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Cheap flights from Seattle to Basel from $362

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Basel departing on 7/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Basel

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
1:30 pm - 6:20 pm
SEA
-
BSL
19h 50m
1 stop
British Airways Logo
7:10 pm - 11:35 am
BSL
-
SEA
25h 25m
1 stop
$763British Airways
Mon, Oct 5 - Tue, Oct 13
United Airlines Logo
7:00 am - 9:15 am
SEA
-
BSL
17h 15m
2 stops
United Airlines Logo
8:15 am - 12:20 pm
BSL
-
SEA
13h 05m
1 stop
$769United Airlines
Mon, Oct 5 - Tue, Oct 13
Lufthansa Logo
6:50 pm - 7:40 pm
SEA
-
BSL
15h 50m
1 stop
Lufthansa Logo
8:15 pm - 4:59 pm
BSL
-
SEA
29h 44m
1 stop
$776Lufthansa
Sun, Sep 6 - Mon, Sep 14
Multiple Airlines Logo
8:00 am - 1:40 pm
SEA
-
BSL
20h 40m
2 stops
Multiple Airlines Logo
8:15 pm - 4:59 pm
BSL
-
SEA
29h 44m
1 stop
$781Multiple Airlines
Sun, Sep 6 - Mon, Sep 14
Multiple Airlines Logo
8:00 am - 1:40 pm
SEA
-
BSL
20h 40m
2 stops
Multiple Airlines Logo
8:15 pm - 11:55 am
BSL
-
SEA
24h 40m
2 stops
$793Multiple Airlines
Sun, Sep 6 - Mon, Sep 14
Multiple Airlines Logo
11:25 pm - 8:35 am
SEA
-
BSL
24h 10m
2 stops
Multiple Airlines Logo
6:30 am - 11:45 am
BSL
-
SEA
14h 15m
1 stop
$815Multiple Airlines
Sat, May 23 - Tue, Jun 2
Multiple Airlines Logo
5:40 am - 10:10 am
SEA
-
BSL
19h 30m
2 stops
Multiple Airlines Logo
11:00 am - 12:20 pm
BSL
-
SEA
34h 20m
1 stop
$835Multiple Airlines
Sun, Oct 11 - Sat, Oct 17
Lufthansa Logo
6:50 pm - 7:40 pm
SEA
-
BSL
15h 50m
1 stop
Lufthansa Logo
6:45 pm - 12:20 pm
BSL
-
SEA
26h 35m
1 stop
$845Lufthansa
Sun, Oct 11 - Sat, Oct 17
Multiple Airlines Logo
10:30 am - 10:10 am
SEA
-
BSL
14h 40m
2 stops
Multiple Airlines Logo
6:45 pm - 4:59 pm
BSL
-
SEA
31h 14m
2 stops
$851Multiple Airlines
Sun, Oct 11 - Sat, Oct 17
Multiple Airlines Logo
7:00 pm - 7:10 pm
SEA
-
BSL
15h 10m
2 stops
Multiple Airlines Logo
6:50 pm - 11:45 am
BSL
-
SEA
25h 55m
2 stops
$886Multiple Airlines
Mon, May 25 - Mon, Jun 1

British Airways flights from Seattle to Basel

Our best British Airways deals on Seattle to Basel flight tickets
British Airways
Oct 5
SEA1:30 pmSeattle/Tacoma Intl
19h 50m
1 stop
BSL6:20 pmBasel EuroAirport Swiss
Oct 13
BSL7:10 pmBasel EuroAirport Swiss
25h 25m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$763
British Airways
Sep 2
SEA1:30 pmSeattle/Tacoma Intl
12h 45m
1 stop
BSL11:15 amBasel EuroAirport Swiss
Sep 13
BSL7:15 amBasel EuroAirport Swiss
13h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$912
British Airways
Sep 4
SEA1:30 pmSeattle/Tacoma Intl
12h 30m
1 stop
BSL11:00 amBasel EuroAirport Swiss
Sep 13
BSL7:15 amBasel EuroAirport Swiss
13h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$969

