$162 Find Cheap Flights from Idaho Falls to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to Illinois departing on 8/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Illinois, as well as popular online travel agencies
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Best Illinois Flight Deals from Idaho Falls

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicagononstop$323
St. Louis
St. Louis1 stop$337
Chicago
Chicagononstop$323
St. Louis
St. Louis1 stop$337

Cheap Flights from Idaho Falls to Illinois

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Idaho Falls to Illinois

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Idaho Falls to Illinois.
Discover the best prices for you by selecting your travel dates on KAYAK.
American Airlines Logo
12:46 pm - 5:11 pmIDA-ORD
3h 25mnonstop
American Airlines Logo
9:55 am - 12:10 pmORD-IDA
3h 15mnonstop
$323American Airlines
Find Deal
Wed, Aug 13 - Wed, Aug 27
American Airlines Logo
12:46 pm - 5:11 pmIDA-ORD
3h 25mnonstop
American Airlines Logo
2:55 pm - 9:18 pmORD-IDA
7h 23m1 stop
$333American Airlines
Find Deal
Wed, Aug 13 - Wed, Aug 27
Delta Logo
6:50 pm - 12:59 amIDA-STL
5h 09m1 stop
Delta Logo
7:15 pm - 10:55 pmSTL-IDA
4h 40m1 stop
$337Delta
Find Deal
Sun, Jun 1 - Wed, Jun 11
Alaska Airlines Logo
4:20 pm - 11:59 pmIDA-ORD
6h 39m1 stop
Alaska Airlines Logo
5:58 pm - 3:40 pmORD-IDA
22h 42m1 stop
$342Alaska Airlines
Find Deal
Wed, May 21 - Wed, May 28
Delta Logo
11:20 am - 6:05 pmIDA-ORD
5h 45m1 stop
Delta Logo
7:15 am - 2:23 pmORD-IDA
8h 08m1 stop
$343Delta
Find Deal
Wed, Aug 13 - Wed, Aug 27
Delta Logo
6:00 am - 4:45 pmIDA-ORD
9h 45m2 stops
Delta Logo
1:40 pm - 6:10 pmORD-IDA
5h 30m1 stop
$348Delta
Find Deal
Wed, May 21 - Wed, May 28
 Logo
5:49 pm - 8:53 amIDA-ORD
14h 04m2 stops
 Logo
9:56 pm - 11:44 amORD-IDA
14h 48m1 stop
Thu, Jul 3 - Sun, Jul 6
United Airlines Logo
5:55 pm - 12:25 amIDA-ORD
5h 30m1 stop
United Airlines Logo
5:02 am - 9:44 amORD-IDA
5h 42m1 stop
$369United Airlines
Find Deal
Fri, Jun 13 - Fri, Jun 20
United Airlines Logo
4:13 pm - 12:30 amIDA-ORD
7h 17m1 stop
United Airlines Logo
5:00 am - 9:44 amORD-IDA
5h 44m1 stop
$423United Airlines
Find Deal
Thu, Jul 3 - Sun, Jul 6
Alaska Airlines Logo
4:03 pm - 11:59 pmIDA-ORD
6h 56m1 stop
Alaska Airlines Logo
6:20 am - 10:39 pmORD-IDA
17h 19m1 stop
$427Alaska Airlines
Find Deal
Thu, Sep 18 - Mon, Sep 22
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KAYAK's insights & trends for Idaho Falls to Illinois flights

Get data-powered insights and trends into flights from Idaho Falls to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Idaho Falls to Illinois flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Idaho Falls to Illinois.

The cheapest ticket to Illinois from Idaho Falls found in the last 72 hours was to Chicago, at $288 round-trip. The most popular route is from Idaho Falls (IDA) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $288.

What’s the cheapest day of the week to fly from Idaho Falls to Illinois?

The average price of all round-trip flights from Idaho Falls to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Tuesday and more expensive on a Saturday. On your return trip to Idaho Falls, you should consider flying back on a Friday, and avoid Thursdays for better deals.


Good to know

Low seasonSeptember
High seasonMay
Cheapest flight$162
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Idaho Falls to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Idaho Falls to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Idaho Falls to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho Falls to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Idaho Falls to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Idaho Falls to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Idaho Falls to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho Falls to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Idaho Falls to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $525 on average. Morning departures are around 14% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $616.

Top airline flying from Idaho Falls to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Idaho Falls to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8696 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
8.1Crew
Airline reviews

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

10.0 ExcellentDr. Joseph, Apr 2025IAH - ORD
Read more United Airlines reviews

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

They canceled our flight and left us stranded to figure it out

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

Everything you need to know for your flight from Idaho Falls to Illinois

Information on your arrival and departure airports

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