SEA
19h 41m2 stops
$662SWISS
Sun, Jan 25 - Fri, Feb 27
SWISS Logo
10:55 am - 12:55 pm
SEA
-
LCY
18h 00m2 stops
SWISS Logo
9:15 am - 9:01 pm
LCY
-
SEA
19h 46m2 stops
$663SWISS
Wed, Feb 18 - Tue, Feb 24

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Apr 27
SEA2:10 pmSeattle/Tacoma Intl
20h 25m
1 stop
LCY6:35 pmLondon City
May 20
LCY9:15 amLondon City
21h 05m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
$648
Find similar
Lufthansa
Mar 25
SEA4:10 pmSeattle/Tacoma Intl
18h 30m
2 stops
LCY5:40 pmLondon City
Apr 8
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$701
Find similar
Lufthansa
Mar 5
SEA2:00 pmSeattle/Tacoma Intl
19h 40m
1 stop
LCY5:40 pmLondon City
Mar 15
LCY5:15 pmLondon City
26h 55m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$746
Find similar

Virgin Atlantic flights from Seattle to London City Airport

Our best Virgin Atlantic deals on Seattle to London City Airport flight tickets
Virgin Atlantic
Jan 26
SEA3:10 pmSeattle/Tacoma Intl
17h 25m
1 stop
LCY4:35 pmLondon City
Feb 2
LCY5:50 pmLondon City
25h 50m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$649
Find similar
Virgin Atlantic
Jan 20
SEA3:10 pmSeattle/Tacoma Intl
18h 10m
1 stop
LCY5:20 pmLondon City
Jan 30
LCY5:05 pmLondon City
26h 45m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$650
Find similar
Virgin Atlantic
Jan 23
SEA7:10 amSeattle/Tacoma Intl
18h 20m
2 stops
LCY9:30 amLondon City
Feb 1
LCY8:05 pmLondon City
23h 35m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$653
Find similar

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 December 14, 2025.
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

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 4/27

2:10 pm-6:35 pm

1 stop20h 25m

London City

Wed 5/20

9:15 am-10:20 pm

2 stops21h 05m

$648

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 1/26

3:10 pm-4:35 pm

1 stop17h 25m

London City

Mon 2/2

5:50 pm-11:40 am

1 stop25h 50m

$649

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 1/20

3:10 pm-5:20 pm

1 stop18h 10m

London City

Fri 1/30

5:05 pm-11:50 am

1 stop26h 45m

$650

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Fri 1/23

7:10 am-9:30 am

2 stops18h 20m

London City

Sun 2/1

8:05 pm-11:40 am

1 stop23h 35m

$653

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 1/20

6:05 am-7:15 am

2 stops17h 10m

London City

Fri 1/30

5:50 pm-11:50 am

1 stop26h 00m

$654

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-4:35 pm

1 stop17h 25m

London City

Sun 1/18

5:50 pm-3:28 pm

2 stops29h 38m

$659

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 1/13

3:10 pm-4:35 pm

1 stop17h 25m

London City

Fri 1/23

8:40 am-11:15 pm

2 stops22h 35m

$660

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 1/18

12:35 pm-5:10 pm

2 stops20h 35m

London City

Sat 1/31

12:15 pm-9:12 pm

2 stops40h 57m

$661

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 1/25

10:58 am-12:55 pm

2 stops17h 57m

London City

Fri 2/27

9:20 am-9:01 pm

2 stops19h 41m

$662

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 2/18

10:55 am-12:55 pm

2 stops18h 00m

London City

Tue 2/24

9:15 am-9:01 pm

2 stops19h 46m

$663

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?

Lufthansa, United Airlines, and SWISS 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

13h 15m

Direct flights

None
The fastest flight from Seattle to London City Airport takes 13h 15m
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 13h 15m.

  • 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
7.4
1,606 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
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Wembley
Watford
Ilford
Cobham
Folkestone
Romford
Richmond
Uxbridge
Stansted

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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