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 ($134), Allegiant Air ($150), and American Airlines ($154).

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 $389. 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.

$134+ 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	eDreams 3 stars
Round-trip from	$286 (Hawaiian Airlines)
One-way from	$134 (Delta)
Popular in	February
Cheapest in	November
Average price	$339

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. 6% potential increase in price ($27 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

Search Deals

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 17, 2025.

Sat 10/42:45 pmBOI - STL

1 stop8h 11mHawaiian Airlines

Tue 10/77:00 amSTL - BOI

1 stop7h 45mHawaiian Airlines

Deal found 4/15

$286

Thu 7/36:10 pmBOI - STL

1 stop5h 33mDelta

Fri 7/116:30 amSTL - BOI

1 stop5h 27mDelta

Deal found 4/16

$287

Thu 6/55:43 pmBOI - MCI

1 stop4h 46mUnited Airlines

Sat 6/76:00 amMCI - BOI

1 stop4h 46mUnited Airlines

Deal found 4/17

$293

Tue 5/204:40 pmBOI - MCI

1 stop5h 20mSouthwest

Sun 5/256:55 amMCI - BOI

1 stop4h 40mSouthwest

Deal found 4/17

$299

Wed 6/43:18 pmGEG - STL

1 stop6h 30mAmerican Airlines

Sun 6/86:00 amSTL - GEG

1 stop9h 11mAmerican Airlines

Deal found 4/17

$303

Sat 5/2412:50 pmBOI - MCI

1 stop7h 02mDelta

Wed 5/285:35 pmMCI - BOI

1 stop7h 47mDelta

Deal found 4/17

$303

Wed 6/47:25 pmGEG - STL

2 stops13h 22mDelta

Sun 6/85:45 pmSTL - GEG

1 stop7h 26mDelta

Deal found 4/17

$306

Fri 5/162:15 pmGEG - MCI

1 stop6h 53mDelta

Thu 5/226:05 pmMCI - GEG

1 stop7h 33mDelta

Deal found 4/17

$307

Sat 10/45:50 amGEG - MCI

2 stops11h 15mSouthwest

Mon 10/66:00 amMCI - GEG

1 stop5h 15mSouthwest

Deal found 4/17

$312

Wed 10/297:30 amBOI - SGF

1 stop5h 16mAmerican Airlines

Tue 11/42:19 pmSGF - BOI

1 stop7h 59mAmerican Airlines

Deal found 4/17

$324

Tue 5/135:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Mon 5/265:20 amSTL - BOI

1 stop5h 26mUnited Airlines

Deal found 4/17

$327

Wed 6/45:10 pmBOI - MCI

1 stop5h 35mAmerican Airlines

Sat 6/77:49 pmMCI - BOI

1 stop16h 07mAmerican Airlines

Deal found 4/17

$332

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 17, 2025.

