Earn point on your loyalty program!arrow arc left

Cheap flights from Sioux Falls (FSD) to Seattle (BFI)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)

How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Sioux Falls to Seattle in January , February 2026

25 Jan - 06 Feb $ 1,035.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
3 STOPS
FSD
Sioux Falls
Pick dates
25 Jan - 27 Feb $ 1,059.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
2 STOPS
FSD
Sioux Falls
Pick dates
29 Jan - 27 Feb $ 1,072.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
2 STOPS
FSD
Sioux Falls
Pick dates

Last minute flights from Sioux Falls to Seattle

25 Jan - 02 Feb $ 1,055.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
3 STOPS
FSD
Sioux Falls
Pick dates
29 Jan - 02 Feb $ 1,068.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
3 STOPS
FSD
Sioux Falls
Pick dates
22 Jan - 02 Feb $ 1,129.00
FSD
Sioux Falls
Allegiant Air
2 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
3 STOPS
FSD
Sioux Falls
Pick dates

One-way flights to Seattle from Sioux Falls

11:43 AM - 2:45 PM
Air Excursions
2 Stops
29h 52m
FSD - BFI
$ 493
Kiwi
Pick dates
11:43 AM - 2:45 PM
Air Excursions
2 Stops
29h 52m
FSD - BFI
$ 506
Kiwi
Pick dates
11:43 AM - 2:45 PM
Air Excursions
2 Stops
29h 52m
FSD - BFI
$ 567
Kiwi
Pick dates

How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Sioux Falls (FSD) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.