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Cheap flights from London City Airport to Seattle 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 London City Airport to Seattle departing on 18/10. 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 London City Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
10:00 - 16:24
LCY
-
SEA
14h 24m
1 stop
Delta Logo
07:30 - 08:50
SEA
-
LCY
17h 20m
2 stops
£483Delta
Sat, 27 Jun - Fri, 3 Jul
Virgin Atlantic Logo
09:20 - 11:33
LCY
-
SEA
34h 13m
1 stop
Virgin Atlantic Logo
17:40 - 08:50
SEA
-
LCY
31h 10m
1 stop
£485Virgin Atlantic
Sat, 4 Jul - Mon, 13 Jul
Virgin Atlantic Logo
07:45 - 16:27
LCY
-
SEA
16h 42m
1 stop
Virgin Atlantic Logo
17:45 - 07:15
SEA
-
LCY
29h 30m
1 stop
£487Virgin Atlantic
Fri, 21 Aug - Mon, 24 Aug
SWISS Logo
09:15 - 18:32
LCY
-
SEA
17h 17m
2 stops
SWISS Logo
07:00 - 12:35
SEA
-
LCY
21h 35m
2 stops
£490SWISS
Tue, 15 Sep - Tue, 22 Sep
SWISS Logo
09:15 - 20:43
LCY
-
SEA
19h 28m
2 stops
SWISS Logo
15:30 - 17:25
SEA
-
LCY
17h 55m
2 stops
£496SWISS
Tue, 1 Sep - Tue, 22 Sep
Virgin Atlantic Logo
07:45 - 18:36
LCY
-
SEA
18h 51m
2 stops
Virgin Atlantic Logo
17:40 - 17:20
SEA
-
LCY
15h 40m
1 stop
£501Virgin Atlantic
Sat, 4 Jul - Mon, 13 Jul
Multiple Airlines Logo
10:00 - 16:27
LCY
-
SEA
14h 27m
1 stop
Multiple Airlines Logo
17:45 - 18:30
SEA
-
LCY
16h 45m
1 stop
£506Multiple Airlines
Thu, 27 Aug - Mon, 31 Aug
Virgin Atlantic Logo
10:00 - 16:20
LCY
-
SEA
14h 20m
1 stop
Virgin Atlantic Logo
17:40 - 07:15
SEA
-
LCY
29h 35m
1 stop
£507Virgin Atlantic
Sat, 4 Jul - Mon, 13 Jul
Virgin Atlantic Logo
10:00 - 16:20
LCY
-
SEA
14h 20m
1 stop
Virgin Atlantic Logo
17:40 - 07:15
SEA
-
LCY
29h 35m
1 stop
£510Virgin Atlantic
Sat, 4 Jul - Mon, 13 Jul
Delta Logo
08:25 - 16:24
LCY
-
SEA
15h 59m
1 stop
Delta Logo
13:45 - 09:30
SEA
-
LCY
11h 45m
1 stop
£515Delta
Mon, 22 Jun - Fri, 3 Jul

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Lufthansa flights from London City Airport to Seattle

Our best Lufthansa deals on London City Airport to Seattle flight tickets
Lufthansa
8 Jul
LCY09:15London City
17h 17m
2 stops
SEA18:32Seattle/Tacoma Intl
21 Jul
SEA14:10Seattle/Tacoma Intl
19h 45m
1 stop
LCY17:55London City
£545
Lufthansa
1 Jul
LCY09:15London City
17h 17m
2 stops
SEA18:32Seattle/Tacoma Intl
8 Jul
SEA14:10Seattle/Tacoma Intl
19h 45m
1 stop
LCY17:55London City
£601
Lufthansa
1 Jul
LCY09:15London City
15h 44m
2 stops
SEA16:59Seattle/Tacoma Intl
8 Jul
SEA14:10Seattle/Tacoma Intl
19h 45m
1 stop
LCY17:55London City
£629

