HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$383+ Cheap flights from Basel EuroAirport Swiss (BSL) to Seattle (SEA)

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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — SEA
Jan 4 — Jan 111
Sat 1/4
Sat 1/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Basel to Seattle 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 Basel to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Basel (BSL) 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 December 30, 2024.

Round-trip from

$459
(Flysmarter)

One-way from

$383
(Kiwi.com)
From Basel EuroAirport Swiss to Seattle/Tacoma Intl
Search Deals
One-way flight from Basel EuroAirport Swiss to Seattle/Tacoma Intl
Search Deals

Find flight deals from Basel to Seattle

Best flights from Basel to Seattle
Discover carefully curated flight deals from Basel to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2024.

This Flysmarter deal was found by Cheapflights users on 12/30. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/76:40 amBSL - SEA
1 stop13h 40mBritish Airways
Sat 3/86:50 pmSEA - BSL
1 stop14h 10mBritish Airways
Deal found 12/30$459
This American Airlines deal was found by Cheapflights users on 12/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/46:55 amBSL - SEA
1 stop13h 25mAmerican Airlines
Sat 3/86:50 pmSEA - BSL
1 stop14h 10mAmerican Airlines
Deal found 12/30$471
This Kissandfly.com deal was found by Cheapflights users on 12/29. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/138:00 pmBSL - SEA
1 stop24h 20mMultiple Airlines
Sun 1/191:35 pmSEA - BSL
2 stops20h 25mMultiple Airlines
Deal found 12/29$495
This KLM deal was found by Cheapflights users on 12/30. 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 2/611:15 amBSL - SEA
1 stop33h 31mKLM
Sat 3/87:10 amSEA - BSL
2 stops18h 30mKLM
Deal found 12/30$532
This United Airlines deal was found by Cheapflights users on 12/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/127:10 amBSL - SEA
2 stops23h 20mUnited Airlines
Wed 2/1910:52 amSEA - BSL
2 stops20h 28mUnited Airlines
Deal found 12/29$566
This Air Canada deal was found by Cheapflights users on 12/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/411:00 amBSL - SEA
3 stops20h 07mAir Canada
Sat 3/87:05 pmSEA - BSL
2 stops33h 05mAir Canada
Deal found 12/30$578
This Delta deal was found by Cheapflights users on 12/30. 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 2/46:05 amBSL - SEA
1 stop14h 41mDelta
Sat 3/87:10 amSEA - BSL
2 stops18h 30mDelta
Deal found 12/30$591
This Lufthansa deal was found by Cheapflights users on 12/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/149:35 amBSL - SEA
1 stop12h 45mLufthansa
Sat 1/182:00 pmSEA - BSL
1 stop14h 25mLufthansa
Deal found 12/29$1,677
This Emirates deal was found by Cheapflights users on 12/29. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/121:10 pmBSL - SEA
1 stop32h 25mEmirates
Wed 2/194:05 pmSEA - BSL
1 stop35h 05mEmirates
Deal found 12/29$6,232

Find flights from Basel to Seattle within your budget

Customize your flight search to find flights from Basel 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 2,558,603 searches. Data last updated December 30, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 2/7

6:40 am-11:20 am

1 stop13h 40m

Seattle/Tacoma Intl

Sat 3/8

6:50 pm-6:00 pm

1 stop14h 10m

$459

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 2/4

6:55 am-11:20 am

1 stop13h 25m

Seattle/Tacoma Intl

Sat 3/8

6:50 pm-6:00 pm

1 stop14h 10m

$471

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 1/13

8:00 pm-11:20 am

1 stop24h 20m

Seattle/Tacoma Intl

Sun 1/19

1:35 pm-7:00 pm

2 stops20h 25m

$495

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/6

11:15 am-11:46 am

1 stop33h 31m

Seattle/Tacoma Intl

Sat 3/8

7:10 am-10:40 am

2 stops18h 30m

$532

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 2/12

7:10 am-9:30 pm

2 stops23h 20m

Seattle/Tacoma Intl

Wed 2/19

10:52 am-4:20 pm

2 stops20h 28m

$566

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 2/4

11:00 am-10:07 pm

3 stops20h 07m

Seattle/Tacoma Intl

Sat 3/8

7:05 pm-1:10 pm

2 stops33h 05m

$578

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 4/12

6:15 am-6:14 pm

2 stops20h 59m

Seattle/Tacoma Intl

Thu 5/1

2:10 pm-5:50 pm

1 stop18h 40m

$586

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 4/8

8:30 am-12:25 pm

1 stop12h 55m

Seattle/Tacoma Intl

Tue 5/6

6:31 am-9:10 am

2 stops17h 39m

$620

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 4/12

6:55 pm-5:10 pm

1 stop31h 15m

Seattle/Tacoma Intl

Sat 5/3

2:49 pm-6:00 pm

2 stops42h 11m

$1,178

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 2/12

1:10 pm-12:35 pm

1 stop32h 25m

Seattle/Tacoma Intl

Wed 2/19

4:05 pm-12:10 pm

1 stop35h 05m

$6,232

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 14 results
1
2

Best time to book a flight from Basel to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Basel 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.

Travel insights for flights from Basel to Seattle

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

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 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 December 30, 2024.
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Emirates
8.1
Very good
3,376 reviews
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Delta
8.0
Very good
8,540 reviews
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

KLM
7.8
Good
1,339 reviews
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

United Airlines
7.4
Good
8,984 reviews
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

American Airlines
7.2
Good
10,000 reviews
Emirates
8.1
Very good
3,376 reviews

Crew

8.3

Boarding

8.1

Food

7.9

Overall

8.1

Comfort

8.0

Entertainment

8.2

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Related info for your journey

Find useful and relevant information for your journey from Basel 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 Basel EuroAirport Swiss to Seattle round-trip?

    British Airways, at $459, was found to be the cheapest airline from Basel EuroAirport Swiss to Seattle.Alternate airlines to your destination round-trip include American Airlines and KLM.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Basel 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 Basel EuroAirport Swiss to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Seattle (average of $238). Flying from Basel EuroAirport Swiss to Seattle in July is currently the most expensive (average of $411). 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 Basel to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Basel to Portland flights
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.