BOI

$117 Find Cheap Flights from Illinois to Boise - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Boise departing on 9/9. 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.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Illinois to Boise

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Boise 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Boise

Thu, Sep 10 - Thu, Sep 17
Frontier Logo
12:46 pm - 2:57 pm
STL
-
BOI
27h 11m
1 stop
Frontier Logo
12:59 pm - 7:15 pm
BOI
-
STL
5h 16m
1 stop
$308Frontier
Thu, Sep 24 - Sun, Sep 27
Frontier Logo
12:46 pm - 2:57 pm
STL
-
BOI
27h 11m
1 stop
Frontier Logo
12:59 pm - 7:15 pm
BOI
-
STL
5h 16m
1 stop
$311Frontier
Sat, Oct 17 - Fri, Oct 30
Alaska Airlines Logo
6:00 am - 12:35 pm
ORD
-
BOI
7h 35m
1 stop
Alaska Airlines Logo
4:19 pm - 11:59 pm
BOI
-
ORD
6h 40m
1 stop
$335Alaska Airlines
Wed, Jul 15 - Mon, Jul 20
Alaska Airlines Logo
6:00 am - 12:47 pm
ORD
-
BOI
7h 47m
1 stop
Alaska Airlines Logo
8:47 pm - 6:20 am
BOI
-
ORD
8h 33m
1 stop
$340Alaska Airlines
Thu, Aug 27 - Sun, Aug 30
Multiple Airlines Logo
8:17 pm - 2:02 pm
ORD
-
BOI
18h 45m
1 stop
Multiple Airlines Logo
1:04 pm - 8:53 pm
BOI
-
ORD
6h 49m
1 stop
$343Multiple Airlines
Tue, Jul 14 - Tue, Jul 21
Southwest Logo
6:55 pm - 12:35 am
MDW
-
BOI
6h 40m
1 stop
Southwest Logo
3:00 pm - 11:45 pm
BOI
-
MDW
7h 45m
1 stop
$345Southwest
Tue, Jul 14 - Tue, Jul 21
United Airlines Logo
8:40 am - 11:32 am
ORD
-
BOI
3h 52mnonstop
United Airlines Logo
12:34 pm - 5:05 pm
BOI
-
ORD
3h 31mnonstop
$345United Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:46 pm - 2:57 pm
STL
-
BOI
27h 11m
1 stop
Multiple Airlines Logo
2:08 pm - 11:59 pm
BOI
-
STL
8h 51m
1 stop
$345Multiple Airlines
Tue, Jul 14 - Tue, Jul 21
Southwest Logo
6:55 pm - 12:35 am
MDW
-
BOI
6h 40m
1 stop
Southwest Logo
1:05 pm - 11:00 pm
BOI
-
MDW
8h 55m
2 stops
$355Southwest
Sat, Nov 14 - Wed, Nov 18
United Airlines Logo
10:55 am - 11:59 pm
PIA
-
BOI
14h 04m
2 stops
United Airlines Logo
2:43 pm - 12:19 am
BOI
-
PIA
8h 36m
2 stops
$429United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$117
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Chicago O'Hare Airport to Boise

FAQs for booking flights from Illinois to Boise

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

    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 Boise.

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

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

    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 to Boise with an airline and back to Illinois with another airline.

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

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

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
McCall
Ontario

Everything you need to know for your flight to Boise

Information on the airport you'll fly into in Boise

Boise (BOI)