Chicago to Idaho Falls flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Chicago to Idaho Falls is €129 with Allegiant Air (checked on 6 Nov 2026).
Your next trip, last seen at €129
Lowest observedAllegiant Air · 1 stop · One wayWhen to fly
Explore datesMore dates worth a look
Last seen for 1 traveller on 6 Nov 2026. Check today's price.
Find the dates that work for you
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.
One-way fare
- 1 Jan€190
- 6 Jan€239
- 7 Jan€140
- 8 Jan€162
- 9 Jan€240
- 10 Jan€129
- 12 Jan€165
- 13 Jan€165
- 14 Jan€150
- 16 Jan€189
- 17 Jan€223
- 20 Jan€165
- 21 Jan€191
- 23 Jan€190
- 24 Jan€169
- 27 Jan€144
- 28 Jan€137
- 29 Jan€190
- 30 Jan€190
- 31 Jan€136
- Lowest observed
- €129, departing 10 Jan 2027 (Last checked: 6 Nov 2026)One-way fare · Priced departure days checked in the last 14 days: 76Check live prices for this route
- Airlines seen
- Air Canada, Alaska Airlines, Allegiant Air, Frontier Airlines, Sun Country Airlines, United Airlines, Viva Aerobus, Volaris (8)
- Typical journey time
- 10h 09m
About this route
Explore the fares we observed from Chicago to Idaho Falls. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,996 km
- Typical journey time
- 10h 09m
- Airlines seen
- Air Canada, Alaska Airlines, Allegiant Air, Frontier Airlines, Sun Country Airlines, United Airlines, Viva Aerobus, Volaris (8)
- Seen on fares with a connection
- Alaska Airlines, Allegiant Air, Frontier Airlines, United Airlines, Viva Aerobus
- Alternative airports
- CGX, DPA, MDW, PWK, RFD
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- Chicago Midway International Airport (MDW) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 14 km.
- Chicago O'Hare International Airport (ORD) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 25 km.
- Chicago Rockford International Airport (RFD) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 126 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 departure day we saw in January 2027 from Chicago to Idaho Falls: 10 Jan 2027, €129 (checked 6 Nov 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €163 | 8 |
| December 2026 | €136 | 15 |
| January 2027 | €129 | 20 |
| February 2027 | €145 | 19 |
| March 2027 | €169 | 14 |
Lowest fare by day of the week
Cheapest Sunday departure we saw from Chicago to Idaho Falls: 10 Jan 2027, €129 (checked 6 Nov 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €169 | 5 |
| Tuesday | €164 | 9 |
| Wednesday | €136 | 17 |
| Thursday | €137 | 15 |
| Friday | €145 | 12 |
| Saturday | €189 | 7 |
| Sunday | €129 | 11 |
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 Chicago to Idaho Falls by days until departure (61 days or more): €129 (checked 6 Nov 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €163 | 4 |
| 8 to 30 days | €136 | 9 |
| 31 to 60 days | €140 | 15 |
| 61 days or more | €129 | 48 |
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 Chicago to Idaho Falls: Allegiant Air, €129 (checked 6 Nov 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €129Jan 10, 2027 | 19 |
| Frontier Airlines | €136Dec 2, 2026 | 18 |
| Alaska Airlines | €164Feb 2, 2027 | 39 |
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 Chicago to Idaho Falls?
The lowest fare Routavio has observed is €129, found on 6 Nov 2026.
Are there direct flights from Chicago to Idaho Falls?
Our data holds no non-stop flight from Chicago to Idaho Falls. The fares on this page include at least one stop.
Which airlines fly from Chicago to Idaho Falls?
Routavio has seen these carriers on the route: Air Canada, Alaska Airlines, Allegiant Air, Frontier Airlines, Sun Country Airlines, United Airlines, Viva Aerobus, Volaris (8).
How long does the flight from Chicago to Idaho Falls take?
Across the 130 fares Routavio observed, the average journey time is 14h 37m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Chicago to Idaho Falls fares were non-stop?
None of the 130 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
When is the cheapest month to fly from Chicago to Idaho Falls?
Cheapest departure day we saw in January 2027 from Chicago to Idaho Falls: 10 Jan 2027, €129 (checked 6 Nov 2026).
Which day of the week is cheapest from Chicago to Idaho Falls?
Cheapest Sunday departure we saw from Chicago to Idaho Falls: 10 Jan 2027, €129 (checked 6 Nov 2026).
Which airline has the lowest fare from Chicago to Idaho Falls?
Cheapest airline from Chicago to Idaho Falls: Allegiant Air, €129 (checked 6 Nov 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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