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South Dakota

$126+ Cheap flights from Idaho to South Dakota

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — FSD
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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Cheap flight deals from Idaho to South Dakota

Keep the following information in mind while searching for Idaho to South Dakota flight deals. Data was last updated June 18, 2025.

Round-trip from

$244
(Delta)

One-way from

$126
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$345
From Idaho to South Dakota
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One-way flight from Idaho to South Dakota
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Highest demand for flights based on searches. 14% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Idaho to South Dakota

Cheapest flights from Idaho to South Dakota
Explore the most affordable flight options available from Idaho to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2025.

This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/412:29 pmGEG - FSD
1 stop8h 41mDelta
Sun 7/67:59 pmFSD - GEG
1 stop5h 12mDelta
Deal found 6/15$244
This United Airlines deal was found by Cheapflights users on 6/18. 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 11/142:31 pmBOI - RAP
1 stop4h 12mUnited Airlines
Sat 11/225:15 amRAP - BOI
1 stop4h 43mUnited Airlines
Deal found 6/18$249
This United Airlines deal was found by Cheapflights users on 6/18. 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 7/34:07 pmJAC - RAP
1 stop4h 40mUnited Airlines
Mon 7/77:00 amRAP - JAC
1 stop5h 50mUnited Airlines
Deal found 6/18$269
This Delta deal was found by Cheapflights users on 6/17. 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.
Fri 8/153:06 pmBOI - RAP
1 stop7h 25mDelta
Mon 8/186:20 amRAP - BOI
1 stop7h 41mDelta
Deal found 6/17$289
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/132:05 pmGEG - RAP
1 stop7h 05mDelta
Sat 9/206:20 amRAP - GEG
2 stops10h 47mDelta
Deal found 6/15$294
This Delta deal was found by Cheapflights users on 6/18. 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 7/93:17 pmBOI - FSD
1 stop7h 27mDelta
Mon 7/146:16 pmFSD - BOI
2 stops6h 53mDelta
Deal found 6/18$294
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Fri 7/44:13 pmIDA - RAP
1 stop4h 43mUnited Airlines
Fri 7/115:59 pmRAP - IDA
1 stop4h 52mUnited Airlines
Deal found 6/16$294
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Tue 7/15:42 pmBOI - FSD
1 stop4h 55mUnited Airlines
Sat 7/56:00 amFSD - BOI
1 stop4h 52mUnited Airlines
Deal found 6/16$325
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Fri 7/41:37 pmGEG - FSD
1 stop4h 43mUnited Airlines
Fri 7/115:10 pmFSD - GEG
1 stop5h 53mUnited Airlines
Deal found 6/15$339
This American Airlines deal was found by Cheapflights users on 6/15. 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.
Thu 7/31:51 pmGEG - FSD
1 stop8h 07mAmerican Airlines
Thu 7/105:11 pmFSD - GEG
1 stop8h 17mAmerican Airlines
Deal found 6/15$354
This American Airlines deal was found by Cheapflights users on 6/17. 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.
Tue 7/156:49 amBOI - RAP
2 stops14h 17mAmerican Airlines
Tue 7/225:36 amRAP - BOI
2 stops11h 11mAmerican Airlines
Deal found 6/17$400
This United Airlines deal was found by Cheapflights users on 6/17. 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 7/31:37 pmGEG - RAP
1 stop6h 10mUnited Airlines
Mon 7/77:00 amRAP - GEG
1 stop6h 35mUnited Airlines
Deal found 6/17$411

Cheapflights Fare Finder

Customize your flight search to find flights from Idaho to South Dakota 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 June 18, 2025.
Use the filters below to find and compare flights from Idaho to South Dakota that are best for you.

