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Cheap flights from Seattle to London from $423

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 4/27. 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.
Multiple Airlines Logo
7:00 pm - 9:30 am
SEA
-
LCY
30h 30m
3 stops
Multiple Airlines Logo
8:45 pm - 8:40 pm
LCY
-
SEA
31h 55m
3 stops
$700Multiple Airlines
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
7:00 pm - 9:30 am
SEA
-
LCY
30h 30m
3 stops
Multiple Airlines Logo
8:45 pm - 5:55 pm
LCY
-
SEA
29h 10m
3 stops
$701Multiple Airlines
Sun, May 3 - Sun, May 10
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
$878Lufthansa
Sun, Oct 4 - Thu, Oct 15
SWISS Logo
7:00 am - 6:40 pm
SEA
-
LCY
27h 40m
2 stops
SWISS Logo
8:00 am - 6:32 pm
LCY
-
SEA
18h 32m
2 stops
$881SWISS
Mon, Oct 5 - Mon, Oct 12
Lufthansa Logo
1:56 pm - 5:55 pm
SEA
-
LCY
19h 59m
2 stops
Lufthansa Logo
9:15 am - 4:59 pm
LCY
-
SEA
15h 44m
2 stops
$882Lufthansa
Mon, Aug 17 - Tue, Aug 25
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
6:30 pm - 4:59 pm
LCY
-
SEA
30h 29m
2 stops
$886Lufthansa
Mon, Oct 5 - Mon, Oct 12
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
7:15 pm - 6:59 pm
LCY
-
SEA
31h 44m
2 stops
$892SWISS
Wed, Aug 19 - Mon, Aug 31
SWISS Logo
11:00 am - 8:40 am
SEA
-
LCY
37h 40m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$914SWISS
Tue, Oct 6 - Wed, Oct 21
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
$917Lufthansa
Mon, Oct 5 - Mon, Oct 12
SWISS Logo
4:30 pm - 1:45 pm
SEA
-
LCY
13h 15m
1 stop
SWISS Logo
9:00 am - 2:35 pm
LCY
-
SEA
13h 35m
1 stop
$918SWISS
Sat, Sep 5 - Sat, Sep 12

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Oct 4
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 15
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$878
Lufthansa
Oct 5
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 12
LCY6:30 pmLondon City
30h 29m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$886
Lufthansa
Oct 5
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 12
LCY6:30 pmLondon City
25h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$917

SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Oct 5
SEA7:00 amSeattle/Tacoma Intl
27h 40m
2 stops
LCY6:40 pmLondon City
Oct 12
LCY8:00 amLondon City
18h 32m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$881
SWISS
Aug 19
SEA7:00 amSeattle/Tacoma Intl
17h 40m
2 stops
LCY8:40 amLondon City
Aug 31
LCY7:15 pmLondon City
31h 44m
2 stops
SEA6:59 pmSeattle/Tacoma Intl
$892
SWISS
Oct 6
SEA11:00 amSeattle/Tacoma Intl
37h 40m
2 stops
LCY8:40 amLondon City
Oct 21
LCY9:15 amLondon City
17h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$914

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 April 10, 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 5/3

7:00 pm-9:30 am

3 stops30h 30m

London City

Sun 5/10

8:45 pm-8:40 pm

3 stops31h 55m

$700

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 5/3

7:00 pm-9:30 am

3 stops30h 30m

London City

Sun 5/10

8:45 pm-5:55 pm

3 stops29h 10m

$701

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/4

2:10 pm-5:55 pm

1 stop19h 45m

London City

Thu 10/15

9:15 am-4:59 pm

2 stops15h 44m

$878

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/5

7:00 am-6:40 pm

2 stops27h 40m

London City

Mon 10/12

8:00 am-6:32 pm

2 stops18h 32m

$881

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/17

1:56 pm-5:55 pm

2 stops19h 59m

London City

Tue 8/25

9:15 am-4:59 pm

2 stops15h 44m

$882

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/5

2:10 pm-5:55 pm

1 stop19h 45m

London City

Mon 10/12

6:30 pm-4:59 pm

2 stops30h 29m

$886

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/19

7:00 am-8:40 am

2 stops17h 40m

London City

Mon 8/31

7:15 pm-6:59 pm

2 stops31h 44m

$892

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

11:00 am-8:40 am

2 stops37h 40m

London City

Wed 10/21

9:15 am-6:32 pm

2 stops17h 17m

$914

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/5

2:10 pm-5:55 pm

1 stop19h 45m

London City

Mon 10/12

6:30 pm-12:20 pm

1 stop25h 50m

$917
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 9/5

4:30 pm-1:45 pm

1 stop13h 15m

London City

Sat 9/12

9:00 am-2:35 pm

1 stop13h 35m

$918

Flights are sorted by cheapest round-trip flights first.

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

KLM, Delta, and United Airlines 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 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.
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 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?

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
1,748 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
Hayes
Slough
Wembley
Crawley
Stansted
Croydon
Dartford
Brentwood
Cobham
Folkestone
Guildford
Romford
Harrow
Watford
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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