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Cheap flights from Seattle to London from $341

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 10/13. 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

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
3:30 pm - 5:05 pm
SEA
-
LCY
17h 35m
2 stops
SWISS Logo
9:15 am - 10:29 pm
LCY
-
SEA
21h 14m
2 stops
$787SWISS
Tue, Dec 8 - Thu, Dec 10
SWISS Logo
7:00 am - 12:35 pm
SEA
-
LCY
21h 35m
2 stops
SWISS Logo
9:15 am - 8:43 pm
LCY
-
SEA
19h 28m
2 stops
$836SWISS
Wed, Aug 26 - Fri, Aug 28
Lufthansa Logo
2:00 pm - 5:40 pm
SEA
-
LCY
19h 40m
1 stop
Lufthansa Logo
9:50 am - 10:29 pm
LCY
-
SEA
44h 39m
2 stops
$848Lufthansa
Sun, Dec 13 - Tue, Dec 15
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
$873Lufthansa
Wed, Aug 26 - Fri, Aug 28
Lufthansa Logo
2:10 pm - 5:55 pm
SEA
-
LCY
19h 45m
1 stop
Lufthansa Logo
9:15 am - 7:15 pm
LCY
-
SEA
42h 00m
2 stops
$876Lufthansa
Sun, Sep 6 - Tue, Sep 8
Delta Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
Delta Logo
9:20 am - 4:35 pm
LCY
-
SEA
15h 15m
1 stop
$878Delta
Sun, Oct 4 - Wed, Oct 21
Delta Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
Delta Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$879Delta
Mon, Oct 5 - Thu, Oct 15
Virgin Atlantic Logo
1:45 pm - 5:20 pm
SEA
-
LCY
19h 35m
1 stop
Virgin Atlantic Logo
8:25 am - 8:50 pm
LCY
-
SEA
20h 25m
2 stops
$880Virgin Atlantic
Tue, Oct 13 - Wed, Oct 21
Virgin Atlantic Logo
1:45 pm - 5:20 pm
SEA
-
LCY
19h 35m
1 stop
Virgin Atlantic Logo
8:05 pm - 11:47 am
LCY
-
SEA
23h 42m
1 stop
$881Virgin Atlantic
Wed, Oct 21 - Wed, Nov 4
Virgin Atlantic Logo
5:45 pm - 7:45 pm
SEA
-
LCY
18h 00m
1 stop
Virgin Atlantic Logo
9:20 am - 8:50 pm
LCY
-
SEA
19h 30m
2 stops
$882Virgin Atlantic
Sun, Oct 4 - Thu, Oct 22

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Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Oct 4
SEA1:45 pmSeattle/Tacoma Intl
11h 45m
1 stop
LCY9:30 amLondon City
Oct 21
LCY9:20 amLondon City
15h 15m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$878
Delta
Oct 5
SEA1:45 pmSeattle/Tacoma Intl
11h 45m
1 stop
LCY9:30 amLondon City
Oct 15
LCY10:00 amLondon City
14h 35m
1 stop
SEA4:35 pmSeattle/Tacoma Intl
$879
Delta
Aug 3
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 19
LCY10:00 amLondon City
14h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$930

SWISS flights from Seattle to London City Airport

Our best SWISS deals on Seattle to London City Airport flight tickets
SWISS
Aug 26
SEA7:00 amSeattle/Tacoma Intl
21h 35m
2 stops
LCY12:35 pmLondon City
Aug 28
LCY9:15 amLondon City
19h 28m
2 stops
SEA8:43 pmSeattle/Tacoma Intl
$836
SWISS
Sep 16
SEA1:16 pmSeattle/Tacoma Intl
39h 19m
2 stops
LCY12:35 pmLondon City
Sep 19
LCY9:00 amLondon City
42h 15m
2 stops
SEA7:15 pmSeattle/Tacoma Intl
$887
SWISS
Aug 19
SEA7:00 amSeattle/Tacoma Intl
26h 25m
2 stops
LCY5:25 pmLondon City
Aug 26
LCY9:15 amLondon City
19h 28m
2 stops
SEA8:43 pmSeattle/Tacoma Intl
$891

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 July 9, 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 12/8

3:30 pm-5:05 pm

2 stops17h 35m

London City

Thu 12/10

9:15 am-10:29 pm

2 stops21h 14m

$787

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/26

7:00 am-12:35 pm

2 stops21h 35m

London City

Fri 8/28

9:15 am-8:43 pm

2 stops19h 28m

$836

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 12/13

2:00 pm-5:40 pm

1 stop19h 40m

London City

Tue 12/15

9:50 am-10:29 pm

2 stops44h 39m

$848

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 8/26

2:10 pm-5:55 pm

1 stop19h 45m

London City

Fri 8/28

9:15 am-4:59 pm

2 stops15h 44m

$873

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 9/6

2:10 pm-5:55 pm

1 stop19h 45m

London City

Tue 9/8

9:15 am-7:15 pm

2 stops42h 00m

$876

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/4

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 10/21

9:20 am-4:35 pm

1 stop15h 15m

$878
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 10/5

1:45 pm-9:30 am

1 stop11h 45m

London City

Thu 10/15

10:00 am-4:35 pm

1 stop14h 35m

$879

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/13

1:45 pm-5:20 pm

1 stop19h 35m

London City

Wed 10/21

8:25 am-8:50 pm

2 stops20h 25m

$880

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 10/21

1:45 pm-5:20 pm

1 stop19h 35m

London City

Wed 11/4

8:05 pm-11:47 am

1 stop23h 42m

$881

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/4

5:45 pm-7:45 pm

1 stop18h 00m

London City

Thu 10/22

9:20 am-8:50 pm

2 stops19h 30m

$882

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 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

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 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 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.

Traveling to a place near London?

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

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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