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Cheap flights from Washington to Basel from $408

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 10/21. 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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Find the cheapest flights from Washington to Basel

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
mié., nov. 5 - mié., nov. 12
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
mié., nov. 5 - mié., nov. 12
Air France Logo
2:00 pm - 9:50 amSEA-BSL
34h 50m1 stop
Air France Logo
11:15 am - 11:50 amBSL-SEA
33h 35m1 stop
$490Air France
Find Deal
mié., ene. 7 - mié., ene. 14
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
mié., ene. 7 - mié., ene. 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
mié., ene. 7 - mar., ene. 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
mié., ene. 7 - mar., ene. 13
United Airlines Logo
6:20 am - 9:10 amSEA-BSL
17h 50m2 stops
United Airlines Logo
9:50 am - 10:16 pmBSL-SEA
21h 26m2 stops
$525United Airlines
Find Deal
mié., nov. 5 - mié., 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
mié., ene. 7 - mar., ene. 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
jue., ene. 8 - jue., ene. 15
United Airlines Logo
3:40 pm - 7:40 pmSEA-BSL
19h 00m2 stops
United Airlines Logo
9:50 am - 1:20 pmBSL-SEA
12h 30m1 stop
$549United Airlines
Find Deal
lun., dic. 8 - vie., dic. 26

Delta flights from State of Washington to Basel

Our best Delta deals on State of Washington to Basel flight tickets
Delta
Jan 7
SEA2:00 pmSeattle/Tacoma Intl
34h 50m
1 stop
BSL9:50 amBasel EuroAirport Swiss
Jan 14
BSL10:30 amBasel EuroAirport Swiss
32h 31m
2 stops
SEA10:01 amSeattle/Tacoma Intl
$499
Find similar
Delta
Jan 7
SEA2:00 pmSeattle/Tacoma Intl
34h 50m
1 stop
BSL9:50 amBasel EuroAirport Swiss
Jan 13
BSL11:15 amBasel EuroAirport Swiss
44h 01m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$500
Find similar
Delta
Jan 7
SEA6:00 amSeattle/Tacoma Intl
19h 40m
2 stops
BSL10:40 amBasel EuroAirport Swiss
Jan 14
BSL6:05 amBasel EuroAirport Swiss
19h 09m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$515
Find similar

Air France flights from State of Washington to Basel

Our best Air France deals on State of Washington to Basel flight tickets
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
Air France
Oct 20
SEA1:30 pmSeattle/Tacoma Intl
14h 40m
1 stop
BSL1:10 pmBasel EuroAirport Swiss
Oct 31
BSL6:05 amBasel EuroAirport Swiss
14h 40m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$518
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 septiembre 22, 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

mié. 11/5

8:00 am-7:45 pm

2 stops26h 45m

Basel EuroAirport Swiss

mié. 11/12

9:50 am-1:20 pm

1 stop12h 30m

$462

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 11/5

2:05 pm-1:50 pm

1 stop14h 45m

Basel EuroAirport Swiss

mié. 11/12

6:05 am-11:45 am

1 stop14h 40m

$488

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

mié. 1/14

11:15 am-11:50 am

1 stop33h 35m

$490

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

mié. 1/14

10:30 am-10:01 am

2 stops32h 31m

$499

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

mar. 1/13

11:15 am-10:16 pm

2 stops44h 01m

$500

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/7

2:00 pm-9:50 am

1 stop34h 50m

Basel EuroAirport Swiss

mar. 1/13

2:30 pm-1:20 pm

1 stop31h 50m

$502

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 11/5

6:20 am-9:10 am

2 stops17h 50m

Basel EuroAirport Swiss

mié. 11/12

9:50 am-10:16 pm

2 stops21h 26m

$525

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/7

8:00 am-7:45 pm

2 stops26h 45m

Basel EuroAirport Swiss

mar. 1/13

10:10 am-8:37 pm

2 stops43h 27m

$535

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

jue. 1/8

1:40 pm-1:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

jue. 1/15

11:15 am-11:50 am

1 stop33h 35m

$538

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

lun. 12/8

3:40 pm-7:40 pm

2 stops19h 00m

Basel EuroAirport Swiss

vie. 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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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 46% 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

Direct flights

None
There are no direct flights from State of Washington to Basel. There are no popular flight routes from State of Washington to Basel.
Search flight deals

  • 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 $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?

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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