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Cheap flights from Seattle to London from $419

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.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
7:00 am - 6:40 pm
SEA
-
LCY
27h 40m
2 stops
SWISS Logo
9:15 am - 11:24 pm
LCY
-
SEA
22h 09m
2 stops
$834SWISS
Di, Aug 25 - Do, Aug 27
SWISS Logo
3:33 pm - 6:40 pm
SEA
-
LCY
19h 07m
2 stops
SWISS Logo
6:00 pm - 6:59 pm
LCY
-
SEA
32h 59m
2 stops
$884SWISS
Mo, Aug 24 - Mi, Aug 26
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
9:15 am - 8:03 pm
LCY
-
SEA
18h 48m
2 stops
$899Lufthansa
Di, Aug 25 - Do, Aug 27
SWISS Logo
3:33 pm - 12:35 pm
SEA
-
LCY
37h 02m
2 stops
SWISS Logo
9:15 am - 10:42 pm
LCY
-
SEA
21h 27m
2 stops
$916SWISS
Mo, Aug 24 - Do, Aug 27
Virgin Atlantic Logo
5:45 pm - 7:45 pm
SEA
-
LCY
18h 00m
1 stop
Virgin Atlantic Logo
9:20 am - 8:48 pm
LCY
-
SEA
19h 28m
2 stops
$930Virgin Atlantic
Mi, Aug 5 - Mi, Aug 26
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
$931KLM
Di, Mai 12 - Di, Mai 19
Delta Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
Delta Logo
8:25 am - 4:35 pm
LCY
-
SEA
16h 10m
1 stop
$932Delta
Di, Aug 18 - Mi, Sep 30
Virgin Atlantic Logo
1:50 pm - 6:30 pm
SEA
-
LCY
20h 40m
1 stop
Virgin Atlantic Logo
9:20 am - 8:48 pm
LCY
-
SEA
19h 28m
2 stops
$933Virgin Atlantic
Di, Aug 18 - Do, Aug 27
SWISS Logo
10:30 am - 12:35 pm
SEA
-
LCY
18h 05m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$934SWISS
Mo, Okt 5 - Do, Okt 15
SWISS Logo
2:52 pm - 5:25 pm
SEA
-
LCY
18h 33m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$936SWISS
Di, Sep 29 - Di, Okt 13

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SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Aug 25
SEA7:00 amSeattle/Tacoma Intl
27h 40m
2 stops
LCY6:40 pmLondon City
Aug 27
LCY9:15 amLondon City
22h 09m
2 stops
SEA11:24 pmSeattle/Tacoma Intl
$834
SWISS
Aug 24
SEA3:33 pmSeattle/Tacoma Intl
19h 07m
2 stops
LCY6:40 pmLondon City
Aug 26
LCY6:00 pmLondon City
32h 59m
2 stops
SEA6:59 pmSeattle/Tacoma Intl
$884
SWISS
Aug 24
SEA3:33 pmSeattle/Tacoma Intl
37h 02m
2 stops
LCY12:35 pmLondon City
Aug 27
LCY9:15 amLondon City
21h 27m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$916

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Aug 25
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Aug 27
LCY9:15 amLondon City
18h 48m
2 stops
SEA8:03 pmSeattle/Tacoma Intl
$899
Lufthansa
Oct 11
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 21
LCY9:15 amLondon City
21h 27m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$962
Lufthansa
Sep 20
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Sep 30
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$967

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 18, 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

Di 8/25

7:00 am-6:40 pm

2 stops27h 40m

London City

Do 8/27

9:15 am-11:24 pm

2 stops22h 09m

$834

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mo 8/24

3:33 pm-6:40 pm

2 stops19h 07m

London City

Mi 8/26

6:00 pm-6:59 pm

2 stops32h 59m

$884

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Di 8/25

2:10 pm-5:55 pm

1 stop19h 45m

London City

Do 8/27

9:15 am-8:03 pm

2 stops18h 48m

$899

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mo 8/24

3:33 pm-12:35 pm

2 stops37h 02m

London City

Do 8/27

9:15 am-10:42 pm

2 stops21h 27m

$916

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mi 8/5

5:45 pm-7:45 pm

1 stop18h 00m

London City

Mi 8/26

9:20 am-8:48 pm

2 stops19h 28m

$930
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Di 5/12

1:45 pm-9:30 am

1 stop11h 45m

London City

Di 5/19

9:20 am-4:30 pm

1 stop15h 10m

$931

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Di 8/18

1:50 pm-9:30 am

1 stop11h 40m

London City

Mi 9/30

8:25 am-4:35 pm

1 stop16h 10m

$932

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Di 8/18

1:50 pm-6:30 pm

1 stop20h 40m

London City

Do 8/27

9:20 am-8:48 pm

2 stops19h 28m

$933

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mo 10/5

10:30 am-12:35 pm

2 stops18h 05m

London City

Do 10/15

9:15 am-6:32 pm

2 stops17h 17m

$934

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Di 9/29

2:52 pm-5:25 pm

2 stops18h 33m

London City

Di 10/13

7:15 pm-6:32 pm

2 stops31h 17m

$936

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 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
1,751 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
Crawley
Wembley
Stansted
Croydon
Dartford
Brentwood
Cobham
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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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