What are the cheapest airlines to fly from Idaho to Missouri one-way?

The cheapest airlines for a one-way flight from Idaho to Missouri are Delta ($114), Spirit Airlines ($142), and Alaska Airlines ($153).

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 20 days in advance, which can save you up to 171% on flights from Idaho to Missouri compared to booking the week you need them. Waiting 20 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $314. For sooner than that we have options available in the next 3 days from $628.

What is the cheapest month to fly from Idaho to Missouri?

May can be a great time to fly to Missouri from Idaho with a flight ticket averaging about $399. Cheapflights users have found deals in the month of May for as cheap as $149. The most expensive prices can be found in the month of February.

Can I find deals for flights from Idaho to Missouri that include hotel bookings?

Yes. In addition to deals on Idaho to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Idaho to Missouri?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Missouri.

Can I find deals for business class flights from Idaho to Missouri?

Yes. Cheapflights offers flight deals from Idaho to Missouri by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$114+ Flights from Idaho to Missouri

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Cheap flight deals from Idaho to Missouri

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$266 (CheapOair)
One-way from	$114 (Delta)
Popular in	February
Cheapest in	May
Average price	$337

Provider with most accurate pricing for Boise Air Term. Gowen Fld-Kansas City flight deals.

Search Deals

Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Kansas City flights.

Search Deals

From Idaho to Missouri

Search Deals

One-way flight from Idaho to Missouri

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Find flight deals from Idaho to Missouri

Cheapest flights from Idaho to Missouri
Explore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Tue 5/202:27 pmBOI - STL

1 stop18h 32mFrontier

Wed 5/287:55 pmSTL - BOI

1 stop16h 56mFrontier

Deal found 3/30

$266

Tue 4/294:40 pmBOI - STL

1 stop5h 55mSouthwest

Tue 5/65:55 amSTL - BOI

1 stop5h 20mSouthwest

Deal found 3/30

$270

Tue 4/152:15 pmBOI - SGF

1 stop7h 01mDelta

Sat 4/196:00 amSGF - BOI

2 stops12h 00mDelta

Deal found 3/30

$279

Fri 5/305:10 pmBOI - MCI

1 stop5h 35mAmerican Airlines

Tue 6/105:25 amMCI - BOI

1 stop6h 31mAmerican Airlines

Deal found 3/31

$290

Sat 7/511:49 amBOI - MCI

1 stop4h 29mDelta

Tue 7/85:40 pmMCI - BOI

1 stop6h 49mDelta

Deal found 3/31

$292

Wed 10/291:20 pmBOI - SGF

1 stop6h 08mAmerican Airlines

Tue 11/42:19 pmSGF - BOI

1 stop7h 59mAmerican Airlines

Deal found 3/30

$294

Thu 9/46:00 amGEG - MCI

1 stop6h 42mAlaska Airlines

Thu 9/44:55 pmMCI - GEG

1 stop8h 16mAlaska Airlines

Deal found 3/29

$301

Fri 5/91:22 pmGEG - MCI

1 stop7h 29mAmerican Airlines

Tue 5/135:15 amMCI - GEG

1 stop9h 10mAmerican Airlines

Deal found 3/31

$303

Tue 6/106:00 amGEG - STL

1 stop8h 39mAmerican Airlines

Sat 6/216:00 amSTL - GEG

1 stop9h 11mAmerican Airlines

Deal found 3/30

$307

Tue 9/25:00 pmGEG - MCI

1 stop5h 20mDelta

Sun 9/77:55 amMCI - GEG

1 stop7h 42mDelta

Deal found 3/29

$307

Mon 4/284:08 pmGEG - MCI

1 stop5h 36mUnited Airlines

Mon 5/56:00 amMCI - GEG

2 stops10h 41mUnited Airlines

Deal found 3/31

$312

Tue 5/2011:02 amBOI - STL

2 stops8h 59mUnited Airlines

Wed 5/284:32 pmSTL - BOI

1 stop5h 54mUnited Airlines

Deal found 3/30

$318

Best flights from Idaho to Missouri
Discover carefully curated flight deals from Idaho to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2025.

