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Cheap flights from Seattle to Basel from $387

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 12/2. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
2:10 pm - 9:50 amSEA-BSL
34h 40m1 stop
Delta Logo
11:15 am - 11:50 amBSL-SEA
33h 35m1 stop
$483Delta
Find Deal
mié., ene. 14 - dom., ene. 18
Lufthansa Logo
3:10 pm - 7:40 pmSEA-BSL
19h 30m1 stop
Lufthansa Logo
9:50 am - 7:16 pmBSL-SEA
18h 26m2 stops
$484Lufthansa
Find Deal
mié., ene. 14 - dom., ene. 18
Delta Logo
9:59 pm - 1:50 pmSEA-BSL
30h 51m2 stops
Delta Logo
11:15 am - 3:28 pmBSL-SEA
37h 13m2 stops
$496Delta
Find Deal
mié., ene. 14 - dom., ene. 18
British Airways Logo
6:50 pm - 5:05 pmSEA-BSL
13h 15m1 stop
British Airways Logo
7:00 am - 12:30 pmBSL-SEA
13h 30m1 stop
$499British Airways
Find Deal
vie., mar. 6 - mar., mar. 17
Multiple Airlines Logo
8:10 am - 6:30 pmSEA-BSL
25h 20m2 stops
Multiple Airlines Logo
6:45 am - 10:16 pmBSL-SEA
24h 31m2 stops
$506Multiple Airlines
Find Deal
mar., dic. 2 - mié., dic. 10
Air France Logo
3:10 pm - 10:40 amSEA-BSL
34h 30m1 stop
Air France Logo
6:05 am - 11:50 amBSL-SEA
14h 45m1 stop
$518Air France
Find Deal
vie., ene. 2 - vie., ene. 9
Delta Logo
1:40 pm - 1:50 pmSEA-BSL
15h 10m1 stop
Delta Logo
11:15 am - 11:50 amBSL-SEA
33h 35m1 stop
$581Delta
Find Deal
mar., dic. 2 - mié., dic. 10
United Airlines Logo
3:25 pm - 7:40 pmSEA-BSL
19h 15m2 stops
United Airlines Logo
9:50 am - 1:20 pmBSL-SEA
12h 30m1 stop
$586United Airlines
Find Deal
mar., dic. 2 - vie., dic. 12
Delta Logo
7:20 am - 10:40 amSEA-BSL
18h 20m2 stops
Delta Logo
11:15 am - 11:50 amBSL-SEA
33h 35m1 stop
$592Delta
Find Deal
mié., dic. 3 - mié., dic. 10
United Airlines Logo
1:05 pm - 7:40 pmSEA-BSL
21h 35m2 stops
United Airlines Logo
9:50 am - 12:50 amBSL-SEA
24h 00m3 stops
$593United Airlines
Find Deal
mar., dic. 2 - jue., dic. 11

Air France flights from Seattle to Basel

Our best Air France deals on Seattle to Basel flight tickets
Air France
Jan 2
SEA3:10 pmSeattle/Tacoma Intl
34h 30m
1 stop
BSL10:40 amBasel EuroAirport Swiss
Jan 9
BSL6:05 amBasel EuroAirport Swiss
14h 45m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$518
Find similar
Air France
Nov 23
SEA3:00 pmSeattle/Tacoma Intl
22h 05m
1 stop
BSL10:05 pmBasel EuroAirport Swiss
Dec 1
BSL5:55 pmBasel EuroAirport Swiss
26h 55m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$645
Find similar
Air France
Nov 21
SEA3:00 pmSeattle/Tacoma Intl
34h 40m
1 stop
BSL10:40 amBasel EuroAirport Swiss
Dec 1
BSL5:55 pmBasel EuroAirport Swiss
26h 55m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$742
Find similar

