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Missouri

$84+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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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 August 20, 2025.

Round-trip from

$201
(Cheapflightsfares)

One-way from

$84
(FlightHub)

Popular in

August

Cheapest in

November

Average price

$600
From Idaho to Missouri
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One-way flight from Idaho to Missouri
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Highest demand for flights based on searches. 10% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:48 pmBOI - MCI
1 stop10h 52mSpirit Airlines
Sun 12/147:00 amMCI - BOI
1 stop5h 53mSpirit Airlines
Deal found 8/18$201
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:22 pmBOI - MCI
1 stop24h 26mMultiple Airlines
Mon 9/222:55 pmMCI - BOI
1 stop6h 36mMultiple Airlines
Deal found 8/18$207
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2111:53 amGEG - MCI
1 stop23h 55mFrontier
Thu 9/253:01 pmMCI - GEG
1 stop21h 57mFrontier
Deal found 8/18$212
This FlightHub deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:16 pmBOI - MCI
1 stop22h 44mSpirit Airlines
Mon 9/222:55 pmMCI - BOI
1 stop6h 36mSpirit Airlines
Deal found 8/19$217
This Frontier deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:53 amGEG - STL
1 stop19h 13mFrontier
Wed 9/107:55 pmSTL - GEG
1 stop17h 03mFrontier
Deal found 8/19$229
This FlightHub deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/712:22 pmBOI - STL
1 stop19h 44mFrontier
Sat 9/137:55 pmSTL - BOI
1 stop16h 42mFrontier
Deal found 8/20$235
This FlightHub deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2812:22 pmBOI - STL
1 stop19h 44mFrontier
Thu 10/27:55 pmSTL - BOI
1 stop16h 42mFrontier
Deal found 8/19$245
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/271:00 pmGEG - STL
1 stop6h 21mDelta
Tue 9/307:00 pmSTL - GEG
1 stop6h 35mDelta
Deal found 8/17$245
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/252:16 pmBOI - MCI
1 stop22h 44mSpirit Airlines
Sun 9/284:05 pmMCI - BOI
2 stops29h 26mSpirit Airlines
Deal found 8/18$248
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/272:16 pmBOI - MCI
1 stop22h 44mSpirit Airlines
Mon 9/292:55 pmMCI - BOI
1 stop6h 36mSpirit Airlines
Deal found 8/18$250
This American Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:06 pmBOI - STL
1 stop8h 44mAmerican Airlines
Tue 11/112:29 pmSTL - BOI
1 stop6h 28mAmerican Airlines
Deal found 8/20$251
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:58 pmGEG - STL
1 stop7h 16mDelta
Mon 9/155:32 pmSTL - GEG
1 stop8h 26mDelta
Deal found 8/18$253

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Idaho to Missouri that are best for you.

Fly from

Idaho

Fly to

Missouri

Route

Depart

Return

Price

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Tue 12/9

12:48 pm-12:40 am

1 stop10h 52m

Kansas City

Sun 12/14

7:00 am-11:53 am

1 stop5h 53m

$201

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 12/11

12:48 pm-12:40 am

1 stop10h 52m

Kansas City

Sun 12/14

7:00 am-11:53 am

1 stop5h 53m

$201

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Thu 9/18

12:22 pm-1:48 pm

1 stop24h 26m

Kansas City

Mon 9/22

2:55 pm-8:31 pm

1 stop6h 36m

$207

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Sun 9/21

11:53 am-1:48 pm

1 stop23h 55m

Kansas City

Thu 9/25

3:01 pm-10:58 am

1 stop21h 57m

$212

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

$217

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 9/4

11:53 am-9:06 am

1 stop19h 13m

Lambert-St Louis

Wed 9/10

7:55 pm-10:58 am

1 stop17h 03m

$229

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sun 9/7

12:22 pm-9:06 am

1 stop19h 44m

Lambert-St Louis

Sat 9/13

7:55 pm-11:37 am

1 stop16h 42m

$235

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 1/20

7:20 pm-1:52 pm

1 stop16h 32m

Lambert-St Louis

Mon 2/2

2:55 pm-8:59 pm

1 stop8h 04m

$244

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Sat 9/27

1:00 pm-9:21 pm

1 stop6h 21m

Lambert-St Louis

Tue 9/30

7:00 pm-11:35 pm

1 stop6h 35m

$245

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Wed 9/10

2:21 pm-11:23 pm

1 stop7h 02m

Lambert-St Louis

Mon 9/15

7:00 pm-11:35 pm

1 stop6h 35m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 60 results
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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?

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 August 20, 2025.

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.

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated August 20, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Idaho to Missouri have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
United Airlines
7.4
Good
8,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.

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.

  • How long is the flight from Idaho to Missouri?

    Spirit Airlines, Frontier, and Alaska Airlines can get you from Idaho to Missouri in just under 10h 52m. Your travel time can differ by up to 13h 03m. The distance from Idaho to Missouri is about 1148 mi. This flight may include one or multiple stops.

  • 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 ($84), Spirit Airlines ($110), and Delta ($134).

  • 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

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Alternative routes for Idaho to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Idaho to Missouri

Discover the top 5 airlines that operate flights from Idaho to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$156Average$405FlexibilityNo cancel feeOn-time75%
DeltaCheapest$159Average$394FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$387FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$281Average$450FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$292Average$585FlexibilityNo cancel feeOn-time69%

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