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Missouri

$95+ 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
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 January 14, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$237
(Delta)

One-way from

$95
(Frontier)

Popular in

January

Cheapest in

September

Average price

$750
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Lambert-St Louis flights.
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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. 21% potential increase in price ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 14, 2026.

This Delta deal was found by Cheapflights users on 1/13. 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 2/103:03 pm
BOI
-
STL
1 stop7h 22m
Delta
Tue 2/173:40 pm
STL
-
BOI
1 stop6h 15m
Delta
Deal found 1/13$237
This Delta deal was found by Cheapflights users on 1/13. 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 4/16:00 am
GEG
-
STL
1 stop6h 24m
Delta
Sat 4/46:29 am
STL
-
GEG
1 stop8h 42m
Delta
Deal found 1/13$237
This United Airlines deal was found by Cheapflights users on 1/13. 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 2/115:00 am
GEG
-
MCI
1 stop5h 37m
United Airlines
Wed 2/1810:24 am
MCI
-
GEG
1 stop9h 52m
United Airlines
Deal found 1/13$237
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/812:03 pm
GEG
-
STL
1 stop22h 47m
Frontier
Wed 2/113:28 pm
STL
-
GEG
1 stop21h 59m
Frontier
Deal found 1/14$244
This American Airlines deal was found by Cheapflights users on 1/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:00 am
GEG
-
MCI
1 stop9h 17m
American Airlines
Tue 3/1711:02 am
MCI
-
GEG
1 stop7h 52m
American Airlines
Deal found 1/12$261
This Expedia deal was found by Cheapflights users on 1/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:47 pm
GEG
-
MCI
1 stop5h 04m
Multiple Airlines
Tue 4/142:23 pm
MCI
-
GEG
1 stop9h 01m
Multiple Airlines
Deal found 1/12$266
This American Airlines deal was found by Cheapflights users on 1/14. 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 5/21:29 pm
BOI
-
SGF
1 stop6h 01m
American Airlines
Wed 5/66:00 am
SGF
-
BOI
1 stop7h 38m
American Airlines
Deal found 1/14$271
This Delta deal was found by Cheapflights users on 1/13. 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 2/146:45 am
GEG
-
STL
1 stop6h 09m
Delta
Thu 2/196:40 pm
STL
-
GEG
1 stop7h 14m
Delta
Deal found 1/13$274
This Delta deal was found by Cheapflights users on 1/14. 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 3/21:51 pm
BOI
-
STL
2 stops9h 34m
Delta
Wed 3/43:40 pm
STL
-
BOI
1 stop6h 15m
Delta
Deal found 1/14$276
This Delta deal was found by Cheapflights users on 1/13. 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.
Sun 9/611:20 am
IDA
-
MCI
1 stop5h 03m
Delta
Tue 9/156:40 am
MCI
-
IDA
1 stop6h 49m
Delta
Deal found 1/13$279
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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.
Tue 2/37:49 pm
GEG
-
MCI
1 stop16h 01m
Alaska Airlines
Tue 2/103:59 pm
MCI
-
GEG
2 stops10h 24m
Alaska Airlines
Deal found 1/13$285
This Delta deal was found by Cheapflights users on 1/12. 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.
Sat 3/73:01 pm
BOI
-
MCI
1 stop6h 59m
Delta
Mon 3/97:55 am
MCI
-
BOI
1 stop14h 05m
Delta
Deal found 1/12$291

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 January 14, 2026.
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

Tue 2/10

3:03 pm-11:25 pm

1 stop7h 22m

Lambert-St Louis

Tue 2/17

3:40 pm-8:55 pm

1 stop6h 15m

$237

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Wed 2/11

1:48 pm-8:33 pm

1 stop4h 45m

Kansas City

Wed 2/18

5:21 pm-9:17 pm

1 stop5h 56m

$237

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Wed 4/1

6:00 am-2:24 pm

1 stop6h 24m

Lambert-St Louis

Sat 4/4

6:29 am-1:11 pm

1 stop8h 42m

$237

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Tue 2/3

2:00 pm-11:27 pm

1 stop7h 27m

Kansas City

Tue 2/10

4:09 pm-7:54 pm

1 stop5h 45m

$237

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Thu 4/9

12:47 pm-7:51 pm

1 stop5h 04m

Kansas City

Tue 4/14

2:23 pm-9:24 pm

1 stop9h 01m

$266

SpokaneKansas City

GEG - MCI

GEGMCI

Spokane

Thu 2/19

12:22 pm-7:33 pm

1 stop5h 11m

Kansas City

Mon 2/23

2:49 pm-9:37 pm

1 stop8h 48m

$266

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Mon 3/2

1:51 pm-12:25 am

2 stops9h 34m

Lambert-St Louis

Wed 3/4

3:40 pm-8:55 pm

1 stop6h 15m

$276

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Sun 2/8

12:03 pm-11:33 pm

2 stops33h 30m

Lambert-St Louis

Wed 2/11

3:28 pm-11:27 am

1 stop21h 59m

$290

BoiseKansas City

BOI - MCI

BOIMCI

Boise Air Term. Gowen Fld

Wed 3/4

6:35 pm-11:59 pm

1 stop4h 24m

Kansas City

Sun 3/8

8:11 pm-11:59 pm

1 stop4h 48m

$295

SpokaneSt. Louis

GEG - STL

GEGSTL

Spokane

Thu 3/19

7:45 pm-9:01 am

2 stops11h 16m

Lambert-St Louis

Mon 3/23

1:39 pm-12:03 am

2 stops12h 24m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

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 December is currently the most expensive (average of $301). 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.

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 January 14, 2026.
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
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,713 reviews
Alaska Airlines
8.0
Very good
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Southwest
8.0
Very good
4,258 reviews
Alaska Airlines
8.0
Very good
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,048 reviews
Alaska Airlines
8.0
Very good
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,163 reviews
Alaska Airlines
8.0
Very good
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.2
Good
11,129 reviews
Alaska Airlines
8.0
Very good
11,713 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 Frontier can get you from Idaho to Missouri in just under 4h 45m. Your travel time can differ by up to 28h 45m. The distance from Idaho to Missouri is about 1273 mi. This flight may include one or multiple stops.

  • 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 December is currently the most expensive (average of $301). 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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$159Average$343FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$196Average$404FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$226Average$385FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$278Average$447FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$286Average$555FlexibilityNo cancel feeOn-time69%

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