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Cheap flights from Washington to Basel from $312

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 10/17. 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

British Airways Logo
7:50 pm - 10:05 pmSEA-BSL
18h 15m1 stop
British Airways Logo
4:00 pm - 11:30 amBSL-SEA
28h 30m1 stop
$450British Airways
Find Deal
Wed, Oct 29 - Mon, Nov 10
British Airways Logo
10:32 am - 2:55 pmSEA-BSL
20h 23m2 stops
British Airways Logo
4:00 pm - 11:30 amBSL-SEA
28h 30m1 stop
$456British Airways
Find Deal
Wed, Oct 29 - Mon, Nov 10
Delta Logo
5:40 pm - 5:50 pmSEA-BSL
15h 10m1 stop
Delta Logo
6:15 am - 3:55 pmBSL-SEA
18h 40m1 stop
$480Delta
Find Deal
Mon, Aug 18 - Tue, Aug 26
Delta Logo
5:40 pm - 5:50 pmSEA-BSL
15h 10m1 stop
Delta Logo
6:15 am - 4:44 pmBSL-SEA
19h 29m2 stops
$490Delta
Find Deal
Mon, Aug 18 - Tue, Aug 26
Lufthansa Logo
6:50 pm - 7:35 pmSEA-BSL
15h 45m1 stop
Lufthansa Logo
6:05 am - 2:16 pmBSL-SEA
17h 11m2 stops
$531Lufthansa
Find Deal
Sun, Sep 7 - Wed, Sep 24
Logo
2:55 pm - 7:35 pmSEA-BSL
19h 40m2 stops
Logo
8:25 am - 6:36 pmBSL-SEA
19h 11m2 stops
$532
Find Deal
Sun, Sep 7 - Wed, Sep 24
KLM Logo
5:40 pm - 5:50 pmSEA-BSL
15h 10m1 stop
KLM Logo
10:10 am - 5:40 pmBSL-SEA
16h 30m1 stop
$533KLM
Find Deal
Sun, Sep 7 - Wed, Sep 24
Lufthansa Logo
2:20 pm - 1:40 pmSEA-BSL
14h 20m1 stop
Lufthansa Logo
6:05 am - 2:16 pmBSL-SEA
17h 11m2 stops
$534Lufthansa
Find Deal
Sun, Sep 7 - Wed, Sep 24
Logo
7:15 am - 10:50 amSEA-BSL
18h 35m2 stops
Logo
6:05 am - 2:16 pmBSL-SEA
17h 11m2 stops
$536
Find Deal
Tue, Sep 9 - Wed, Sep 24
KLM Logo
5:40 pm - 9:35 amSEA-BSL
30h 55m1 stop
KLM Logo
6:25 pm - 4:05 pmBSL-SEA
30h 40m1 stop
$553KLM
Find Deal
Mon, Sep 1 - Mon, Sep 15

Delta flights from State of Washington to Basel

Our best Delta deals on State of Washington to Basel flight tickets
Delta
Aug 18
SEA5:40 pmSeattle/Tacoma Intl
15h 10m
1 stop
BSL5:50 pmBasel EuroAirport Swiss
Aug 26
BSL6:15 amBasel EuroAirport Swiss
18h 40m
1 stop
SEA3:55 pmSeattle/Tacoma Intl
$480
Find similar
Delta
Aug 18
SEA5:40 pmSeattle/Tacoma Intl
15h 10m
1 stop
BSL5:50 pmBasel EuroAirport Swiss
Aug 26
BSL6:15 amBasel EuroAirport Swiss
19h 29m
2 stops
SEA4:44 pmSeattle/Tacoma Intl
$490
Find similar
Delta
Aug 17
SEA1:30 pmSeattle/Tacoma Intl
14h 40m
1 stop
BSL1:10 pmBasel EuroAirport Swiss
Aug 24
BSL6:15 amBasel EuroAirport Swiss
18h 40m
1 stop
SEA3:55 pmSeattle/Tacoma Intl
$517
Find similar