Fly from

Idaho

Fly to

South Dakota

Route

Depart

Return

Price

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 7/4

12:29 pm-11:10 pm

1 stop8h 41m

Sioux Falls Joe Foss Field

Sun 7/6

7:59 pm-11:11 pm

1 stop5h 12m

$244

BoiseRapid City

BOI - RAP

BOIRAP

Boise Air Term. Gowen Fld

Fri 11/14

2:31 pm-6:43 pm

1 stop4h 12m

Rapid City

Sat 11/22

5:15 am-9:58 am

1 stop4h 43m

$249

JacksonRapid City

JAC - RAP

JACRAP

Jackson Hole

Thu 7/3

4:07 pm-8:47 pm

1 stop4h 40m

Rapid City

Mon 7/7

7:00 am-12:50 pm

1 stop5h 50m

$269

BoiseRapid City

BOI - RAP

BOIRAP

Boise Air Term. Gowen Fld

Fri 8/15

3:06 pm-10:31 pm

1 stop7h 25m

Rapid City

Mon 8/18

6:20 am-2:01 pm

1 stop7h 41m

$289

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Sat 9/13

2:05 pm-10:10 pm

1 stop7h 05m

Rapid City

Sat 9/20

6:20 am-4:07 pm

2 stops10h 47m

$294

Idaho FallsRapid City

IDA - RAP

IDARAP

Idaho Falls Fanning Field

Fri 7/4

4:13 pm-8:56 pm

1 stop4h 43m

Rapid City

Fri 7/11

5:59 pm-10:51 pm

1 stop4h 52m

$294

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Wed 7/9

3:17 pm-11:44 pm

1 stop7h 27m

Sioux Falls Joe Foss Field

Mon 7/14

6:16 pm-12:09 am

2 stops6h 53m

$294

BoiseSioux Falls

BOI - FSD

BOIFSD

Boise Air Term. Gowen Fld

Tue 7/1

5:42 pm-11:37 pm

1 stop4h 55m

Sioux Falls Joe Foss Field

Sat 7/5

6:00 am-9:52 am

1 stop4h 52m

$325

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 7/4

1:37 pm-8:20 pm

1 stop4h 43m

Sioux Falls Joe Foss Field

Fri 7/11

5:10 pm-9:03 pm

1 stop5h 53m

$339

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Thu 7/3

1:51 pm-11:58 pm

1 stop8h 07m

Sioux Falls Joe Foss Field

Thu 7/10

5:11 pm-11:28 pm

1 stop8h 17m

$354

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 35 results
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Best time to book a flight from Idaho to South Dakota

Have a flexible travel schedule? Discover the best time to fly to South Dakota from Idaho 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 Idaho to South Dakota

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

Currently, September is the cheapest month in which you can book a flight from Idaho to South Dakota (average of $334). Flying from Idaho to South Dakota in December is currently the most expensive (average of $446). 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 ID to SD?

Find hourly flight availability from Idaho to South Dakota. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 18, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to South Dakota as you normally would.

Rainfall in South Dakota by month

Plan your trip to South Dakota by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in South Dakota ranges from 0.6 - 3.9 inches per month. June is typically the wettest month, when rainfall can reach 3.9 in. January is typically the driest time to visit South Dakota when rainfall is around 0.6 in.

Temperature in South Dakota by month

Plan your trip to South Dakota by taking into account the average temperature totals by month.

If weather is an important factor for your trip to South Dakota, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

Reviews of airlines servicing South Dakota

Get insights into the airlines that provide service to South Dakota. 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 South Dakota. Reviews last updated June 18, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines from Idaho to South Dakota. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Allegiant Air
7.3
Good
722 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

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

  • What are the cheapest airlines to fly from Idaho to South Dakota one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $126. However, be on the lookout for offers from Delta and Allegiant Air, as they are both options that can get you from Idaho to South Dakota for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho to South Dakota 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 Idaho to South Dakota?

    Currently, September is the cheapest month in which you can book a flight from Idaho to South Dakota (average of $334). Flying from Idaho to South Dakota in December is currently the most expensive (average of $446). 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 Idaho to South Dakota

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Idaho to South Dakota

Discover the top 2 airlines that operate flights from Idaho to South Dakota. 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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$219Average$382FlexibilityNo cancel feeOn-time69%
DeltaCheapest$226Average$306FlexibilityNo cancel feeOn-timeN/A

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