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

United Airlines, Alaska Airlines, and Frontier are the most popular carriers operating from Missouri to Idaho

How long is the flight from Missouri to Idaho?

Flight times from Missouri to Idaho vary, but if you’re flying out of Kansas City and flying into Boise (one of the most popular routes), then the duration is 4h 33m on average. Another popular route from Missouri to Idaho is flying from St. Louis to Boise, which will take roughly 4h 59m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Idaho?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to Idaho from Missouri according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 5 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Missouri to Idaho refresh daily.

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

As of February 2026, there are 5 operators available to choose from for flights from Missouri to Idaho.

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

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 Missouri to Idaho.

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

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

$101 Cheap Flights from Missouri to Idaho in 2026

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Find the cheapest flights from Missouri to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:32 am - 1:04 pm

MCI

GEG

5h 32m

1 stop

2:10 pm - 11:01 pm

GEG

MCI

6h 51m

1 stop

$220Delta

Tue, Apr 28 - Sat, May 2

7:55 am - 1:00 pm

MCI

GEG

7h 05m

1 stop

1:40 pm - 11:16 pm

GEG

MCI

7h 36m

1 stop

$227Delta

Tue, Mar 31 - Tue, Apr 7

5:00 am - 1:03 pm

MCI

BOI

9h 03m

1 stop

1:29 pm - 10:57 pm

BOI

MCI

8h 28m

1 stop

$229American Airlines

Sat, Apr 11 - Sat, Apr 18

11:30 am - 9:11 pm

MCI

GEG

11h 41m

2 stops

1:46 pm - 8:34 pm

GEG

MCI

4h 48m

1 stop

$236United Airlines

Sat, Apr 18 - Tue, Apr 21

2:23 pm - 11:56 pm

MCI

BOI

10h 33m

1 stop

6:00 am - 11:59 pm

BOI

MCI

16h 59m

1 stop

$247Alaska Airlines

Tue, Apr 21 - Sun, Apr 26

9:00 am - 1:21 pm

STL

JAC

5h 21m

1 stop

2:35 pm - 8:54 pm

JAC

STL

5h 19m

1 stop

$249United Airlines

Wed, Mar 25 - Wed, Apr 1

2:58 pm - 9:31 pm

MCI

GEG

8h 33m

1 stop

6:00 am - 4:17 pm

GEG

MCI

8h 17m

2 stops

$251Alaska Airlines

Tue, Apr 28 - Sat, May 2

6:00 am - 11:44 am

STL

GEG

7h 44m

1 stop

3:10 pm - 11:59 pm

GEG

STL

6h 49m

1 stop

$277American Airlines

Wed, Mar 25 - Wed, Apr 1

5:35 am - 10:35 am

STL

GEG

7h 00m

1 stop

6:30 am - 1:50 pm

GEG

STL

5h 20m

1 stop

$311Southwest

Sun, Apr 19 - Tue, Apr 21

6:15 am - 9:55 am

STL

GEG

5h 40m

1 stop

6:30 am - 5:55 pm

GEG

STL

9h 25m

2 stops

$359Southwest

Sun, Apr 19 - Tue, Apr 21

Frontier flights from Missouri to Idaho

Our best Frontier deals on Missouri to Idaho flight tickets

Frontier

Mar 11

MCI11:45 amKansas City

24h 35m

2 stops

BOI11:20 amBoise Air Term. Gowen Fld

Mar 15

BOI12:15 pmBoise Air Term. Gowen Fld

6h 40m

1 stop

MCI7:55 pmKansas City

$388

Frontier

Mar 18

STL8:12 pmLambert-St Louis

16h 35m

1 stop

GEG10:47 amSpokane

Mar 19

GEG2:00 pmSpokane

17h 49m

2 stops

STL9:49 amLambert-St Louis

$486

Southwest flights from Missouri to Idaho

Our best Southwest deals on Missouri to Idaho flight tickets

Southwest

Apr 14

MCI3:40 pmKansas City

9h 15m

2 stops

GEG10:55 pmSpokane

May 12

GEG10:55 amSpokane

8h 35m

2 stops

MCI9:30 pmKansas City

$304

Southwest

Apr 19

STL5:35 amLambert-St Louis

7h 00m

1 stop

GEG10:35 amSpokane

Apr 21

GEG6:30 amSpokane

5h 20m

1 stop

STL1:50 pmLambert-St Louis

$311

Southwest

Apr 18

MCI5:35 amKansas City

10h 10m

2 stops

GEG1:45 pmSpokane

Apr 21

GEG6:30 amSpokane

9h 00m

2 stops

MCI5:30 pmKansas City

$321

Fly from

Fly to

Route

Depart

Return

Price

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Tue 4/28

9:32 am-1:04 pm

1 stop5h 32m

Spokane

Sat 5/2

2:10 pm-11:01 pm

1 stop6h 51m

$220

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Tue 3/31

7:55 am-1:00 pm

1 stop7h 05m

Spokane

Tue 4/7

1:40 pm-11:16 pm

1 stop7h 36m

$227

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Sat 4/11

5:00 am-1:03 pm