United Airlines flights from State of Washington to Basel

Our best United Airlines deals on State of Washington to Basel flight tickets
United Airlines
Sep 3
SEA10:55 amSeattle/Tacoma Intl
16h 30m
2 stops
BSL12:25 pmBasel EuroAirport Swiss
Sep 10
BSL11:25 amBasel EuroAirport Swiss
32h 34m
2 stops
SEA10:59 amSeattle/Tacoma Intl
$543
Find similar
United Airlines
Sep 3
SEA10:55 amSeattle/Tacoma Intl
16h 30m
2 stops
BSL12:25 pmBasel EuroAirport Swiss
Sep 10
BSL9:45 amBasel EuroAirport Swiss
16h 14m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$548
Find similar
United Airlines
Sep 7
SEA2:20 pmSeattle/Tacoma Intl
20h 15m
2 stops
BSL7:35 pmBasel EuroAirport Swiss
Sep 24
BSL11:25 amBasel EuroAirport Swiss
18h 29m
2 stops
SEA8:54 pmSeattle/Tacoma Intl
$567
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 August 6, 2025.
Use the filters below to find and compare flights from Washington to Basel that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/29

7:50 pm-10:05 pm

1 stop18h 15m

Basel EuroAirport Swiss

Mon 11/10

4:00 pm-11:30 am

1 stop28h 30m

$450

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/29

10:32 am-2:55 pm

2 stops20h 23m

Basel EuroAirport Swiss

Mon 11/10

4:00 pm-11:30 am

1 stop28h 30m

$456

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 8/18

5:40 pm-5:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

Tue 8/26

6:15 am-3:55 pm

1 stop18h 40m

$480

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 8/18

5:40 pm-5:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

Tue 8/26

6:15 am-4:44 pm

2 stops19h 29m

$490

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/7

6:50 pm-7:35 pm

1 stop15h 45m

Basel EuroAirport Swiss

Wed 9/24

6:05 am-2:16 pm

2 stops17h 11m

$531

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/7

2:55 pm-7:35 pm

2 stops19h 40m

Basel EuroAirport Swiss

Wed 9/24

8:25 am-6:36 pm

2 stops19h 11m

$532

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/7

5:40 pm-5:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

Wed 9/24

10:10 am-5:40 pm

1 stop16h 30m

$533

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 9/7

2:20 pm-1:40 pm

1 stop14h 20m

Basel EuroAirport Swiss

Wed 9/24

6:05 am-2:16 pm

2 stops17h 11m

$534

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 9/9

7:15 am-10:50 am

2 stops18h 35m

Basel EuroAirport Swiss

Wed 9/24

6:05 am-2:16 pm

2 stops17h 11m

$536

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 9/1

5:40 pm-9:35 am

1 stop30h 55m

Basel EuroAirport Swiss

Mon 9/15

6:25 pm-4:05 pm

1 stop30h 40m

$553

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

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?

If you aren’t able to travel to Basel during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $566.

What is the cheapest day to depart on your flight to Basel?

On average, the least expensive day to fly to Basel from State of Washington is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $561. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Basel is Thursday, with ticket prices averaging around $997.

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

In the morning is the cheapest time of day to fly from State of Washington to Basel when you can find flight prices for as low as $643. Flying to Basel in the morning is an ideal time because this is during off-peak travel hours. Flights to Basel are more costly in the evening, with an average ticket price of $675. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You could potentially save up to 57% on your flight if you consider stops on a State of Washington to Basel flight.

Cheap State of Washington to Basel flight deals and tips

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

Best Price Found

$312

Fastest flight time

11h 30m

Direct flights

None

Airports in Basel

1 airport
The best one-way flight to Basel from State of Washington in the past 72 hours is $312. The best round-trip flight deal from State of Washington to Basel found on momondo in the last 72 hours is $450.
The fastest flight from State of Washington to Basel takes 11h 30m
There are no direct flights from State of Washington to Basel. Popular non-direct routes for this connection are Portland Airport - Basel EuroAirport Swiss and Seattle/Tacoma Intl Airport - Basel EuroAirport Swiss.
There is 1 airport near Basel: Basel EuroAirport Swiss (BSL)
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  • When did momondo last update prices for flights from Washington to Basel?

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

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

  • How old do you have to be to fly from Washington 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 Washington 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.

Best airlines flying from State of Washington to Basel

Compare and see reviews for airlines that fly from State of Washington to Basel with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $443Free CancellationRating
6.6
7,245 reviews
Search British Airways flights
DeltaPriceFrom $513Free CancellationRating
8.0
7,985 reviews
Search Delta flights
LufthansaPriceFrom $571Free CancellationRating
6.8
7,289 reviews
Search Lufthansa flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Basel from Washington.

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

Yes. momondo enables you to select and highlight flights to Basel from Washington with this policy.

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

Once you have performed a search for Washington 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 Washington to Basel right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington to Basel flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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