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 Frontier ($97), Delta ($134), and United Airlines ($149).

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 44 days in advance, which can save you up to 159% on flights from Idaho to Missouri compared to booking the week you need them. Waiting 44 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?

November can be a great time to fly to Missouri from Idaho with a flight ticket averaging about $393. Cheapflights users have found deals in the month of November for as cheap as $184. 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.

$97+ Flights from Idaho to Missouri - Compare & Save Big

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Cheap flight deals from Idaho to Missouri

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$227 (CheapOair)
One-way from	$97 (Mytrip)
Popular in	February
Cheapest in	November
Average price	$387

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 ($23 potential increase over avg. RT price).

Search Deals

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

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Average for round-trip flights in May 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 May 1, 2025.

Sun 6/112:36 pmBOI - STL

1 stop19h 36mFrontier

Wed 6/48:11 pmSTL - BOI

1 stop16h 36mFrontier

Deal found 4/28

$227

Wed 6/45:43 pmBOI - SGF

1 stop5h 00mUnited Airlines

Sun 6/85:45 amSGF - BOI

1 stop5h 01mUnited Airlines

Deal found 4/28

$269

Fri 5/301:22 pmGEG - SGF

1 stop8h 32mAmerican Airlines

Sun 6/87:27 pmSGF - GEG

1 stop5h 53mAmerican Airlines

Deal found 4/29

$269

Wed 9/35:45 pmBOI - MCI

1 stop5h 35mDelta

Sun 9/76:20 pmMCI - BOI

1 stop6h 52mDelta

Deal found 4/30

$276

Tue 9/2311:45 amBOI - STL

1 stop5h 12mDelta

Fri 9/266:59 pmSTL - BOI

1 stop6h 18mDelta

Deal found 4/30

$287

Tue 5/135:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Tue 8/510:00 amSTL - BOI

2 stops9h 07mUnited Airlines

Deal found 4/29

$292

Sat 8/301:43 pmBOI - SGF

1 stop7h 47mDelta

Sat 9/66:00 amSGF - BOI

1 stop7h 31mDelta

Deal found 4/29

$294

Wed 7/165:42 pmBOI - MCI

1 stop4h 49mUnited Airlines

Sun 7/206:00 amMCI - BOI

1 stop4h 46mUnited Airlines

Deal found 4/30

$297

Tue 7/12:22 pmGEG - STL

1 stop7h 05mDelta

Tue 7/298:50 amSTL - GEG

1 stop6h 27mDelta

Deal found 4/30

$299

Tue 5/275:35 amGEG - MCI

1 stop4h 58mUnited Airlines

Tue 6/35:20 pmMCI - GEG

1 stop5h 28mUnited Airlines

Deal found 4/29

$299

Thu 8/76:00 amGEG - STL

1 stop8h 51mAmerican Airlines

Tue 8/126:06 amSTL - GEG

1 stop8h 16mAmerican Airlines

Deal found 4/30

$303

Fri 7/115:10 pmGEG - MCI

1 stop5h 11mDelta

Tue 7/159:17 amMCI - GEG

1 stop6h 00mDelta

Deal found 4/29

$303

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 May 1, 2025.

