What is the cheapest flight from Basel EuroAirport Swiss to Seattle?

In the last 3 days, the lowest price for a flight from Basel EuroAirport Swiss to Seattle was $635 for a one-way ticket and $566 for a round-trip. Visit our flight page for the latest deals!>/a>

Do I need a passport to fly between Basel and Seattle?

Yes, you'll most likely have to show a valid passport before boarding the plane in Basel and on arrival in Seattle. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Basel to Seattle?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Basel to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Basel to Seattle. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Basel to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Basel is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Basel to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Basel with another airline. Booking your flights between Basel and SEA can sometimes prove cheaper using this method. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Basel to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Basel up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$566 CHEAP FLIGHTS from Basel to Seattle (BSL - SEA)

BSL - SEA

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

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41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$566

American Airlines

Thu 2/19Mon 3/2

BSL - SEA • 1 stop

Cheapest one-way

$635

Multiple Airlines

Sun 12/28

BSL - SEA • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Seattle!

Flight Deals

Cheap Flights from Basel to Seattle (BSL-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Basel to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Basel to Seattle

Thu, Feb 19 - Mon, Mar 2

6:05 am - 4:55 pmBSL-SEA

19h 50m1 stop

6:00 am - 6:15 pmSEA-BSL

27h 15m2 stops

$566American Airlines

Find Deal

Thu, Feb 19 - Mon, Mar 2

6:05 am - 4:55 pmBSL-SEA

19h 50m1 stop

6:50 pm - 6:15 pmSEA-BSL

14h 25m1 stop

$567British Airways

Find Deal

Thu, Nov 13 - Tue, Nov 18

6:05 am - 11:45 amBSL-SEA

14h 40m1 stop

1:40 pm - 1:50 pmSEA-BSL

15h 10m1 stop

$606Delta

Find Deal

Thu, Nov 13 - Tue, Nov 18

10:35 am - 10:16 pmBSL-SEA

20h 41m2 stops

10:05 am - 12:30 pmSEA-BSL

17h 25m2 stops

$653Multiple Airlines

Find Deal

Wed, Dec 17 - Fri, Jan 9

9:50 am - 1:20 pmBSL-SEA

12h 30m1 stop

3:10 pm - 4:05 pmSEA-BSL

15h 55m1 stop

$658Lufthansa

Find Deal

Wed, Dec 17 - Fri, Jan 9

9:50 am - 12:50 amBSL-SEA

24h 00m2 stops

7:30 pm - 7:40 pmSEA-BSL

39h 10m2 stops

$659United Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

10:35 am - 10:16 pmBSL-SEA

20h 41m2 stops

2:00 pm - 6:30 pmSEA-BSL

19h 30m1 stop

$664Multiple Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

8:15 pm - 1:20 pmBSL-SEA

26h 05m1 stop

2:00 pm - 1:35 pmSEA-BSL

14h 35m1 stop

$673Lufthansa

Find Deal

Wed, Dec 17 - Sat, Dec 27

1:10 pm - 12:50 amBSL-SEA

20h 40m2 stops

11:15 pm - 12:30 pmSEA-BSL

28h 15m2 stops

$712United Airlines

Find Deal

Fri, Dec 19 - Thu, Jan 8

6:05 am - 4:21 pmBSL-SEA

19h 16m2 stops

7:10 am - 9:50 amSEA-BSL

17h 40m2 stops

$877Delta

Find Deal

Booking Insights

KAYAK's insights & trends for Basel to Seattle flights

Get data-powered insights and trends into flights from Basel to Seattle to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Basel to Seattle?

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($566) and British Airways ($567).

Find deals

Low season	November
High season	November
Cheapest flight	$566

Best time to beat the crowds with an average 22% drop in price.

Most popular time to fly and prices are also 22% lower on average.

Flight from Basel to Seattle

When to book flights from Basel to Seattle

Are your dates flexible? Find out the best times to travel from Basel to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Basel EuroAirport Swiss to Seattle?
In the last 3 days, the lowest price for a flight from Basel EuroAirport Swiss to Seattle was $635 for a one-way ticket and $566 for a round-trip.
Do I need a passport to fly between Basel and Seattle?
Yes, you'll most likely have to show a valid passport before boarding the plane in Basel and on arrival in Seattle.
Which aircraft models fly most regularly from Basel to Seattle?
We unfortunately don’t have that data for this specific route.
How does KAYAK find such low prices on flights from Basel to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Basel to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Basel to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Basel is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Basel to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Basel with another airline. Booking your flights between Basel and SEA can sometimes prove cheaper using this method.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Basel to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Basel up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Basel to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Basel (BSL)

Seattle (SEA)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

BSL - SEA

$566 Find Cheap Flights from Basel to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Everything you should know

Cheap Flights from Basel to Seattle (BSL-SEA)

Recent round-trip flight deals from Basel to Seattle

Recent one-way flight deals from Basel to Seattle

KAYAK's insights & trends for Basel to Seattle flights

Get data-powered insights and trends into flights from Basel to Seattle to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Basel to Seattle?

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($566) and British Airways ($567).

Good to know

When to book flights from Basel to Seattle

FAQs for booking Basel to Seattle flights

What is the cheapest flight from Basel EuroAirport Swiss to Seattle?

In the last 3 days, the lowest price for a flight from Basel EuroAirport Swiss to Seattle was $635 for a one-way ticket and $566 for a round-trip.

Do I need a passport to fly between Basel and Seattle?

Yes, you'll most likely have to show a valid passport before boarding the plane in Basel and on arrival in Seattle.

Which aircraft models fly most regularly from Basel to Seattle?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Basel to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Basel to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Basel to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Basel is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Basel to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Basel with another airline. Booking your flights between Basel and SEA can sometimes prove cheaper using this method.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Basel to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Basel up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Basel to Seattle

Information on your arrival and departure airports

Cabin class types available on flights to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights to and from Basel and Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Basel

Find deals for your return flight