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Cheap flights from Seattle to London from $381

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 10/2. 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

Logo
11:05 am - 12:50 pmSEA-LCY
17h 45m2 stops
Logo
9:15 am - 10:16 pmLCY-SEA
20h 01m2 stops
$551
Find Deal
Wed, Mar 4 - Tue, Mar 10
SWISS Logo
1:00 pm - 8:50 amSEA-LCY
35h 50m2 stops
SWISS Logo
9:25 am - 6:36 pmLCY-SEA
17h 11m2 stops
$558SWISS
Find Deal
Wed, Oct 1 - Tue, Oct 14
SWISS Logo
2:47 pm - 6:40 pmSEA-LCY
20h 53m2 stops
SWISS Logo
7:10 pm - 10:29 pmLCY-SEA
34h 19m2 stops
$563SWISS
Find Deal
Wed, Mar 11 - Tue, Mar 17
Delta Logo
5:40 pm - 4:40 pmSEA-LCY
15h 00m1 stop
Delta Logo
10:00 am - 4:05 pmLCY-SEA
14h 05m1 stop
$567Delta
Find Deal
Wed, Oct 1 - Fri, Oct 10
Delta Logo
3:00 pm - 4:35 pmSEA-LCY
17h 35m1 stop
Delta Logo
10:00 am - 11:50 amLCY-SEA
33h 50m1 stop
$568Delta
Find Deal
Mon, Nov 17 - Wed, Dec 3
Delta Logo
7:10 am - 4:35 pmSEA-LCY
25h 25m2 stops
Delta Logo
9:20 am - 11:50 amLCY-SEA
34h 30m1 stop
$572Delta
Find Deal
Mon, Nov 17 - Wed, Dec 3
Virgin Atlantic Logo
3:05 pm - 4:35 pmSEA-LCY
17h 30m1 stop
Virgin Atlantic Logo
8:05 pm - 11:40 amLCY-SEA
23h 35m1 stop
$575Virgin Atlantic
Find Deal
Wed, Feb 11 - Tue, Feb 17
Virgin Atlantic Logo
3:05 pm - 5:20 pmSEA-LCY
18h 15m1 stop
Virgin Atlantic Logo
5:50 pm - 11:40 amLCY-SEA
25h 50m1 stop
$576Virgin Atlantic
Find Deal
Mon, Feb 9 - Mon, Feb 16
Lufthansa Logo
3:00 pm - 4:40 pmSEA-LCY
18h 40m1 stop
Lufthansa Logo
6:15 pm - 1:10 pmLCY-SEA
25h 55m1 stop
$617Lufthansa
Find Deal
Mon, Mar 9 - Mon, Mar 16
Lufthansa Logo
2:20 pm - 4:25 pmSEA-LCY
18h 05m1 stop
Lufthansa Logo
7:10 pm - 11:55 amLCY-SEA
24h 45m1 stop
$620Lufthansa
Find Deal
Sun, Oct 5 - Tue, Oct 14

Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Oct 1
SEA5:40 pmSeattle/Tacoma Intl
15h 00m
1 stop
LCY4:40 pmLondon City
Oct 10
LCY10:00 amLondon City
14h 05m
1 stop
SEA4:05 pmSeattle/Tacoma Intl
$567
Find similar
Delta
Nov 17
SEA3:00 pmSeattle/Tacoma Intl
17h 35m
1 stop
LCY4:35 pmLondon City
Dec 3
LCY10:00 amLondon City
33h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$568
Find similar
Delta
Nov 17
SEA7:10 amSeattle/Tacoma Intl
25h 25m
2 stops
LCY4:35 pmLondon City
Dec 3
LCY9:20 amLondon City
34h 30m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$572
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
Feb 11
SEA3:05 pmSeattle/Tacoma Intl
17h 30m
1 stop
LCY4:35 pmLondon City
Feb 17
LCY8:05 pmLondon City
23h 35m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$575
Find similar
Virgin Atlantic
Feb 9
SEA3:05 pmSeattle/Tacoma Intl
18h 15m
1 stop
LCY5:20 pmLondon City
Feb 16
LCY5:50 pmLondon City
25h 50m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$576
Find similar
Virgin Atlantic
Oct 14
SEA2:00 pmSeattle/Tacoma Intl
19h 20m
1 stop
LCY5:20 pmLondon City
Oct 21
LCY9:20 amLondon City
21h 05m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$578
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 September 15, 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

Wed 3/4

11:05 am-12:50 pm

2 stops17h 45m

London City

Tue 3/10

9:15 am-10:16 pm

2 stops20h 01m

$551

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/1

1:00 pm-8:50 am

2 stops35h 50m

London City

Tue 10/14

9:25 am-6:36 pm

2 stops17h 11m

$558

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 3/11

2:47 pm-6:40 pm

2 stops20h 53m

London City

Tue 3/17

7:10 pm-10:29 pm

2 stops34h 19m

$563

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/1

5:40 pm-4:40 pm

1 stop15h 00m

London City

Fri 10/10

10:00 am-4:05 pm

1 stop14h 05m

$567

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/17

3:00 pm-4:35 pm

1 stop17h 35m

London City

Wed 12/3

10:00 am-11:50 am

1 stop33h 50m

$568

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/17

7:10 am-4:35 pm

2 stops25h 25m

London City

Wed 12/3

9:20 am-11:50 am

1 stop34h 30m

$572

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 2/11

3:05 pm-4:35 pm

1 stop17h 30m

London City

Tue 2/17

8:05 pm-11:40 am

1 stop23h 35m

$575

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 2/9

3:05 pm-5:20 pm

1 stop18h 15m

London City

Mon 2/16

5:50 pm-11:40 am

1 stop25h 50m

$576

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 3/9

3:00 pm-4:40 pm

1 stop18h 40m

London City

Mon 3/16

6:15 pm-1:10 pm

1 stop25h 55m

$617

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/5

2:20 pm-4:25 pm

1 stop18h 05m

London City

Tue 10/14

7:10 pm-11:55 am

1 stop24h 45m

$620

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?

SWISS, United Airlines, and Lufthansa 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

Direct flights

None
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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  • 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 15h 00m.

  • 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
1,484 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
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Brentwood
Ilford
Folkestone
Colchester
Watford
Wembley
Richmond
Croydon

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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