In terms of precipitation, rainfall in London Southend Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Southend Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Southend Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

How far in advance should I book a flight from Seattle to London Southend Airport?

To save on the cost of your flight from Seattle to London Southend Airport, book at least 51 days before your planned departure. Booking around this time can save you about 44% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $805 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $981.

What is the cheapest month to fly from Seattle to London Southend Airport?

The best pricing can be found in the month of October. Prices to London Southend Airport from Seattle average $768. You can even find prices in October for less than $768, as users have found deals to London Southend Airport from as low as $539. The month of June appears to be one of the more expensive times to travel to London Southend Airport from Seattle. Flying in the targeted month can save you up to 30%.

What is the cheapest time of day to fly from SEA to SEN?

When flying from Seattle to London Southend Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Seattle to London Southend?

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London Southend. On average, Seattle/Tacoma Intl has 0 outbound flights to London Southend per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

Can I find deals for flights from Seattle to Southend that include hotel bookings?

Yes. In addition to deals on Seattle to Southend flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Seattle to Southend?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Southend.

Can I find deals for business class flights from Seattle to Southend?

Yes. Cheapflights offers flight deals from Seattle to Southend by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$274+ Flights from Seattle to London Southend Airport

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Cheap flight deals from Seattle to Southend

Round-trip from	$994 (Mytrip)
One-way from	$274 (Kiwi.com)
Popular in	June
Cheapest in	October
Average price	$935

From Seattle/Tacoma Intl to London Southend

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One-way flight from Seattle/Tacoma Intl to London Southend

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Highest demand for flights based on searches. 15% potential increase in price ($136 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Cheapest flights from Seattle to Southend
Explore the most affordable flight options available from Seattle to Southend. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Wed 11/53:10 pmSEA - SEN

2 stops21h 50mMultiple Airlines

Mon 11/107:15 amSEN - SEA

3 stops34h 16mMultiple Airlines

Deal found 7/28

$876

Best flights from Seattle to Southend
Discover carefully curated flight deals from Seattle to Southend that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Thu 9/43:45 pmSEA - SEN

2 stops16h 00mMultiple Airlines

Mon 9/811:05 amSEN - SEA

2 stops17h 35mMultiple Airlines

Deal found 7/28

$994

Last-minute flights from Seattle to Southend
Discover last-minute flight deals from Seattle to Southend. Data last updated July 29, 2025 and is based on user searches.

Sat 8/163:45 pmSEA - SEN

2 stops15h 35mMultiple Airlines

Fri 8/2911:05 amSEN - SEA

2 stops17h 35mMultiple Airlines

Deal found 7/28

$1,135

One-way flights from Seattle to Southend
Search for one-way flight options from Seattle to Southend. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Wed 10/158:50 amSEA - SEN

3 stops28h 00mMultiple Airlines

Deal found 7/29

$274

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 9/4

3:45 pm-3:45 pm

2 stops16h 00m

London Southend

Mon 9/8

11:05 am-8:40 pm

2 stops17h 35m

$994

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 10/15

8:50 am-8:50 pm

3 stops28h 00m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Seattle to Southend

Have a flexible travel schedule? Discover the best time to fly to Southend from Seattle with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Seattle to London Southend?
Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London Southend. On average, Seattle/Tacoma Intl has 0 outbound flights to London Southend per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.
Can I find deals for flights from Seattle to Southend that include hotel bookings?
Yes. In addition to deals on Seattle to Southend flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Southend?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Southend.
Can I find deals for business class flights from Seattle to Southend?
Yes. Cheapflights offers flight deals from Seattle to Southend by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$274+ Cheap flights from Seattle (SEA) to Southend (SEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Southend with Cheapflights

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Cheap flight deals from Seattle to Southend

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Find flight deals from Seattle to Southend

Cheapest flights from Seattle to SouthendExplore the most affordable flight options available from Seattle to Southend. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Seattle to Southend. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to London Southend Airport that are best for you.

Best time to book a flight from Seattle to Southend

Have a flexible travel schedule? Discover the best time to fly to Southend from Seattle with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Southend. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Seattle to London Southend?

Can I find deals for flights from Seattle to Southend that include hotel bookings?

How can I find direct flights from Seattle to Southend?

Can I find deals for business class flights from Seattle to Southend?

Traveling to a place near London Southend Airport?

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Cheapest flights from Seattle to Southend
Explore the most affordable flight options available from Seattle to Southend. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.