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 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 Hailey (a popular airport in Idaho) to St. Louis (the most popular airport in Missouri), then the flight time is 4h 24m on average. If you fly from Idaho Falls (another popular airport in Idaho) to St. Louis, then the average flight time is 4h 47m.

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

Spirit Airlines, Frontier, and Delta 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 August 2025.

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.

$117 Cheap Flights from Idaho to Missouri in 2025

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Find the cheapest flights from Idaho to Missouri

Round-trip

One-way

Last minute

Cheap round-trip flights

2:16 pm - 2:00 pmBOI-MCI

22h 44m1 stop

2:55 pm - 8:31 pmMCI-BOI

6h 36m1 stop

$221Spirit Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

2:16 pm - 2:00 pmBOI-MCI

22h 44m1 stop

2:55 pm - 8:31 pmMCI-BOI

6h 36m1 stop

$229Spirit Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

1:00 pm - 9:21 pmGEG-STL

6h 21m1 stop

6:01 am - 11:22 amSTL-GEG

7h 21m1 stop

$245Delta

Find Deal

Sat, Sep 27 - Tue, Sep 30

3:06 pm - 11:05 pmBOI-MCI

6h 59m1 stop

6:03 pm - 12:15 amMCI-BOI

7h 12m1 stop

$262Delta

Find Deal

Fri, Sep 5 - Wed, Sep 17

1:38 pm - 10:50 pmBOI-STL

8h 12m1 stop

5:18 am - 12:48 pmSTL-BOI

8h 30m1 stop

$278American Airlines

Find Deal

Wed, Sep 17 - Sat, Sep 20

2:12 pm - 11:58 pmBOI-STL

8h 46m2 stops

5:15 am - 9:42 amSTL-BOI

5h 27m1 stop

$284United Airlines

Find Deal

Thu, Sep 25 - Sun, Sep 28

2:13 pm - 11:27 pmBOI-MCI

8h 14m2 stops

5:15 pm - 9:14 pmMCI-BOI

4h 59m1 stop

$292United Airlines

Find Deal

Thu, Sep 18 - Tue, Sep 23

3:15 pm - 11:55 pmGEG-STL

6h 40m1 stop

5:45 am - 12:35 pmSTL-GEG

8h 50m2 stops

$296Southwest

Find Deal

Thu, Sep 18 - Mon, Sep 22

7:45 am - 8:25 pmBOI-STL

11h 40m1 stop

6:00 am - 10:10 amSTL-BOI

5h 10m1 stop

$304Southwest

Find Deal

Fri, Sep 26 - Sun, Sep 28

11:59 pm - 8:47 amGEG-STL

6h 48m1 stop

5:56 am - 12:59 pmSTL-GEG

9h 03m1 stop

$327American Airlines

Find Deal

Tue, Dec 23 - Tue, Dec 30

Delta flights from Idaho to Missouri

Our best Delta deals on Idaho to Missouri flight tickets

Delta

Sep 27

GEG1:00 pmSpokane

6h 21m

1 stop

STL9:21 pmLambert-St Louis

Sep 30

STL6:01 amLambert-St Louis

7h 21m

1 stop

GEG11:22 amSpokane

$245

Find similar

Delta

Sep 5

BOI3:06 pmBoise Air Term. Gowen Fld

6h 59m

1 stop

MCI11:05 pmKansas City

Sep 17

MCI6:03 pmKansas City

7h 12m

1 stop

BOI12:15 amBoise Air Term. Gowen Fld

$262

Find similar

Delta

Sep 5

BOI3:06 pmBoise Air Term. Gowen Fld

6h 59m

1 stop

MCI11:05 pmKansas City

Sep 13

MCI2:30 pmKansas City

5h 34m

1 stop

BOI7:04 pmBoise Air Term. Gowen Fld

$267

Find similar

Hawaiian Airlines flights from Idaho to Missouri

Our best Hawaiian Airlines deals on Idaho to Missouri flight tickets

Hawaiian Airlines

Jan 6

GEG2:53 pmSpokane

7h 06m

1 stop

STL11:59 pmLambert-St Louis

Jan 11

STL2:55 pmLambert-St Louis

8h 04m

1 stop

GEG8:59 pmSpokane

$306

Find similar

Hawaiian Airlines

Sep 30

IDA6:13 amIdaho Falls Fanning Field

7h 26m

1 stop

STL2:39 pmLambert-St Louis

Oct 4

STL3:57 pmLambert-St Louis

7h 41m

1 stop

IDA10:38 pmIdaho Falls Fanning Field

$367

Find similar

Hawaiian Airlines

Sep 9

BOI8:00 amBoise Air Term. Gowen Fld

8h 34m

1 stop

STL5:34 pmLambert-St Louis

Sep 16

