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$160+ Cheap flights from Rapid City (RAP) to Idaho

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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Rapid City to Idaho

Keep the following information in mind while searching for Rapid City to Idaho flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(Delta)

One-way from

$160
(Trip.com)

Popular in

November

Cheapest in

January

Average price

$294
Provider with most accurate pricing for Rapid City-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Rapid City-Boise Air Term. Gowen Fld flights.
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From Rapid City to Idaho
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One-way flight from Rapid City to Idaho
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Highest demand for flights based on searches. 10% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Rapid City to Idaho

Cheapest flights from Rapid City to Idaho
Explore the most affordable flight options available from Rapid City to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Delta deal was found by Cheapflights users on 10/29. 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 11/134:25 pmRAP - BOI
1 stop7h 44mDelta
Mon 11/173:20 pmBOI - RAP
1 stop7h 19mDelta
Deal found 10/29$279
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/1310:22 amRAP - GEG
1 stop5h 59mUnited Airlines
Mon 11/171:47 pmGEG - RAP
1 stop5h 39mUnited Airlines
Deal found 10/28$279
This Delta deal was found by Cheapflights users on 10/30. 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 11/1411:07 amRAP - GEG
2 stops10h 54mDelta
Tue 11/182:09 pmGEG - RAP
1 stop7h 30mDelta
Deal found 10/30$284
This Delta deal was found by Cheapflights users on 10/30. 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 11/142:51 pmRAP - BOI
2 stops9h 44mDelta
Tue 11/186:00 amBOI - RAP
2 stops8h 11mDelta
Deal found 10/30$334
This Delta deal was found by Cheapflights users on 10/29. 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 10/312:25 pmRAP - GEG
1 stop6h 21mDelta
Wed 11/52:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 10/29$354
This Delta deal was found by Cheapflights users on 10/30. 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 10/316:05 amRAP - GEG
2 stops10h 48mDelta
Sat 11/82:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 10/30$359
This Delta deal was found by Cheapflights users on 10/30. 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 10/312:25 pmRAP - GEG
1 stop6h 21mDelta
Tue 11/42:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 10/30$369
This Delta deal was found by Cheapflights users on 10/29. 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 10/312:25 pmRAP - GEG
2 stops9h 23mDelta
Sun 11/22:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 10/29$374
This Delta deal was found by Cheapflights users on 10/30. 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 10/316:05 amRAP - GEG
1 stop8h 00mDelta
Fri 11/72:17 pmGEG - RAP
1 stop7h 19mDelta
Deal found 10/30$404
This United Airlines deal was found by Cheapflights users on 10/30. 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 11/17:10 amRAP - GEG
1 stop6h 35mUnited Airlines
Fri 11/71:47 pmGEG - RAP
1 stop5h 39mUnited Airlines
Deal found 10/30$424
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/195:15 amRAP - IDA
1 stop4h 43mUnited Airlines
Sat 12/205:00 amIDA - RAP
1 stop14h 12mUnited Airlines
Deal found 10/29$603
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/211:15 amRAP - IDA
1 stop4h 01mUnited Airlines
Tue 11/47:00 amIDA - RAP
1 stop4h 05mUnited Airlines
Deal found 10/29$944

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City 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 October 30, 2025.
Use the filters below to find and compare flights from Rapid City to Idaho that are best for you.

Fly from

Rapid City

Fly to

Idaho

Route

Depart

Return

Price

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Sat 2/28

4:00 pm-11:16 pm

1 stop8h 16m

Spokane

Tue 3/3

6:30 am-3:14 pm

1 stop7h 44m

$249

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 11/13

10:22 am-3:21 pm

1 stop5h 59m

Spokane

Mon 11/17

1:47 pm-8:26 pm

1 stop5h 39m

$279

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Thu 11/13

4:25 pm-12:09 am

1 stop7h 44m

Boise Air Term. Gowen Fld

Mon 11/17

3:20 pm-10:39 pm

1 stop7h 19m

$279

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Fri 11/14

4:25 pm-12:09 am

1 stop7h 44m

Boise Air Term. Gowen Fld

Tue 11/18

5:35 am-2:11 pm

1 stop8h 36m

$279

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Fri 11/14

11:07 am-9:01 pm

2 stops10h 54m

Spokane

Tue 11/18

2:09 pm-10:39 pm

1 stop7h 30m

$284

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Tue 3/3

7:00 am-1:30 pm

1 stop6h 30m

Idaho Falls Fanning Field

Sat 3/7

4:19 pm-8:33 pm

1 stop4h 14m

$289

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Tue 3/3

6:20 am-2:09 pm

1 stop7h 49m

Boise Air Term. Gowen Fld

Sat 3/7

3:00 pm-10:14 pm

1 stop7h 14m

$294

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Mon 2/16

2:52 pm-9:17 pm

1 stop7h 25m

Spokane

Sun 2/22

5:00 am-1:13 pm

1 stop7h 13m

$319

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Thu 11/13

2:51 pm-8:03 pm

1 stop6h 12m

Spokane

Mon 11/17

9:20 am-10:39 pm

2 stops12h 19m

$364

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Fri 12/19

5:15 am-9:58 am

1 stop4h 43m

Idaho Falls Fanning Field

Sat 12/20

5:00 am-7:12 pm

1 stop14h 12m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 results
1
2

Best time to book a flight from Rapid City to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Rapid City 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 Rapid City to Idaho

What is the cheapest month to book a flight from Rapid City to Idaho?

Currently, January is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $248). Flying from Rapid City to Idaho in June is currently the most expensive (average of $449). 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.

How much does it cost to fly round-trip from Rapid City 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 October 30, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Rapid City to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

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

  • What airport do you fly from for flights from Rapid City to Idaho?

    Located just 9.0 mi from the city center, Rapid City (RAP) is the airport most travelers will use when flying to Idaho from Rapid City.

  • How long is the flight from Rapid City to Idaho?

    For as low as $279, Delta can have you in Idaho from Rapid City in 5h 59m. Rapid City and Idaho are separated by a distance of 738 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Rapid City to Idaho one-way?

    For one-way options, check prices for Allegiant Air. According to our data, you can fly for as low as $160. Users have also found prices from $226 and $236 on United Airlines and Delta, respectively.

  • What are the most popular routes from Rapid City to Idaho?

    While some choose either Rapid City - Idaho Falls Fanning Field or Rapid City - Boise Air Term. Gowen Fld, Rapid City - Spokane is the most popular route from Rapid City to Idaho.

  • Can I find deals for flights from Rapid City to Idaho that include hotel bookings?

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

  • How can I find direct flights from Rapid City to Idaho?

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

  • Can I find deals for business class flights from Rapid City to Idaho?

    Yes. Cheapflights offers flight deals from Rapid City 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 Rapid City to Idaho?

    Currently, January is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $248). Flying from Rapid City to Idaho in June is currently the most expensive (average of $449). 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 Rapid City to Idaho

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Top 2 airlines flying from Rapid City to Idaho

Discover the top 2 airlines that operate flights from Rapid City 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$416FlexibilityNo cancel feeOn-time69%

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