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Cheap flights from Washington to Basel from $357

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Basel departing on 2/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Air France Logo
4:05 pm - 10:40 am
SEA
-
BSL
34h 35m
1 stop
Air France Logo
2:25 pm - 11:45 am
BSL
-
SEA
30h 20m
1 stop
$488Air France
Tue, Mar 24 - Tue, Mar 31
Air France Logo
3:05 pm - 10:40 am
SEA
-
BSL
34h 35m
1 stop
Air France Logo
11:15 am - 12:35 pm
BSL
-
SEA
33h 20m
1 stop
$490Air France
Sat, Mar 7 - Sat, Mar 14
Air France Logo
7:10 am - 10:40 am
SEA
-
BSL
18h 30m
2 stops
Air France Logo
11:15 am - 12:35 pm
BSL
-
SEA
33h 20m
1 stop
$494Air France
Sat, Mar 7 - Sat, Mar 14
Delta Logo
7:20 am - 1:50 pm
SEA
-
BSL
22h 30m
2 stops
Delta Logo
6:05 am - 7:05 pm
BSL
-
SEA
21h 00m
2 stops
$499Delta
Wed, Mar 18 - Wed, Mar 25
Delta Logo
7:20 am - 10:40 am
SEA
-
BSL
19h 20m
2 stops
Delta Logo
10:15 am - 8:50 pm
BSL
-
SEA
19h 35m
2 stops
$504Delta
Tue, Mar 24 - Tue, Mar 31
Scandinavian Airlines Logo
4:05 pm - 5:25 pm
SEA
-
BSL
17h 20m
1 stop
Scandinavian Airlines Logo
2:25 pm - 11:45 am
BSL
-
SEA
30h 20m
1 stop
$517Scandinavian Airlines
Tue, Mar 24 - Mon, Mar 30
Scandinavian Airlines Logo
7:20 am - 10:40 am
SEA
-
BSL
19h 20m
2 stops
Scandinavian Airlines Logo
2:25 pm - 11:45 am
BSL
-
SEA
30h 20m
1 stop
$521Scandinavian Airlines
Tue, Mar 24 - Mon, Mar 30
British Airways Logo
2:25 pm - 3:05 pm
SEA
-
BSL
16h 40m
1 stop
British Airways Logo
8:15 am - 11:04 pm
BSL
-
SEA
23h 49m
2 stops
$532British Airways
Tue, Mar 24 - Tue, Mar 31
British Airways Logo
5:45 pm - 10:15 am
PDX
-
BSL
31h 30m
1 stop
British Airways Logo
6:35 am - 3:55 pm
BSL
-
PDX
18h 20m
1 stop
$643British Airways
Wed, Mar 4 - Sun, Mar 8
Lufthansa Logo
7:49 pm - 7:40 pm
PDX
-
BSL
15h 51m
2 stops
Lufthansa Logo
9:50 am - 5:45 pm
BSL
-
PDX
16h 55m
2 stops
$836Lufthansa
Tue, Mar 24 - Tue, Mar 31

United Airlines flights from State of Washington to Basel EuroAirport Swiss

Our best United Airlines deals on State of Washington to Basel EuroAirport Swiss flight tickets
United Airlines
Mar 22
SEA12:36 pmSeattle/Tacoma Intl
47h 04m
2 stops
BSL7:40 pmBasel EuroAirport Swiss
Mar 29
BSL8:20 amBasel EuroAirport Swiss
43h 40m
2 stops
SEA7:00 pmSeattle/Tacoma Intl
$620
United Airlines
Mar 29
SEA8:43 amSeattle/Tacoma Intl
24h 27m
2 stops
BSL6:10 pmBasel EuroAirport Swiss
Apr 5
BSL11:00 amBasel EuroAirport Swiss
43h 06m
2 stops
SEA9:06 pmSeattle/Tacoma Intl
$705
United Airlines
Mar 22
SEA12:36 pmSeattle/Tacoma Intl
43h 29m
2 stops
BSL4:05 pmBasel EuroAirport Swiss
Mar 29
BSL2:40 pmBasel EuroAirport Swiss
40h 13m
2 stops
SEA9:53 pmSeattle/Tacoma Intl
$786