Sun 6/112:36 pmBOI - STL

1 stop19h 36mFrontier

Wed 6/48:11 pmSTL - BOI

1 stop16h 36mFrontier

Deal found 4/28

$227

Wed 6/45:43 pmBOI - SGF

1 stop5h 00mUnited Airlines

Sun 6/85:45 amSGF - BOI

1 stop5h 01mUnited Airlines

Deal found 4/28

$269

Fri 5/301:22 pmGEG - SGF

1 stop8h 32mAmerican Airlines

Sun 6/87:27 pmSGF - GEG

1 stop5h 53mAmerican Airlines

Deal found 4/29

$269

Tue 9/233:00 pmBOI - STL

1 stop7h 02mDelta

Thu 9/256:59 pmSTL - BOI

1 stop6h 18mDelta

Deal found 4/30

$287

Wed 5/142:41 pmBOI - STL

1 stop8h 18mAlaska Airlines

Tue 8/53:24 pmSTL - BOI

1 stop8h 22mAlaska Airlines

Deal found 4/30

$306

Thu 6/55:05 pmBOI - MCI

1 stop6h 20mSouthwest

Mon 6/98:55 pmMCI - BOI

1 stop4h 35mSouthwest

Deal found 4/30

$319

Sat 5/312:40 pmBOI - MCI

3 stops17h 35mMultiple Airlines

Sun 6/87:58 pmMCI - BOI

1 stop16h 23mMultiple Airlines

Deal found 4/29

$326

Thu 5/221:40 pmGEG - MCI

1 stop7h 58mHawaiian Airlines

Tue 5/277:01 pmMCI - GEG

1 stop6h 53mHawaiian Airlines

Deal found 4/29

$442

Tue 5/135:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Tue 8/510:00 amSTL - BOI

2 stops9h 07mUnited Airlines

Deal found 4/29

$292

Sat 8/301:43 pmBOI - SGF

1 stop7h 47mDelta

Sat 9/66:00 amSGF - BOI

1 stop7h 31mDelta

Deal found 4/29

$294

Thu 8/76:00 amGEG - STL

1 stop8h 51mAmerican Airlines

Tue 8/126:06 amSTL - GEG

1 stop8h 16mAmerican Airlines

Deal found 4/30

$303

Wed 7/165:42 pmBOI - MCI

1 stop4h 49mUnited Airlines

Sun 7/206:00 amMCI - BOI

1 stop4h 46mUnited Airlines

Deal found 4/30

$297

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

Wed 5/75:25 pmBOI - SGF

1 stop5h 05mUnited Airlines

Wed 5/145:45 amSGF - BOI

1 stop5h 14mUnited Airlines

Deal found 4/30

$476

Wed 5/72:41 pmBOI - MCI

1 stop8h 18mAlaska Airlines

Mon 5/197:01 pmMCI - BOI

1 stop16h 45mAlaska Airlines

Deal found 4/30

$512

Wed 5/74:22 pmIDA - SGF

1 stop6h 08mUnited Airlines

Sat 5/105:45 amSGF - IDA

1 stop4h 47mUnited Airlines

Deal found 4/28

$620

Thu 5/85:00 amBOI - MCI

1 stop4h 48mUnited Airlines

Mon 5/125:20 pmMCI - BOI

1 stop5h 22mUnited Airlines

Deal found 4/30

$359

Thu 5/85:10 pmBOI - MCI

1 stop5h 35mAmerican Airlines

Mon 5/128:30 amMCI - BOI

1 stop5h 50mAmerican Airlines

Deal found 4/30

$401

Thu 5/87:00 amGEG - SGF

2 stops11h 19mAlaska Airlines

Mon 5/1212:09 pmSGF - GEG

2 stops13h 10mAlaska Airlines

Deal found 4/30

$640

Fri 5/91:22 pmGEG - SGF

1 stop8h 32mAmerican Airlines

Tue 5/135:27 amSGF - GEG

1 stop8h 58mAmerican Airlines

Deal found 4/30

$361

Fri 5/95:10 pmBOI - STL

1 stop5h 48mAmerican Airlines

Mon 5/124:52 pmSTL - BOI

1 stop6h 08mAmerican Airlines

Deal found 4/30

$401

Fri 5/95:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Mon 5/121:10 pmSTL - BOI

2 stops9h 32mUnited Airlines

Deal found 4/29

$444

Fri 5/96:00 amGEG - SGF

2 stops12h 29mUnited Airlines

Tue 5/139:10 amSGF - GEG

1 stop5h 28mUnited Airlines

Deal found 4/30

$446

Tue 5/135:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Tue 8/51:42 pmSTL - BOI

1 stop5h 25mUnited Airlines

Deal found 4/29

$287

Tue 5/135:10 pmBOI - STL

1 stop5h 48mAmerican Airlines

Tue 5/205:19 amSTL - BOI

1 stop8h 26mAmerican Airlines

Deal found 4/29

$344

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 May 1, 2025.

