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

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

What airlines fly to Idaho?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Idaho from South Dakota 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 Idaho. Keep in mind that there are 3 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

How long is the flight from South Dakota to Idaho?

Flight times from South Dakota to Idaho vary, but if you’re flying out of Rapid City and flying into Boise (one of the most popular routes), then the duration is 4h 35m on average. Another popular route from South Dakota to Idaho is flying from Sioux Falls to Boise, which will take roughly 4h 42m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from South Dakota to Idaho are updated daily.

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

The number of operators available for flights from South Dakota to Idaho is 3 as of March 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Dakota to Idaho.

What documentation or ID do you need to fly to Idaho?

The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$146 Cheap Flights from South Dakota to Idaho in 2026

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Find the cheapest flights from South Dakota to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:05 am - 12:40 pm

FSD

GEG

5h 35m

1 stop

4:10 pm - 11:43 pm

GEG

FSD

5h 33m

1 stop

$291United Airlines

Tue, Apr 28 - Tue, May 5

4:57 pm - 9:11 pm

FSD

GEG

6h 14m

1 stop

6:00 am - 8:20 pm

GEG

FSD

12h 20m

2 stops

$296United Airlines

Tue, Apr 28 - Tue, May 5

9:05 am - 9:34 pm

FSD

GEG

14h 29m

2 stops

6:00 am - 8:20 pm

GEG

FSD

12h 20m

2 stops

$301United Airlines

Tue, Apr 28 - Tue, May 5

4:57 pm - 10:35 pm

FSD

BOI

6h 38m

1 stop

5:00 am - 10:29 am

BOI

FSD

4h 29m

1 stop

$315United Airlines

Wed, Apr 22 - Sun, Apr 26

6:00 am - 9:44 am

FSD

JAC

4h 44m

1 stop

2:35 pm - 8:30 pm

JAC

FSD

4h 55m

1 stop

$329United Airlines

Sat, Apr 18 - Mon, Apr 20

5:00 am - 9:45 am

RAP

BOI

4h 45m

1 stop

5:46 pm - 10:25 pm

BOI

RAP

4h 39m

1 stop

$329United Airlines

Sat, May 23 - Wed, May 27

4:17 pm - 8:29 pm

FSD

BOI

5h 12m

1 stop

5:34 am - 1:03 pm

BOI

FSD

6h 29m

1 stop

$330Delta

Tue, Apr 14 - Tue, Apr 21

1:44 pm - 12:20 am

FSD

GEG

12h 36m

2 stops

12:52 pm - 11:40 pm

GEG

FSD

8h 48m

1 stop

$335Delta

Wed, Apr 15 - Sat, Apr 18

4:17 pm - 11:57 pm

FSD

BOI

8h 40m

2 stops

5:34 am - 1:03 pm

BOI

FSD

6h 29m

1 stop

$335Delta

Tue, Apr 14 - Tue, Apr 21

7:19 am - 11:40 am

FSD

GEG

6h 21m

1 stop

3:50 pm - 11:52 pm

GEG

FSD

6h 02m

1 stop

$339American Airlines

Thu, Sep 17 - Mon, Sep 21

Delta flights from South Dakota to Idaho

Our best Delta deals on South Dakota to Idaho flight tickets

Delta

Apr 14

FSD4:17 pmSioux Falls Joe Foss Field

5h 12m

1 stop

BOI8:29 pmBoise Air Term. Gowen Fld

Apr 21

BOI5:34 amBoise Air Term. Gowen Fld

6h 29m

1 stop

FSD1:03 pmSioux Falls Joe Foss Field

$330

Delta

Apr 14

FSD4:17 pmSioux Falls Joe Foss Field

8h 40m

2 stops

BOI11:57 pmBoise Air Term. Gowen Fld

Apr 21

BOI5:34 amBoise Air Term. Gowen Fld

6h 29m

1 stop

FSD1:03 pmSioux Falls Joe Foss Field

$335

Delta

Apr 15

FSD1:44 pmSioux Falls Joe Foss Field

11h 31m

2 stops

GEG11:15 pmSpokane

Apr 18

GEG1:07 pmSpokane

7h 55m

2 stops

FSD11:02 pmSioux Falls Joe Foss Field

$341

United Airlines flights from South Dakota to Idaho

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

United Airlines

Apr 28

FSD9:05 amSioux Falls Joe Foss Field

5h 35m

1 stop

GEG12:40 pmSpokane

May 5

GEG4:10 pmSpokane

5h 33m

1 stop

FSD11:43 pmSioux Falls Joe Foss Field

$291

United Airlines

Apr 28

FSD4:57 pmSioux Falls Joe Foss Field

6h 14m

1 stop

GEG9:11 pmSpokane

May 5

GEG6:00 amSpokane

12h 20m

2 stops

FSD8:20 pmSioux Falls Joe Foss Field

$296

United Airlines

Apr 28

FSD9:05 amSioux Falls Joe Foss Field

14h 29m

2 stops

GEG9:34 pmSpokane

May 5

GEG6:00 amSpokane

12h 20m

2 stops

FSD8:20 pmSioux Falls Joe Foss Field