Sat 10/42:45 pmBOI - STL

1 stop8h 11mHawaiian Airlines

Tue 10/77:00 amSTL - BOI

1 stop7h 45mHawaiian Airlines

Deal found 4/15

$286

Thu 7/36:10 pmBOI - STL

1 stop5h 33mDelta

Sat 7/56:30 amSTL - BOI

1 stop8h 23mDelta

Deal found 4/16

$287

Thu 6/55:43 pmBOI - MCI

1 stop4h 46mUnited Airlines

Sat 6/76:00 amMCI - BOI

1 stop4h 46mUnited Airlines

Deal found 4/17

$293

Tue 5/204:40 pmBOI - MCI

1 stop5h 20mSouthwest

Sun 5/256:55 amMCI - BOI

1 stop4h 40mSouthwest

Deal found 4/17

$299

Wed 6/43:18 pmGEG - STL

1 stop6h 30mAmerican Airlines

Sun 6/86:00 amSTL - GEG

1 stop9h 11mAmerican Airlines

Deal found 4/17

$303

Tue 10/149:50 amBOI - STL

1 stop13h 06mAlaska Airlines

Wed 10/222:55 pmSTL - BOI

1 stop7h 15mAlaska Airlines

Deal found 4/16

$346

Mon 5/1212:16 pmBOI - SGF

1 stop7h 53mMultiple Airlines

Sun 5/188:27 amSGF - BOI

3 stops27h 54mMultiple Airlines

Deal found 4/17

$408

Fri 5/234:45 pmBOI - SGF

1 stop26h 29mAllegiant Air

Sun 6/11:38 pmSGF - BOI

1 stop27h 17mAllegiant Air

Deal found 4/16

$416

Fri 5/3012:16 pmBOI - STL

2 stops19h 59mSpirit Airlines

Sun 6/110:10 amSTL - BOI

2 stops26h 11mSpirit Airlines

Deal found 4/17

$464

Sat 5/2412:50 pmBOI - MCI

1 stop7h 02mDelta

Wed 5/285:35 pmMCI - BOI

1 stop7h 47mDelta

Deal found 4/17

$303

Sat 10/45:50 amGEG - MCI

2 stops11h 15mSouthwest

Mon 10/66:00 amMCI - GEG

1 stop5h 15mSouthwest

Deal found 4/17

$312

Tue 5/135:25 pmBOI - STL

1 stop5h 33mUnited Airlines

Mon 5/265:20 amSTL - BOI

1 stop5h 26mUnited Airlines

Deal found 4/17

$327

Last-minute flights from Idaho to Missouri
Discover last-minute flight deals from Idaho to Missouri. Data last updated April 17, 2025 and is based on user searches.

Wed 4/235:34 amGEG - MCI

1 stop8h 54mAmerican Airlines

Sat 4/266:00 pmMCI - GEG

1 stop6h 59mAmerican Airlines

Deal found 4/16

$639

Wed 4/232:15 pmGEG - MCI

1 stop7h 00mDelta

Sat 4/266:40 amMCI - GEG

1 stop7h 02mDelta

Deal found 4/17

$672

Wed 4/2311:40 amGEG - MCI

2 stops8h 15mSouthwest

Sat 4/266:45 amMCI - GEG

1 stop7h 05mSouthwest

Deal found 4/17

$677

Wed 4/236:37 amBOI - MCI

1 stop6h 26mAmerican Airlines

Fri 4/254:58 pmMCI - BOI

1 stop6h 13mAmerican Airlines

Deal found 4/17

$705

Wed 4/232:00 pmBOI - MCI

2 stops8h 44mUnited Airlines

Fri 4/251:55 pmMCI - BOI

1 stop4h 57mUnited Airlines

Deal found 4/17

$710

Fri 4/2512:59 pmIDA - MCI

1 stop8h 05mAmerican Airlines

Mon 4/282:44 pmMCI - IDA

1 stop8h 26mAmerican Airlines

Deal found 4/15

$511

Fri 4/256:55 pmIDA - STL

1 stop4h 47mDelta

Mon 4/282:23 pmSTL - IDA

1 stop4h 52mDelta

Deal found 4/17

$561

Fri 4/256:55 pmIDA - MCI

1 stop4h 19mDelta

Mon 4/282:09 pmMCI - IDA

2 stops9h 47mDelta

Deal found 4/15

$616

Fri 4/254:15 pmIDA - MCI

2 stops29h 04mUnited Airlines

Mon 4/286:45 pmMCI - IDA

2 stops15h 47mUnited Airlines

Deal found 4/15

$718

Sun 4/272:41 pmBOI - STL

1 stop8h 18mHawaiian Airlines

Thu 5/16:30 amSTL - BOI

1 stop8h 17mHawaiian Airlines

Deal found 4/16

$581

Sun 4/272:28 pmBOI - STL

1 stop8h 13mDelta

Fri 5/27:40 amSTL - BOI

1 stop5h 30mDelta

Deal found 4/16

$582

Sun 4/276:30 amBOI - STL

1 stop5h 17mUnited Airlines

Thu 5/19:40 amSTL - BOI

2 stops12h 59mUnited Airlines

Deal found 4/16

$627

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 17, 2025.