Tue 5/202:27 pmBOI - STL

1 stop18h 32mFrontier

Wed 5/287:55 pmSTL - BOI

1 stop16h 56mFrontier

Deal found 3/30

$266

Tue 4/296:15 amBOI - STL

1 stop6h 13mDelta

Tue 5/65:00 pmSTL - BOI

1 stop8h 09mDelta

Deal found 3/30

$270

Fri 5/305:10 pmBOI - MCI

1 stop5h 35mAmerican Airlines

Tue 6/105:25 amMCI - BOI

1 stop6h 31mAmerican Airlines

Deal found 3/31

$290

Thu 9/46:00 amGEG - MCI

1 stop6h 42mAlaska Airlines

Thu 9/44:55 pmMCI - GEG

1 stop8h 16mAlaska Airlines

Deal found 3/29

$301

Mon 4/284:08 pmGEG - MCI

1 stop5h 36mUnited Airlines

Mon 5/56:00 amMCI - GEG

2 stops10h 41mUnited Airlines

Deal found 3/31

$312

Fri 4/251:52 pmBOI - STL

2 stops20h 30mMultiple Airlines

Sun 4/276:10 pmSTL - BOI

2 stops19h 47mMultiple Airlines

Deal found 3/30

$371

Tue 6/101:25 pmGEG - STL

1 stop8h 30mSouthwest

Sat 6/212:00 pmSTL - GEG

2 stops12h 30mSouthwest

Deal found 3/30

$378

Sat 4/126:00 amGEG - STL

1 stop6h 15mHawaiian Airlines

Sat 4/196:44 amSTL - GEG

1 stop7h 50mHawaiian Airlines

Deal found 3/30

$435

Tue 4/152:15 pmBOI - SGF

1 stop7h 01mDelta

Sat 4/196:00 amSGF - BOI

2 stops12h 00mDelta

Deal found 3/30

$279

Sat 8/161:41 pmBOI - SGF

1 stop5h 42mAmerican Airlines

Mon 8/184:22 pmSGF - BOI

1 stop5h 54mAmerican Airlines

Deal found 3/30

$294

Tue 5/2011:02 amBOI - STL

2 stops8h 59mUnited Airlines

Wed 5/284:32 pmSTL - BOI

1 stop5h 54mUnited Airlines

Deal found 3/30

$318

Sat 7/511:49 amBOI - MCI

1 stop4h 29mDelta

Tue 7/85:40 pmMCI - BOI

1 stop6h 49mDelta

Deal found 3/31

$292

Last-minute flights from Idaho to Missouri
Discover last-minute flight deals from Idaho to Missouri. Data last updated April 1, 2025 and is based on user searches.