1 stop9h 03m

Boise Air Term. Gowen Fld

Sat 4/18

1:29 pm-10:57 pm

1 stop8h 28m

$229

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Sat 4/18

11:30 am-9:11 pm

2 stops11h 41m

Spokane

Tue 4/21

1:46 pm-8:34 pm

1 stop4h 48m

$236

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Tue 4/21

2:23 pm-11:56 pm

1 stop10h 33m

Boise Air Term. Gowen Fld

Sun 4/26

6:00 am-11:59 pm

1 stop16h 59m

$247

St. LouisJackson

STL - JAC

STLJAC

Lambert-St Louis

Wed 3/25

9:00 am-1:21 pm

1 stop5h 21m

Jackson Hole

Wed 4/1

2:35 pm-8:54 pm

1 stop5h 19m

$249

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Tue 4/28

2:58 pm-9:31 pm

1 stop8h 33m

Spokane

Sat 5/2

6:00 am-4:17 pm

2 stops8h 17m

$251

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 3/25

6:00 am-11:44 am

1 stop7h 44m

Spokane

Wed 4/1

3:10 pm-11:59 pm

1 stop6h 49m

$277

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Sun 4/19

5:35 am-10:35 am

1 stop7h 00m

Spokane

Tue 4/21

6:30 am-1:50 pm

1 stop5h 20m

$311

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Sun 4/19

6:15 am-9:55 am

1 stop5h 40m

Spokane

Tue 4/21

6:30 am-5:55 pm

2 stops9h 25m

$359

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 Missouri to Idaho

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 Idaho?

In general, January is the cheapest month to fly from Missouri to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $359. If you don’t want to visit Idaho in January, then you should wait until November to fly from Missouri, when ticket prices are also cheap, with an average price of $373.

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

You are more likely to see cheaper flights to Idaho from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $428 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Missouri for as low as $304 on momondo.

Can stopping save me money on Missouri to Idaho flights?

You could potentially save up to 64% on your flight if you consider stops on a Missouri to Idaho flight.

Cheap Missouri to Idaho flight deals and tips

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

Fastest flight time	4h 33m
Direct flights	None

The fastest flight from Missouri to Idaho takes 4h 33m

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

Search flight deals

When did momondo last update prices for flights from Missouri to Idaho?
Prices for flights from Missouri to Idaho refresh daily.
How many operators does momondo search for flights from Missouri to Idaho?
As of February 2026, there are 5 operators available to choose from for flights from Missouri to Idaho.
How old do you have to be to fly from Missouri to Idaho?
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 Missouri to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho 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 Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Missouri to Idaho

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $133	Free Cancellation	Rating 7.9 8,242 reviews	Search Delta flights
American Airlines	PriceFrom $171	Free Cancellation	Rating 7.2 11,357 reviews	Search American Airlines flights
United Airlines	PriceFrom $198	Free Cancellation	Rating 7.4 9,349 reviews	Search United Airlines flights
Southwest	PriceFrom $266	Free Cancellation	Rating 8.0 4,301 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $288	Free Cancellation	Rating 8.0 11,965 reviews	Search Alaska Airlines flights

Why use momondo?

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

It is quick and easy to find Missouri to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.

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

Yes. momondo allows you to filter the results for Missouri to Idaho flights to just show those with flexible booking policies.

How can momondo help me find flights from Missouri to Idaho?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Idaho from Missouri.

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

If you are simply researching potential flights to Idaho, momondo offers a useful price alert feature which will track prices for flights to Idaho from Missouri and alert you when they change.