$513 Cheap Flights from Seattle (SEA) to Basel (BSL)

View $513 flight on Wed, Dec 9, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to EuroAirport Airport (BSL)

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Cheap Flights from Seattle to Basel (SEA-BSL)

Prices were available within the past 7 days and start at $513 for one-way flights and $707 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
BSL
Basel
$707 Roundtrip, found 6 days ago
$707
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Nov 4 from Seattle to Basel, returning Wed, Nov 11, priced at $707 found 6 days ago
British Airways
Mon, Nov 30 - Wed, Dec 16
SEA
Seattle
BSL
Basel
$708 Roundtrip, found 3 days ago
$708
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Nov 30 from Seattle to Basel, returning Wed, Dec 16, priced at $708 found 3 days ago
American Airlines
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
BSL
Basel
$709 Roundtrip, found 6 days ago
$709
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Nov 4 from Seattle to Basel, returning Wed, Nov 11, priced at $709 found 6 days ago
British Airways
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
BSL
Basel
$711 Roundtrip, found 6 days ago
$711
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Nov 4 from Seattle to Basel, returning Wed, Nov 11, priced at $711 found 6 days ago
Lufthansa
Mon, Nov 30 - Wed, Dec 16
SEA
Seattle
BSL
Basel
$716 Roundtrip, found 3 days ago
$716
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Nov 30 from Seattle to Basel, returning Wed, Dec 16, priced at $716 found 3 days ago
British Airways
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
BSL
Basel
$717 Roundtrip, found 6 days ago
$717
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Nov 4 from Seattle to Basel, returning Wed, Nov 11, priced at $717 found 6 days ago
British Airways
Mon, Nov 30 - Wed, Dec 16
SEA
Seattle
BSL
Basel
$718 Roundtrip, found 3 days ago
$718
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Nov 30 from Seattle to Basel, returning Wed, Dec 16, priced at $718 found 3 days ago
British Airways
Wed, Nov 4 - Wed, Nov 11
SEA
Seattle
BSL
Basel
$722 Roundtrip, found 6 days ago
$722
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Nov 4 from Seattle to Basel, returning Wed, Nov 11, priced at $722 found 6 days ago
United
Mon, Aug 17 - Wed, Sep 30
SEA
Seattle
BSL
Basel
$769 Roundtrip, found 12 hours ago
$769
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Aug 17 from Seattle to Basel, returning Wed, Sep 30, priced at $769 found 12 hours ago
Air Canada
Mon, Oct 5 - Tue, Oct 13
SEA
Seattle
BSL
Basel
$778 Roundtrip, found 1 day ago
$778
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Oct 5 from Seattle to Basel, returning Tue, Oct 13, priced at $778 found 1 day ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) cost?
You can find cheap one-way flights from $513 and cheap return flights from $707 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) with Expedia. Return flights often range between $508 and $4803. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
The cheapest month to fly from SEA to BSL is November when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
Enter SEA to BSL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
Virgin Atlantic is one of the cheapest airlines offering connecting flights from Seattle - Tacoma Intl. (SEA) to EuroAirport Basel (BSL), with round-trip tickets starting from around $543. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
The earliest flight from Seattle, Washington (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) typically departs at around 12:55 AM, operated by American Airlines. This seasonal service is available in August, allowing you to start your European adventure early. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
The most popular departure times for flights from Seattle (SEA) to Basel (BSL) are in the early morning, from 6am to 9am. About 31% of passengers prefer this time window. Many major carriers, including United Airlines and Lufthansa, offer flights during this window. This timing is favored because it allows you to arrive in Europe with plenty of time to start your day.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
Flying from SEA to BSL with a connection usually takes about 14 hours 50 minutes, traveling roughly 5,211 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
Select the "Business class" and "First class" filters when looking for SEA to BSL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Basel from Seattle - Tacoma Intl. (SEA)?
From Seattle - Tacoma Intl. (SEA), you can fly into EuroAirport Basel (BSL) and Basel SBB Train Station (ZDH) in Basel. Some flights may connect through major hubs like O'Hare Intl. (ORD), San Francisco Intl. (SFO), Denver Intl. (DEN) before reaching Basel. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Basel (BSL-EuroAirport) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
EuroAirport
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Iberia, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$706
Distance
5210 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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