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Cheap flights from Illinois to Boise from $75

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 Boise departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Boise

Cheap round-trip flights

Frontier Logo
7:55 pm - 11:37 amSTL-BOI
16h 42m1 stop
Frontier Logo
12:22 pm - 9:06 amBOI-STL
19h 44m1 stop
$201Frontier
Find Deal
qui, set 18 - dom, set 21
Delta Logo
5:30 am - 12:30 pmORD-BOI
8h 00m1 stop
Delta Logo
8:55 am - 9:19 pmBOI-ORD
11h 24m2 stops
$230Delta
Find Deal
dom, set 21 - sáb, out 11
Alaska Airlines Logo
8:00 am - 1:48 pmORD-BOI
6h 48m1 stop
Alaska Airlines Logo
4:34 pm - 12:03 amBOI-ORD
6h 29m1 stop
$231Alaska Airlines
Find Deal
qua, set 10 - qua, set 10
Logo
8:25 am - 11:37 amORD-BOI
28h 12m1 stop
Logo
9:26 pm - 9:32 pmBOI-ORD
23h 06m1 stop
$232
Find Deal
sáb, set 13 - seg, set 15
Delta Logo
7:15 am - 7:05 pmORD-BOI
12h 50m2 stops
Delta Logo
5:45 am - 1:20 pmBOI-ORD
6h 35m1 stop
$233Delta
Find Deal
sáb, ago 30 - ter, set 16
Hawaiian Airlines Logo
3:20 pm - 10:20 pmORD-BOI
8h 00m1 stop
Hawaiian Airlines Logo
8:50 pm - 6:22 amBOI-ORD
8h 32m1 stop
$234Hawaiian Airlines
Find Deal
sex, out 31 - seg, nov 3
Alaska Airlines Logo
8:00 am - 1:48 pmORD-BOI
6h 48m1 stop
Alaska Airlines Logo
8:42 pm - 7:03 amBOI-ORD
9h 21m1 stop
$235Alaska Airlines
Find Deal
ter, set 9 - dom, set 14
Spirit Airlines Logo
9:00 am - 8:31 pmORD-BOI
12h 31m1 stop
Spirit Airlines Logo
9:26 pm - 1:09 pmBOI-ORD
14h 43m2 stops
$238Spirit Airlines
Find Deal
seg, set 8 - seg, set 15
Spirit Airlines Logo
6:35 am - 7:56 pmORD-BOI
14h 21m1 stop
Spirit Airlines Logo
8:58 pm - 7:52 pmBOI-ORD
21h 54m2 stops
$241Spirit Airlines
Find Deal
sex, out 31 - seg, nov 3
Logo
7:00 am - 12:50 pmORD-BOI
6h 50m1 stop
Logo
12:22 pm - 11:59 pmBOI-ORD
10h 37m1 stop
$245
Find Deal
sáb, ago 30 - dom, set 14

United Airlines flights from Illinois to Boise

Our best United Airlines deals on Illinois to Boise flight tickets
United Airlines
Aug 27
ORD8:45 amChicago O'Hare Intl
3h 46m
BOI11:31 amBoise Air Term. Gowen Fld
Sep 17
BOI8:20 amBoise Air Term. Gowen Fld
3h 49m
ORD1:09 pmChicago O'Hare Intl
$343
Find similar
United Airlines
Aug 27
ORD6:15 amChicago O'Hare Intl
8h 34m
1 stop
BOI1:49 pmBoise Air Term. Gowen Fld
Sep 17
BOI8:20 amBoise Air Term. Gowen Fld
3h 49m
ORD1:09 pmChicago O'Hare Intl
$349
Find similar
United Airlines
Sep 13
STL5:15 amLambert-St Louis
9h 15m
2 stops
BOI1:30 pmBoise Air Term. Gowen Fld
Sep 20
BOI2:42 pmBoise Air Term. Gowen Fld
5h 04m
1 stop
STL8:46 pmLambert-St Louis
$364
Find similar

Frontier flights from Illinois to Boise

Our best Frontier deals on Illinois to Boise flight tickets
Frontier
Sep 18
STL7:55 pmLambert-St Louis
16h 42m
1 stop
BOI11:37 amBoise Air Term. Gowen Fld
Sep 21
BOI12:22 pmBoise Air Term. Gowen Fld
19h 44m
1 stop
STL9:06 amLambert-St Louis
$201
Find similar
Frontier
Sep 21
ORD6:00 amChicago O'Hare Intl
6h 37m
1 stop
BOI11:37 amBoise Air Term. Gowen Fld
Oct 12
BOI12:28 pmBoise Air Term. Gowen Fld
10h 25m
1 stop
ORD11:53 pmChicago O'Hare Intl
$259
Find similar
Frontier
Aug 28
ORD6:00 amChicago O'Hare Intl
6h 38m
1 stop
BOI11:38 amBoise Air Term. Gowen Fld
Sep 11
BOI12:22 pmBoise Air Term. Gowen Fld
10h 37m
1 stop
ORD11:59 pmChicago O'Hare Intl
$285
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Boise that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated agosto 18, 2025.
Use the filters below to find and compare flights from Illinois to Boise that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

