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Cheap flights from Seattle to Basel from $332

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 5/27. 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.
United Airlines Logo
3:10 pm - 4:05 pm
SEA
-
BSL
15h 55m
1 stop
United Airlines Logo
9:50 am - 1:20 pm
BSL
-
SEA
12h 30m
1 stop
$706United Airlines
Wed, Nov 4 - Fri, Nov 13
British Airways Logo
1:25 pm - 10:20 pm
SEA
-
BSL
23h 55m
1 stop
British Airways Logo
7:00 am - 4:55 pm
BSL
-
SEA
18h 55m
1 stop
$709British Airways
Tue, Nov 3 - Fri, Nov 13
United Airlines Logo
5:07 am - 12:30 pm
SEA
-
BSL
22h 23m
2 stops
United Airlines Logo
9:50 am - 1:20 pm
BSL
-
SEA
12h 30m
1 stop
$710United Airlines
Tue, Nov 3 - Fri, Nov 13
United Airlines Logo
3:10 pm - 4:05 pm
SEA
-
BSL
15h 55m
1 stop
United Airlines Logo
9:50 am - 6:09 pm
BSL
-
SEA
17h 19m
2 stops
$716United Airlines
Wed, Nov 4 - Tue, Nov 17
Lufthansa Logo
7:00 am - 7:40 pm
SEA
-
BSL
27h 40m
2 stops
Lufthansa Logo
6:45 am - 12:10 pm
BSL
-
SEA
14h 25m
1 stop
$719Lufthansa
Tue, Nov 3 - Thu, Nov 19
United Airlines Logo
6:50 am - 9:10 am
SEA
-
BSL
17h 20m
2 stops
United Airlines Logo
9:50 am - 6:09 pm
BSL
-
SEA
17h 19m
2 stops
$720United Airlines
Tue, Nov 3 - Wed, Nov 18
United Airlines Logo
3:10 pm - 4:05 pm
SEA
-
BSL
15h 55m
1 stop
United Airlines Logo
1:10 pm - 6:09 pm
BSL
-
SEA
37h 59m
2 stops
$726United Airlines
Wed, Nov 4 - Mon, Nov 16
United Airlines Logo
6:50 am - 9:10 am
SEA
-
BSL
17h 20m
2 stops
United Airlines Logo
1:10 pm - 6:09 pm
BSL
-
SEA
37h 59m
2 stops
$731United Airlines
Tue, Nov 3 - Mon, Nov 16
Lufthansa Logo
7:00 am - 7:40 pm
SEA
-
BSL
27h 40m
2 stops
Lufthansa Logo
7:05 pm - 12:10 pm
BSL
-
SEA
26h 05m
1 stop
$739Lufthansa
Tue, Nov 3 - Mon, Nov 16
United Airlines Logo
3:10 pm - 4:05 pm
SEA
-
BSL
15h 55m
1 stop
United Airlines Logo
9:50 am - 1:20 pm
BSL
-
SEA
12h 30m
1 stop
$756United Airlines
Wed, Nov 4 - Sun, Nov 15

Delta flights from Seattle to Basel EuroAirport Swiss

Our best Delta deals on Seattle to Basel EuroAirport Swiss flight tickets
Delta
Jul 19
SEA1:30 pmSeattle/Tacoma Intl
15h 00m
1 stop
BSL1:30 pmBasel EuroAirport Swiss
Jul 27
BSL6:30 amBasel EuroAirport Swiss
19h 30m
2 stops
SEA5:00 pmSeattle/Tacoma Intl
$1,052
Delta
Jul 19
SEA7:20 amSeattle/Tacoma Intl
17h 25m
2 stops
BSL9:45 amBasel EuroAirport Swiss
Jul 27
BSL6:30 amBasel EuroAirport Swiss
21h 41m
2 stops
SEA7:11 pmSeattle/Tacoma Intl
$1,061

