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.

£450 Cheap Flights from London Southend Airport to Seattle in 2025/26

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Find the cheapest flights from London Southend Airport to Seattle

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:40 - 17:00

SEN

SEA

18h 20m2 stops

14:35 - 14:50

SEA

SEN

16h 15m2 stops

£698Multiple Airlines

Fri, 6 Feb - Sun, 8 Feb

06:40 - 17:05

SEN

SEA

42h 25m2 stops

13:40 - 17:05

SEA

SEN

19h 25m1 stop

£1,206Multiple Airlines

Sat, 24 Jan - Sat, 31 Jan

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

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 6/2

06:40-17:00

2 stops18h 20m

Seattle/Tacoma Intl

Sun 8/2

14:35-14:50

2 stops16h 15m

£698

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 24/1

06:40-17:05

2 stops42h 25m

Seattle/Tacoma Intl

Sat 31/1

13:40-17:05

1 stop19h 25m

£1,206

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 23/2

07:20-17:00

2 stops17h 40m

£450

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 17/12

15:35-17:05

3 stops57h 30m

£559

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 17/12

15:35-17:05

3 stops57h 30m

£560

LondonSeattle

SEN - SEA

SENSEA

London Southend

Tue 16/12

13:00-17:05

3 stops36h 05m

£562

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 29/3

07:25-17:15

2 stops41h 50m

£597

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 1/2

07:10-17:00

2 stops17h 50m

£606

LondonSeattle

SEN - SEA

SENSEA

London Southend

Tue 16/12

20:20-17:05

2 stops28h 45m

£614

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 8/1

13:20-17:05

2 stops35h 45m

£656

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 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?

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 £588. 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 £667.

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 in the evening. momondo users have found flights departing from London Southend Airport to Seattle in the evening for as low as £527. 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 £622.

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

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.

Fife

Renton

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.