$138 Find Cheap Flights from Idaho to Illinois - Compare and Save

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Low season

January

Cheapest flight

$138
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Boise to Chicago O'Hare Airport

FAQs for booking flights from Idaho to Illinois

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Idaho 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 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 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 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 to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines fly most frequently to Illinois?

    American Airlines connects Idaho to Illinois with 14 flights per week. Air Canada also offers 14 flights per week, while Lufthansa follows with 14 flights per week.

  • How many airports are there in Illinois?

    There are 12 airports in Illinois. The busiest airport is Chicago O'Hare Airport (ORD), with 92% of all flights arriving there.

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

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Chicago O'Hare Intl Airport (ORD), with an average flight price of $355.

  • What is the cheapest day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Wednesday where round-trip tickets can be as cheap as $521. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $747 on average.

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

    The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $435 on average. Morning departures are around 44% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $625.

  • What is the cheapest flight to Illinois?

    The cheapest ticket to Illinois from Idaho found in the last 5 days was to Chicago Midway Airport, at $294 round-trip. The most popular route is Boise (BOI) to Chicago Midway Airport (MDW) and the cheapest round-trip airline ticket found on this route in the last 5 days was $294.

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

    The cheapest month for flights from Idaho to Illinois is December, when tickets cost $213 (return) on average. On the other hand, the most expensive months are November and February, when the average cost of round-trip tickets is $438 and $323 respectively.

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

    To get a below average price on the flight from Idaho to Illinois, you should book around 4 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

  • How many cities have direct flights to Illinois?

    From Idaho, there are direct flights to Illinois from 2 cities. The city with the most direct flights is Boise, with 70 direct flights each week.

  • How many direct flights to Illinois are there each day?

    There are around 11 direct flights from within Idaho to Illinois every day. Most flights (64%) depart in the morning.

  • How many direct flights to Illinois are there each week?

    Each week there are around 77 direct flights from within Idaho to Illinois. The most common day for departures is Monday, with 14% of flights taking off on this day.

  • How long is the flight to Illinois?

    An average nonstop flight from Idaho to Illinois takes 8h 43m, covering a distance of 1359 miles. The shortest route is Jackson (JAC) to Chicago O'Hare Intl Airport (ORD) with an average flight time of 3h 09m.

  • How many long-haul flights are there to Illinois each week?

    There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to Illinois. Instead, there are 77 short-haul flights (up to 3 hour flight duration), with the most arriving from Boise.

  • What are the most popular destinations in Illinois?

    Based on KAYAK flight searches, the most popular destination is Chicago (87% of total searches to Illinois). The next most popular destinations are St. Louis (11%) and Peoria (2%).

Reviews of the top 5 airlines serving from Idaho to Illinois

 
Need help choosing which airline to fly with from Idaho 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.
7.9
Alaska AirlinesOverall score based on 13086 reviews
8.5Crew
7.0Entertainment
7.8Comfort
8.1Boarding
7.0Food
Airline reviews

Anything to make the customer experience better. Stop cancelling flights like people traveling have nothing better to do than have their life plans halted. People go to great lengths to get time off work, make plans at the end of their flights, make travel plans, go through the nightmare of checking in at busy stressful airports, make pick up arrangements only to have the rug pulled out from under them. Flying has become so miserable now!! The flights were delayed ONLY with American Airlines. The disorganization is sickening. After the flight being delayed multiple times, when the flight was finally broadcast that it was a go, EXCEPT, they were now waiting for flight attendants. They had plenty of time to plan this, what the heck?! Missed both connecting flights because it was so delayed. I vowed to never fly American Airlines again, did it and BOY was it a mistake!!! American Airlines ranks with United as two worst airlines.

