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$200+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — BOI
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$229
(United Airlines)

One-way from

$200
(Delta)

Popular in

November

Cheapest in

January

Average price

$308
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. 14% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:25 amRAP - BOI
1 stop7h 36mDelta
Sat 9/133:20 pmBOI - RAP
1 stop7h 10mDelta
Deal found 7/28$249
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 8/135:30 amRAP - BOI
1 stop4h 16mUnited Airlines
Sun 8/175:00 amBOI - RAP
1 stop4h 04mUnited Airlines
Deal found 7/29$259
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 8/135:30 amRAP - IDA
1 stop4h 14mUnited Airlines
Sun 8/176:03 pmIDA - RAP
1 stop3h 57mUnited Airlines
Deal found 7/29$314
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 8/264:47 pmRAP - GEG
1 stop5h 16mUnited Airlines
Sat 8/304:00 pmGEG - RAP
1 stop4h 59mUnited Airlines
Deal found 7/28$349
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/315:36 amRAP - GEG
1 stop7h 01mAmerican Airlines
Sun 8/312:27 pmGEG - RAP
1 stop7h 39mAmerican Airlines
Deal found 7/29$419
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:00 pmRAP - BOI
2 stops20h 17mAmerican Airlines
Sat 9/131:57 pmBOI - RAP
2 stops22h 05mAmerican Airlines
Deal found 7/28$447
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:25 amRAP - GEG
2 stops16h 01mDelta
Sat 8/307:10 amGEG - RAP
2 stops14h 22mDelta
Deal found 7/28$461
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/319:59 pmRAP - GEG
2 stops20h 03mMultiple Airlines
Sun 8/39:33 amGEG - RAP
1 stop10h 26mMultiple Airlines
Deal found 7/29$595
This Delta deal was found by Cheapflights users on 7/29. 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.
Wed 8/136:26 amRAP - IDA
2 stops11h 45mDelta
Sun 8/176:00 amIDA - RAP
2 stops7h 44mDelta
Deal found 7/29$1,419

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 July 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 CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Wed 1/7

5:30 am-9:28 am

1 stop3h 58m

Idaho Falls Fanning Field

Sat 1/10

5:57 pm-10:08 pm

1 stop4h 11m

$229

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 9/3

6:25 am-2:01 pm

1 stop7h 36m

Boise Air Term. Gowen Fld

Sat 9/13

3:20 pm-10:30 pm

1 stop7h 10m

$249

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 8/13

5:30 am-9:46 am

1 stop4h 16m

Boise Air Term. Gowen Fld

Sun 8/17

5:00 am-9:04 am

1 stop4h 04m

$259

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 8/26

4:47 pm-9:03 pm

1 stop5h 16m

Spokane

Sat 8/30

4:00 pm-9:59 pm

1 stop4h 59m

$349

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Wed 9/3

5:00 pm-1:17 pm

2 stops20h 17m

Boise Air Term. Gowen Fld

Sat 9/13

1:57 pm-12:02 pm

2 stops22h 05m

$447

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 8/26

6:25 am-9:26 pm

2 stops16h 01m

Spokane

Sat 8/30

7:10 am-10:32 pm

2 stops14h 22m

$461

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Wed 8/13

6:26 am-6:11 pm

2 stops11h 45m

Idaho Falls Fanning Field

Sun 8/17

6:00 am-1:44 pm

2 stops7h 44m

$1,419

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Sun 8/17

6:26 am-1:59 pm

1 stop7h 33m

$200

Rapid CityBoise

RAP - BOI

RAPBOI

Rapid City

Fri 8/15

5:59 pm-11:43 am

2 stops17h 44m

$318

Rapid CitySpokane

RAP - GEG

RAPGEG

Rapid City

Tue 9/2

10:00 am-3:13 pm

1 stop6h 13m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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, October is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $314). Flying from Rapid City to Idaho in June is currently the most expensive (average of $398). 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.

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 July 30, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Rapid City to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

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 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.

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

    While some choose either Rapid City - Spokane or Rapid City - Idaho Falls Fanning Field, Rapid City - Boise Air Term. Gowen Fld 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, October is the cheapest month in which you can book a flight from Rapid City to Idaho (average of $314). Flying from Rapid City to Idaho in June is currently the most expensive (average of $398). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$420FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$248FlexibilityNo cancel feeOn-timeN/A

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