How many flights depart from Boise to Illinois on average per week?

As of June 2026, 71 flights take off from Boise and land in Illinois each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Illinois?

Delta, Frontier, and Alaska Airlines are the most popular carriers operating from Boise Air Term. Gowen Fld to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Boise according to our data. United Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Boise to Illinois on average per day?

10 flights are operational daily from Boise to Illinois as of June 2026. The most popular departure time for this route is 8:00AM, with 53% of flights per day taking off in the afternoon.

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

Prices for flights from Boise Air Term. Gowen Fld Airport to Illinois were last updated today.

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

As of June 2026, there are 5 operators available to choose from for flights from Boise Air Term. Gowen Fld Airport to Illinois.

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

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 Boise Air Term. Gowen Fld Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$114 Cheap Flights from Boise to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boise to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 1:33 pm

BOI

STL

6h 33m

1 stop

6:30 am - 12:42 pm

STL

BOI

7h 12m

1 stop

$263Delta

Tue, Sep 29 - Tue, Oct 6

2:20 pm - 10:45 pm

BOI

STL

7h 25m

1 stop

8:35 am - 4:00 pm

STL

BOI

8h 25m

2 stops

$279Southwest

Tue, Sep 29 - Tue, Oct 6

1:25 pm - 6:53 pm

BOI

STL

28h 28m

1 stop

8:08 pm - 12:29 pm

STL

BOI

17h 21m

1 stop

$289Frontier

Thu, Jul 2 - Wed, Jul 8

1:25 pm - 6:53 pm

BOI

STL

28h 28m

1 stop

8:08 pm - 12:29 pm

STL

BOI

17h 21m

1 stop

$299Frontier

Thu, Jul 2 - Wed, Jul 8

3:10 pm - 7:59 pm

BOI

ORD

3h 49mnonstop

3:49 pm - 11:21 pm

ORD

BOI

8h 32m

1 stop

$335American Airlines

Wed, Jul 8 - Tue, Jul 14

8:47 pm - 6:20 am

BOI

ORD

8h 33m

1 stop

6:00 am - 12:26 pm

ORD

BOI

7h 26m

1 stop

$339Alaska Airlines

Tue, Jul 7 - Tue, Jul 14

4:27 pm - 11:59 pm

BOI

ORD

6h 32m

1 stop

6:20 am - 1:46 pm

ORD

BOI

8h 26m

1 stop

$345Alaska Airlines

Wed, Jul 8 - Thu, Jul 16

3:12 pm - 12:15 am

BOI

PIA

8h 03m

1 stop

4:43 pm - 11:21 pm

PIA

BOI

7h 38m

1 stop

$426American Airlines

Sat, Jul 4 - Fri, Jul 10

6:55 pm - 10:14 am

BOI

MLI

14h 19m

2 stops

1:00 pm - 9:16 pm

MLI

BOI

9h 16m

2 stops

$429United Airlines

Tue, Oct 27 - Sat, Oct 31

6:55 pm - 10:21 am

BOI

PIA

14h 26m

2 stops

8:50 am - 1:30 pm

PIA

BOI

5h 40m

1 stop

$434United Airlines

Tue, Oct 27 - Sat, Oct 31

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Boise to Illinois

Our best United Airlines deals on Boise to Illinois flight tickets

United Airlines

Jul 1

BOI5:46 pmBoise Air Term. Gowen Fld

5h 58m

1 stop

ORD12:44 amChicago O'Hare Intl

Jul 8

ORD8:40 amChicago O'Hare Intl

3h 52m

BOI11:32 amBoise Air Term. Gowen Fld

$349

United Airlines

Aug 7

BOI12:34 pmBoise Air Term. Gowen Fld

3h 31m

ORD5:05 pmChicago O'Hare Intl

Aug 9

ORD8:40 amChicago O'Hare Intl

3h 52m

BOI11:32 amBoise Air Term. Gowen Fld

$385

United Airlines

Sep 1

BOI5:44 pmBoise Air Term. Gowen Fld

4h 56m

1 stop

STL11:40 pmLambert-St Louis

Sep 2

STL8:42 amLambert-St Louis

7h 49m

1 stop

BOI3:31 pmBoise Air Term. Gowen Fld

$393

Frontier flights from Boise to Illinois

Our best Frontier deals on Boise to Illinois flight tickets

Frontier

Jul 2

BOI1:25 pmBoise Air Term. Gowen Fld

28h 28m

1 stop

STL6:53 pmLambert-St Louis

Jul 8

STL8:08 pmLambert-St Louis

17h 21m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$289

Frontier

Jul 2

BOI1:25 pmBoise Air Term. Gowen Fld

28h 28m

1 stop

STL6:53 pmLambert-St Louis

Jul 8

STL8:08 pmLambert-St Louis

17h 21m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$299

Frontier

Jul 30

BOI1:24 pmBoise Air Term. Gowen Fld

4h 59m

1 stop

STL7:23 pmLambert-St Louis

Aug 8

STL8:08 pmLambert-St Louis

17h 21m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$313

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 9/29

6:00 am-1:33 pm

1 stop6h 33m

Lambert-St Louis

Tue 10/6

6:30 am-12:42 pm

1 stop7h 12m

$263

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 9/29

2:20 pm-10:45 pm

1 stop7h 25m

Lambert-St Louis

Tue 10/6

8:35 am-4:00 pm

2 stops8h 25m

$279

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 7/2

1:25 pm-6:53 pm

1 stop28h 28m

Lambert-St Louis

Wed 7/8

8:08 pm-12:29 pm

1 stop17h 21m

$289

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 7/2

1:25 pm-6:53 pm

1 stop28h 28m

Lambert-St Louis

Wed 7/8

8:08 pm-12:29 pm

1 stop17h 21m

$299

Quickest round-trip

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Wed 7/8

3:10 pm-7:59 pm

Nonstop3h 49m

Chicago O'Hare Intl

Tue 7/14

3:49 pm-11:21 pm

1 stop8h 32m

$335

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Tue 7/7

8:47 pm-6:20 am

1 stop8h 33m

Chicago O'Hare Intl

Tue 7/14

6:00 am-12:26 pm

1 stop7h 26m

$339

BoiseChicago

BOI - ORD

BOIORD

Boise Air Term. Gowen Fld

Wed 7/8

4:27 pm-11:59 pm

1 stop6h 32m

Chicago O'Hare Intl

Thu 7/16

6:20 am-1:46 pm

1 stop8h 26m

$345

BoisePeoria

BOI - PIA

BOIPIA

Boise Air Term. Gowen Fld

Sat 7/4

3:12 pm-12:15 am

1 stop8h 03m

Greater Peoria

Fri 7/10

4:43 pm-11:21 pm

1 stop7h 38m

$426

BoiseMoline

BOI - MLI

BOIMLI

Boise Air Term. Gowen Fld

Tue 10/27

6:55 pm-10:14 am

2 stops14h 19m

Moline Quad-City

Sat 10/31

1:00 pm-9:16 pm

2 stops9h 16m

$429

BoisePeoria

BOI - PIA

BOIPIA

Boise Air Term. Gowen Fld

Tue 10/27

6:55 pm-10:21 am

2 stops14h 26m

Greater Peoria

Sat 10/31

8:50 am-1:30 pm

1 stop5h 40m

$434

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boise to Illinois

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Boise is in July. Flight prices, which tend to average around $87, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of July, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $109.

