How long is the flight from Idaho to Missouri?

The flight from Idaho to Missouri depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Boise (a popular airport in Idaho) to St. Louis (the most popular airport in Missouri), then the flight time is 5h 01m on average. If you fly from Idaho Falls (another popular airport in Idaho) to St. Louis, then the average flight time is 5h 03m.

How many flights depart from Idaho to Missouri on average per week?

3 flights are operational weekly from Idaho to Missouri as of May 2026. The most popular departure day for this route is Mon, with 33% of flights per week taking off on this day.

What airlines fly to Missouri?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to Missouri from Idaho according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 5 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Idaho to Missouri?

Frontier, Delta, and Southwest are the most popular carriers operating from Idaho to Missouri

When did momondo last update prices for flights from Idaho to Missouri?

Prices for flights from Idaho to Missouri refresh daily.

How many operators does momondo search for flights from Idaho to Missouri?

The number of operators available for flights from Idaho to Missouri is 5 as of May 2026.

How old do you have to be to fly from Idaho to Missouri?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Missouri.

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

The required travel and health documents for your Missouri 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 Missouri. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$116 Cheap Flights from Idaho to Missouri in 2026

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Find the cheapest flights from Idaho to Missouri

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:25 pm - 1:00 pm

BOI

MCI

22h 35m

1 stop

1:45 pm - 12:30 pm

MCI

BOI

23h 45m

1 stop

$242Frontier

Tue, Jun 16 - Sat, Jun 20

1:04 pm - 7:23 pm

BOI

STL

5h 19m

1 stop

8:08 pm - 12:09 pm

STL

BOI

17h 01m

1 stop

$262Frontier

Tue, Sep 1 - Sat, Sep 5

12:40 pm - 10:21 pm

GEG

SGF

7h 41m

1 stop

6:00 am - 11:24 am

SGF

GEG

7h 24m

1 stop

$311Delta

Wed, Aug 26 - Tue, Sep 1

4:14 pm - 12:38 pm

IDA

MCI

19h 24m

1 stop

2:46 pm - 1:06 pm

MCI

IDA

23h 20m

1 stop

$319Alaska Airlines

Thu, Aug 27 - Sun, Aug 30

3:00 pm - 10:25 pm

BOI

MCI

6h 25m

1 stop

5:05 pm - 12:25 am

MCI

BOI

8h 20m

1 stop

$327Southwest

Tue, Jun 23 - Tue, Jun 30

1:43 pm - 10:29 pm

BOI

SGF

7h 46m

1 stop

3:30 pm - 10:41 pm

SGF

BOI

8h 11m

1 stop

$329Delta

Mon, Oct 5 - Sun, Oct 11

8:00 pm - 2:17 pm

BOI

MCI

17h 17m

1 stop

6:12 pm - 11:54 pm

MCI

BOI

6h 42m

1 stop

$347Alaska Airlines

Mon, Oct 12 - Tue, Oct 13

5:46 pm - 11:42 pm

BOI

SGF

4h 56m

1 stop

5:50 am - 9:45 am

SGF

BOI

4h 55m

1 stop

$355United Airlines

Sat, Jun 6 - Sun, Jun 14

2:25 pm - 11:15 pm

GEG

STL

6h 50m

1 stop

5:35 am - 11:45 am

STL

GEG

8h 10m

1 stop

$357Southwest

Tue, Jun 2 - Tue, Jun 9

5:46 pm - 11:57 pm

BOI

STL

5h 11m

1 stop

5:10 am - 9:45 am

STL

BOI

5h 35m

1 stop

$380United Airlines

Tue, Jun 9 - Tue, Jun 23

Southwest flights from Idaho to Missouri

Our best Southwest deals on Idaho to Missouri flight tickets

Southwest

Jun 23

BOI3:00 pmBoise Air Term. Gowen Fld

6h 25m

1 stop

MCI10:25 pmKansas City

Jun 30

MCI5:05 pmKansas City

8h 20m

1 stop

BOI12:25 amBoise Air Term. Gowen Fld

$327

Southwest

Jun 2

GEG2:25 pmSpokane

6h 50m

1 stop

STL11:15 pmLambert-St Louis

Jun 9

STL5:35 amLambert-St Louis

8h 10m

1 stop

GEG11:45 amSpokane

$357

Southwest

Jun 9

GEG12:25 pmSpokane

8h 45m

1 stop

MCI11:10 pmKansas City

Jun 16

MCI8:00 pmKansas City

6h 05m

1 stop

GEG12:05 amSpokane

$360

Delta flights from Idaho to Missouri

Our best Delta deals on Idaho to Missouri flight tickets

Delta

Aug 26

GEG12:40 pmSpokane

7h 41m

1 stop

SGF10:21 pmSpringfield-Branson

Sep 1

SGF6:00 amSpringfield-Branson

7h 24m

1 stop

GEG11:24 amSpokane

$311

Delta

Oct 5

BOI1:43 pmBoise Air Term. Gowen Fld

7h 46m

1 stop

SGF10:29 pmSpringfield-Branson

Oct 11

SGF3:30 pmSpringfield-Branson

8h 11m

1 stop

BOI10:41 pmBoise Air Term. Gowen Fld

$329

Delta

Jul 7

IDA7:00 pmIdaho Falls Fanning Field

4h 13m

1 stop