2.0 MediocreAnonymous, Sep 2026
Read more Alaska Airlines reviews

Anything to make the customer experience better. Stop cancelling flights like people traveling have nothing better to do than have their life plans halted. People go to great lengths to get time off work, make plans at the end of their flights, make travel plans, go through the nightmare of checking in at busy stressful airports, make pick up arrangements only to have the rug pulled out from under them. Flying has become so miserable now!! The flights were delayed ONLY with American Airlines. The disorganization is sickening. After the flight being delayed multiple times, when the flight was finally broadcast that it was a go, EXCEPT, they were now waiting for flight attendants. They had plenty of time to plan this, what the heck?! Missed both connecting flights because it was so delayed. I vowed to never fly American Airlines again, did it and BOY was it a mistake!!! American Airlines ranks with United as two worst airlines.

Potatoes were not cooked in the pork potato meal. Flight attendants were great in first class.

I paid extra to choose my seat. I chose a window seat. I don’t know if it was a disconnect between KAYAK or the airline but when we got to the airport, the seat was changed to a middle seat. Didn’t notice it til at the gate. I called wanted a refund and was told that I didn’t choose the seat even though on my KAYAK reservation it showed seat 12 A. So I paid extra for seat selection, but didn’t get it. And also did not get a refund. I specifically pay the extra for a seat selection. I normally am very happy with Alaska Airlines. They are usually in my top three of choices.

The plane smelled like an aquarium. Many passengers noted it smelled like fish. We then sat on the plane for over 2 hours before taking off

Worst travel day of my life. First bumped from our 7am flight—that we booked to ensure enough time to get to Chicago and get ready to go to a concert. Ended up on a flight 5hours later only to arrive in Chicago and spend 2 hours sitting in the tarmac. Missed the concert ($650 in tickets) and was too late to cancel the hotel ($500). I did receive a $200 voucher for the next Alaska ticket—soooo generous 👎. Would LOVE if Alaska reimbursed the $1000+that I am out!

Only issue is that when you board last they make you check your carry on due to lack of space. Did not care for that.

Great with American Poor with Alaska airlines. 3 hrs isn’t enough to transfer bags from one gate to another 5-6 gates away in the same terminal. Bags essential for cruise were unavailable Flights delayed cascading the problem. (Alaska Airlines responsibility). Very poor execution of operations that should be the simplest aspect of travel.

My flight was several times rescheduled and then finally canceled.

The flight kept getting delayed due to a maintenance issue. That happens, but there is no excuse for changing the gate FIVE TIMES, including one time nearly all the way across SeaTac. After we were delayed for 3+ hours, they did send us (via email) a $12 meal voucher...except you can't find a $12 meal anywhere in that airport, unless you consider a bag of M&M's and a bottle of water a meal. The plane had one problem after another but finally took off 4.5 hours late. This caused us to miss our hotel shuttle at ORD (they didn't run past midnight and it was 3 am) so we had to wait 25 minutes and pay for an Uber. I did get a $50 flight voucher from Alaska...big deal. Barely covers my Uber ride that I shouldn't have needed.

It was good. Too long for older people. Service and support was great! Friendly crew!

The entire crew were wonderful but 1 flight attendant stood out with his sense of humor on the microphone. I told him as much as I exited the plane.

Maybe different snack selection. To much sodium in them. I know refrigerators are not available but there has to be healthier items.

Wasn't expecting this, but, we actually ended up getting assigned to the first row of seats!!!!! The extra legroom came in handy

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Great flight. I didn't get a drink because I was asleep whole on the flight.

Love them will get a Southwest card to track my points and keep flying with them. My family and I were pleased with the services.

Requested an aisle seat at the gate and got it. The staff so friendly

Flight was very delayed so I was able to get on an earlier flight via stand-by. Crew communicated effectively around delay and worked to make customers comfortable. Wifi was ok, streaming TV was great. App functionality broke down once I was moved to stand-by on earlier flight.

Sat in the tarmac at O’Hare for 65 minutes. This is a regular occurrence for delta at O’Hare

Delta was fine though my flight was delayed 4 hours into LGA and my return into ORD involved a taxi of 1+ hour to the gate

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Got on the plane and sat there for an hour before departure.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Cramped seating for me. Luckily it wasn’t a long flight

Requested for warm or hot water because of throat pain, it was denied. The entertainment system was hung, requested the crew to turn it off, instead of turning it off they rebooted the device. It was stuck again, no one bothered to check.

