What is the cheapest airline that flies from Idaho to South Dakota?

Allegiant Air, United Airlines, and Delta are the most popular carriers operating from Idaho to South Dakota

How long is the flight from Idaho to South Dakota?

The flight from Idaho to South Dakota depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Idaho Falls (a popular airport in Idaho) to Rapid City (the most popular airport in South Dakota), then the flight time is 4h 14m on average. If you fly from Boise (another popular airport in Idaho) to Rapid City, then the average flight time is 4h 20m.

What airlines fly to South Dakota?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to South Dakota from Idaho according to our data. United Airlines is the first choice among our users, with 72% of people opting to fly with this airline when traveling to South Dakota. Keep in mind that there are 3 different airlines that fly to South Dakota on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Idaho to South Dakota?

Prices for flights from Idaho to South Dakota refresh daily.

How many operators does momondo search for flights from Idaho to South Dakota?

There are 3 operators available for flights from Idaho to South Dakota as of May 2026.

How old do you have to be to fly from Idaho to South Dakota?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to South Dakota.

What documentation or ID do you need to fly to South Dakota?

The required travel and health documents for your South Dakota trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at South Dakota. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$168 Cheap Flights from Idaho to South Dakota in 2026

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Find the cheapest flights from Idaho to South Dakota

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:25 pm - 10:46 pm

BOI

FSD

6h 21m

1 stop

8:15 am - 2:03 pm

FSD

BOI

6h 48m

1 stop

$319Delta

Sat, Sep 12 - Tue, Sep 15

3:25 pm - 10:46 pm

BOI

FSD

6h 21m

1 stop

4:09 pm - 11:56 pm

FSD

BOI

8h 47m

2 stops

$324Delta

Sat, Sep 12 - Tue, Sep 15

7:20 pm - 10:05 am

GEG

FSD

12h 45m

2 stops

4:09 pm - 7:27 pm

FSD

GEG

5h 18m

1 stop

$324Delta

Fri, Oct 23 - Tue, Nov 10

7:20 pm - 10:05 am

GEG

FSD

12h 45m

2 stops

4:09 pm - 10:48 pm

FSD

GEG

8h 39m

2 stops

$329Delta

Fri, Oct 23 - Tue, Nov 10

5:46 pm - 10:25 pm

BOI

RAP

4h 39m

1 stop

5:00 am - 9:45 am

RAP

BOI

4h 45m

1 stop

$333United Airlines

Thu, Jun 11 - Wed, Jun 17

5:46 pm - 10:33 pm

BOI

RAP

4h 47m

1 stop

5:00 am - 9:45 am

RAP

BOI

4h 45m

1 stop

$339United Airlines

Sat, May 30 - Wed, Jun 3

2:53 pm - 10:51 pm

BOI

FSD

6h 58m

1 stop

8:22 am - 1:42 pm

FSD

BOI

6h 20m

1 stop

$349Delta

Fri, Aug 21 - Mon, Aug 24

3:10 pm - 12:18 am

BOI

FSD

8h 08m

1 stop

5:34 pm - 11:22 pm

FSD

BOI

6h 48m

1 stop

$390American Airlines

Wed, Jul 8 - Wed, Jul 15

11:58 am - 9:15 am

GEG

RAP

20h 17m

1 stop

9:50 pm - 11:37 am

RAP

GEG

14h 47m

2 stops

$472Multiple Airlines

Fri, Jul 3 - Sun, Jul 5

11:57 am - 11:44 am

GEG

RAP

22h 47m

1 stop

9:54 pm - 11:36 am

RAP

GEG

14h 42m

2 stops

$491Multiple Airlines

Fri, Jun 12 - Thu, Jun 18

United Airlines flights from Idaho to South Dakota

Our best United Airlines deals on Idaho to South Dakota flight tickets

United Airlines

Jun 11

BOI5:46 pmBoise Air Term. Gowen Fld

4h 39m

1 stop

RAP10:25 pmRapid City

Jun 17

RAP5:00 amRapid City

4h 45m

1 stop

BOI9:45 amBoise Air Term. Gowen Fld

$333

United Airlines

May 30

BOI5:46 pmBoise Air Term. Gowen Fld

4h 47m

1 stop

RAP10:33 pmRapid City

Jun 3

RAP5:00 amRapid City

4h 45m

1 stop

BOI9:45 amBoise Air Term. Gowen Fld

$339

United Airlines

Oct 9

BOI2:31 pmBoise Air Term. Gowen Fld

4h 31m

1 stop

FSD8:02 pmSioux Falls Joe Foss Field

Oct 24

FSD5:05 pmSioux Falls Joe Foss Field

5h 26m

1 stop

BOI9:31 pmBoise Air Term. Gowen Fld

$352

Delta flights from Idaho to South Dakota

Our best Delta deals on Idaho to South Dakota flight tickets

Delta

Sep 12

BOI3:25 pmBoise Air Term. Gowen Fld

6h 21m

1 stop

FSD10:46 pmSioux Falls Joe Foss Field

Sep 15

FSD8:15 amSioux Falls Joe Foss Field

6h 48m

1 stop

BOI2:03 pmBoise Air Term. Gowen Fld

$319

Delta

Oct 23

GEG7:20 pmSpokane

12h 45m

2 stops

FSD10:05 amSioux Falls Joe Foss Field

Nov 10

FSD4:09 pmSioux Falls Joe Foss Field

5h 18m

1 stop

GEG7:27 pmSpokane

$324

Delta

Oct 23

GEG7:20 pmSpokane

12h 45m

2 stops

FSD10:05 amSioux Falls Joe Foss Field

Nov 10

FSD4:09 pmSioux Falls Joe Foss Field

8h 39m

2 stops

GEG10:48 pmSpokane

$329

