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Idaho

$249+ Cheap flights from South Dakota to Idaho

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — BOI
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
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Cheap flight deals from South Dakota to Idaho

Keep the following information in mind while searching for South Dakota to Idaho flight deals. Data was last updated August 17, 2025.

Round-trip from

$249
(Delta)

Popular in

December

Cheapest in

January

Average price

$510
From South Dakota to Idaho
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from South Dakota to Idaho

Cheapest flights from South Dakota to Idaho
Explore the most affordable flight options available from South Dakota to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2025.

This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:35 pmFSD - GEG
1 stop8h 11mDelta
Tue 10/141:10 pmGEG - FSD
2 stops7h 47mDelta
Deal found 8/17$256
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:06 pmFSD - GEG
1 stop5h 57mUnited Airlines
Sat 9/201:38 pmGEG - FSD
1 stop4h 51mUnited Airlines
Deal found 8/16$285
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/114:47 pmRAP - GEG
1 stop5h 16mUnited Airlines
Mon 9/155:15 amGEG - RAP
1 stop5h 17mUnited Airlines
Deal found 8/17$296
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:20 amRAP - BOI
1 stop7h 41mDelta
Sun 8/245:30 amBOI - RAP
1 stop8h 15mDelta
Deal found 8/17$324
This Delta deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:01 amFSD - GEG
1 stop7h 04mDelta
Mon 10/272:17 pmGEG - FSD
1 stop6h 40mDelta
Deal found 8/16$329
This American Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:00 amFSD - GEG
1 stop8h 44mAmerican Airlines
Wed 10/16:00 amGEG - FSD
1 stop9h 03mAmerican Airlines
Deal found 8/15$331
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:19 amFSD - GEG
2 stops11h 05mUnited Airlines
Wed 10/11:38 pmGEG - FSD
1 stop7h 37mUnited Airlines
Deal found 8/15$336
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/113:19 pmRAP - GEG
1 stop6h 44mUnited Airlines
Sun 9/215:15 amGEG - RAP
1 stop6h 23mUnited Airlines
Deal found 8/15$345
This American Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/241:33 pmFSD - GEG
1 stop7h 13mAmerican Airlines
Mon 10/271:12 pmGEG - FSD
1 stop7h 30mAmerican Airlines
Deal found 8/17$350
This Kiwi.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/318:30 pmRAP - IDA
1 stop15h 16mAllegiant Air
Thu 9/47:16 pmIDA - RAP
1 stop16h 56mAllegiant Air
Deal found 8/15$353
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/238:01 amFSD - GEG
1 stop7h 04mDelta
Sun 10/265:45 amGEG - FSD
1 stop7h 59mDelta
Deal found 8/17$369
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:47 pmRAP - GEG
1 stop5h 16mUnited Airlines
Tue 9/165:15 amGEG - RAP
1 stop5h 17mUnited Airlines
Deal found 8/17$381

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Dakota to Idaho 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, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2025.
Use the filters below to find and compare flights from South Dakota to Idaho that are best for you.

Fly from

South Dakota

Fly to

Idaho

Route

Depart

Return

Price

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 1/7

6:20 am-2:09 pm

1 stop7h 49m

Boise Air Term. Gowen Fld

Sun 1/11

3:00 pm-10:14 pm

1 stop7h 14m

$249

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Tue 10/7

1:35 pm-7:46 pm

1 stop8h 11m

Spokane

Tue 10/14

1:10 pm-10:57 pm

2 stops7h 47m

$256

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Tue 10/7

1:33 pm-6:46 pm

1 stop7h 13m

Spokane

Tue 10/14

1:12 pm-10:42 pm

1 stop7h 30m

$285

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Sat 9/13

5:06 pm-9:03 pm

1 stop5h 57m

Spokane

Sat 9/20

1:38 pm-8:29 pm

1 stop4h 51m

$285

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 9/11

4:47 pm-9:03 pm

1 stop5h 16m

Spokane

Mon 9/15

5:15 am-11:32 am

1 stop5h 17m

$296

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Fri 10/24

8:01 am-1:05 pm

1 stop7h 04m

Spokane

Mon 10/27

2:17 pm-10:57 pm

1 stop6h 40m

$329

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Sat 9/27

6:00 am-12:44 pm

1 stop8h 44m

Spokane

Wed 10/1

6:00 am-5:03 pm

1 stop9h 03m

$331

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Sat 9/27

11:19 am-8:24 pm

2 stops11h 05m

Spokane

Wed 10/1

1:38 pm-11:15 pm

1 stop7h 37m

$336

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 9/11

3:19 pm-9:03 pm

1 stop6h 44m

Spokane

Sun 9/21

5:15 am-12:38 pm

1 stop6h 23m

$345

Sioux FallsSpokane

FSD - GEG

FSDGEG

Sioux Falls Joe Foss Field

Fri 10/24

1:33 pm-6:46 pm

1 stop7h 13m

Spokane

Mon 10/27

1:12 pm-10:42 pm

1 stop7h 30m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 30 results
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Best time to book a flight from South Dakota to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from South Dakota with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from South Dakota to Idaho

What is the cheapest month to book a flight from South Dakota to Idaho?

Currently, October is the cheapest month in which you can book a flight from South Dakota to Idaho (average of $314). Flying from South Dakota to Idaho in June is currently the most expensive (average of $399). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SD to ID?

Find hourly flight availability from South Dakota to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2025.

When flying from South Dakota to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from South Dakota to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated August 17, 2025.
See what other customers who have flown with Delta and United Airlines from South Dakota to Idaho have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from South Dakota to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from South Dakota to Idaho that include hotel bookings?

    Yes. In addition to deals on South Dakota to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Dakota to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Dakota to Idaho.

  • Can I find deals for business class flights from South Dakota to Idaho?

    Yes. Cheapflights offers flight deals from South Dakota to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Dakota to Idaho?

    Currently, October is the cheapest month in which you can book a flight from South Dakota to Idaho (average of $314). Flying from South Dakota to Idaho in June is currently the most expensive (average of $399). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for South Dakota to Idaho

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Top 2 airlines flying from South Dakota to Idaho

Discover the top 2 airlines that operate flights from South Dakota to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$427FlexibilityNo cancel feeOn-time69%
DeltaCheapest$195Average$289FlexibilityNo cancel feeOn-timeN/A

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