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.

$542 Cheap Flights from London Southend Airport to Seattle (SEN-SEA) in 2025

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Find the cheapest flights from London Southend Airport to Seattle (SEN-SEA)

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SEN-SEA

4807 mimulti-stop

SEA-SEN

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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

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 12/10

7:10 am-7:53 pm

2 stops20h 43m

$542

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 10/6

11:05 am-10:22 am

2 stops31h 17m

$553

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 12/17

7:10 am-2:20 pm

2 stops39h 10m

$577

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 12/17

7:10 am-7:07 am

3 stops31h 57m

$587

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 10/9

5:40 pm-7:21 pm

2 stops33h 41m

$631

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 12/18

6:05 pm-7:07 am

3 stops45h 02m

$641

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 12/18

6:05 pm-2:38 pm

2 stops52h 33m

$685

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 10/31

1:50 pm-12:40 pm

3 stops53h 50m

$721

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 9/8

11:05 am-10:35 am

2 stops31h 30m

$736

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 9/8

11:05 am-10:35 am

2 stops31h 30m

$748

Flights are sorted by cheapest round-trip flights first.

Sorted 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 Wednesday. momondo users have found tickets for Wednesday 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 $999.

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

Flying to Seattle from London Southend Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $844 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $859. Departure times in the evening 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

Direct flights	None

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.
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.

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Cle Elum

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Fife

Redmond

Westport

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.