Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Southend Airport to Seattle from £396

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 5/10. 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

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 - 20:40SEN  London Southend-SEA Seattle/Tacoma Intl
18h 30m2 stops Paris Charles de Gaulle Reykjavik Keflavik Intl
Multiple Airlines Logo
14:35 - 14:35SEA  Seattle/Tacoma Intl-SEN London Southend
16h 00m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
£762Multiple Airlines
Thu, 22 Oct - Sun, 1 Nov
Multiple Airlines Logo
08:25 - 09:40SEN  London Southend-SEA Seattle/Tacoma Intl
33h 15m2 stops Barcelona-El Prat Calgary
Multiple Airlines Logo
14:35 - 22:20SEA  Seattle/Tacoma Intl-SEN London Southend
23h 45m2 stops Reykjavik Keflavik Intl Barcelona-El Prat
£829Multiple Airlines
Wed, 21 Oct - Wed, 4 Nov
Multiple Airlines Logo
08:25 - 09:40SEN  London Southend-SEA Seattle/Tacoma Intl
33h 15m2 stops Barcelona-El Prat Calgary
Multiple Airlines Logo
07:45 - 22:20SEA  Seattle/Tacoma Intl-SEN London Southend
30h 35m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat
£844Multiple Airlines
Wed, 21 Oct - Wed, 4 Nov
Multiple Airlines Logo
13:55 - 17:10SEN  London Southend-SEA Seattle/Tacoma Intl
35h 15m2 stops Amsterdam Schiphol Dublin
Multiple Airlines Logo
19:00 - 19:40SEA  Seattle/Tacoma Intl-SEN London Southend
16h 40m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
£848Multiple Airlines
Thu, 8 Oct - Tue, 20 Oct
Multiple Airlines Logo
06:50 - 17:00SEN  London Southend-SEA Seattle/Tacoma Intl
42h 10m3 stops Malaga Stockholm Arlanda Reykjavik Keflavik Intl
Multiple Airlines Logo
14:35 - 18:45SEA  Seattle/Tacoma Intl-SEN London Southend
20h 10m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
£857Multiple Airlines
Sat, 19 Dec - Sat, 2 Jan
Multiple Airlines Logo
11:35 - 16:00SEN  London Southend-SEA Seattle/Tacoma Intl
36h 25m2 stops Berlin Brandenburg Helsinki-Vantaa
Multiple Airlines Logo
13:50 - 19:35SEA  Seattle/Tacoma Intl-SEN London Southend
21h 45m1 stop Amsterdam Schiphol
£895Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep
Multiple Airlines Logo
13:55 - 17:10SEN  London Southend-SEA Seattle/Tacoma Intl
35h 15m2 stops Amsterdam Schiphol Dublin
Multiple Airlines Logo
05:40 - 19:40SEA  Seattle/Tacoma Intl-SEN London Southend
30h 00m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Amsterdam Schiphol
£918Multiple Airlines
Thu, 8 Oct - Tue, 20 Oct
Multiple Airlines Logo
07:00 - 16:59SEN  London Southend-SEA Seattle/Tacoma Intl
17h 59m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
17:45 - 19:35SEA  Seattle/Tacoma Intl-SEN London Southend
17h 50m1 stop Amsterdam Schiphol
£2,184Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 9 August 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 London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Thu 22/10

10:10-20:40

2 stops18h 30m

Seattle/Tacoma Intl

Sun 1/11

14:35-14:35

2 stops16h 00m

£762

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Wed 21/10

08:25-09:40

2 stops33h 15m

Seattle/Tacoma Intl

Wed 4/11

14:35-22:20

2 stops23h 45m

£829

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Wed 21/10

08:25-09:40

2 stops33h 15m

Seattle/Tacoma Intl

Wed 4/11

07:45-22:20

3 stops30h 35m

£844

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Thu 8/10

13:55-17:10

2 stops35h 15m

Seattle/Tacoma Intl

Tue 20/10

19:00-19:40

2 stops16h 40m

£848

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Sat 19/12

06:50-17:00

3 stops42h 10m

Seattle/Tacoma Intl

Sat 2/1

14:35-18:45

2 stops20h 10m

£857

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Sun 20/9

11:35-16:00

2 stops36h 25m

Seattle/Tacoma Intl

Sun 27/9

13:50-19:35

1 stop21h 45m

£895

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Thu 8/10

13:55-17:10

2 stops35h 15m

Seattle/Tacoma Intl

Tue 20/10

05:40-19:40

3 stops30h 00m

£918

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Sun 20/9

07:00-16:59

1 stop17h 59m

Seattle/Tacoma Intl

Sun 27/9

17:45-19:35

1 stop17h 50m

£2,184
Cheapest one-way

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 5/10

07:50-17:10

3 stops41h 20m

£396

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 5/10

07:50-17:10

3 stops41h 20m

£397

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 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, Thursday is the cheapest day to fly to Seattle from London Southend Airport. The lowest ticket price found for a Thursday departure recently was £594. 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 £670.

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 £589. 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 morning are often more expensive, with an average ticket price of £633.

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

18h 20m

Direct flights

None
The fastest flight from London Southend Airport to Seattle takes 18h 20m
There are no direct flights from London Southend Airport to Seattle. There are no popular flight routes from London Southend Airport to Seattle.
Search flight deals

Frequently asked questions about flying from London Southend Airport to Seattle

  • 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 18h 20m 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
Westport
Kirkland
Ashford
Tacoma
SeaTac
Tukwila
Fife

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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/9
Tue 15/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States