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.

$564 Cheap Flights from London Southend Airport to Seattle in 2026

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Find the cheapest flights from London Southend Airport to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:15 pm - 8:40 pm

SEN

SEA

16h 25m

2 stops

3:40 pm - 4:40 pm

SEA

SEN

17h 00m

2 stops

$1,337Multiple Airlines

Wed, Jun 24 - Wed, Jul 1

8:10 am - 5:30 pm

SEN

SEA

17h 20m

1 stop

1:30 pm - 10:45 am

SEA

SEN

13h 15m

1 stop

$1,419Multiple Airlines

Fri, Jun 12 - Fri, Jun 19

11:10 am - 8:40 pm

SEN

SEA

17h 30m

2 stops

3:40 pm - 7:20 pm

SEA

SEN

19h 40m

2 stops

$1,501Multiple Airlines

Mon, Aug 10 - Sat, Aug 29

8:10 am - 9:40 am

SEN

SEA

33h 30m

2 stops

5:45 pm - 7:35 pm

SEA

SEN

17h 50m

1 stop

$1,507Multiple Airlines

Fri, Jun 5 - Thu, Jun 11

7:50 pm - 11:37 am

SEN

SEA

23h 47m

2 stops

1:30 pm - 10:30 am

SEA

SEN

13h 00m

1 stop

$1,546Multiple Airlines

Sun, Aug 2 - Sun, Aug 16

11:10 am - 8:40 pm

SEN

SEA

17h 30m

2 stops

1:30 pm - 4:40 pm

SEA

SEN

19h 10m

1 stop

$1,588Multiple Airlines

Mon, Jun 8 - Wed, Jun 24

11:10 am - 8:40 pm

SEN

SEA

17h 30m

2 stops

1:30 pm - 4:40 pm

SEA

SEN

19h 10m

1 stop

$1,632Multiple Airlines

Mon, Jun 8 - Wed, Jun 24

7:55 am - 9:40 am

SEN

SEA

33h 45m

2 stops

1:30 pm - 10:25 am

SEA

SEN

12h 55m

1 stop

$1,646Multiple Airlines

Sat, Jun 6 - Sat, Jun 13

4:50 pm - 9:40 am

SEN

SEA

48h 50m

2 stops

1:30 pm - 10:25 am

SEA

SEN

12h 55m

1 stop

$1,690Multiple Airlines

Sat, Jun 6 - Sat, Jun 13

4:50 pm - 3:35 pm

SEN

SEA

30h 45m

1 stop

1:30 pm - 10:25 am

SEA

SEN

12h 55m

1 stop

$2,486Multiple Airlines

Sat, Jun 6 - Sat, Jun 13

momondo Fare Finder

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 - SEA

SENSEA

London Southend

Wed 6/24

12:15 pm-8:40 pm

2 stops16h 25m

Seattle/Tacoma Intl

Wed 7/1

3:40 pm-4:40 pm

2 stops17h 00m

$1,337

Quickest round-trip

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 6/12

8:10 am-5:30 pm

1 stop17h 20m

Seattle/Tacoma Intl

Fri 6/19

1:30 pm-10:45 am

1 stop13h 15m

$1,419

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 8/10

11:10 am-8:40 pm

2 stops17h 30m

Seattle/Tacoma Intl

Sat 8/29

3:40 pm-7:20 pm

2 stops19h 40m

$1,501

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 6/5

8:10 am-9:40 am

2 stops33h 30m

Seattle/Tacoma Intl

Thu 6/11

5:45 pm-7:35 pm

1 stop17h 50m

$1,507

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 8/2

7:50 pm-11:37 am

2 stops23h 47m

Seattle/Tacoma Intl

Sun 8/16

1:30 pm-10:30 am

1 stop13h 00m

$1,546

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 6/8

11:10 am-8:40 pm

2 stops17h 30m

Seattle/Tacoma Intl

Wed 6/24

1:30 pm-4:40 pm

1 stop19h 10m

$1,588

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 6/8

11:10 am-8:40 pm

2 stops17h 30m

Seattle/Tacoma Intl

Wed 6/24

1:30 pm-4:40 pm

1 stop19h 10m

$1,632

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 6/6

7:55 am-9:40 am

2 stops33h 45m

Seattle/Tacoma Intl

Sat 6/13

1:30 pm-10:25 am

1 stop12h 55m

$1,646

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 6/6

4:50 pm-9:40 am

2 stops48h 50m

Seattle/Tacoma Intl

Sat 6/13

1:30 pm-10:25 am

1 stop12h 55m

$1,690

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 6/6

4:50 pm-3:35 pm

1 stop30h 45m

Seattle/Tacoma Intl

Sat 6/13

1:30 pm-10:25 am

1 stop12h 55m

$2,486

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 $812. 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 $947.

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 $854 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $904. 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

Fastest flight time	17h 20m
Direct flights	None

The fastest flight from London Southend Airport to Seattle takes 17h 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. 17h 20m 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

Olympia

Lynnwood

Redmond

Kent

Tukwila

Puyallup

Marysville

Lakewood

Cle Elum

Federal Way

Centralia

Fife

Westport

Shoreline

Tumwater

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.