Cheap flights from Illinois to Idaho from $95
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Idaho departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Illinois to Idaho
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Idaho?
In general, September is the cheapest month to fly from Illinois to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $332. If you don’t want to visit Idaho in September, then you should wait until August to fly from Illinois, when ticket prices are also cheap, with an average price of $357.
What is the cheapest day to depart on your flight to Idaho?
Our data shows that Saturday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $389. On the other hand, Monday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $619.
What is the cheapest time of day to depart on your flight to Idaho?
According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from Illinois to Idaho at noon for as low as $327. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Idaho, so prices are often more expensive at around $575 per ticket.
What is the cheapest Illinois to Idaho flight route?
Fly from Chicago O'Hare Intl to Boise Air Term. Gowen Fld for the best Illinois - Idaho flight prices
How far in advance should I book a flight to Idaho?
You are more likely to see cheaper flights to Idaho from Illinois when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $410 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Illinois for as low as $254 on momondo.
What cabin class options are available on Illinois to Idaho flights?
There are 4 cabin classes available to choose from on Illinois to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Illinois to Idaho?
Spirit Airlines, Frontier, and Alaska Airlines are the most popular carriers operating from Illinois to Idaho
What airlines fly to Idaho?
United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Idaho from Illinois according to our data. United Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 6 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Idaho on average per day?
As of June 2025, 19 flights take off from Illinois and land in Idaho each day. The most common flight departure time for this route is 7:00PM, with 52% of daily flights taking off in the evening.
How many flights depart from Illinois to Idaho on average per week?
As of June 2025, there are 138 flights per week flying from Illinois to Idaho. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.
Cheap Illinois to Idaho flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Idaho
When did momondo last update prices for flights from Illinois to Idaho?
Prices for flights from Illinois to Idaho were last updated today.
How many operators does momondo search for flights from Illinois to Idaho?
As of June 2025, there are 6 operators available to choose from for flights from Illinois to Idaho.
How old do you have to be to fly from Illinois to Idaho?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Idaho.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to Idaho?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Illinois to Idaho is Embraer 175 (Enhanced Winglets) (38.28% of total bookings). The next most popular plane models are Airbus A319 (25.69%), Embraer 175 (18.62%), and Airbus A320-100/200 (4.66%).
Best airlines flying from Illinois to Idaho
Compare and see reviews for airlines that fly from Illinois to Idaho with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $104 | Free Cancellation | Rating 6.3 8,061 reviews | |||
| PriceFrom $174 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $204 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $237 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 8.0 4,278 reviews | |||
| PriceFrom $271 | Free Cancellation | Rating 7.4 8,801 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Idaho?
It is quick and easy to find Illinois to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.
Can I find flights from Illinois to Idaho with flexible booking policies on momondo?
Flights from Illinois to Idaho with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Illinois to Idaho?
momondo provides multiple filters to help you find the best flight to Idaho from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Illinois to Idaho right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Illinois to Idaho flights. All you need is a valid email address and we will do the rest; it is that quick and easy.