Horrible on the chicago end. They change hates then there is a plane at the new gate so we can’t pull in. Then that plane has mechanical issue and needs to be pulled back to the gate but we can’t get to another new gate due the other plane being in the way. Horrible gate management which will cause many customers to miss connections.

Fantastic experience once again flying with United! There was great communication from the cockpit and one of the flight attendants went out of her way to get my two little kids some special treats which elevated our travel experience coming home.

The employees seemed impatient with their guests. It seemed like they were giving us orders, instead of easily assisting. Our flight was delayed waiting on a flight attendant. It was alright.

My easiest trip ever. Flights left on time, and came in a few minutes early. The flights weren’t full so it was very comfortable. Thank you United

Quinoa chocolate cookies are my favorite! Would be nice to have internet service like American

Better management of the boarding process. Is there any way you could forward all the window seats first? That's the Way Reno Air used to do it, and they had the fastest boarding in the industry!

Old plane, no amenities. Very abrupt landing. Unnecessarily long taxi time.

We were delay because so many bags needed to be gate checked and it was disappointing not to have outlets in the seats for such a long flight.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

No food on 4.5 hour flight, wi-fi did not work. Terrible experience for a long haul flight.

The crew were diligent about ensuring that our pet dog remained in his carrier for the entire flight, as is their mandate. I wish that mandate was changed so that our poor, scared pets can be comforted during a flight, whereas service animals get to stay out and about for the whole flight. Thank you.

first leg from san diego to chicago, only had cookies for snack. 1 flavor of sparkling water chicago to washington dc had option of cookies, pretzels, or gold fish. had 2 flavors of sparkling water. 2nd flight better however the best part was there was no delays!!! Got to chicago and washington dc early. That was wonderful!!!!

Business class flight attendant was very good. But our flight was delayed two hours for a “mechanical” bathroom issue that literally took 5 minutes to fix. Our plane landed early from its previous flight but still waited for a mechanic to show up to fix an obvious minor issue for almost three hours. This caused us to miss our connecting flight. They put us up in a Days Inn that was 17 miles away from the airport that took a half hour of driving just to get to and this was at 11pm at night. Then when we finally got back on a plane after a full day delay they left our luggage back in the airport. This was an international flight, so no luggage or belongings after flying 8 hours to a different country. We will NEVER fly American Airlines again.

12 hour wait in pdx to my initial flight to Dallas to hunstville

The flight from Chicago to Orlando was delayed inordinately. My whole journey from Lansing to MCO took 9.5 hours is just annoying and frustrating. We can understand the delays may be beyond their control, but overall the journey was so much waiting until reached to MCO. This is NOT the first time for me - but at least 80% of the time in this route. I barely remember reaching places on time.

I was truly shocked at how poor this flight went. The crew was not friendly during the checking process. The asked for people to gate check and were rude about it. They didn't handle my luggage with care. When I got to my seat I noticed a large section of the ceiling vent area was, no joke, TAPED TOGETHER WITH CLEAR PACKING TAPE! To add insult to injury, the back rest button was disabled on my seat and all the seats I could see. The wifi, never connected for me, despite troubleshooting it for a while. I did everything from restarting my wifi/phone to forgetting the network and restarting the app. But that didn't stop the mandatory 2 ads from playing every single time. Even the bags took over 45 mins to arrive at the carousel. Everything about this flight was a flop and I am beginning to notice that some of these events are becoming a trend. Perhaps it's time I switch loyalty programs.

It would be helpful to be able to download an eticket from either American airlines or Cathay Pacific; not just Cathay Pacific.

Another American Airlines flight, another significant delay. At least this one wasn't canceled like many others have been. This time we sat on the runway at LaGuardia for 2.5 hours. By my count that is 7 American flights the last three months that have been delayed 2 hours or more or canceled entirely.

Flight was delayed because of mechanical. Could not get landing space which caused me to miss my connection. Messy and not organized.

More options for your flight to Illinois

Complete your trip to Illinois with a hotel stay or car rental