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$132+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
Nov 11 — Nov 181
Tue 11/11
Tue 11/18
1 adult, Economy
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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 October 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/10. 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.
Mon 11/106:13 pmGEG - MCI
2 stops21h 06mMultiple Airlines
Sat 11/158:28 pmMCI - GEG
1 stop16h 40mMultiple Airlines
Deal found 10/10$232
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 11/57:40 amBOI - STL
2 stops10h 05mDelta
Sat 11/86:50 amSTL - BOI
2 stops10h 16mDelta
Deal found 10/12$256
This FlightHub deal was found by Cheapflights users on 10/10. 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.
Tue 11/118:21 amGEG - MCI
1 stop5h 33mMultiple Airlines
Sat 11/158:28 pmMCI - GEG
1 stop16h 40mMultiple Airlines
Deal found 10/10$259
This FlightHub deal was found by Cheapflights users on 10/10. 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.
Wed 11/128:21 amGEG - MCI
1 stop5h 33mMultiple Airlines
Sat 11/158:28 pmMCI - GEG
1 stop16h 40mMultiple Airlines
Deal found 10/10$260
This Delta deal was found by Cheapflights users on 10/12. 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 11/209:20 amGEG - STL
2 stops12h 03mDelta
Mon 11/2412:49 pmSTL - GEG
2 stops8h 09mDelta
Deal found 10/12$268
This Delta deal was found by Cheapflights users on 10/9. 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.
Tue 11/117:38 pmGEG - STL
2 stops11h 17mDelta
Thu 11/136:00 amSTL - GEG
2 stops10h 53mDelta
Deal found 10/9$276
This Delta deal was found by Cheapflights users on 10/10. 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 11/111:20 amGEG - STL
2 stops8h 03mDelta
Mon 11/36:00 amSTL - GEG
2 stops10h 57mDelta
Deal found 10/10$277
This Delta deal was found by Cheapflights users on 10/10. 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.
Mon 11/244:43 pmGEG - STL
1 stop6h 03mDelta
Tue 12/28:05 pmSTL - GEG
1 stop5h 54mDelta
Deal found 10/10$282
This Delta deal was found by Cheapflights users on 10/10. 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 11/81:15 pmGEG - MCI
1 stop8h 06mDelta
Sat 11/157:55 amMCI - GEG
1 stop8h 58mDelta
Deal found 10/10$285
This Alaska Airlines deal was found by Cheapflights users on 10/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:51 amGEG - STL
1 stop7h 27mAlaska Airlines
Mon 11/37:00 amSTL - GEG
1 stop8h 58mAlaska Airlines
Deal found 10/11$290
This American Airlines deal was found by Cheapflights users on 10/10. 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.
Sat 11/112:49 pmGEG - STL
1 stop7h 19mAmerican Airlines
Mon 11/311:42 amSTL - GEG
1 stop7h 00mAmerican Airlines
Deal found 10/10$291
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:20 amBOI - STL
1 stop9h 07mUnited Airlines
Sat 11/86:30 amSTL - BOI
1 stop6h 09mUnited Airlines
Deal found 10/12$297

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 October 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$232
(Kiwi.com)

One-way from

$132
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$401
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Lambert-St Louis 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. 19% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 12, 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

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 11/5

7:40 am-6:45 pm

2 stops10h 05m

Lambert-St Louis

Sat 11/8

6:50 am-4:06 pm

2 stops10h 16m

$256

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Tue 11/11

8:21 am-3:54 pm

1 stop5h 33m

Kansas City

Sat 11/15

8:28 pm-11:08 am

1 stop16h 40m

$259

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 11/20

9:20 am-11:23 pm

2 stops12h 03m

Lambert-St Louis

Mon 11/24

12:49 pm-6:58 pm

2 stops8h 09m

$268

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Sat 11/1

11:20 am-9:23 pm

2 stops8h 03m

Lambert-St Louis

Mon 11/3

2:29 pm-9:05 pm

2 stops8h 36m

$277

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Mon 11/24

4:43 pm-12:46 am

1 stop6h 03m

Lambert-St Louis

Tue 12/2

8:05 pm-11:59 pm

1 stop5h 54m

$282

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Tue 11/11

6:00 am-1:31 pm

1 stop5h 31m

Lambert-St Louis

Thu 11/13

6:34 am-2:53 pm

2 stops10h 19m

$283

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Sat 11/8

1:15 pm-11:21 pm

1 stop8h 06m

Kansas City

Sat 11/15

7:55 am-2:53 pm

1 stop8h 58m

$285

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Sat 11/1

5:51 am-3:18 pm

1 stop7h 27m

Lambert-St Louis

Mon 11/3

7:00 am-1:58 pm

1 stop8h 58m

$290

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Wed 11/12

2:31 pm-8:47 pm

1 stop5h 16m

Kansas City

Thu 11/13

6:00 am-11:39 am

1 stop6h 39m

$302

BoiseSpringfield

BOI - SGF

BOISGF

Boise Air Term. Gowen Fld

Sat 11/1

1:26 pm-9:27 pm

1 stop7h 01m

Springfield-Branson

Tue 11/4

4:07 pm-10:32 pm

1 stop7h 25m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/11

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, April is the cheapest month in which you can book a flight from Idaho to Missouri (average of $113). Flying from Idaho to Missouri in January is currently the most expensive (average of $269). 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 October 12, 2025.

It’s optimal to fly from Idaho to Missouri in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Idaho to Missouri. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Idaho to Missouri flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 12, 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
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,065 reviews
Alaska Airlines
8.0
Very good
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,235 reviews
Alaska Airlines
8.0
Very good
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,971 reviews
Alaska Airlines
8.0
Very good
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,970 reviews
Alaska Airlines
8.0
Very good
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
American Airlines
7.2
Good
11,046 reviews
Alaska Airlines
8.0
Very good
11,065 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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?

    Delta, United Airlines, and American Airlines can get you from Idaho to Missouri in just under 7h 01m. Your travel time can differ by up to 3h 04m. The distance from Idaho to Missouri is about 1272 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 ($132), Delta ($137), and American Airlines ($144).

  • 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, April is the cheapest month in which you can book a flight from Idaho to Missouri (average of $113). Flying from Idaho to Missouri in January is currently the most expensive (average of $269). 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 October 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$159Average$395FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$385FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$261Average$421FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$278Average$557FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$286Average$561FlexibilityNo cancel feeOn-time69%

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