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Cheap flights from London Southend Airport to Seattle from £332

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 Southend Airport to Seattle departing on 4/5. 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
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Find the cheapest flights from London Southend Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:10 - 22:53
SEN
-
SEA
20h 43m
3 stops
Multiple Airlines Logo
15:40 - 21:25
SEA
-
SEN
21h 45m
2 stops
£604Multiple Airlines
Thu, 9 Apr - Wed, 22 Apr
Multiple Airlines Logo
10:10 - 22:53
SEN
-
SEA
20h 43m
3 stops
Multiple Airlines Logo
15:40 - 21:25
SEA
-
SEN
21h 45m
2 stops
£724Multiple Airlines
Thu, 9 Apr - Wed, 22 Apr
Multiple Airlines Logo
07:25 - 22:53
SEN
-
SEA
23h 28m
3 stops
Multiple Airlines Logo
15:40 - 20:10
SEA
-
SEN
20h 30m
3 stops
£854Multiple Airlines
Sun, 19 Apr - Thu, 23 Apr
Multiple Airlines Logo
07:25 - 22:53
SEN
-
SEA
23h 28m
3 stops
Multiple Airlines Logo
15:40 - 20:10
SEA
-
SEN
20h 30m
3 stops
£884Multiple Airlines
Sun, 19 Apr - Thu, 23 Apr
Multiple Airlines Logo
07:15 - 17:15
SEN
-
SEA
42h 00m
3 stops
Multiple Airlines Logo
15:40 - 21:25
SEA
-
SEN
21h 45m
3 stops
£957Multiple Airlines
Wed, 8 Apr - Wed, 15 Apr
Multiple Airlines Logo
11:10 - 18:45
SEN
-
SEA
39h 35m
2 stops
Multiple Airlines Logo
17:40 - 19:35
SEA
-
SEN
17h 55m
1 stop
£1,300Multiple Airlines
Mon, 4 May - Sun, 10 May
Multiple Airlines Logo
06:30 - 10:38
SEN
-
SEA
36h 08m
2 stops
Multiple Airlines Logo
17:40 - 19:40
SEA
-
SEN
18h 00m
1 stop
£1,337Multiple Airlines
Tue, 12 May - Tue, 19 May
Multiple Airlines Logo
14:15 - 17:15
SEN
-
SEA
35h 00m
2 stops
Multiple Airlines Logo
13:45 - 16:40
SEA
-
SEN
18h 55m
1 stop
£1,584Multiple Airlines
Wed, 8 Apr - Wed, 15 Apr
Multiple Airlines Logo
11:20 - 11:15
SEN
-
SEA
31h 55m
1 stop
Multiple Airlines Logo
10:30 - 21:45
SEA
-
SEN
27h 15m
2 stops
£2,069Multiple Airlines
Fri, 8 May - Fri, 15 May
Multiple Airlines Logo
11:10 - 11:15
SEN
-
SEA
32h 05m
1 stop
Multiple Airlines Logo
17:40 - 19:35
SEA
-
SEN
17h 55m
1 stop
£2,415Multiple Airlines
Mon, 4 May - Sun, 10 May

momondo Fare Finder

 
Customise your flight search to find flights from London Southend 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 29 March 2026.
Use the filters below to find and compare flights from London Southend Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 9/4

10:10-22:53

3 stops20h 43m

Seattle/Tacoma Intl

Wed 22/4

15:40-21:25

2 stops21h 45m

£604

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 9/4

10:10-22:53

3 stops20h 43m

Seattle/Tacoma Intl

Wed 22/4

15:40-21:25

2 stops21h 45m

£724

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 19/4

07:25-22:53

3 stops23h 28m

Seattle/Tacoma Intl

Thu 23/4

15:40-20:10

3 stops20h 30m

£854

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 19/4

07:25-22:53

3 stops23h 28m

Seattle/Tacoma Intl

Thu 23/4

15:40-20:10

3 stops20h 30m

£884

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 8/4

07:15-17:15

3 stops42h 00m

Seattle/Tacoma Intl

Wed 15/4

15:40-21:25

3 stops21h 45m

£957

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 4/5

11:10-18:45

2 stops39h 35m

Seattle/Tacoma Intl

Sun 10/5

17:40-19:35

1 stop17h 55m

£1,300

LondonSeattle

SEN - SEA

SENSEA

London Southend

Tue 12/5

06:30-10:38

2 stops36h 08m

Seattle/Tacoma Intl

Tue 19/5

17:40-19:40

1 stop18h 00m

£1,337

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 8/4

14:15-17:15

2 stops35h 00m

Seattle/Tacoma Intl

Wed 15/4

13:45-16:40

1 stop18h 55m

£1,584

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 8/5

11:20-11:15

1 stop31h 55m

Seattle/Tacoma Intl

Fri 15/5

10:30-21:45

2 stops27h 15m

£2,069

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 4/5

11:10-11:15

1 stop32h 05m

Seattle/Tacoma Intl

Sun 10/5

17:40-19:35

1 stop17h 55m

£2,415

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

How to get the cheapest flight ticket from London Southend 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, Wednesday is the cheapest day to fly to Seattle from London Southend Airport. The lowest ticket price found for a Wednesday departure recently was £600. 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 £674.

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 Southend Airport to Seattle at midday for as low as £623. 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 £639.

When to book flights from London Southend Airport to Seattle

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

Cheap London Southend Airport to Seattle (SEN to SEA) flight deals and tips

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

Fastest flight time

17h 25m

Direct flights

None
The fastest flight from London Southend Airport to Seattle takes 17h 25m
There are no direct flights from London Southend Airport to Seattle. There are no popular flight routes from London Southend Airport to Seattle.
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  • How far is London Southend to Seattle/Tacoma Intl by plane?

    The straight-line distance from London Southend to Seattle/Tacoma Intl is 4798.7 mi. Typically, this will take 17h 25m by plane in normal conditions.

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

    Prices for flights from London Southend Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Southend 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 required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Seattle?

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

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Seattle for you.

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

Yes. momondo allows you to filter the results for London to Seattle flights to just show those with flexible booking policies.

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

Once you have performed a search for London to Seattle 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 London to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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