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

United Airlines, Southwest, and American Airlines 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 35m on average. Another popular route from Missouri to Idaho is flying from Springfield to Boise, which will take roughly 4h 55m. 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 44% 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 April 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.

$117 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.

2:34 pm - 12:30 pm

MCI

BOI

22h 56m

1 stop

1:25 pm - 1:00 pm

BOI

MCI

22h 35m

1 stop

$242Frontier

Mon, Jun 1 - Tue, Jun 9

7:40 pm - 11:56 pm

MCI

BOI

5h 16m

1 stop

5:45 pm - 12:20 am

BOI

MCI

5h 35m

1 stop

$251Delta

Tue, Aug 25 - Tue, Sep 1

5:35 pm - 10:25 pm

MCI

BOI

5h 50m

1 stop

6:00 am - 2:45 pm

BOI

MCI

7h 45m

1 stop

$252Southwest

Tue, Aug 25 - Tue, Sep 1

4:45 pm - 11:10 pm

MCI

BOI

7h 25m

2 stops

7:05 am - 1:35 pm

BOI

MCI

5h 30m

1 stop

$258Southwest

Tue, Aug 25 - Tue, Sep 1

7:00 am - 2:20 pm

STL

BOI

8h 20m

1 stop

3:11 pm - 11:56 pm

BOI

STL

7h 45m

1 stop

$263American Airlines

Tue, Jun 2 - Tue, Jun 9

7:00 am - 3:33 pm

STL

BOI

9h 33m

1 stop

4:19 pm - 11:54 pm

BOI

STL

6h 35m

1 stop

$302Alaska Airlines

Sat, May 9 - Sat, May 16

5:30 am - 12:01 pm

MCI

GEG

8h 31m

1 stop

3:00 pm - 11:59 pm

GEG

MCI

6h 59m

1 stop

$312American Airlines

Tue, Jun 2 - Thu, Jun 4

5:33 pm - 11:06 pm

STL

GEG

7h 33m

1 stop

5:00 am - 3:16 pm

GEG

STL

8h 16m

1 stop

$341Alaska Airlines

Tue, May 26 - Wed, May 27

11:29 am - 3:43 pm

MCI

IDA

5h 14m

1 stop

5:26 pm - 11:59 pm

IDA

MCI

5h 33m

1 stop

$354United Airlines

Tue, May 5 - Tue, May 12

9:06 am - 3:12 pm

STL

GEG

8h 06m

1 stop

1:41 pm - 8:57 pm

GEG

STL

5h 16m

1 stop

$357United Airlines

Sat, May 23 - Sat, May 30

Delta flights from Missouri to Idaho

Our best Delta deals on Missouri to Idaho flight tickets

Delta

Aug 25

MCI7:40 pmKansas City

5h 16m

1 stop

BOI11:56 pmBoise Air Term. Gowen Fld

Sep 1

BOI5:45 pmBoise Air Term. Gowen Fld

5h 35m

1 stop

MCI12:20 amKansas City

$251

Delta

May 13

MCI6:40 amKansas City

7h 21m

1 stop

GEG12:01 pmSpokane

May 27

GEG2:16 pmSpokane

7h 00m

1 stop

MCI11:16 pmKansas City

$283

Delta

May 12

MCI7:40 pmKansas City

5h 24m

1 stop

BOI12:04 amBoise Air Term. Gowen Fld

May 19

BOI10:50 amBoise Air Term. Gowen Fld

5h 43m

1 stop

MCI5:33 pmKansas City

$307

Southwest flights from Missouri to Idaho

Our best Southwest deals on Missouri to Idaho flight tickets

Southwest

Aug 25

MCI5:35 pmKansas City

5h 50m

1 stop

BOI10:25 pmBoise Air Term. Gowen Fld

Sep 1

BOI6:00 amBoise Air Term. Gowen Fld

7h 45m

1 stop

MCI2:45 pmKansas City

$252

Southwest

Aug 25

MCI4:45 pmKansas City

7h 25m

2 stops

BOI11:10 pmBoise Air Term. Gowen Fld

Sep 1

BOI7:05 amBoise Air Term. Gowen Fld

5h 30m

1 stop

MCI1:35 pmKansas City

$258

Southwest

Aug 25

MCI7:35 amKansas City

7h 25m

2 stops

BOI2:00 pmBoise Air Term. Gowen Fld

Sep 1

BOI7:40 amBoise Air Term. Gowen Fld

8h 20m

2 stops

MCI5:00 pmKansas City

$263

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Mon 6/1

2:34 pm-12:30 pm

1 stop22h 56m

Boise Air Term. Gowen Fld

Tue 6/9

1:25 pm-1:00 pm

1 stop22h 35m

$242

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Tue 8/25

7:40 pm-11:56 pm

1 stop5h 16m

Boise Air Term. Gowen Fld

Tue 9/1

5:45 pm-12:20 am

1 stop5h 35m

$251

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Tue 8/25

5:35 pm-10:25 pm

1 stop5h 50m

Boise Air Term. Gowen Fld

Tue 9/1

6:00 am-2:45 pm

1 stop7h 45m

$252

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Tue 8/25

4:45 pm-11:10 pm

2 stops7h 25m

Boise Air Term. Gowen Fld

Tue 9/1

7:05 am-1:35 pm

1 stop5h 30m

$258

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 6/2

7:00 am-2:20 pm

1 stop8h 20m

Boise Air Term. Gowen Fld

Tue 6/9

3:11 pm-11:56 pm

1 stop7h 45m

$263

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 5/9

7:00 am-3:33 pm

1 stop9h 33m

Boise Air Term. Gowen Fld

Sat 5/16

4:19 pm-11:54 pm

1 stop6h 35m

$302

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Tue 6/2

5:30 am-12:01 pm

1 stop8h 31m

Spokane

Thu 6/4

3:00 pm-11:59 pm

1 stop6h 59m

$312

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Tue 5/26

5:33 pm-11:06 pm

1 stop7h 33m

Spokane

Wed 5/27

5:00 am-3:16 pm

1 stop8h 16m

$341

Quickest round-trip

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 5/5

11:29 am-3:43 pm

1 stop5h 14m

Idaho Falls Fanning Field

Tue 5/12

5:26 pm-11:59 pm

1 stop5h 33m

$354

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Sat 5/23

9:06 am-3:12 pm

1 stop8h 06m

Spokane

Sat 5/30

1:41 pm-8:57 pm

1 stop5h 16m

$357

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 $435 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 $284 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 29m
Direct flights	None

The fastest flight from Missouri to Idaho takes 4h 29m

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

Search flight deals

Frequently asked questions about flying from Missouri to Idaho

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 April 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 8,430 reviews	Search Delta flights
American Airlines	PriceFrom $186	Free Cancellation	Rating 7.1 11,647 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $232	Free Cancellation	Rating 7.9 12,273 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $252	Free Cancellation	Rating 7.4 9,625 reviews	Search United Airlines flights
Southwest	PriceFrom $266	Free Cancellation	Rating 8.0 4,330 reviews	Search Southwest 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.