qui 9/18

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

dom 9/21

12:22 pm-9:06 am

1 stop19h 44m

$201

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

dom 9/21

5:30 am-12:30 pm

1 stop8h 00m

Boise Air Term. Gowen Fld

sáb 10/11

8:55 am-9:19 pm

2 stops11h 24m

$230

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

qua 9/10

8:00 am-1:48 pm

1 stop6h 48m

Boise Air Term. Gowen Fld

qua 9/10

4:34 pm-12:03 am

1 stop6h 29m

$231

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb 9/13

8:25 am-11:37 am

1 stop28h 12m

Boise Air Term. Gowen Fld

seg 9/15

9:26 pm-9:32 pm

1 stop23h 06m

$232

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb 8/30

7:15 am-7:05 pm

2 stops12h 50m

Boise Air Term. Gowen Fld

ter 9/16

5:45 am-1:20 pm

1 stop6h 35m

$233

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sex 10/31

3:20 pm-10:20 pm

1 stop8h 00m

Boise Air Term. Gowen Fld

seg 11/3

8:50 pm-6:22 am

1 stop8h 32m

$234

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

ter 9/9

8:00 am-1:48 pm

1 stop6h 48m

Boise Air Term. Gowen Fld

dom 9/14

8:42 pm-7:03 am

1 stop9h 21m

$235

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

seg 9/8

9:00 am-8:31 pm

1 stop12h 31m

Boise Air Term. Gowen Fld

seg 9/15

9:26 pm-1:09 pm

2 stops14h 43m

$238

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sex 10/31

6:35 am-7:56 pm

1 stop14h 21m

Boise Air Term. Gowen Fld

seg 11/3

8:58 pm-7:52 pm

2 stops21h 54m

$241

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

sáb 8/30

7:00 am-12:50 pm

1 stop6h 50m

Boise Air Term. Gowen Fld

dom 9/14

12:22 pm-11:59 pm

1 stop10h 37m

$245

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Boise from

How to get the cheapest flight ticket from Illinois to Boise

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 Boise?

The month of September is, on average, the cheapest month to fly to Boise from Illinois, with most prices found around $326. If you aren’t able to travel during the month of September, then book flights to Boise from Illinois during August instead. Flights to Boise in August, while not as cheap as those in September, still average around $357.

What is the cheapest day to depart on your flight to Boise?

Our data shows that Saturday is the least expensive day to fly to Boise. Tickets to fly out on this day can be as low as $395. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $519. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boise.

What is the cheapest time of day to depart on your flight to Boise?

Our data shows that the cheapest Illinois to Boise flights are usually those with departure times at noon. Our users have found flights to Boise at noon for as low as $275. In the evening is when there is more demand to fly to Boise, so prices are often more expensive at around $571 per ticket.

What is the cheapest Illinois to Boise Air Term. Gowen Fld flight route?

Fly from Chicago Midway to Boise Air Term. Gowen Fld for the best Illinois - Boise Air Term. Gowen Fld flight prices

How far in advance should I book a flight to Boise?

You are more likely to see cheaper flights to Boise from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Boise for around $395 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boise from Illinois for as low as $254 on momondo.

What cabin class options are available on Illinois to Boise Air Term. Gowen Fld flights?

There are 4 cabin classes available to choose from on Illinois to Boise Air Term. Gowen Fld flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Boise flights?

No. A direct flight is the cheapest option for a flight between Illinois to Boise.

Cheap Illinois to Boise flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Boise

Best Price Found

$75

Fastest flight time

3h 42m

Direct flights

Every day

Airports in Boise

1 airport
The best one-way flight to Boise from Illinois in the past 72 hours is $75. The best round-trip flight deal from Illinois to Boise found on momondo in the last 72 hours is $201.
The fastest flight from Illinois to Boise takes 3h 42m
Direct flights go from Illinois to Boise every day.
There is 1 airport near Boise: Boise Air Term. Gowen Fld (BOI)
Search flight deals

  • When did momondo last update prices for flights from Illinois to Boise Air Term. Gowen Fld Airport?

    Prices for flights from Illinois to Boise Air Term. Gowen Fld Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Illinois to Boise Air Term. Gowen Fld Airport?

  • How old do you have to be to fly from Illinois to Boise Air Term. Gowen Fld Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Boise Air Term. Gowen Fld Airport.

  • What documentation or ID do you need to fly to Boise Air Term. Gowen Fld Airport?

    The travel and health documents you'll need for your trip to Boise Air Term. Gowen Fld Airport 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 Boise Air Term. Gowen Fld Airport. 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 Boise?

Best airlines flying from Illinois to Boise

Compare and see reviews for airlines that fly from Illinois to Boise with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $174Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Alaska AirlinesPriceFrom $227Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $237Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
Nampa
Meridian
McCall
Caldwell
Ontario
Eagle

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Boise?

Finding the right flight to Boise from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Boise quick and easy, saving you time and money.

Can I find flights from Illinois to Boise with flexible booking policies on momondo?

Flights from Illinois to Boise 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 Boise?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Boise.

I’m not ready to book a flight from Illinois to Boise right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Boise now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Boise and let you know when they change.

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