What are the cheapest airlines flying from Rapid City to Idaho Falls round-trip?

Our cheapest airline available from Rapid City to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as $229 on this airline. An additional option worth looking into is Delta, starting at $1,419.

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

Currently, October is the cheapest month in which you can book a flight from Rapid City to Idaho Falls (average of $380). Flying from Rapid City to Idaho Falls in December is currently the most expensive (average of $578). 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 day to fly from Rapid City to Idaho Falls?

Travelers seeking maximum savings on their Rapid City to Idaho Falls flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

If weather is an important factor for your trip to Idaho Falls, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest day to fly round-trip from Rapid City to Idaho Falls?

Users have found that flying from Rapid City to Idaho Falls on a Tuesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest time of day to fly from RAP to IDA?

Unlike at noon, when flights are generally more expensive, you can save up to 45% on flights from Rapid City to Idaho Falls by exploring options for tickets in the morning.

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

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

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

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 Falls.

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

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

$228+ Flights from Rapid City to Idaho Falls

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Cheap flight deals from Rapid City to Idaho Falls

Round-trip from	$229 (United Airlines)
One-way from	$228 (United Airlines)

From Rapid City to Idaho Falls Fanning Field

Search Deals

One-way flight from Rapid City to Idaho Falls Fanning Field

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Find flight deals from Rapid City to Idaho Falls

Cheapest flights from Rapid City to Idaho Falls
Explore the most affordable flight options available from Rapid City to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

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

Wed 8/136:26 amRAP - IDA

2 stops11h 45mDelta

Sun 8/176:00 amIDA - RAP

2 stops7h 44mDelta

Deal found 7/29

$1,419

Best flights from Rapid City to Idaho Falls
Discover carefully curated flight deals from Rapid City to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Wed 1/75:30 amRAP - IDA

1 stop3h 58mUnited Airlines

Sat 1/105:57 pmIDA - RAP

1 stop4h 11mUnited Airlines

Deal found 7/28

$229

Wed 8/136:26 amRAP - IDA

2 stops11h 45mDelta

Sun 8/176:00 amIDA - RAP

2 stops7h 44mDelta

Deal found 7/29

$1,419

Last-minute flights from Rapid City to Idaho Falls
Discover last-minute flight deals from Rapid City to Idaho Falls. Data last updated July 29, 2025 and is based on user searches.

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

Wed 8/136:26 amRAP - IDA

2 stops11h 45mDelta

Sun 8/176:00 amIDA - RAP

2 stops7h 44mDelta

Deal found 7/29

$1,419

One-way flights from Rapid City to Idaho Falls
Search for one-way flight options from Rapid City to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Tue 9/25:30 amRAP - IDA

1 stop4h 17mUnited Airlines

Deal found 7/27

$228

Tue 9/210:55 amRAP - IDA

2 stops7h 16mDelta

Deal found 7/27

$806

Cheapflights Fare Finder

Use the filters below to find and compare flights from Rapid City to Idaho Falls that are best for you.

Fly from

Fly to

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 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 CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Tue 9/2

5:30 am-9:47 am

1 stop4h 17m

$228

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Tue 9/2

10:55 am-6:11 pm

2 stops7h 16m

$806

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Rapid City to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls 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.

Reviews of airlines servicing Idaho Falls

Read reviews from past customers who have flown Delta and United Airlines from Rapid City to Idaho Falls. 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.

Delta

8.0

Very good

7,977 reviews

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

7,977 reviews

Delta

8.0

Very good

7,977 reviews

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

8,899 reviews

Delta

8.0

Very good

7,977 reviews

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

What are the cheapest airlines flying from Rapid City to Idaho Falls round-trip?
Our cheapest airline available from Rapid City to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as $229 on this airline. An additional option worth looking into is Delta, starting at $1,419.
Can I find deals for flights from Rapid City to Idaho Falls that include hotel bookings?
Yes. In addition to deals on Rapid City to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Rapid City to Idaho Falls?
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 Falls.
Can I find deals for business class flights from Rapid City to Idaho Falls?
Yes. Cheapflights offers flight deals from Rapid City to Idaho Falls 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 Falls?
Currently, October is the cheapest month in which you can book a flight from Rapid City to Idaho Falls (average of $380). Flying from Rapid City to Idaho Falls in December is currently the most expensive (average of $578). 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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Top airline flying from Rapid City to Idaho Falls

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$182	Average$399	FlexibilityNo cancel fee	On-time69%

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$228+ Cheap flights from Rapid City to Idaho Falls (RAP - IDA)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Rapid City to Idaho Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Rapid City to Idaho Falls

Round-trip from

One-way from

Find flight deals from Rapid City to Idaho Falls

Cheapest flights from Rapid City to Idaho FallsExplore the most affordable flight options available from Rapid City to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Rapid City to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Rapid City to Idaho Falls that are best for you.

Best time to book a flight from Rapid City to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Rapid City with our price prediction graph.

Reviews of airlines servicing Idaho Falls

Read reviews from past customers who have flown Delta and United Airlines from Rapid City to Idaho Falls. 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.

Related info for your journey

Find useful and relevant information for your journey from Rapid City to Idaho Falls. 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 flying from Rapid City to Idaho Falls round-trip?

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

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

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

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

Traveling to a place near Idaho Falls?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Rapid City to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Rapid City to Idaho Falls

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Travel Smart

Cheapest flights from Rapid City to Idaho Falls
Explore the most affordable flight options available from Rapid City to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.