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 updated daily.

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

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

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$518 Cheap Flights from London Southend Airport to Seattle in 2026/27

Find the cheapest flights from London Southend Airport to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:20 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 40m2 stops Berlin Brandenburg Reykjavik Keflavik Intl

2:30 pm - 6:35 pmSEA Seattle/Tacoma Intl-SEN London Southend

20h 05m2 stops Calgary Paris Charles de Gaulle

$1,164Multiple Airlines

Mon, Nov 2 - Wed, Nov 18

7:15 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl

8:40 am - 6:45 pmSEA Seattle/Tacoma Intl-SEN London Southend

26h 05m3 stops Vancouver Intl Calgary Paris Charles de Gaulle

$1,325Multiple Airlines

Sat, Nov 14 - Sat, Nov 21

7:35 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl

2:35 pm - 5:45 pmSEA Seattle/Tacoma Intl-SEN London Southend

19h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol

$1,364Multiple Airlines

Fri, Dec 18 - Sun, Jan 3

7:35 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl

2:35 pm - 2:50 pmSEA Seattle/Tacoma Intl-SEN London Southend

16h 15m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol

$1,394Multiple Airlines

Fri, Nov 20 - Sun, Nov 29

7:35 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl

2:35 pm - 2:50 pmSEA Seattle/Tacoma Intl-SEN London Southend

16h 15m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol

$1,420Multiple Airlines

Fri, Nov 20 - Sun, Nov 29

7:20 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

17h 40m2 stops Berlin Brandenburg Reykjavik Keflavik Intl

3:25 pm - 6:35 pmSEA Seattle/Tacoma Intl-SEN London Southend

19h 10m1 stop Paris Charles de Gaulle

$1,427Multiple Airlines

Mon, Nov 2 - Wed, Nov 18

12:20 pm - 11:47 amSEN London Southend-SEA Seattle/Tacoma Intl

31h 27m1 stop Amsterdam Schiphol

2:35 pm - 4:40 pmSEA Seattle/Tacoma Intl-SEN London Southend

18h 05m1 stop Amsterdam Schiphol

$1,557Multiple Airlines

Mon, Nov 2 - Wed, Nov 18

3:55 pm - 7:45 pmSEN London Southend-SEA Seattle/Tacoma Intl

35h 50m2 stops Paris Charles de Gaulle Toronto Pearson Intl

3:25 pm - 2:35 pmSEA Seattle/Tacoma Intl-SEN London Southend

15h 10m1 stop Paris Charles de Gaulle

$1,613Multiple Airlines

Sun, Nov 15 - Sun, Nov 22

6:35 am - 5:00 pmSEN London Southend-SEA Seattle/Tacoma Intl

42h 25m2 stops Alicante Reykjavik Keflavik Intl

4:05 pm - 5:15 pmSEA Seattle/Tacoma Intl-SEN London Southend

17h 10m1 stop Paris Charles de Gaulle

$1,628Multiple Airlines

Thu, Nov 12 - Thu, Nov 19

12:55 pm - 4:55 pmSEN London Southend-SEA Seattle/Tacoma Intl

35h 00m2 stops Paris Charles de Gaulle Frankfurt am Main

6:50 pm - 5:15 pmSEA Seattle/Tacoma Intl-SEN London Southend

15h 25m2 stops Frankfurt am Main Paris Charles de Gaulle

$1,662Multiple Airlines

Mon, Oct 26 - Thu, Oct 29

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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 round-trip

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 11/2

7:20 am-5:00 pm

2 stops17h 40m

Seattle/Tacoma Intl

Wed 11/18

2:30 pm-6:35 pm

2 stops20h 05m

$1,164

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Sat 11/14

7:15 am-5:00 pm

2 stops17h 45m

Seattle/Tacoma Intl

Sat 11/21

8:40 am-6:45 pm

3 stops26h 05m

$1,325

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Fri 12/18

7:35 am-5:00 pm

2 stops17h 25m

Seattle/Tacoma Intl

Sun 1/3

2:35 pm-5:45 pm

2 stops19h 10m

$1,364

Quickest round-trip

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Fri 11/20

7:35 am-5:00 pm

2 stops17h 25m

Seattle/Tacoma Intl

Sun 11/29

2:35 pm-2:50 pm

2 stops16h 15m

$1,394

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Fri 11/20

7:35 am-5:00 pm

2 stops17h 25m

Seattle/Tacoma Intl

Sun 11/29

2:35 pm-2:50 pm

2 stops16h 15m

$1,420

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 11/2

7:20 am-5:00 pm

2 stops17h 40m

Seattle/Tacoma Intl

Wed 11/18

3:25 pm-6:35 pm

1 stop19h 10m

$1,427

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 11/2

12:20 pm-11:47 am

1 stop31h 27m

Seattle/Tacoma Intl

Wed 11/18

2:35 pm-4:40 pm

1 stop18h 05m

$1,557

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Sun 11/15

3:55 pm-7:45 pm

2 stops35h 50m

Seattle/Tacoma Intl

Sun 11/22

3:25 pm-2:35 pm

1 stop15h 10m

$1,613

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Thu 11/12

6:35 am-5:00 pm

2 stops42h 25m

Seattle/Tacoma Intl

Thu 11/19

4:05 pm-5:15 pm

1 stop17h 10m

$1,628

LondonSeattle

SEN London Southend - SEA Seattle/Tacoma Intl

SENSEA

London Southend

Mon 10/26

12:55 pm-4:55 pm

2 stops35h 00m

Seattle/Tacoma Intl

Thu 10/29

6:50 pm-5:15 pm

2 stops15h 25m

$1,662

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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?

On average, the least expensive day to fly to Seattle from London Southend Airport is on a Monday. momondo users have found tickets for Monday departures for as low as $788. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from London Southend Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $914.

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

Flying to Seattle from London Southend Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $806 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $896. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 round-trip 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

Best Price Found	$518
Fastest flight time	35h 00m
Direct flights	None

The best one-way flight to Seattle from London Southend Airport in the past 72 hours is $518. The best round-trip flight deal from London Southend Airport to Seattle found on momondo in the last 72 hours is $1,164.

The fastest flight from London Southend Airport to Seattle takes 35h 00m

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. 35h 00m is a normal flight duration for this route.
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 updated daily.
How old do you have to be to fly from London Southend Airport to Seattle/Tacoma Intl 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 London Southend Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Kent

Redmond

Olympia

Lakewood

Federal Way

Puyallup

Fife

Lynnwood

Tukwila

Cle Elum

Marysville

Lacey

Centralia

Kirkland

Shoreline

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?

All flight searches from London to Seattle on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Seattle.

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.