Sat 4/56:00 amGEG - STL

1 stop6h 15mAlaska Airlines

Tue 4/83:11 pmSTL - GEG

1 stop7h 50mAlaska Airlines

Deal found 3/30

$811

Tue 4/85:00 amBOI - SGF

1 stop6h 47mUnited Airlines

Tue 4/151:30 pmSGF - BOI

1 stop5h 22mUnited Airlines

Deal found 3/30

$415

Thu 4/1012:50 pmGEG - SGF

1 stop7h 21mDelta

Wed 4/163:30 pmSGF - GEG

2 stops10h 14mDelta

Deal found 3/31

$434

Thu 4/101:40 pmGEG - SGF

1 stop6h 01mUnited Airlines

Tue 4/155:10 pmSGF - GEG

1 stop21h 28mUnited Airlines

Deal found 3/31

$583

Thu 4/105:34 amGEG - SGF

1 stop6h 13mAmerican Airlines

Mon 4/144:26 pmSGF - GEG

1 stop7h 12mAmerican Airlines

Deal found 3/31

$609

Thu 4/102:47 pmBOI - STL

1 stop8h 12mHawaiian Airlines

Sat 4/126:44 amSTL - BOI

1 stop8h 08mHawaiian Airlines

Deal found 3/30

$610

Thu 4/107:00 pmBOI - STL

2 stops15h 03mUnited Airlines

Sat 4/124:45 pmSTL - BOI

1 stop18h 02mUnited Airlines

Deal found 3/30

$652

Thu 4/109:36 amGEG - MCI

1 stop12h 23mAlaska Airlines

Mon 4/142:55 pmMCI - GEG

1 stop8h 06mAlaska Airlines

Deal found 3/30

$667

Thu 4/104:08 pmGEG - MCI

2 stops15h 03mUnited Airlines

Mon 4/143:29 pmMCI - GEG

2 stops25h 38mUnited Airlines

Deal found 3/30

$843

Tue 4/152:15 pmBOI - SGF

1 stop7h 01mDelta

Sat 4/196:00 amSGF - BOI

2 stops12h 00mDelta

Deal found 3/30

$279

Tue 4/1512:06 pmBOI - SGF

1 stop8h 50mUnited Airlines

Sat 4/195:10 pmSGF - BOI

1 stop5h 12mUnited Airlines

Deal found 3/30

$319

Thu 4/245:55 pmJAC - STL

1 stop5h 47mDelta

Mon 4/282:23 pmSTL - JAC

1 stop5h 35mDelta

Deal found 3/31

$347

One-way flights from Idaho to Missouri
Search for one-way flight options from Idaho to Missouri. Find affordable one-way fares based on user searches. Data last updated April 1, 2025.