Lufthansa flights from Seattle to Basel

Our best Lufthansa deals on Seattle to Basel flight tickets
Lufthansa
Sep 6
SEA6:50 pmSeattle/Tacoma Intl
15h 50m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Sep 14
BSL8:15 pmBasel EuroAirport Swiss
29h 44m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$776
Lufthansa
Oct 11
SEA6:50 pmSeattle/Tacoma Intl
15h 50m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Oct 17
BSL6:45 pmBasel EuroAirport Swiss
26h 35m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$845

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Basel 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, momondo users made 832,500 searches. Data last updated April 14, 2026.
Use the filters below to find and compare flights from Seattle to Basel that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 10/5

1:30 pm-6:20 pm

1 stop19h 50m

Basel EuroAirport Swiss

Tue 10/13

7:10 pm-11:35 am

1 stop25h 25m

$763
Quickest round-trip

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 10/5

7:00 am-9:15 am

2 stops17h 15m

Basel EuroAirport Swiss

Tue 10/13

8:15 am-12:20 pm

1 stop13h 05m

$769

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-7:40 pm

1 stop15h 50m

Basel EuroAirport Swiss

Mon 9/14

8:15 pm-4:59 pm

1 stop29h 44m

$776

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/6

8:00 am-1:40 pm

2 stops20h 40m

Basel EuroAirport Swiss

Mon 9/14

8:15 pm-4:59 pm

1 stop29h 44m

$781

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/6

8:00 am-1:40 pm

2 stops20h 40m

Basel EuroAirport Swiss

Mon 9/14

8:15 pm-11:55 am

2 stops24h 40m

$793

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 5/23

11:25 pm-8:35 am

2 stops24h 10m

Basel EuroAirport Swiss

Tue 6/2

6:30 am-11:45 am

1 stop14h 15m

$815

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 10/11

5:40 am-10:10 am

2 stops19h 30m

Basel EuroAirport Swiss

Sat 10/17

11:00 am-12:20 pm

1 stop34h 20m

$835

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 10/11

6:50 pm-7:40 pm

1 stop15h 50m

Basel EuroAirport Swiss

Sat 10/17

6:45 pm-12:20 pm

1 stop26h 35m

$845

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 10/11

10:30 am-10:10 am

2 stops14h 40m

Basel EuroAirport Swiss

Sat 10/17

6:45 pm-4:59 pm

2 stops31h 14m

$851

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 5/25

7:00 pm-7:10 pm

2 stops15h 10m

Basel EuroAirport Swiss

Mon 6/1

6:50 pm-11:45 am

2 stops25h 55m

$886

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Basel

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Basel?

Can stopping save me money on Seattle to Basel flights?

You could potentially save up to 3% on your flight if you consider stops on a Seattle to Basel flight.

When to book flights from Seattle to Basel

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Basel according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Basel (SEA to EAP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Basel

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from Seattle to Basel takes 12h 25m
There are no direct flights from Seattle to Basel. There are no popular flight routes from Seattle to Basel.
Search flight deals

Frequently asked questions about flying from Seattle to Basel

  • How far is Seattle/Tacoma Intl to Basel by plane?

    A flight from Seattle/Tacoma Intl to Basel will travel around 5202.0 mi. Typically, this will take 12h 25m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Basel?

    Prices for flights from Seattle/Tacoma Intl Airport to Basel are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Basel?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Basel?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Basel.

  • What documentation or ID do you need to fly to Basel?

    The travel and health documents required for your trip to Basel can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Basel. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Basel?

Best airlines flying from Seattle to Basel

Compare and see reviews for airlines that fly from Seattle to Basel with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $483Free CancellationRating
6.8
7,921 reviews
Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Basel?

It is quick and easy to find Seattle to Basel flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Basel that suits you.

Can I find flights from Seattle to Basel with flexible booking policies on momondo?

Yes. All flights to Basel from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Basel?

Once you have performed a search for Seattle to Basel flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to Basel right now. Can momondo alert me if prices change?

Price alerts on flights to Basel from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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