Tue 5/202:27 pmBOI - STL

1 stop18h 32mFrontier

Deal found 4/30

$97

Tue 5/205:40 pmBOI - MCI

1 stop5h 40mDelta

Deal found 4/29

$134

Mon 6/27:18 pmBOI - STL

1 stop4h 41mDelta

Deal found 4/29

$144

Tue 5/206:30 amBOI - STL

2 stops8h 17mUnited Airlines

Deal found 4/30

$149

Sun 9/75:00 pmGEG - STL

1 stop5h 38mDelta

Deal found 4/30

$150

Mon 9/81:40 pmGEG - STL

1 stop8h 19mAlaska Airlines

Deal found 4/30

$153

Fri 7/185:10 pmGEG - MCI

1 stop5h 11mDelta

Deal found 4/29

$154

Sun 8/248:45 pmGEG - MCI

1 stop15h 57mAlaska Airlines

Deal found 4/29

$159

Mon 5/194:35 pmBOI - STL

1 stop6h 29mHawaiian Airlines

Deal found 4/30

$163

Sat 6/76:00 amIDA - STL

2 stops10h 09mDelta

Deal found 4/30

$169

Mon 5/194:35 pmBOI - MCI

1 stop6h 03mAlaska Airlines

Deal found 4/29

$173

Wed 5/284:20 pmIDA - MCI

1 stop6h 18mHawaiian Airlines

Deal found 4/30

$173

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

Sun 6/1

12:36 pm-9:12 am

1 stop19h 36m

Lambert-St Louis

Wed 6/4

8:11 pm-11:47 am

1 stop16h 36m

$227

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Wed 6/4

5:43 pm-11:43 pm

1 stop5h 00m

Springfield-Branson

Sun 6/8

5:45 am-9:46 am

1 stop5h 01m

$269

SpokaneSpringfield

GEG - SGF

GEGSGF

Spokane

Fri 5/30

1:22 pm-11:54 pm

1 stop8h 32m

Springfield-Branson

Sun 6/8

7:27 pm-11:20 pm

1 stop5h 53m

$269

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 9/23

3:00 pm-11:02 pm

1 stop7h 02m

Lambert-St Louis

Thu 9/25

6:59 pm-12:17 am

1 stop6h 18m

$287

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/13

5:25 pm-11:58 pm

1 stop5h 33m

Lambert-St Louis

Tue 8/5

10:00 am-6:07 pm

2 stops9h 07m

$292

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Sat 8/30

1:43 pm-10:30 pm

1 stop7h 47m

Springfield-Branson

Sat 9/6

6:00 am-12:31 pm

1 stop7h 31m

$294

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Wed 7/16

5:42 pm-11:31 pm

1 stop4h 49m

Kansas City

Sun 7/20

6:00 am-9:46 am

1 stop4h 46m

$297

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 7/1

2:22 pm-11:27 pm

1 stop7h 05m

Lambert-St Louis

Tue 7/29

8:50 am-1:17 pm

1 stop6h 27m

$299

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Tue 5/27

5:35 am-12:33 pm

1 stop4h 58m

Kansas City

Tue 6/3

5:20 pm-8:48 pm

1 stop5h 28m

$299

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 8/7

6:00 am-4:51 pm

1 stop8h 51m

Lambert-St Louis

Tue 8/12

6:06 am-12:22 pm

1 stop8h 16m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,972 reviews

Alaska Airlines

8.0

Very good

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,294 reviews

Alaska Airlines

8.0

Very good

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,934 reviews

Alaska Airlines

8.0

Very good

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.9

Good

2,409 reviews

Alaska Airlines

8.0

Very good

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,972 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Frontier ($97), Delta ($134), and United Airlines ($149).
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$219	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$156	Average$432	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$173	Average$466	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$226	Average$419	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$292	Average$566	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$315	Average$467	FlexibilityNo cancel fee	On-time63%

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$97+ 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 5/20. 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 May 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 May 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 May 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 May 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 May 1, 2025.