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Sat 9/12

3:25 pm-10:46 pm

1 stop6h 21m

Sioux Falls Joe Foss Field

Tue 9/15

8:15 am-2:03 pm

1 stop6h 48m

$319

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Sat 9/12

3:25 pm-10:46 pm

1 stop6h 21m

Sioux Falls Joe Foss Field

Tue 9/15

4:09 pm-11:56 pm

2 stops8h 47m

$324

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 10/23

7:20 pm-10:05 am

2 stops12h 45m

Sioux Falls Joe Foss Field

Tue 11/10

4:09 pm-7:27 pm

1 stop5h 18m

$324

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 10/23

7:20 pm-10:05 am

2 stops12h 45m

Sioux Falls Joe Foss Field

Tue 11/10

4:09 pm-10:48 pm

2 stops8h 39m

$329

Quickest round-trip

BoiseRapid City

BOI - RAP

BOIRAP

Boise Air Term. Gowen Fld

Thu 6/11

5:46 pm-10:25 pm

1 stop4h 39m

Rapid City

Wed 6/17

5:00 am-9:45 am

1 stop4h 45m

$333

BoiseRapid City

BOI - RAP

BOIRAP

Boise Air Term. Gowen Fld

Sat 5/30

5:46 pm-10:33 pm

1 stop4h 47m

Rapid City

Wed 6/3

5:00 am-9:45 am

1 stop4h 45m

$339

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Fri 8/21

2:53 pm-10:51 pm

1 stop6h 58m

Sioux Falls Joe Foss Field

Mon 8/24

8:22 am-1:42 pm

1 stop6h 20m

$349

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Wed 7/8

3:10 pm-12:18 am

1 stop8h 08m

Sioux Falls Joe Foss Field

Wed 7/15

5:34 pm-11:22 pm

1 stop6h 48m

$390

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Fri 7/3

11:58 am-9:15 am

1 stop20h 17m

Rapid City

Sun 7/5

9:50 pm-11:37 am

2 stops14h 47m

$472

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Fri 6/12

11:57 am-11:44 am

1 stop22h 47m

Rapid City

Thu 6/18

9:54 pm-11:36 am

2 stops14h 42m

$491

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to South Dakota

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

Prices

Airlines

Other information

What is the cheapest month to fly to South Dakota?

The month of March is, on average, the cheapest month to fly to South Dakota from Idaho, with most prices found around $224. If you aren’t able to travel to South Dakota during the month of March, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $248.

Can stopping save me money on Idaho to South Dakota flights?

You could potentially save up to 36% on your flight if you consider stops on a Idaho to South Dakota flight.

Cheap Idaho to South Dakota flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to South Dakota

Fastest flight time	4h 14m
Direct flights	None

The fastest flight from Idaho to South Dakota takes 4h 14m

There are no direct flights from Idaho to South Dakota. There are no popular flight routes from Idaho to South Dakota.

Search flight deals

Frequently asked questions about flying from Idaho to South Dakota

When did momondo last update prices for flights from Idaho to South Dakota?
Prices for flights from Idaho to South Dakota refresh daily.
How many operators does momondo search for flights from Idaho to South Dakota?
There are 3 operators available for flights from Idaho to South Dakota as of May 2026.
How old do you have to be to fly from Idaho to South Dakota?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to South Dakota.
What documentation or ID do you need to fly to South Dakota?
The required travel and health documents for your South Dakota trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at South Dakota. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to South Dakota

Compare and see reviews for airlines that fly from Idaho to South Dakota with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $250	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
Delta	PriceFrom $250	Free Cancellation	Rating 7.9 8,455 reviews	Search Delta flights
United Airlines	PriceFrom $280	Free Cancellation	Rating 7.4 9,726 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to South Dakota?

It is quick and easy to find Idaho to South Dakota 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 South Dakota that suits you.

Can I find flights from Idaho to South Dakota with flexible booking policies on momondo?

Flights from Idaho to South Dakota 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 Idaho to South Dakota?

momondo provides multiple filters to help you find the best flight to South Dakota from Idaho. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Idaho to South Dakota right now. Can momondo alert me if prices change?

If you are simply researching potential flights to South Dakota, momondo offers a useful price alert feature which will track prices for flights to South Dakota from Idaho and alert you when they change.