MCI12:13 amKansas City

Jul 15

MCI6:00 pmKansas City

5h 32m

1 stop

IDA10:32 pmIdaho Falls Fanning Field

$343

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Tue 6/16

1:25 pm-1:00 pm

1 stop22h 35m

Kansas City

Sat 6/20

1:45 pm-12:30 pm

1 stop23h 45m

$242

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 9/1

1:04 pm-7:23 pm

1 stop5h 19m

Lambert-St Louis

Sat 9/5

8:08 pm-12:09 pm

1 stop17h 01m

$262

SpokaneSpringfield

GEG - SGF

GEGSGF

Spokane

Wed 8/26

12:40 pm-10:21 pm

1 stop7h 41m

Springfield-Branson

Tue 9/1

6:00 am-11:24 am

1 stop7h 24m

$311

Idaho FallsKansas City

IDA - MCI

IDAMCI

Idaho Falls Fanning Field

Thu 8/27

4:14 pm-12:38 pm

1 stop19h 24m

Kansas City

Sun 8/30

2:46 pm-1:06 pm

1 stop23h 20m

$319

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Tue 6/23

3:00 pm-10:25 pm

1 stop6h 25m

Kansas City

Tue 6/30

5:05 pm-12:25 am

1 stop8h 20m

$327

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Mon 10/5

1:43 pm-10:29 pm

1 stop7h 46m

Springfield-Branson

Sun 10/11

3:30 pm-10:41 pm

1 stop8h 11m

$329

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Mon 10/12

8:00 pm-2:17 pm

1 stop17h 17m

Kansas City

Tue 10/13

6:12 pm-11:54 pm

1 stop6h 42m

$347

Quickest round-trip

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Sat 6/6

5:46 pm-11:42 pm

1 stop4h 56m

Springfield-Branson

Sun 6/14

5:50 am-9:45 am

1 stop4h 55m

$355

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 6/2

2:25 pm-11:15 pm

1 stop6h 50m

Lambert-St Louis

Tue 6/9

5:35 am-11:45 am

1 stop8h 10m

$357

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 6/9

5:46 pm-11:57 pm

1 stop5h 11m

Lambert-St Louis

Tue 6/23

5:10 am-9:45 am

1 stop5h 35m

$380

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 Idaho to Missouri

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 Missouri?

In general, May is the cheapest month to fly from Idaho to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $84. If you aren’t able to travel to Missouri during the month of May, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $133.

Can stopping save me money on Idaho to Missouri flights?

You could potentially save up to 40% on your flight if you consider stops on a Idaho to Missouri flight.

Cheap Idaho to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to Missouri

Fastest flight time	4h 03m
Direct flights	None

The fastest flight from Idaho to Missouri takes 4h 03m

There are no direct flights from Idaho to Missouri. There are no popular flight routes from Idaho to Missouri.

Search flight deals

Frequently asked questions about flying from Idaho to Missouri

When did momondo last update prices for flights from Idaho to Missouri?
Prices for flights from Idaho to Missouri refresh daily.
How many operators does momondo search for flights from Idaho to Missouri?
The number of operators available for flights from Idaho to Missouri is 5 as of May 2026.
How old do you have to be to fly from Idaho to Missouri?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Missouri.
What documentation or ID do you need to fly to Missouri?
The required travel and health documents for your Missouri 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 Missouri. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to Missouri

Compare and see reviews for airlines that fly from Idaho to Missouri with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $143	Free Cancellation	Rating 7.9 8,453 reviews	Search Delta flights
Southwest	PriceFrom $196	Free Cancellation	Rating 8.0 4,299 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $262	Free Cancellation	Rating 7.9 12,367 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
United Airlines	PriceFrom $283	Free Cancellation	Rating 7.4 9,717 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to Missouri?

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

Can I find flights from Idaho to Missouri with flexible booking policies on momondo?

Flights from Idaho to Missouri 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 Idaho to Missouri?

momondo provides multiple filters to help you find the best flight to Missouri from Idaho. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Missouri from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.