$166 Find Cheap Flights from Chicago to Idaho Falls - Compare and Save

Among airlines operating Chicago to Idaho Falls flights:

• American Airlines: offers free seat selection
• United Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

2 airlines operate flights between Chicago and Idaho Falls. The airlines offering nonstop flights on this route include:

• American Airlines
• United Airlines

Flights from Chicago to Idaho Falls may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD). Flights usually arrive at Idaho Falls Fanning Field (IDA).

Here are some options for this route, based on selected ticket types and cabin classes:

• American Airlines: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from Chicago to Idaho Falls.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $388 round-trip via Salt Lake City (SLC), compared to $475 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

One-stop flights from Chicago to Idaho Falls most commonly connect through:

• Denver Intl (DEN) - 71% of one-stop connections
• Salt Lake City (SLC) - 22% of one-stop connections
• Dallas/Fort Worth (DFW) - 2% of one-stop connections
• Chicago O'Hare Intl (ORD) - 2% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

On the Chicago to Idaho Falls route, being flexible with your departure day can save you up to 15%. Saturday is the cheapest day at $427 round-trip on average, while Sunday is the most expensive at $501: a $74 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Morning is the busiest departure period on Chicago to Idaho Falls flights, with 100% of flights leaving in that window. Afternoon departures account for 0%, evening flights for 0%, and night flights for 0%.

These are the earliest and latest flight times available from Chicago to Idaho Falls:

• Earliest: departs at 8:47 am and lands at 12:35 pm
• Latest: departs at 10:45 am and lands at 2:33 pm.

The flight takes about 3h 48m.

A nonstop flight from Chicago to Idaho Falls takes 3h 48m, covering 1,241 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $321 to $1,732. That means the highest observed fare was about 5x higher than the lowest one.

One-way fares from Chicago to Idaho Falls are currently lower than usual. Average one-way flight prices are about $238, which is 19% below the typical average for this route.

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 16m, compared with 5h 52m via Denver Intl (DEN) and 6h 56m via Dallas/Fort Worth (DFW).

Idaho Falls is 1 hour behind Chicago (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Idaho Falls Fanning Field Airport (IDA) hosts 5 major car rental companies, with daily rates starting from around $34 for economy cars. Top options include:
• Alamo
• Hertz
• Enterprise Rent-A-Car
• Budget
• National

Round-trip flights from Chicago to Idaho Falls range from $390 to $547, with an average of $452 over the past 12 months. Anything below $390 counts as a good deal.

American Airlines is the only airline on the Chicago to Idaho Falls route offering in-flight Wi-Fi. Pricing depends on fare class.