Sat 5/1012:50 pmBOI - MCI

1 stop7h 02mDelta

Deal found 4/17

$134

Fri 5/165:40 pmBOI - STL

1 stop6h 19mDelta

Deal found 4/16

$144

Mon 4/288:36 pmGEG - SGF

1 stop19h 48mAllegiant Air

Deal found 4/17

$150

Fri 5/93:18 pmGEG - STL

1 stop6h 40mAmerican Airlines

Deal found 4/17

$154

Tue 7/81:39 pmGEG - MCI

1 stop8h 20mAmerican Airlines

Deal found 4/17

$154

Thu 5/81:38 pmBOI - MCI

1 stop8h 13mAmerican Airlines

Deal found 4/17

$160

Fri 5/97:25 pmGEG - STL

2 stops13h 27mDelta

Deal found 4/17

$163

Wed 6/46:50 pmIDA - STL

1 stop4h 43mDelta

Deal found 4/17

$164

Thu 5/153:02 pmJAC - STL

1 stop6h 43mAmerican Airlines

Deal found 4/16

$174

Mon 6/235:57 pmGEG - MCI

2 stops22h 58mMultiple Airlines

Deal found 4/17

$177

Mon 5/51:52 pmBOI - MCI

2 stops25h 10mSpirit Airlines

Deal found 4/17

$179

Sat 5/102:00 pmBOI - MCI

2 stops8h 44mUnited Airlines

Deal found 4/17

$184

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

Sat 10/4

2:45 pm-11:56 pm

1 stop8h 11m

Lambert-St Louis

Tue 10/7

7:00 am-1:45 pm

1 stop7h 45m

$286

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 7/3

6:10 pm-12:43 am

1 stop5h 33m

Lambert-St Louis

Fri 7/11

6:30 am-10:57 am

1 stop5h 27m

$287

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 6/5

5:43 pm-11:29 pm

1 stop4h 46m

Kansas City

Sat 6/7

6:00 am-9:46 am

1 stop4h 46m

$293

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Tue 5/20

4:40 pm-11:00 pm

1 stop5h 20m

Kansas City

Sun 5/25

6:55 am-10:35 am

1 stop4h 40m

$299

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Wed 6/4

3:18 pm-11:48 pm

1 stop6h 30m

Lambert-St Louis

Sun 6/8

6:00 am-1:11 pm

1 stop9h 11m

$303

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Sat 5/24

12:50 pm-8:52 pm

1 stop7h 02m

Kansas City

Wed 5/28

5:35 pm-12:22 am

1 stop7h 47m

$303

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Wed 6/4

7:25 pm-10:47 am

2 stops13h 22m

Lambert-St Louis

Sun 6/8

5:45 pm-11:11 pm

1 stop7h 26m

$306

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Fri 5/16

2:15 pm-11:08 pm

1 stop6h 53m

Kansas City

Thu 5/22

6:05 pm-11:38 pm

1 stop7h 33m

$307

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Sat 10/4

5:50 am-7:05 pm

2 stops11h 15m

Kansas City

Mon 10/6

6:00 am-9:15 am

1 stop5h 15m

$312

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

Mon 5/26

5:20 am-9:46 am

1 stop5h 26m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,887 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,280 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,916 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,380 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,667 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 ($134), Allegiant Air ($150), and American Airlines ($154).
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$432	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$173	Average$440	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$226	Average$426	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$292	Average$568	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$315	Average$464	FlexibilityNo cancel fee	On-time63%

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$134+ 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 5/10. 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 17, 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 17, 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 17, 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 17, 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

100% Free

Book with Flexibility

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 17, 2025.