$69 Find Cheap Flights from Illinois to Idaho

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Low seasonApril
High seasonJuly
Cheapest flight$69
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Chicago O'Hare Airport to Boise

FAQs for booking flights from Illinois to Idaho

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

    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 Illinois to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Idaho 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 Illinois to Idaho?

    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 Illinois to Idaho 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 Illinois to Idaho?

    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 Illinois to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Idaho?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Boise Air Term. Gowen Fld Airport (BOI), with an average flight price of $188.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Saturday where round-trip tickets can be as cheap as $397. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $631 on average.

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

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $327 on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is $555.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Illinois found in the last 72 hours was to Boise, at $239 round-trip. The most popular route is Chicago Midway Airport (MDW) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $239.

  • What is the cheapest month to fly from Illinois to Idaho?

    The cheapest month for flights from Illinois to Idaho is May, when tickets cost $307 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $502 and $484 respectively.

  • How far in advance should I book a flight from Illinois to Idaho?

    To get a below average price on the flight from Illinois to Idaho, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

  • How long is the flight to Idaho?

    An average nonstop flight from Illinois to Idaho takes 8h 22m, covering a distance of 1307 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Jackson (JAC) with an average flight time of 3h 12m.

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Jackson (37% of total searches to Idaho). The next most popular destinations are Spokane (31%) and Boise (21%). Searches for flights to Idaho Falls (4%), to West Yellowstone (3%) and to Hailey (3%) are also popular.

Reviews of the top 5 airlines serving from Illinois to Idaho

 
Need help choosing which airline to fly with from Illinois to Idaho? 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Food
7.8Comfort
8.1Boarding
8.5Crew
7.1Entertainment
Airline reviews

fine. only problem,,,, for some,,,,was that many people started trying to exit from the back of the plane,, . lots of irate people. there should be a flight attendant mid plane..to be sure that doesn't happen. The crew up front had no idea what was happening. One big guy started it..then a bunch of others followed his lead. could have gotten ugly... One man stepped in and questioned those rule breakers.. nothing bad happened,,,but......

8.0 ExcellentLiz, Jul 2025SFO - SEA
Read more Alaska Airlines reviews

fine. only problem,,,, for some,,,,was that many people started trying to exit from the back of the plane,, . lots of irate people. there should be a flight attendant mid plane..to be sure that doesn't happen. The crew up front had no idea what was happening. One big guy started it..then a bunch of others followed his lead. could have gotten ugly... One man stepped in and questioned those rule breakers.. nothing bad happened,,,but......

Wonderful staff who honored sleepy overnight travelers and still met needs quietly and quickly!

Wonderful respectful staff for a short flight late at night...lots of considerations all met!

I was expecting better service from Alaska Airlines. I registered for assistance since I have a disability. The terminal in Seattle, WA was very unprofessional and at times rude. The BWI location was the exact opposite. I will NOT consider Alaska Airlines for future flights.

Flight was delayed which led to missed connection, but rebooked on a more direct flight at the last minute and arrived in Juneau on time with all our luggage. Little stressful and our family seating got split, but it all worked out in the end.

It was very good and comfortable, Crew was also great

Flight was delayed 5 hours. Missed connecting flight. Very little apology or attempt to make anything better. Got a $150 credit for next flight. There won’t be another flight. First time on Alaska - last time. Keep your credit. Should have done something more

So much better coming back to Seattle than my trip TO Chicago. This crew actually communicated with the passengers!! Rebecca, one of the crew, stopped and visited with me about sign language. She should get a bonus of some kind!! She's a very neat gal!! It was still warm inside the plane, but it was packed! I still think you could do better than those teeny tiny pretzels! These were spicy and tasted terrible! All in all, still a better ride coming home. Go Seahawks!!

Arrival delay waiting for another flight to be towed and deboarded

In GEG I arrived at 0930 for a 1600 flight. Alaska had a rule that you could not check your bags until 4 hours before flight time. I was forced to sit in a chilly lobby for hours. I had access to a bathroom, but could not go into terminal for food and drink. Boarding and flight OK

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Sat on tarmac for 2 hours and then missed my connecting flight

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Everything was on time. I was disappointed by the front section female, African American flight attendant. I did not see her name tag or would have identified by name not race. As passengers moved to the bathroom early in flight, she would say with a disdainful tone “I have to say the seat belt light is on” then go back to her book. Better trained flight attendants say something like be careful the seat belt light is on.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Flight was an hour late, who knows why. It was OK, nothing outstanding.

Only not having an assigned seat was an issue. Rest was great

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

I like for how they process during check in. It was very smoothly.