STL3:35 pmLambert-St Louis

8h 15m

1 stop

BOI10:50 pmBoise Air Term. Gowen Fld

$392

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 9/18

2:16 pm-2:00 pm

1 stop22h 44m

Kansas City

Mon 9/22

2:55 pm-8:31 pm

1 stop6h 36m

$221

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 9/18

2:16 pm-2:00 pm

1 stop22h 44m

Kansas City

Mon 9/22

2:55 pm-8:31 pm

1 stop6h 36m

$229

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Sat 9/27

1:00 pm-9:21 pm

1 stop6h 21m

Lambert-St Louis

Tue 9/30

6:01 am-11:22 am

1 stop7h 21m

$245

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Fri 9/5

3:06 pm-11:05 pm

1 stop6h 59m

Kansas City

Wed 9/17

6:03 pm-12:15 am

1 stop7h 12m

$262

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 9/17

1:38 pm-10:50 pm

1 stop8h 12m

Lambert-St Louis

Sat 9/20

5:18 am-12:48 pm

1 stop8h 30m

$278

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 9/25

2:12 pm-11:58 pm

2 stops8h 46m

Lambert-St Louis

Sun 9/28

5:15 am-9:42 am

1 stop5h 27m

$284

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 9/18

2:13 pm-11:27 pm

2 stops8h 14m

Kansas City

Tue 9/23

5:15 pm-9:14 pm

1 stop4h 59m

$292

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 9/18

3:15 pm-11:55 pm

1 stop6h 40m

Lambert-St Louis

Mon 9/22

5:45 am-12:35 pm

2 stops8h 50m

$296

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Fri 9/26

7:45 am-8:25 pm

1 stop11h 40m

Lambert-St Louis

Sun 9/28

6:00 am-10:10 am

1 stop5h 10m

$304

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 12/23

11:59 pm-8:47 am

1 stop6h 48m

Lambert-St Louis

Tue 12/30

5:56 am-12:59 pm

1 stop9h 03m

$327

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, April 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 $334. If you aren’t able to travel to Missouri during the month of April, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $345.

What is the cheapest day to depart on your flight to Missouri?

The cheapest day to depart from Idaho to Missouri is on a Tuesday when prices can be found for as low as $391. Flights from Idaho to Missouri on a Monday will generally be more expensive and average around $561. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Missouri?

According to our data, the cheapest time of day to fly to Missouri is in the afternoon. momondo users have found flights departing from Idaho to Missouri in the afternoon for as low as $410. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the morning, with an average ticket price of $496. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Missouri from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $439 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Idaho for as low as $286 on momondo.

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

Direct flights	None

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

Search flight deals

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 August 2025.
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
Alaska Airlines	PriceFrom $156	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Delta	PriceFrom $159	Free Cancellation	Rating 7.9 7,980 reviews	Search Delta flights
American Airlines	PriceFrom $226	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $281	Free Cancellation	Rating 8.0 4,247 reviews	Search Southwest flights
United Airlines	PriceFrom $292	Free Cancellation	Rating 7.4 8,937 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.