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Cheap flights from Southampton to Seattle from £354

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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
26 2月 — 5 3月1
1 adult

Cheap flight deals from Southampton to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 2月 2025.

Round-trip from

£819

One-way from

£354

Popular in

August

Cheapest in

January

Average price

£524
KLM
  • KLM
  • 6/4-13/4
  • 3 total stops
  • 45h 25m total
  • Southampton to Seattle
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24/3
  • 24/3
  • 3 total stops
  • 51h 18m total
  • Southampton to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£87 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
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Average for round-trip flights in February 2025
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Find flight deals from Southampton to Seattle

Cheapest flights from Southampton to Seattle
Explore the most affordable flight options available from Southampton to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 2月 2025.

週日 6/418:25SOU - SEA
1 stop29h 35mKLM
週日 13/417:10SEA - SOU
2 stops15h 50mKLM
Deal found 20/2£819
週日 6/409:20SOU - SEA
2 stops19h 15mDelta
週日 13/412:00SEA - SOU
2 stops21h 00mDelta
Deal found 20/2£965
週日 6/409:10SOU - SEA
3 stops41h 59mMultiple Airlines
週日 13/408:30SEA - SOU
3 stops26h 25mMultiple Airlines
Deal found 20/2£1,032

Find flights from Southampton to Seattle within your budget

Customise your flight search to find flights from Southampton to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 2月 2025.

Fly from

Southampton

Fly to

Seattle

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

週日 6/4

18:25-16:00

1 stop29h 35m

Seattle/Tacoma Intl

週日 13/4

17:10-17:00

2 stops15h 50m

£819

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

週日 6/4

09:20-20:35

2 stops19h 15m

Seattle/Tacoma Intl

週日 13/4

12:00-17:00

2 stops21h 00m

£965

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

週日 6/4

09:10-19:09

3 stops41h 59m

Seattle/Tacoma Intl

週日 13/4

08:30-18:55

3 stops26h 25m

£1,032

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

週一 24/3

12:25-08:43

3 stops51h 18m

£354

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

週一 24/3

09:25-19:15

1 stop16h 50m

£574

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Best time to book a flight from Southampton to Seattle

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

Travel insights for flights from Southampton to Seattle

Get recent, data-driven insights about flights from Southampton to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Southampton to Seattle?

Currently, January is the cheapest month in which you can book a flight from Southampton to Seattle (average of £622). Flying from Southampton to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 21 2月 2025.
Delta
8.0
Very Good
8,213 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,213 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,331 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.0
Good
1,070 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

  • What are the cheapest airlines flying from Southampton to Seattle round-trip?

    Currently priced at £819, KLM will fly you from Southampton to Seattle and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Delta for as low as £965.

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

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

  • How can I find direct flights from Southampton to Seattle?

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

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

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

  • What is the cheapest month to book a flight from Southampton to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Southampton to Seattle (average of £622). Flying from Southampton to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Southampton?

Book flights to Southampton if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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Alternative routes for Southampton to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Southampton to Seattle?

Deals for Southampton to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Southampton to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Southampton to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Southampton to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Southampton to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Southampton to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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