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Cheap flights from Washington to Basel from $279

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 10/20. 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

Multiple Airlines Logo
8:00 am - 7:45 pmSEA-BSL
26h 45m2 stops
Multiple Airlines Logo
9:50 am - 1:20 pmBSL-SEA
12h 30m1 stop
$462Multiple Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
Air France Logo
1:30 pm - 1:10 pmSEA-BSL
14h 40m1 stop
Air France Logo
11:15 am - 11:45 amBSL-SEA
33h 30m1 stop
$487Air France
Find Deal
Mon, Oct 20 - Mon, Nov 3
Air France Logo
2:05 pm - 1:50 pmSEA-BSL
14h 45m1 stop
Air France Logo
6:05 am - 11:45 amBSL-SEA
14h 40m1 stop
$488Air France
Find Deal
Wed, Nov 5 - Wed, Nov 12
Delta Logo
2:00 pm - 9:50 amSEA-BSL
34h 50m1 stop
Delta Logo
10:30 am - 10:01 amBSL-SEA
32h 31m2 stops
$499Delta
Find Deal
Wed, Jan 7 - Wed, Jan 14
Delta Logo
2:00 pm - 9:50 amSEA-BSL
34h 50m1 stop
Delta Logo
11:15 am - 10:16 pmBSL-SEA
44h 01m2 stops
$500Delta
Find Deal
Wed, Jan 7 - Tue, Jan 13
KLM Logo
2:00 pm - 9:50 amSEA-BSL
34h 50m1 stop
KLM Logo
2:30 pm - 1:20 pmBSL-SEA
31h 50m1 stop
$502KLM
Find Deal
Wed, Jan 7 - Tue, Jan 13
United Airlines Logo
12:35 pm - 4:05 pmSEA-BSL
18h 30m2 stops
United Airlines Logo
9:50 am - 11:15 pmBSL-SEA
22h 25m3 stops
$529United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
Austrian Airlines Logo
8:00 am - 7:45 pmSEA-BSL
26h 45m2 stops
Austrian Airlines Logo
10:10 am - 8:37 pmBSL-SEA
43h 27m2 stops
$535Austrian Airlines
Find Deal
Wed, Jan 7 - Tue, Jan 13
KLM Logo
1:40 pm - 1:50 pmSEA-BSL
15h 10m1 stop
KLM Logo
11:15 am - 11:50 amBSL-SEA
33h 35m1 stop
$538KLM
Find Deal
Thu, Jan 8 - Thu, Jan 15
United Airlines Logo
7:00 am - 7:40 pmSEA-BSL
27h 40m2 stops
United Airlines Logo
9:50 am - 1:20 pmBSL-SEA
12h 30m1 stop
$549United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 26

Lufthansa flights from State of Washington to Basel EuroAirport Swiss

Our best Lufthansa deals on State of Washington to Basel EuroAirport Swiss flight tickets
Lufthansa
Nov 30
SEA3:10 pmSeattle/Tacoma Intl
12h 20m
1 stop
BSL12:30 pmBasel EuroAirport Swiss
Dec 7
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$554
Find similar
Lufthansa
Dec 8
SEA2:00 pmSeattle/Tacoma Intl
14h 15m
1 stop
BSL1:15 pmBasel EuroAirport Swiss
Dec 26
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$563
Find similar
Lufthansa
Nov 19
SEA3:10 pmSeattle/Tacoma Intl
19h 30m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Nov 23
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$564
Find similar

Air France flights from State of Washington to Basel EuroAirport Swiss

Our best Air France deals on State of Washington to Basel EuroAirport Swiss flight tickets
Air France
Oct 20
SEA1:30 pmSeattle/Tacoma Intl
14h 40m
1 stop
BSL1:10 pmBasel EuroAirport Swiss
Nov 3
BSL11:15 amBasel EuroAirport Swiss
33h 30m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$487
Find similar
Air France
Nov 5
SEA2:05 pmSeattle/Tacoma Intl
14h 45m
1 stop
BSL1:50 pmBasel EuroAirport Swiss
Nov 12
BSL6:05 amBasel EuroAirport Swiss
14h 40m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$488
Find similar
Air France
Jan 7
SEA2:00 pmSeattle/Tacoma Intl
34h 50m
1 stop
BSL9:50 amBasel EuroAirport Swiss
Jan 14
BSL11:15 amBasel EuroAirport Swiss
33h 35m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$490
Find similar

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 September 22, 2025.
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

Wed 11/5

8:00 am-7:45 pm

2 stops26h 45m

Basel EuroAirport Swiss

Wed 11/12

9:50 am-1:20 pm

1 stop12h 30m

$462

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 10/20

1:30 pm-1:10 pm

1 stop14h 40m

Basel EuroAirport Swiss

Mon 11/3

11:15 am-11:45 am

1 stop33h 30m

$487

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/5

2:05 pm-1:50 pm

1 stop14h 45m

Basel EuroAirport Swiss

Wed 11/12

6:05 am-11:45 am

1 stop14h 40m

$488

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

Wed 1/14

10:30 am-10:01 am

2 stops32h 31m

$499

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

Tue 1/13

11:15 am-10:16 pm

2 stops44h 01m

$500

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

Tue 1/13

2:30 pm-1:20 pm

1 stop31h 50m

$502

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/5

12:35 pm-4:05 pm

2 stops18h 30m

Basel EuroAirport Swiss

Wed 11/12

9:50 am-11:15 pm

3 stops22h 25m

$529

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 1/7

8:00 am-7:45 pm

2 stops26h 45m

Basel EuroAirport Swiss

Tue 1/13

10:10 am-8:37 pm

2 stops43h 27m

$535

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Thu 1/8

1:40 pm-1:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

Thu 1/15

11:15 am-11:50 am

1 stop33h 35m

$538

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 12/8

7:00 am-7:40 pm

2 stops27h 40m

Basel EuroAirport Swiss

Fri 12/26

9:50 am-1:20 pm

1 stop12h 30m

$549

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 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 day to depart on your flight to Basel EuroAirport Swiss?

According to our data, Wednesday is the cheapest day to fly to Basel EuroAirport Swiss from State of Washington. The lowest ticket price found for a Wednesday departure recently was $590. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from State of Washington to Basel EuroAirport Swiss on a Friday will generally be more expensive and average around $1,201. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Basel EuroAirport Swiss?

According to our data, the cheapest time of day to fly to Basel EuroAirport Swiss is in the evening. momondo users have found flights departing from State of Washington to Basel EuroAirport Swiss in the evening for as low as $590. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $767. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You could potentially save up to 46% 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

Direct flights

None
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 $481Free CancellationRating
6.7
7,386 reviews
Search British Airways flights
LufthansaPriceFrom $571Free CancellationRating
6.8
7,421 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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