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

My flight was scheduled for about 6:05 departure. There were 11 gate changes from 4-7pm and the flight was 3 hours delayed due to operational issues. The plane taxied around the airport for about half an hour before stopping to be de-iced. It would have been nice if we were alerted of the plan to de-ice prior to the 30 minute drive around the airport. The flight attendant was friendly, which was the only redeeming thing about this flight. As a former flight attendant for United, I was extremely disappointed.

Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.

You were more on time than United. I'm so over united delays.

The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.

I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Book cheap flights from Illinois to Idaho

Recent round-trip flight deals

10/12Sun
1 stopFrontier
6h 53mORD-BOI
10/16Thu
1 stopFrontier
10h 05mBOI-ORD
$170
9/18Thu
1 stopFrontier
6h 58mORD-GEG
9/21Sun
1 stopFrontier
10h 06mGEG-ORD
$171
9/8Mon
nonstopAmerican Airlines
3h 11mORD-JAC
9/11Thu
nonstopAmerican Airlines
3h 15mJAC-ORD
$191
9/27Sat
1 stopDelta
7h 27mORD-GEG
10/4Sat
1 stopDelta
6h 25mGEG-ORD
$195
9/16Tue
1 stopDelta
6h 25mORD-GEG
9/20Sat
2 stopsDelta
9h 16mGEG-ORD
$200
9/8Mon
1 stopAmerican Airlines
7h 24mORD-JAC
9/11Thu
nonstopAmerican Airlines
3h 15mJAC-ORD
$201
9/17Wed
1 stopSouthwest
8h 45mMDW-GEG
9/24Wed
1 stopSouthwest
7h 50mGEG-MDW
$215
8/28Thu
nonstopUnited Airlines
3h 12mORD-JAC
9/4Thu
1 stopUnited Airlines
5h 22mJAC-ORD
$220
9/17Wed
2 stopsSouthwest
8h 55mMDW-GEG
9/24Wed
1 stopSouthwest
7h 50mGEG-MDW
$220
7/12Sat
nonstopUnited Airlines
3h 15mORD-JAC
9/30Tue
1 stopUnited Airlines
6h 41mJAC-ORD
$235

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Recent one-way flight deals

8/28Thu
1 stopFrontier
6h 38mORD-BOI
$69
8/21Thu
1 stopFrontier
6h 57mORD-GEG
$69
8/20Wed
1 stopDelta
9h 30mORD-GEG
$98
8/2Sat
nonstopSouthwest
3h 55mMDW-GEG
$98
9/3Wed
2 stopsDelta
10h 30mORD-GEG
$103
9/17Wed
1 stopSouthwest
7h 10mMDW-GEG
$108
9/15Mon
nonstopAmerican Airlines
3h 13mORD-JAC
$110
8/27Wed
nonstopAmerican Airlines
3h 54mORD-GEG
$110
9/3Wed
nonstopUnited Airlines
4h 12mORD-GEG
$124
11/21Fri
1 stopUnited Airlines
8h 05mORD-GEG
$128

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Last minute flights from Illinois to Idaho

Last minute flight, train and bus deals

7/3Thu
multi-stopFrontier
7h 07mORD-BOI
7/6Sun
multi-stopFrontier
10h 34mBOI-ORD
$214
7/2Wed
multi-stopDelta
5h 26mORD-BOI
7/5Sat
multi-stopDelta
9h 13mBOI-ORD
$275
7/4Fri
nonstopAmerican Airlines
3h 56mORD-BOI
7/7Mon
nonstopAmerican Airlines
3h 37mBOI-ORD
$316
7/4Fri
nonstopAmerican Airlines
3h 56mORD-BOI
7/7Mon
multi-stopAmerican Airlines
7h 01mBOI-ORD
$326
7/4Fri
nonstopSouthwest
3h 55mMDW-GEG
7/8Tue
multi-stopSouthwest
8h 05mGEG-MDW
$331
7/4Fri
multi-stopSouthwest
10h 55mMDW-GEG
7/8Tue
multi-stopSouthwest
8h 05mGEG-MDW
$346
7/4Fri
multi-stopUnited Airlines
6h 43mORD-GEG
7/7Mon
nonstopUnited Airlines
3h 39mGEG-ORD
$382
7/4Fri
nonstopUnited Airlines
4h 07mORD-BOI
7/7Mon
multi-stopUnited Airlines
10h 00mBOI-ORD
$386
7/5Sat
nonstopAlaska Airlines
4h 00mORD-GEG
7/8Tue
multi-stopAlaska Airlines
7h 56mGEG-ORD
$452
7/4Fri
nonstopAlaska Airlines
4h 04mORD-GEG
7/9Wed
multi-stopAlaska Airlines
9h 03mGEG-ORD
$479

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Everything you need to know for your flight to Idaho

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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