Your next trip, last seen at €50
Lowest observedAllegiant Air · Non-stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
- Lowest observed
- €50, departing 10 Dec 2026 (Last checked: 11 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 108Check live prices for this route
- Airlines seen
- Allegiant Air, Alaska Airlines, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines +1 more
- Reported fastest flight
- 1h 46m
- Non-stop
- Yes
About this route
Explore the fares we observed from Las Vegas to Idaho Falls. Prices move often, so pick your dates to see the latest options.
- Route distance
- 856 km
- Reported fastest flight
- 1h 46m
- Airlines seen
- Allegiant Air, Alaska Airlines, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines +1 more
Route-level information; individual journeys vary.
Published schedules report non-stop service with Allegiant Air. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
Fastest non-stop we saw: 1h 46m with Allegiant Air.
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Allegiant Air | 36 / 106 | 1h 46m |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Harry Reid International Airport (LAS) → Las Vegas, city gazetteer reference point (36.1699, -115.1398): ≈ 10 km.
- Idaho Falls Regional Airport (IDA) → Idaho Falls, city gazetteer reference point (43.4927, -112.0408): ≈ 3 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Las Vegas to Idaho Falls: December 2026, from €50 (checked 11 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €57 | 18 |
| November 2026 | €51 | 27 |
| December 2026 | €50 | 31 |
| January 2027 | €50 | 26 |
| February 2027 | €65 | 6 |
Lowest fare by day of the week
Cheapest day of the week from Las Vegas to Idaho Falls: Thursday, from €50 (checked 11 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €57 | 17 |
| Tuesday | €134 | 14 |
| Wednesday | €74 | 16 |
| Thursday | €50 | 15 |
| Friday | €50 | 16 |
| Saturday | €78 | 16 |
| Sunday | €166 | 14 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Las Vegas to Idaho Falls by days until departure (31 to 60 days): €50 (checked 11 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €78 | 8 |
| 8 to 30 days | €51 | 23 |
| 31 to 60 days | €50 | 27 |
| 61 days or more | €50 | 50 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Las Vegas to Idaho Falls: Allegiant Air, from €50 (checked 11 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €50Dec 10, 2026 | 39 |
| Alaska Airlines | €134Nov 11, 2026 | 48 |
| United Airlines | €179Nov 21, 2026 | 15 |
| Breeze Airways | €183Dec 16, 2026 | 5 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Las Vegas to Idaho Falls?
The lowest fare we have observed is €50, found on 11 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Las Vegas to Idaho Falls?
Cheapest month from Las Vegas to Idaho Falls: December 2026, from €50 (checked 11 Oct 2026).
Are there direct flights from Las Vegas to Idaho Falls?
Yes. We have seen non-stop flights on this route, flown by Allegiant Air.
Which airlines fly from Las Vegas to Idaho Falls?
These are the carriers we have seen on the route: Allegiant Air, Alaska Airlines, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines +1 more.
How long does the flight from Las Vegas to Idaho Falls take?
The average journey time across the 109 fares we observed is 5h 30m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Las Vegas to Idaho Falls fares were non-stop?
38 of the 109 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Las Vegas to Idaho Falls?
For Las Vegas to Idaho Falls, examples of observed one-way non-stop offers checked within the last 14 days: Allegiant Air (36). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Las Vegas to Idaho Falls?
Cheapest day of the week from Las Vegas to Idaho Falls: Thursday, from €50 (checked 11 Oct 2026).
Which airline has the lowest fare from Las Vegas to Idaho Falls?
Cheapest airline from Las Vegas to Idaho Falls: Allegiant Air, from €50 (checked 11 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 11 Oct 2026