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

The cheapest day to depart from Boise to Illinois is on a Thursday when prices can be found for as low as $472. Flights from Boise to Illinois on a Sunday will generally be more expensive and average around $683. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Boise to Illinois during this time can be as low as $433. Flights in the morning are often more expensive with an average ticket price of $622.

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

Fly from Boise Air Term. Gowen Fld to Chicago O'Hare Intl for the best Boise Air Term. Gowen Fld - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Boise when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $402 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Boise for as low as $333 on momondo.

What cabin class options are available on Boise to Illinois flights?

There are 4 cabin classes available to choose from on Boise to Illinois 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 Boise to Illinois flights?

You could potentially save up to 26% on your flight if you consider stops on a Boise to Illinois flight.

Cheap Boise to Illinois flight deals and tips

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

Best Price Found	$236
Fastest flight time	3h 20m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Illinois	98 airports

The best one-way flight to Illinois from Boise in the past 72 hours is $236. The best round-trip flight deal from Boise to Illinois found on momondo in the last 72 hours is $417.

The fastest flight from Boise to Illinois takes 3h 20m

Direct flights go from Boise to Illinois on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. The only airline offering direct flights is Southwest.

There are 98 airports in Illinois. From Boise there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from Boise to Illinois

When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Illinois?
Prices for flights from Boise Air Term. Gowen Fld Airport to Illinois were last updated today.
How many operators does momondo search for flights from Boise Air Term. Gowen Fld Airport to Illinois?
As of June 2026, there are 5 operators available to choose from for flights from Boise Air Term. Gowen Fld Airport to Illinois.
How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Illinois?
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 Boise Air Term. Gowen Fld Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Boise to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Boise to Illinois is Embraer 175 (Enhanced Winglets) (31.26% of total bookings). The next most popular plane models are Boeing 737-800 (20.13%), Airbus A319 (19.49%), and Boeing 737 MAX 9 (8.14%).

Best airlines flying from Boise to Illinois

Compare and see reviews for airlines that fly from Boise to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $168	Free Cancellation	Rating 7.9 8,394 reviews	Search Delta flights
Alaska Airlines	PriceFrom $224	Free Cancellation	Rating 7.9 12,484 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $234	Free Cancellation	Rating 7.9 4,240 reviews	Search Southwest flights
United Airlines	PriceFrom $239	Free Cancellation	Rating 7.4 9,796 reviews	Search United Airlines flights
American Airlines	PriceFrom $269	Free Cancellation	Rating 7.1 11,640 reviews	Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boise to Illinois. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Boise to Illinois 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 Boise to Illinois?

Once all potential Boise to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Boise to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Thu 7/9

Thu 7/16

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities

Other flights from Boise

Other flights to Illinois

Airlines

Complete your trip

Feeling lucky

Popular cities in Illinois

Flights to New Yorkfrom $72

Flights to Los Angelesfrom $49

Flights to Orlandofrom $64

Flights to Miamifrom $79

Flights to Chicagofrom $73

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $58

Flights to Bostonfrom $75

Flights to Atlantafrom $66

Flights to Fort Lauderdalefrom $55

Flights to Dallasfrom $82

Cheap flights from Boise to Illinois from $114

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to Illinois departing on 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Boise to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from Boise to Illinois

Our best United Airlines deals on Boise to Illinois flight tickets

Frontier flights from Boise to Illinois

Our best Frontier deals on Boise to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Boise to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Boise to Illinois

What is the cheapest month to fly to Illinois?

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

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

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

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

What cabin class options are available on Boise to Illinois flights?

Can stopping save me money on Boise to Illinois flights?

What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Illinois?

What airlines fly to Illinois?

How many flights depart from Boise to Illinois on average per day?

How many flights depart from Boise to Illinois on average per week?

Cheap Boise to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Boise to Illinois

Best airlines flying from Boise to Illinois

Compare and see reviews for airlines that fly from Boise to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo

Boise flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Illinois

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Illinois

Explore popular destinations other users love

According to popular flight searches on momondo this year