Cheap flights from Idaho (ID) to Illinois (IL)

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How to find the cheapest flight from
Idaho to Illinois

All the information you need to plan the best null to ORD flight in 2021: compare Idaho to Illinois flight prices with the expected peak season, weather and rainfall in Illinois.
What is the cheapest month to fly from Idaho to Illinois?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, April can be a great choice for travel to Illinois. Flights to Illinois from Idaho in April are about $364 on average during April, but can be found for as low as $211.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 27 days in advance, which can save you up to 46% on flights from Idaho to Illinois compared to booking the week you need them. Waiting 27 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $415. For sooner than that we have options available in the next 3 days from $525.

When is the cheapest time to fly from Idaho to Illinois (ID - IL)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Illinois as you normally would.

Cheap flights from Idaho to Illinois in December, January 2022

The best prices found for Idaho to Illinois flights for December, January
7 Jan - 9 Jan
$181pp
GEG
Spokane
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
GEG
Spokane
21 Jan - 24 Jan
$188pp
BOI
Boise Air Term. Gowen Fld
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Alaska Airlines
 
1 STOP
BOI
Boise Air Term. Gowen Fld
31 Jan - 2 Feb
$189pp
BOI
Boise Air Term. Gowen Fld
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
BOI
Boise Air Term. Gowen Fld

Idaho to Illinois 2022 flight deals

Cheap flights to Illinois from Idaho found for this year
13 Dec - 15 Dec
$318pp
GEG
Spokane
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
GEG
Spokane
13 Dec - 15 Dec
$320pp
GEG
Spokane
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
     
3 STOPS
GEG
Spokane
13 Dec - 15 Dec
$323pp
GEG
Spokane
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Delta
 
1 STOP
GEG
Spokane

Non-stop flights to Illinois from Idaho

Save time with Idaho to Illinois direct flight deals
14 Jan - 16 Jan
$197pp
BOI
Boise Air Term. Gowen Fld
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
BOI
Boise Air Term. Gowen Fld
14 Jan - 19 Jan
$207pp
BOI
Boise Air Term. Gowen Fld
Multiple Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
BOI
Boise Air Term. Gowen Fld
12 Jan - 16 Jan
$247pp
BOI
Boise Air Term. Gowen Fld
United Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
BOI
Boise Air Term. Gowen Fld

Last minute flights from Idaho to Illinois

Late deals on round-trip flights to Illinois from Idaho, departing today and this week
13 Dec - 15 Dec
$318pp
GEG
Spokane
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
GEG
Spokane
13 Dec - 15 Dec
$320pp
GEG
Spokane
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
     
3 STOPS
GEG
Spokane
13 Dec - 15 Dec
$323pp
GEG
Spokane
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Delta
 
1 STOP
GEG
Spokane

One-way flights to Illinois from Idaho

The cheapest one-way flights from Idaho to Illinois
6:05 am - 2:20 pm
Alaska Airlines
1 Stop
7h 15m
BOI - ORD
Alaska Airlines
3:12 pm - 1:02 am
Frontier
1 Stop
7h 50m
GEG - ORD
Frontier
$124
JustFly
4:10 pm - 12:24 am
Multiple Airlines
2 Stops
30h 14m
GEG - STL
Multiple Airlines
$143
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Idaho</span> to <span class="emphasized">Illinois</span> flights.

Flight FAQs

From Idaho to Illinois

Which airlines flying from Idaho to Illinois have flexible cancellations due to COVID-19?

Some of our airline partners flying from Idaho to Illinois have new flexible policies in place due to COVID-19. Delta, United Airlines, and Alaska Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Delta with this kind of flexibility.

Can I find flights from Idaho to Illinois for under $200 on Cheapflights?

Yes, there are multiple flights from Idaho to Illinois for under $200. The cheapest flight booked recently is on Multiple Airlines for just $181, but on average you can expect to pay $199.

Are there nonstop flights from Idaho to Illinois for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Idaho to Illinois under $200. A good price for a nonstop flight from Idaho to Illinois is less than $341.

Are there last-minute flights available from Idaho to Illinois for under $400?

There are currently 20+ open flights from Idaho to Illinois within the next 7 days for less than $400.

What days are nonstop flights available from Idaho to Illinois?

Nonstop flights can be found on the following days: Friday.

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

3 flight departures from Idaho to Illinois per day on average.
Morning (6am - Noon) - 100% of flight departures

How long is the flight from Idaho to Illinois?

Departing from Idaho to Illinois will take you 3h 25m. There are 1441 mi between Idaho and Illinois. This flight may include one or multiple stops.

What are the cheapest airlines to fly from Idaho to Illinois one-way?

$74 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $98 and $99, respectively.

COVID Restrictions

View COVID Travel Restrictions for Illinois (IL)

Do I need a COVID test to fly to Illinois from Idaho?

Information is based on travel restrictions for travel to Illinois within the United States

Most visitors from Idaho need to provide a negative COVID-19 test result and/or quarantine to enter Illinois.

COVID-19 testing requirements
Visitors from Idaho must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Illinois.

Quarantine requirements
Visitors from Idaho are not required to quarantine after entering Illinois.

Do I need a test to fly back to Idaho from Illinois?

Returning to Idaho from Illinois

COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Idaho.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering Idaho.

Hide COVID Travel Restrictions for Illinois (IL)

Destination points for flights from Idaho to Illinois

Select to see more specific information for flights from Idaho to all places in Illinois.

Destination information for Illinois

Things to know before you go - useful duration and weather info for your trip from Idaho to Illinois.
Flight duration from Idaho to Illinois
3h 38m

Airports servicing

Idaho Falls (IDA)
Lewiston (LWS)
Pocatello (PIH)
Hailey Sun Valley-Friedman (SUN)
Twin Falls (TWF)

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)

Top 5 airlines flying from Idaho to Illinois

The chart below displays the airlines Cheapflights users traveling from Idaho to Illinois choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$104 $159 No cancel fee 62%
Alaska Airlines
$147 $335 No cancel fee 75%
Delta
$150 $487 No cancel fee N/A
American Airlines
$230 $462 No cancel fee 71%
United Airlines
$244 $480 No cancel fee 69%
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