United AirlinesDepart16:00
Fri, Nov 13RAP → IDA
3h 36m · 1 stop
$389one way, per person
View deal
- Cheapest fare
- $389
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 3h 21m
United Airlines · Fri, Nov 13
from $389
Usually 1+ stop
710 km
Get a price alert
We'll email you when Rapid City → Idaho Falls drops to your price. It's free, and you can stop any time.
Today's cheapest fare is $389. We'll send one email to confirm. See our privacy policy.
Cheapest month to fly from Rapid City to Idaho Falls
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
United AirlinesPlan the rest of your trip to Idaho Falls
Where to stay, what to do and getting around, from our travel partners.
About flights from Rapid City to Idaho Falls
Rapid City (RAP) and Idaho Falls (IDA) are about 710 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 3h 21m. Over the next few months, one-way fares start from $389, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Rapid City to Idaho Falls?
The cheapest one-way fare we've seen recently is $389 with United Airlines, departing Friday, November 13, 2026.
What is the cheapest month to fly from Rapid City to Idaho Falls?
November 2026 currently has the lowest fares, from $389 one way.
Are there direct flights from Rapid City to Idaho Falls?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Rapid City to Idaho Falls?
The quickest journey we've seen takes about 3h 21m. Rapid City and Idaho Falls are around 710 km apart.
Which airlines fly from Rapid City to Idaho Falls?
Recent fares on this route were with United Airlines.
More cheap flights from Rapid City
- Rapid City to Dallasfrom $317
- Rapid City to Phoenixfrom $128
- Rapid City to Las Vegasfrom $197
- Rapid City to Denverfrom $228
- Rapid City to Twin Fallsfrom $251
- Rapid City to Minneapolisfrom $275
- Rapid City to Chicagofrom $290
- Rapid City to Miamifrom $296
- Rapid City to Sioux Fallsfrom $306
- Rapid City to Abilenefrom $351
- Rapid City to Scottsblufffrom $354
- Rapid City to North Plattefrom $354