HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Southampton

$395+ Cheap flights from Seattle (SEA) to Southampton (SOU)

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Southampton with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Southampton (SOU). 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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$900
(Delta)

One-way from

$395
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$969
Provider with most accurate pricing for Seattle/Tacoma Intl-Southampton Eastleigh flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Southampton Eastleigh flights.
Search Deals
From Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
One-way flight from Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 51% potential increase in price ($1,963 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 27% potential price decrease ($408 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Seattle to Southampton

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

This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:55 pmSEA - SOU
1 stop19h 05mDelta
Tue 10/75:35 pmSOU - SEA
1 stop26h 15mDelta
Deal found 4/28$900
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/511:59 pmSEA - SOU
2 stops24h 06mAer Lingus
Wed 5/149:10 amSOU - SEA
1 stop15h 49mAer Lingus
Deal found 4/28$955
This Mytrip deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/107:05 amSEA - SOU
2 stops28h 25mMultiple Airlines
Tue 6/179:20 amSOU - SEA
3 stops43h 08mMultiple Airlines
Deal found 4/28$1,033
This KLM deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/148:30 amSEA - SOU
2 stops16h 15mKLM
Sat 8/306:05 pmSOU - SEA
1 stop29h 50mKLM
Deal found 4/28$1,043
This Virgin Atlantic deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:50 amSEA - SOU
2 stops16h 55mVirgin Atlantic
Fri 6/209:20 amSOU - SEA
2 stops21h 29mVirgin Atlantic
Deal found 4/29$1,340
This British Airways deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/151:30 pmSEA - SOU
2 stops18h 30mBritish Airways
Sun 9/289:10 amSOU - SEA
1 stop16h 40mBritish Airways
Deal found 4/29$1,976

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Southampton 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 2,558,603 searches. Data last updated April 29, 2025.
Use the filters below to find and compare flights from Seattle to Southampton that are best for you.

Fly from

Seattle

Fly to

Southampton

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 9/23

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Mon 10/6

9:20 am-11:50 am

1 stop34h 30m

$900

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/7

6:18 am-9:10 am

2 stops18h 52m

Southampton Eastleigh

Sun 9/14

9:10 am-5:50 pm

1 stop16h 40m

$1,004

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 6/10

7:05 am-7:30 pm

2 stops28h 25m

Southampton Eastleigh

Tue 6/17

9:20 am-8:28 pm

3 stops43h 08m

$1,033

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 8/14

8:30 am-8:45 am

2 stops16h 15m

Southampton Eastleigh

Sat 8/30

6:05 pm-3:55 pm

1 stop29h 50m

$1,043

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 6/13

7:50 am-8:45 am

2 stops16h 55m

Southampton Eastleigh

Fri 6/20

9:20 am-10:49 pm

2 stops21h 29m

$1,340

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 9/15

1:30 pm-4:00 pm

2 stops18h 30m

Southampton Eastleigh

Sun 9/28

9:10 am-5:50 pm

1 stop16h 40m

$1,976

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 10/18

1:50 pm-9:10 am

2 stops35h 20m

$395

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 8/24

5:40 pm-8:50 am

1 stop31h 10m

$547

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 10/18

7:35 pm-7:30 pm

1 stop15h 55m

$558

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 7/9

9:05 am-8:45 am

2 stops15h 40m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 11 results
1
2

Compare providers for flights from Seattle to Southampton

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Southampton in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Southampton flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Southampton flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Seattle-Southampton flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Southampton flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Southampton flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Southampton

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

Currently, November is the cheapest month in which you can book a flight from Seattle to Southampton (average of $787). Flying from Seattle to Southampton in June is currently the most expensive (average of $1,308). 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.

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

Find hourly flight availability from Seattle to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

When flying from Seattle to Southampton, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 10% versus a flight in the evening.

Rainfall in Southampton by month

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

In terms of precipitation, rainfall in Southampton ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Southampton when rainfall is around 1.0 in.

Temperature in Southampton by month

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

If weather is an important factor for your trip to Southampton, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Southampton

Get insights into the airlines that provide service to Southampton. 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 Southampton. Reviews last updated April 29, 2025.
Read reviews from past customers who have flown Delta, KLM and Virgin Atlantic from Seattle to Southampton. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,835 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Southampton. 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 Seattle to Southampton round-trip?

    Delta, at $900, was found to be the cheapest airline from Seattle to Southampton.Alternate airlines to your destination round-trip include Aer Lingus and KLM. Delta is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Southampton one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $547. Aer Lingus flights start at $558 while deals on KLM start at $671 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Southampton 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 Seattle to Southampton?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Southampton (average of $787). Flying from Seattle to Southampton in June is currently the most expensive (average of $1,308). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Heathrow flights
Seattle to Gatwick flights
Portland to Heathrow flights
Seattle to London City flights
Portland to Gatwick flights
Seattle to Edinburgh flights
Portland to London City flights
Seattle to Stansted flights
Seattle to Manchester flights
Portland to Edinburgh flights
Seattle to Luton flights
Seattle to Birmingham flights
Spokane to Heathrow flights
Portland to Manchester flights
Spokane to Edinburgh flights
Seattle to Liverpool flights
Spokane to Gatwick flights
Seattle to Bristol flights
Portland to Stansted flights
Seattle to Leeds flights
Seattle to Newcastle upon Tyne flights
Spokane to London City flights
Pasco to Heathrow flights
Portland to Luton flights
Seattle to Darlington flights
Seattle to Newquay flights
Bellingham to Heathrow flights
Portland to Bristol flights
Seattle to Southend flights
Spokane to Manchester flights
Seattle to Grimsby flights
Spokane to Southampton flights
Walla Walla to Heathrow flights
Portland to Leeds flights
Portland to Southend flights
Bellingham to Gatwick flights

Top 3 airlines flying from Seattle to Southampton

Discover the top 3 airlines that operate flights from Seattle to Southampton. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$738Average$1,151FlexibilityNo cancel feeOn-time75%
DeltaCheapest$794Average$865FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$944Average$1,495FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.