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 48% 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 Alaska 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 St. Louis (the most popular airport in Missouri), then the flight time is 4h 26m on average. If you fly from Hailey (another popular airport in Idaho) to St. Louis, then the average flight time is 5h 05m.

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

1 flights are operational weekly from Idaho to Missouri as of March 2026. The most popular departure day for this route is Sat, with 100% 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 March 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.

$80 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.

12:03 pm - 8:01 pm

BOI

MCI

6h 58m

1 stop

2:51 pm - 11:08 am

MCI

BOI

21h 17m

1 stop

$182Frontier

Thu, Apr 9 - Sat, Apr 18

1:22 pm - 1:49 pm

BOI

MCI

23h 27m

1 stop

2:34 pm - 12:27 pm

MCI

BOI

22h 53m

1 stop

$212Frontier

Thu, May 7 - Mon, May 11

10:45 am - 7:06 pm

BOI

MCI

7h 21m

1 stop

6:40 am - 12:02 pm

MCI

BOI

6h 22m

1 stop

$251Delta

Wed, Apr 22 - Wed, Apr 29

4:05 pm - 11:15 pm

BOI

STL

6h 10m

1 stop

6:30 pm - 12:25 am

STL

BOI

6h 55m

1 stop

$263Southwest

Tue, May 5 - Wed, May 6

2:00 pm - 10:00 pm

BOI

STL

7h 00m

1 stop

5:40 pm - 12:25 am

STL

BOI

7h 45m

2 stops

$268Southwest

Tue, May 5 - Wed, May 6

2:57 pm - 11:59 pm

BOI

MCI

8h 02m

1 stop

7:00 am - 3:33 pm

MCI

BOI

9h 33m

1 stop

$277Alaska Airlines

Sat, May 2 - Tue, May 5

4:38 pm - 11:59 pm

BOI

STL

6h 21m

1 stop

4:46 pm - 11:02 pm

STL

BOI

7h 16m

1 stop

$290Alaska Airlines

Tue, May 5 - Wed, May 6

5:30 am - 1:23 pm

GEG

STL

5h 53m

1 stop

6:45 pm - 11:34 pm

STL

GEG

6h 49m

1 stop

$312Delta

Tue, Apr 21 - Thu, Apr 23

5:46 pm - 11:42 pm

BOI

SGF

4h 56m

1 stop

5:50 am - 9:53 am

SGF

BOI

5h 03m

1 stop

$331United Airlines

Tue, Jul 14 - Tue, Jul 21

5:46 pm - 11:42 pm

BOI

SGF

4h 56m

1 stop

5:50 am - 9:53 am

SGF

BOI

5h 03m

1 stop

$332United Airlines

Tue, Jul 14 - Tue, Jul 21

Southwest flights from Idaho to Missouri

Our best Southwest deals on Idaho to Missouri flight tickets

Southwest

May 5

BOI4:05 pmBoise Air Term. Gowen Fld

6h 10m

1 stop

STL11:15 pmLambert-St Louis

May 6

STL6:30 pmLambert-St Louis

6h 55m

1 stop

BOI12:25 amBoise Air Term. Gowen Fld

$263

Southwest

May 5

BOI2:00 pmBoise Air Term. Gowen Fld

7h 00m

1 stop

STL10:00 pmLambert-St Louis

May 6

STL5:40 pmLambert-St Louis

7h 45m

2 stops

BOI12:25 amBoise Air Term. Gowen Fld

$268

Southwest

May 2

BOI11:00 amBoise Air Term. Gowen Fld

8h 35m

2 stops

MCI8:35 pmKansas City

May 6

MCI7:05 amKansas City

6h 25m

1 stop

BOI12:30 pmBoise Air Term. Gowen Fld

$312

Alaska Airlines flights from Idaho to Missouri

Our best Alaska Airlines deals on Idaho to Missouri flight tickets

Alaska Airlines

May 2

BOI2:57 pmBoise Air Term. Gowen Fld

8h 02m

1 stop

MCI11:59 pmKansas City

May 5

MCI7:00 amKansas City

9h 33m

1 stop

BOI3:33 pmBoise Air Term. Gowen Fld

$277

Alaska Airlines

May 5

BOI4:38 pmBoise Air Term. Gowen Fld

6h 21m

1 stop

STL11:59 pmLambert-St Louis

May 6

STL4:46 pmLambert-St Louis

7h 16m

1 stop

BOI11:02 pmBoise Air Term. Gowen Fld

$290

Alaska Airlines

May 2

GEG5:00 amSpokane

7h 04m

1 stop

MCI2:04 pmKansas City

May 5

MCI2:58 pmKansas City

8h 33m

1 stop

GEG9:31 pmSpokane

$300

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 4/9

12:03 pm-8:01 pm

1 stop6h 58m

Kansas City

Sat 4/18

2:51 pm-11:08 am

1 stop21h 17m

$182

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 5/7

1:22 pm-1:49 pm

1 stop23h 27m

Kansas City

Mon 5/11

2:34 pm-12:27 pm

1 stop22h 53m

$212

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Wed 4/22

10:45 am-7:06 pm

1 stop7h 21m

Kansas City

Wed 4/29

6:40 am-12:02 pm

1 stop6h 22m

$251

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/5

4:05 pm-11:15 pm

1 stop6h 10m

Lambert-St Louis

Wed 5/6

6:30 pm-12:25 am

1 stop6h 55m

$263

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/5

2:00 pm-10:00 pm

1 stop7h 00m

Lambert-St Louis

Wed 5/6

5:40 pm-12:25 am

2 stops7h 45m

$268

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Sat 5/2

2:57 pm-11:59 pm

1 stop8h 02m

Kansas City

Tue 5/5

7:00 am-3:33 pm

1 stop9h 33m

$277

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/5

4:38 pm-11:59 pm

1 stop6h 21m

Lambert-St Louis

Wed 5/6

4:46 pm-11:02 pm

1 stop7h 16m

$290

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 4/21

5:30 am-1:23 pm

1 stop5h 53m

Lambert-St Louis

Thu 4/23

6:45 pm-11:34 pm

1 stop6h 49m

$312

Quickest round-trip

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Tue 7/14

5:46 pm-11:42 pm

1 stop4h 56m

Springfield-Branson

Tue 7/21

5:50 am-9:53 am

1 stop5h 03m

$331

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Tue 7/14

5:46 pm-11:42 pm

1 stop4h 56m

Springfield-Branson

Tue 7/21

5:50 am-9:53 am

1 stop5h 03m

$332

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, September 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 $294. If you aren’t able to travel to Missouri during the month of September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $336.

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 $408 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 $304 on momondo.

Can stopping save me money on Idaho to Missouri flights?

You could potentially save up to 49% 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 26m
Direct flights	None

The fastest flight from Idaho to Missouri takes 4h 26m

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 March 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 $163	Free Cancellation	Rating 7.9 8,359 reviews	Search Delta flights
Southwest	PriceFrom $237	Free Cancellation	Rating 8.0 4,331 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $262	Free Cancellation	Rating 7.9 12,134 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.1 11,521 reviews	Search American Airlines flights
United Airlines	PriceFrom $283	Free Cancellation	Rating 7.4 9,509 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.