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

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

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 Idaho Falls (a popular airport in Idaho) to Kansas City (the most popular airport in Missouri), then the flight time is 4h 13m on average. If you fly from Boise (another popular airport in Idaho) to Kansas City, then the average flight time is 4h 31m.

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 43% 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.

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

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

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 June 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.

$122 Cheap Flights from Idaho to Missouri in 2026

Discover deals from 900+ travel sites with momondo.

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.

1:24 pm - 7:23 pm

BOI

STL

4h 59m

1 stop

12:46 pm - 2:57 pm

STL

BOI

27h 11m

1 stop

$254Frontier

Tue, Aug 11 - Wed, Sep 9

1:24 pm - 7:23 pm

BOI

STL

4h 59m

1 stop

8:08 pm - 12:29 pm

STL

BOI

17h 21m

1 stop

$284Frontier

Thu, Aug 13 - Mon, Aug 17

12:40 pm - 10:32 pm

GEG

SGF

7h 52m

1 stop

3:30 pm - 9:37 pm

SGF

GEG

8h 07m

1 stop

$311Delta

Wed, Oct 28 - Tue, Nov 3

7:00 am - 10:32 pm

GEG

SGF

13h 32m

2 stops

3:30 pm - 9:37 pm

SGF

GEG

8h 07m

1 stop

$316Delta

Wed, Oct 28 - Tue, Nov 3

4:05 pm - 11:44 pm

IDA

STL

6h 39m

1 stop

5:10 am - 9:53 am

STL

IDA

5h 43m

1 stop

$319United Airlines

Fri, Sep 25 - Sun, Sep 27

5:51 pm - 11:42 pm

IDA

SGF

4h 51m

1 stop

5:30 am - 9:53 am

SGF

IDA

5h 23m

1 stop

$319United Airlines

Sat, Oct 10 - Wed, Oct 14

4:20 pm - 11:59 pm

BOI

MCI

6h 39m

1 stop

7:00 am - 2:22 pm

MCI

BOI

8h 22m

1 stop

$341Alaska Airlines

Tue, Aug 25 - Wed, Aug 26

3:57 pm - 5:10 pm

IDA

STL

24h 13m

1 stop

6:08 pm - 1:24 pm

STL

IDA

20h 16m

1 stop

$344Alaska Airlines

Fri, Aug 28 - Sun, Aug 30

6:15 am - 5:00 pm

GEG

MCI

8h 45m

1 stop

3:35 pm - 10:25 pm

MCI

GEG

8h 50m

2 stops

$368Southwest

Wed, Sep 23 - Wed, Sep 30

2:55 pm - 11:45 pm

BOI

MCI

7h 50m

2 stops

7:15 pm - 11:55 pm

MCI

BOI

5h 40m

1 stop

$380Southwest

Mon, Aug 31 - Thu, Sep 3

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Delta flights from Idaho to Missouri

Our best Delta deals on Idaho to Missouri flight tickets

Delta

Oct 28

GEG12:40 pmSpokane

7h 52m

1 stop

SGF10:32 pmSpringfield-Branson

Nov 3

SGF3:30 pmSpringfield-Branson

8h 07m

1 stop

GEG9:37 pmSpokane

$311

Delta

Oct 28

GEG7:00 amSpokane

13h 32m

2 stops

SGF10:32 pmSpringfield-Branson

Nov 3

SGF3:30 pmSpringfield-Branson

8h 07m

1 stop

GEG9:37 pmSpokane

$316

Delta

Aug 27

IDA6:00 amIdaho Falls Fanning Field

7h 08m

1 stop

MCI2:08 pmKansas City

Aug 30

MCI6:19 pmKansas City

5h 13m

1 stop

IDA10:32 pmIdaho Falls Fanning Field

$319

Southwest flights from Idaho to Missouri

Our best Southwest deals on Idaho to Missouri flight tickets

Southwest

Sep 23

GEG6:15 amSpokane

8h 45m

1 stop

MCI5:00 pmKansas City

Sep 30

MCI3:35 pmKansas City

8h 50m

2 stops

GEG10:25 pmSpokane

$368

Southwest

Aug 19

BOI12:35 pmBoise Air Term. Gowen Fld

8h 35m

2 stops

STL10:10 pmLambert-St Louis

Aug 26

STL6:00 amLambert-St Louis

14h 45m

2 stops

BOI7:45 pmBoise Air Term. Gowen Fld

$379

Southwest

Aug 31

BOI2:55 pmBoise Air Term. Gowen Fld

7h 50m

2 stops

MCI11:45 pmKansas City

Sep 3

MCI7:15 pmKansas City

5h 40m

1 stop

BOI11:55 pmBoise Air Term. Gowen Fld

$380

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 8/11

1:24 pm-7:23 pm

1 stop4h 59m

Lambert-St Louis

Wed 9/9

12:46 pm-2:57 pm

1 stop27h 11m

$254

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 8/13

1:24 pm-7:23 pm

1 stop4h 59m

Lambert-St Louis

Mon 8/17

8:08 pm-12:29 pm

1 stop17h 21m

$284

SpokaneSpringfield

GEG - SGF

GEGSGF

Spokane

Wed 10/28

12:40 pm-10:32 pm

1 stop7h 52m

Springfield-Branson

Tue 11/3

3:30 pm-9:37 pm

1 stop8h 07m

$311

SpokaneSpringfield

GEG - SGF

GEGSGF

Spokane

Wed 10/28

7:00 am-10:32 pm

2 stops13h 32m

Springfield-Branson

Tue 11/3

3:30 pm-9:37 pm

1 stop8h 07m

$316

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Fri 9/25

4:05 pm-11:44 pm

1 stop6h 39m

Lambert-St Louis

Sun 9/27

5:10 am-9:53 am

1 stop5h 43m

$319

Quickest round-trip

Idaho FallsSpringfield

IDA - SGF

IDASGF

Idaho Falls Fanning Field

Sat 10/10

5:51 pm-11:42 pm

1 stop4h 51m

Springfield-Branson

Wed 10/14

5:30 am-9:53 am

1 stop5h 23m

$319

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Tue 8/25

4:20 pm-11:59 pm

1 stop6h 39m

Kansas City

Wed 8/26

7:00 am-2:22 pm

1 stop8h 22m

$341

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Fri 8/28

3:57 pm-5:10 pm

1 stop24h 13m

Lambert-St Louis

Sun 8/30

6:08 pm-1:24 pm

1 stop20h 16m

$344

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Wed 9/23

6:15 am-5:00 pm

1 stop8h 45m

Kansas City

Wed 9/30

3:35 pm-10:25 pm

2 stops8h 50m

$368

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Mon 8/31

2:55 pm-11:45 pm

2 stops7h 50m

Kansas City

Thu 9/3

7:15 pm-11:55 pm

1 stop5h 40m

$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, October 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 $133. If you aren’t able to travel to Missouri during the month of October, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $150.

Can stopping save me money on Idaho to Missouri flights?

You could potentially save up to 50% 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 13m
Direct flights	None

The fastest flight from Idaho to Missouri takes 4h 13m

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 June 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 $150	Free Cancellation	Rating 7.8 8,451 reviews	Search Delta flights
Southwest	PriceFrom $196	Free Cancellation	Rating 7.9 4,247 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $262	Free Cancellation	Rating 7.9 12,599 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.1 11,762 reviews	Search American Airlines flights
United Airlines	PriceFrom $283	Free Cancellation	Rating 7.4 9,901 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.