SWISS flights from London City Airport to Seattle

Our best SWISS deals on London City Airport to Seattle flight tickets
SWISS
15 Sept
LCY09:15London City
17h 17m
2 stops
SEA18:32Seattle/Tacoma Intl
22 Sept
SEA07:00Seattle/Tacoma Intl
21h 35m
2 stops
LCY12:35London City
£490
SWISS
1 Sept
LCY09:15London City
19h 28m
2 stops
SEA20:43Seattle/Tacoma Intl
22 Sept
SEA15:30Seattle/Tacoma Intl
17h 55m
2 stops
LCY17:25London City
£496
SWISS
8 Jul
LCY09:15London City
17h 17m
2 stops
SEA18:32Seattle/Tacoma Intl
21 Jul
SEA10:45Seattle/Tacoma Intl
22h 40m
2 stops
LCY17:25London City
£540

momondo Fare Finder

 
Customise your flight search to find flights from London City Airport to Seattle 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 279,928 searches. Data last updated 18 June 2026.
Use the filters below to find and compare flights from London City Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LCY - SEA

LCYSEA

London City

Sat 27/6

10:00-16:24

1 stop14h 24m

Seattle/Tacoma Intl

Fri 3/7

07:30-08:50

2 stops17h 20m

£483

LondonSeattle

LCY - SEA

LCYSEA

London City

Sat 4/7

09:20-11:33

1 stop34h 13m

Seattle/Tacoma Intl

Mon 13/7

17:40-08:50

1 stop31h 10m

£485

LondonSeattle

LCY - SEA

LCYSEA

London City

Fri 21/8

07:45-16:27

1 stop16h 42m

Seattle/Tacoma Intl

Mon 24/8

17:45-07:15

1 stop29h 30m

£487

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 15/9

09:15-18:32

2 stops17h 17m

Seattle/Tacoma Intl

Tue 22/9

07:00-12:35

2 stops21h 35m

£490

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 1/9

09:15-20:43

2 stops19h 28m

Seattle/Tacoma Intl

Tue 22/9

15:30-17:25

2 stops17h 55m

£496

LondonSeattle

LCY - SEA

LCYSEA

London City

Sat 4/7

07:45-18:36

2 stops18h 51m

Seattle/Tacoma Intl

Mon 13/7

17:40-17:20

1 stop15h 40m

£501

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 27/8

10:00-16:27

1 stop14h 27m

Seattle/Tacoma Intl

Mon 31/8

17:45-18:30

1 stop16h 45m

£506

LondonSeattle

LCY - SEA

LCYSEA

London City

Sat 4/7

10:00-16:20

1 stop14h 20m

Seattle/Tacoma Intl

Mon 13/7

17:40-07:15

1 stop29h 35m

£507

LondonSeattle

LCY - SEA

LCYSEA

London City

Sat 4/7

10:00-16:20

1 stop14h 20m

Seattle/Tacoma Intl

Mon 13/7

17:40-07:15

1 stop29h 35m

£510
Fastest return journey

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 22/6

08:25-16:24

1 stop15h 59m

Seattle/Tacoma Intl

Fri 3/7

13:45-09:30

1 stop11h 45m

£515

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Seattle from

How to get the cheapest flight ticket from London City Airport to Seattle

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 day to depart on your flight to Seattle?

According to our data, Thursday is the cheapest day to fly to Seattle from London City Airport. The lowest ticket price found for a Thursday departure recently was £615. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £695.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from London City Airport to Seattle at midday for as low as £616. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £651.

When to book flights from London City Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from London City Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London City Airport to Seattle (LCY to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London City Airport to Seattle

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from London City Airport to Seattle takes 12h 25m
There are no direct flights from London City Airport to Seattle. There are no popular flight routes from London City Airport to Seattle.
Search flight deals

Frequently asked questions about flying from London City Airport to Seattle

  • How far is London City to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 4785.6 mi away from London City. 12h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from London City Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from London City Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How old do you have to be to fly from London City Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London City Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kirkland
Fife
Ashford
Tacoma
SeaTac
Tukwila

Why use momondo?

Why should I use momondo to find a flight deal from London to Seattle?

It is quick and easy to find London to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from London to Seattle with flexible booking policies on momondo?

Flights from London to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from London.

I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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