Delta flights from State of Washington to Basel EuroAirport Swiss

Our best Delta deals on State of Washington to Basel EuroAirport Swiss flight tickets
Delta
Mar 18
SEA7:20 amSeattle/Tacoma Intl
22h 30m
2 stops
BSL1:50 pmBasel EuroAirport Swiss
Mar 25
BSL6:05 amBasel EuroAirport Swiss
21h 00m
2 stops
SEA7:05 pmSeattle/Tacoma Intl
$499
Delta
Mar 24
SEA7:20 amSeattle/Tacoma Intl
19h 20m
2 stops
BSL10:40 amBasel EuroAirport Swiss
Mar 31
BSL10:15 amBasel EuroAirport Swiss
19h 35m
2 stops
SEA8:50 pmSeattle/Tacoma Intl
$504
Delta
Mar 24
SEA7:20 amSeattle/Tacoma Intl
19h 20m
2 stops
BSL10:40 amBasel EuroAirport Swiss
Mar 30
BSL10:15 amBasel EuroAirport Swiss
20h 55m
2 stops
SEA10:10 pmSeattle/Tacoma Intl
$604

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 February 7, 2026.
Use the filters below to find and compare flights from Washington to Basel EuroAirport Swiss that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/24

4:05 pm-10:40 am

1 stop34h 35m

Basel EuroAirport Swiss

Tue 3/31

2:25 pm-11:45 am

1 stop30h 20m

$488

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 3/7

3:05 pm-10:40 am

1 stop34h 35m

Basel EuroAirport Swiss

Sat 3/14

11:15 am-12:35 pm

1 stop33h 20m

$490

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 3/7

7:10 am-10:40 am

2 stops18h 30m

Basel EuroAirport Swiss

Sat 3/14

11:15 am-12:35 pm

1 stop33h 20m

$494

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 3/18

7:20 am-1:50 pm

2 stops22h 30m

Basel EuroAirport Swiss

Wed 3/25

6:05 am-7:05 pm

2 stops21h 00m

$499

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/24

7:20 am-10:40 am

2 stops19h 20m

Basel EuroAirport Swiss

Tue 3/31

10:15 am-8:50 pm

2 stops19h 35m

$504

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/24

4:05 pm-5:25 pm

1 stop17h 20m

Basel EuroAirport Swiss

Mon 3/30

2:25 pm-11:45 am

1 stop30h 20m

$517

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/24

7:20 am-10:40 am

2 stops19h 20m

Basel EuroAirport Swiss

Mon 3/30

2:25 pm-11:45 am

1 stop30h 20m

$521

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/24

2:25 pm-3:05 pm

1 stop16h 40m

Basel EuroAirport Swiss

Tue 3/31

8:15 am-11:04 pm

2 stops23h 49m

$532

PortlandBasel

PDX - BSL

PDXBSL

Portland

Wed 3/4

5:45 pm-10:15 am

1 stop31h 30m

Basel EuroAirport Swiss

Sun 3/8

6:35 am-3:55 pm

1 stop18h 20m

$643

PortlandBasel

PDX - BSL

PDXBSL

Portland

Tue 3/24

7:49 pm-7:40 pm

2 stops15h 51m

Basel EuroAirport Swiss

Tue 3/31

9:50 am-5:45 pm

2 stops16h 55m

$836

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 State of Washington 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 August, then departing from State of Washington during the month February is also very affordable. Most momondo users find prices during this month for around $509.

Can stopping save me money on State of Washington to Basel EuroAirport Swiss flights?

You could potentially save up to 7% on your flight if you consider stops on a State of Washington to Basel EuroAirport Swiss flight.

Cheap State of Washington to Basel EuroAirport Swiss flight deals and tips

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

Fastest flight time

13h 10m

Direct flights

None
The fastest flight from State of Washington to Basel EuroAirport Swiss takes 13h 10m
There are no direct flights from State of Washington to Basel EuroAirport Swiss. There are no popular flight routes from State of Washington to Basel EuroAirport Swiss.
Search flight deals

  • When did momondo last update prices for flights from Washington to Basel EuroAirport Swiss?

    Prices for flights from Washington to Basel EuroAirport Swiss are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington to Basel EuroAirport Swiss?

  • How old do you have to be to fly from Washington to Basel EuroAirport Swiss?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Basel EuroAirport Swiss.

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

    The travel and health documents you'll need for your trip to Basel EuroAirport Swiss may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Basel EuroAirport Swiss. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Basel EuroAirport Swiss

Compare and see reviews for airlines that fly from State of Washington to Basel EuroAirport Swiss with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $467Free CancellationRating
6.7
7,719 reviews
Search British Airways flights
LufthansaPriceFrom $483Free CancellationRating
6.8
7,769 reviews
Search Lufthansa flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Basel. momondo saves you time and could save you money on your trip.

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

Flights from Washington 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 Washington to Basel?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Basel from Washington.

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

Yes momondo offers price alerts on flights to Basel from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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