Tue 4/291:00 pmBOI - STL

1 stop7h 03mDelta

Deal found 3/30

$114

Fri 5/1612:16 pmBOI - MCI

1 stop5h 47mSpirit Airlines

Deal found 3/31

$142

Tue 5/611:25 amBOI - MCI

1 stop4h 40mDelta

Deal found 4/1

$143

Fri 5/161:40 pmGEG - MCI

1 stop7h 58mAlaska Airlines

Deal found 3/30

$153

Fri 6/135:00 pmGEG - STL

1 stop5h 36mDelta

Deal found 3/31

$154

Wed 6/111:51 pmGEG - MCI

1 stop8h 08mAmerican Airlines

Deal found 3/30

$154

Mon 4/288:36 pmGEG - SGF

1 stop19h 48mAllegiant Air

Deal found 3/31

$155

Tue 4/295:00 amBOI - STL

2 stops9h 47mUnited Airlines

Deal found 3/30

$159

Thu 5/82:41 pmBOI - MCI

1 stop8h 18mAlaska Airlines

Deal found 4/1

$159

Sat 5/105:35 amBOI - SGF

2 stops8h 30mDelta

Deal found 3/31

$165

Sat 7/57:00 amBOI - STL

1 stop6h 19mAmerican Airlines

Deal found 3/30

$184

Tue 5/611:02 amBOI - MCI

2 stops11h 42mUnited Airlines

Deal found 4/1

$188

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/20

2:27 pm-9:59 am

1 stop18h 32m

Lambert-St Louis

Wed 5/28

7:55 pm-11:51 am

1 stop16h 56m

$266

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 4/29

4:40 pm-11:35 pm

1 stop5h 55m

Lambert-St Louis

Tue 5/6

5:55 am-10:15 am

1 stop5h 20m

$270

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Tue 4/15

2:15 pm-10:16 pm

1 stop7h 01m

Springfield-Branson

Sat 4/19

6:00 am-5:00 pm

2 stops12h 00m

$279

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Fri 5/30

5:10 pm-11:45 pm

1 stop5h 35m

Kansas City

Tue 6/10

5:25 am-10:56 am

1 stop6h 31m

$290

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Sat 7/5

11:49 am-5:18 pm

1 stop4h 29m

Kansas City

Tue 7/8

5:40 pm-11:29 pm

1 stop6h 49m

$292

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Sat 8/16

1:41 pm-8:23 pm

1 stop5h 42m

Springfield-Branson

Mon 8/18

4:22 pm-9:16 pm

1 stop5h 54m

$294

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Thu 9/4

6:00 am-2:42 pm

1 stop6h 42m

Kansas City

Thu 9/4

4:55 pm-11:11 pm

1 stop8h 16m

$301

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Fri 5/9

1:22 pm-10:51 pm

1 stop7h 29m

Kansas City

Tue 5/13

5:15 am-12:25 pm

1 stop9h 10m

$303

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Tue 9/2

5:00 pm-12:20 am

1 stop5h 20m

Kansas City

Mon 9/8

6:40 am-1:33 pm

1 stop8h 53m

$307

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 6/10

6:00 am-4:39 pm

1 stop8h 39m

Lambert-St Louis

Sat 6/21

6:00 am-1:11 pm

1 stop9h 11m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 results

...

Best time to book a flight from Idaho to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Idaho with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Missouri

What is the cheapest month to book a flight from Idaho to Missouri?

Currently, August is the cheapest month in which you can book a flight from Idaho to Missouri (average of $311). Flying from Idaho to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to MO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Missouri as you normally would.

Rainfall in Missouri by month

In terms of precipitation, rainfall in Missouri ranges from 1.1 - 5.2 inches per month. May is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Missouri when rainfall is around 1.1 in.

Temperature in Missouri by month

If weather is an important factor for your trip to Missouri, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing Missouri

Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Idaho to Missouri by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,818 reviews

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,277 reviews

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,899 reviews

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.9

Good

2,344 reviews

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,614 reviews

Alaska Airlines

8.0

Very good

9,818 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What are the cheapest airlines to fly from Idaho to Missouri one-way?
The cheapest airlines for a one-way flight from Idaho to Missouri are Delta ($114), Spirit Airlines ($142), and Alaska Airlines ($153).
Can I find deals for flights from Idaho to Missouri that include hotel bookings?
Yes. In addition to deals on Idaho to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho to Missouri?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Missouri.
Can I find deals for business class flights from Idaho to Missouri?
Yes. Cheapflights offers flight deals from Idaho to Missouri by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Idaho to Missouri?
Currently, August is the cheapest month in which you can book a flight from Idaho to Missouri (average of $311). Flying from Idaho to Missouri in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Idaho to Missouri

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$116	Average$187	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$156	Average$431	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$180	Average$449	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$226	Average$425	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$292	Average$577	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$318	Average$466	FlexibilityNo cancel fee	On-time63%

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$114+ Cheap flights from Idaho to Missouri

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho to Missouri with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Idaho to Missouri

Keep the following information in mind while searching for Idaho to Missouri flight deals. Data was last updated April 1, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to Missouri

Cheapest flights from Idaho to MissouriExplore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Explore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to Missouri that are best for you.

Best time to book a flight from Idaho to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Idaho with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Missouri

What is the cheapest month to book a flight from Idaho to Missouri?

What is the cheapest time of day to fly from ID to MO?

Find hourly flight availability from Idaho to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2025.

Rainfall in Missouri by month

Plan your trip to Missouri by taking into account the average rainfall totals by month.

Temperature in Missouri by month

Plan your trip to Missouri by taking into account the average temperature totals by month.

Reviews of airlines servicing Missouri

Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Idaho to Missouri by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Idaho to Missouri one-way?

Can I find deals for flights from Idaho to Missouri that include hotel bookings?

How can I find direct flights from Idaho to Missouri?

Can I find deals for business class flights from Idaho to Missouri?

What is the cheapest month to book a flight from Idaho to Missouri?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Missouri

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Idaho to Missouri

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Travel Smart

Cheapest flights from Idaho to Missouri
Explore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.