$301

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Tue 4/28

9:05 am-12:40 pm

1 stop5h 35m

Spokane

Tue 5/5

4:10 pm-11:43 pm

1 stop5h 33m

$291

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Tue 4/28

4:57 pm-9:11 pm

1 stop6h 14m

Spokane

Tue 5/5

6:00 am-8:20 pm

2 stops12h 20m

$296

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Tue 4/28

9:05 am-9:34 pm

2 stops14h 29m

Spokane

Tue 5/5

6:00 am-8:20 pm

2 stops12h 20m

$301

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Wed 4/22

4:57 pm-10:35 pm

1 stop6h 38m

Boise Air Term. Gowen Fld

Sun 4/26

5:00 am-10:29 am

1 stop4h 29m

$315

Sioux FallsJackson

FSD - JAC

FSDJAC

Sioux Falls Joe Foss Field

Sat 4/18

6:00 am-9:44 am

1 stop4h 44m

Jackson Hole

Mon 4/20

2:35 pm-8:30 pm

1 stop4h 55m

$329

Quickest round-trip

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sat 5/23

5:00 am-9:45 am

1 stop4h 45m

Boise Air Term. Gowen Fld

Wed 5/27

5:46 pm-10:25 pm

1 stop4h 39m

$329

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Tue 4/14

4:17 pm-8:29 pm

1 stop5h 12m

Boise Air Term. Gowen Fld

Tue 4/21

5:34 am-1:03 pm

1 stop6h 29m

$330

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Wed 4/15

1:44 pm-12:20 am

2 stops12h 36m

Spokane

Sat 4/18

12:52 pm-11:40 pm

1 stop8h 48m

$335

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Tue 4/14

4:17 pm-11:57 pm

2 stops8h 40m

Boise Air Term. Gowen Fld

Tue 4/21

5:34 am-1:03 pm

1 stop6h 29m

$335

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Thu 9/17

7:19 am-11:40 am

1 stop6h 21m

Spokane

Mon 9/21

3:50 pm-11:52 pm

1 stop6h 02m

$339

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 South Dakota to Idaho

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 Idaho?

In general, June is the cheapest month to fly from South Dakota to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $278. If you don’t want to visit Idaho in June, then you should wait until April to fly from South Dakota, when ticket prices are also cheap, with an average price of $323.

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

You could potentially save up to 11% on your flight if you consider stops on a South Dakota to Idaho flight.

Cheap South Dakota to Idaho flight deals and tips

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

Fastest flight time	4h 35m
Direct flights	None

The fastest flight from South Dakota to Idaho takes 4h 35m

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

Search flight deals

When did momondo last update prices for flights from South Dakota to Idaho?
Prices for flights from South Dakota to Idaho are updated daily.
How many operators does momondo search for flights from South Dakota to Idaho?
The number of operators available for flights from South Dakota to Idaho is 3 as of March 2026.
How old do you have to be to fly from South Dakota to Idaho?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Dakota to Idaho.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from South Dakota to Idaho

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $152	Free Cancellation	Rating 7.4 9,514 reviews	Search United Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.9 8,359 reviews	Search Delta flights
American Airlines	PriceFrom $334	Free Cancellation	Rating 7.1 11,530 reviews	Search American Airlines flights

Why use momondo?

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

Finding the right flight to Idaho from South Dakota is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho quick and easy, saving you time and money.

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

All flight searches from South Dakota to Idaho on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from South Dakota to Idaho?

Once you have performed a search for South Dakota to Idaho 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 South Dakota to Idaho right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho from South Dakota 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.