Delta flights from Seattle to Basel

Our best Delta deals on Seattle to Basel flight tickets
Delta
Jan 14
SEA2:10 pmSeattle/Tacoma Intl
34h 40m
1 stop
BSL9:50 amBasel EuroAirport Swiss
Jan 18
BSL11:15 amBasel EuroAirport Swiss
33h 35m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$483
Find similar
Delta
Jan 14
SEA9:59 pmSeattle/Tacoma Intl
30h 51m
2 stops
BSL1:50 pmBasel EuroAirport Swiss
Jan 18
BSL11:15 amBasel EuroAirport Swiss
37h 13m
2 stops
SEA3:28 pmSeattle/Tacoma Intl
$496
Find similar
Delta
Dec 2
SEA1:40 pmSeattle/Tacoma Intl
15h 10m
1 stop
BSL1:50 pmBasel EuroAirport Swiss
Dec 10
BSL11:15 amBasel EuroAirport Swiss
33h 35m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$581
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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 noviembre 19, 2025.
Use the filters below to find and compare flights from Seattle to Basel that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/14

2:10 pm-9:50 am

1 stop34h 40m

Basel EuroAirport Swiss

dom. 1/18

11:15 am-11:50 am

1 stop33h 35m

$483

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/14

3:10 pm-7:40 pm

1 stop19h 30m

Basel EuroAirport Swiss

dom. 1/18

9:50 am-7:16 pm

2 stops18h 26m

$484

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 1/14

9:59 pm-1:50 pm

2 stops30h 51m

Basel EuroAirport Swiss

dom. 1/18

11:15 am-3:28 pm

2 stops37h 13m

$496

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

vie. 3/6

6:50 pm-5:05 pm

1 stop13h 15m

Basel EuroAirport Swiss

mar. 3/17

7:00 am-12:30 pm

1 stop13h 30m

$499

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mar. 12/2

8:10 am-6:30 pm

2 stops25h 20m

Basel EuroAirport Swiss

mié. 12/10

6:45 am-10:16 pm

2 stops24h 31m

$506

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

vie. 1/2

3:10 pm-10:40 am

1 stop34h 30m

Basel EuroAirport Swiss

vie. 1/9

6:05 am-11:50 am

1 stop14h 45m

$518

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mar. 12/2

1:40 pm-1:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

mié. 12/10

11:15 am-11:50 am

1 stop33h 35m

$581

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mar. 12/2

3:25 pm-7:40 pm

2 stops19h 15m

Basel EuroAirport Swiss

vie. 12/12

9:50 am-1:20 pm

1 stop12h 30m

$586

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 12/3

7:20 am-10:40 am

2 stops18h 20m

Basel EuroAirport Swiss

mié. 12/10

11:15 am-11:50 am

1 stop33h 35m

$592

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mar. 12/2

1:05 pm-7:40 pm

2 stops21h 35m

Basel EuroAirport Swiss

jue. 12/11

9:50 am-12:50 am

3 stops24h 00m

$593

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

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 typical price of a round-trip flight between Seattle and Basel?

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 Seattle 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 Seattle 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 Seattle to Basel flights?

You could potentially save up to 28% on your flight if you consider stops on a Seattle to Basel flight.

When to book flights from Seattle to Basel

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

Cheap Seattle to Basel (SEA to EAP) flight deals and tips

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

Direct flights

None
There are no direct flights from Seattle to Basel. There are no popular flight routes from Seattle to Basel.
Search flight deals

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

    A flight from Seattle/Tacoma Intl to Basel will travel around 5202.0 mi. Typically, this will take 13h 15m by plane in normal conditions.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Basel are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Basel?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport 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.

  • What is the most popular airline from Seattle to Basel?

Best airlines flying from Seattle to Basel

Compare and see reviews for airlines that fly from Seattle to Basel with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $481Free CancellationRating
6.7
7,534 reviews
Search British Airways flights
LufthansaPriceFrom $497Free CancellationRating
6.8
7,579 reviews
Search Lufthansa flights

Why use momondo?

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

It is quick and easy to find Seattle to Basel flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Basel that suits you.

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

Yes. All flights to Basel from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

Price alerts on flights to Basel from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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