British Airways flights from Seattle to Basel EuroAirport Swiss

Our best British Airways deals on Seattle to Basel EuroAirport Swiss flight tickets
British Airways
Nov 3
SEA1:25 pmSeattle/Tacoma Intl
23h 55m
1 stop
BSL10:20 pmBasel EuroAirport Swiss
Nov 13
BSL7:00 amBasel EuroAirport Swiss
18h 55m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$709
British Airways
Nov 3
SEA6:50 pmSeattle/Tacoma Intl
18h 30m
1 stop
BSL10:20 pmBasel EuroAirport Swiss
Nov 15
BSL6:35 amBasel EuroAirport Swiss
19h 20m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$759
British Airways
Oct 31
SEA3:10 pmSeattle/Tacoma Intl
16h 25m
2 stops
BSL3:35 pmBasel EuroAirport Swiss
Nov 15
BSL11:20 amBasel EuroAirport Swiss
16h 34m
2 stops
SEA6:54 pmSeattle/Tacoma Intl
$1,127

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Basel EuroAirport Swiss 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 May 8, 2026.
Use the filters below to find and compare flights from Seattle to Basel EuroAirport Swiss that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-4:05 pm

1 stop15h 55m

Basel EuroAirport Swiss

Fri 11/13

9:50 am-1:20 pm

1 stop12h 30m

$706

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

1:25 pm-10:20 pm

1 stop23h 55m

Basel EuroAirport Swiss

Fri 11/13

7:00 am-4:55 pm

1 stop18h 55m

$709

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

5:07 am-12:30 pm

2 stops22h 23m

Basel EuroAirport Swiss

Fri 11/13

9:50 am-1:20 pm

1 stop12h 30m

$710

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-4:05 pm

1 stop15h 55m

Basel EuroAirport Swiss

Tue 11/17

9:50 am-6:09 pm

2 stops17h 19m

$716

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

7:00 am-7:40 pm

2 stops27h 40m

Basel EuroAirport Swiss

Thu 11/19

6:45 am-12:10 pm

1 stop14h 25m

$719

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

6:50 am-9:10 am

2 stops17h 20m

Basel EuroAirport Swiss

Wed 11/18

9:50 am-6:09 pm

2 stops17h 19m

$720

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-4:05 pm

1 stop15h 55m

Basel EuroAirport Swiss

Mon 11/16

1:10 pm-6:09 pm

2 stops37h 59m

$726

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

6:50 am-9:10 am

2 stops17h 20m

Basel EuroAirport Swiss

Mon 11/16

1:10 pm-6:09 pm

2 stops37h 59m

$731

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/3

7:00 am-7:40 pm

2 stops27h 40m

Basel EuroAirport Swiss

Mon 11/16

7:05 pm-12:10 pm

1 stop26h 05m

$739

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-4:05 pm

1 stop15h 55m

Basel EuroAirport Swiss

Sun 11/15

9:50 am-1:20 pm

1 stop12h 30m

$756

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Basel from

How to get the cheapest flight ticket from Seattle to Basel EuroAirport Swiss

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 cheapest month to fly to Basel EuroAirport Swiss?

If you are unable to visit Basel EuroAirport Swiss during the month of April, then departing from Seattle during the month August is also very affordable. Most momondo users find prices during this month for around $389.

Can stopping save me money on Seattle to Basel EuroAirport Swiss flights?

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

When to book flights from Seattle to Basel EuroAirport Swiss

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

Cheap Seattle to Basel EuroAirport Swiss (SEA to BSL) flight deals and tips

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

Fastest flight time

12h 25m

Direct flights

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

Frequently asked questions about flying from Seattle to Basel EuroAirport Swiss

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

    Seattle/Tacoma Intl and Basel EuroAirport Swiss are 5198.6 mi apart from one another. A reasonable flight in good conditions will take 12h 25m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Basel EuroAirport Swiss refresh daily.

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

    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 EuroAirport Swiss.

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

    The travel and health documents required for your trip to Basel EuroAirport Swiss 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 EuroAirport Swiss. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Basel from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Basel quick and easy, saving you time and money.

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

Flights from Seattle to Basel with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Seattle to Basel flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Basel, momondo offers a useful price alert feature which will track prices for flights to Basel from Seattle and alert you when they change.

An easier way to manage your Basel EuroAirport Swiss trip

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