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 12m 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.

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

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

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 September 2025.

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.

$249 Cheap Flights from South Dakota to Idaho in 2025/26

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Find the cheapest flights from South Dakota to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

4:34 pm - 11:54 pmRAP-BOI

7h 20m1 stop

5:35 am - 2:11 pmBOI-RAP

8h 36m1 stop

$249Delta

Find Deal

Thu, Nov 6 - Sun, Nov 9

6:05 am - 1:05 pmRAP-GEG

8h 00m1 stop

2:17 pm - 10:36 pmGEG-RAP

7h 19m1 stop

$249Delta

Find Deal

Sat, Nov 1 - Tue, Nov 4

9:56 am - 3:10 pmRAP-GEG

6h 14m1 stop

5:05 am - 10:57 amGEG-RAP

4h 52m1 stop

$259United Airlines

Find Deal

Wed, Oct 8 - Sun, Oct 12

2:35 pm - 7:58 pmFSD-BOI

6h 23m1 stop

2:09 pm - 11:39 pmBOI-FSD

8h 30m1 stop

$274American Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

5:21 pm - 9:16 pmFSD-BOI

4h 55m1 stop

1:50 pm - 11:43 pmBOI-FSD

8h 53m2 stops

$283United Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

10:03 am - 6:48 pmRAP-GEG

9h 45m1 stop

6:13 pm - 6:26 pmGEG-RAP

23h 13m1 stop

$323Allegiant Air

Find Deal

Fri, Oct 31 - Fri, Nov 7

5:05 pm - 10:24 pmFSD-BOI

6h 19m1 stop

1:35 pm - 9:15 pmBOI-FSD

6h 40m1 stop

$339American Airlines

Find Deal

Fri, Oct 24 - Mon, Oct 27

11:37 am - 8:11 amFSD-BOI

21h 34m1 stop

9:22 pm - 12:41 pmBOI-FSD

14h 19m1 stop

$567Allegiant Air

Find Deal

Tue, Nov 25 - Sun, Nov 30

11:37 am - 8:11 amFSD-BOI

21h 34m1 stop

6:47 pm - 12:41 pmBOI-FSD

40h 54m2 stops

$746Multiple Airlines

Find Deal

Tue, Nov 25 - Sat, Nov 29

11:37 am - 8:11 amFSD-BOI

21h 34m1 stop

3:19 pm - 12:41 pmBOI-FSD

20h 22m2 stops

$771Multiple Airlines

Find Deal

Tue, Nov 25 - Sun, Nov 30

United Airlines flights from South Dakota to Idaho

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

United Airlines

Oct 8

RAP9:56 amRapid City

6h 14m

1 stop

GEG3:10 pmSpokane

Oct 12

GEG5:05 amSpokane

4h 52m

1 stop

RAP10:57 amRapid City

$259

Find similar

United Airlines

Dec 5

FSD5:21 pmSioux Falls Joe Foss Field

4h 55m

1 stop

BOI9:16 pmBoise Air Term. Gowen Fld

Dec 8

BOI1:50 pmBoise Air Term. Gowen Fld

8h 53m

2 stops

FSD11:43 pmSioux Falls Joe Foss Field

$283

Find similar

United Airlines

Mar 3

RAP7:05 amRapid City

6h 34m

1 stop

BOI1:39 pmBoise Air Term. Gowen Fld

Mar 7

BOI2:43 pmBoise Air Term. Gowen Fld

5h 50m

1 stop

RAP8:33 pmRapid City

$319

Find similar

Delta flights from South Dakota to Idaho

Our best Delta deals on South Dakota to Idaho flight tickets

Delta

Nov 6

RAP4:34 pmRapid City

7h 20m

1 stop

BOI11:54 pmBoise Air Term. Gowen Fld

Nov 9

BOI5:35 amBoise Air Term. Gowen Fld

8h 36m

1 stop

RAP2:11 pmRapid City

$249

Find similar

Delta

Nov 1

FSD4:24 pmSioux Falls Joe Foss Field

5h 22m

1 stop

GEG7:46 pmSpokane

Nov 4

GEG2:17 pmSpokane

6h 40m

1 stop

FSD10:57 pmSioux Falls Joe Foss Field

$251

Find similar

Delta

Oct 21

RAP6:05 amRapid City

10h 48m

2 stops

GEG3:53 pmSpokane

Oct 27

GEG5:45 amSpokane

7h 00m

1 stop

RAP1:45 pmRapid City

$254

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Thu 11/6

4:34 pm-11:54 pm

1 stop7h 20m

Boise Air Term. Gowen Fld

Sun 11/9

5:35 am-2:11 pm

1 stop8h 36m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Sat 11/1

6:05 am-1:05 pm

1 stop8h 00m

Spokane

Tue 11/4

2:17 pm-10:36 pm

1 stop7h 19m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Wed 10/8

9:56 am-3:10 pm

1 stop6h 14m

Spokane

Sun 10/12

5:05 am-10:57 am

1 stop4h 52m

$259

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Fri 12/5

2:35 pm-7:58 pm

1 stop6h 23m

Boise Air Term. Gowen Fld

Mon 12/8

2:09 pm-11:39 pm

1 stop8h 30m

$274

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Fri 12/5

5:21 pm-9:16 pm

1 stop4h 55m

Boise Air Term. Gowen Fld

Mon 12/8

1:50 pm-11:43 pm

2 stops8h 53m

$283

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Fri 10/31

10:03 am-6:48 pm

1 stop9h 45m

Spokane

Fri 11/7

6:13 pm-6:26 pm

1 stop23h 13m

$323

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Fri 10/24

5:05 pm-10:24 pm

1 stop6h 19m

Boise Air Term. Gowen Fld

Mon 10/27

1:35 pm-9:15 pm

1 stop6h 40m

$339

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Tue 11/25

11:37 am-8:11 am

1 stop21h 34m

Boise Air Term. Gowen Fld

Sun 11/30

9:22 pm-12:41 pm

1 stop14h 19m

$567

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Tue 11/25

11:37 am-8:11 am

1 stop21h 34m

Boise Air Term. Gowen Fld

Sat 11/29

6:47 pm-12:41 pm

2 stops40h 54m

$746

Sioux FallsBoise

FSD - BOI

FSDBOI

Sioux Falls Joe Foss Field

Tue 11/25

11:37 am-8:11 am

1 stop21h 34m

Boise Air Term. Gowen Fld

Sun 11/30

3:19 pm-12:41 pm

2 stops20h 22m

$771

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, January 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 $283. If you don’t want to visit Idaho in January, then you should wait until April to fly from South Dakota, when ticket prices are also cheap, with an average price of $328.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Saturday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $354. On the other hand, Sunday is the most expensive day to depart from South Dakota because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $510.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is in the evening. momondo users have found flights departing from South Dakota to Idaho in the evening for as low as $321. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. At noon is when there is more demand to fly to Idaho, so prices are often more expensive at around $484 per ticket.

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

Direct flights	None

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 September 2025.
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 $182	Free Cancellation	Rating 7.4 8,928 reviews		Search United Airlines flights
Delta	PriceFrom $243	Free Cancellation	Rating 7.9 7,973 reviews		Search Delta 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.