Idaho

$115+ Cheap flights from Missouri to Idaho

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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
abr 16 — abr 231
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Cheap flight deals from Missouri to Idaho

Cheapest flights from Missouri to Idaho
Explore the most affordable flight options available from Missouri to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on março 17, 2026.

This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/88:16 pm
STL
-
GEG
1 stop16h 05m
Frontier
dom 4/1211:06 am
GEG
-
STL
1 stop20h 42m
Frontier
Deal found 3/14$239
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/48:16 pm
STL
-
BOI
1 stop15h 52m
Frontier
dom 4/1212:03 pm
BOI
-
STL
1 stop20h 45m
Frontier
Deal found 3/12$240
This Booking.com deal was found by Cheapflights users on 3/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/252:51 pm
MCI
-
GEG
1 stop21h 58m
Frontier
dom 5/311:44 am
GEG
-
MCI
1 stop23h 46m
Frontier
Deal found 3/12$243
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/146:15 am
MCI
-
BOI
1 stop14h 33m
Alaska Airlines
sáb 4/186:00 am
BOI
-
MCI
1 stop16h 59m
Alaska Airlines
Deal found 3/12$267
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/287:05 am
MCI
-
GEG
1 stop7h 27m
American Airlines
sáb 5/21:22 pm
GEG
-
MCI
1 stop8h 37m
American Airlines
Deal found 3/13$277
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/73:50 pm
STL
-
BOI
1 stop8h 07m
Alaska Airlines
qua 4/82:22 pm
BOI
-
STL
1 stop8h 37m
Alaska Airlines
Deal found 3/12$277
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/115:00 am
MCI
-
BOI
1 stop9h 03m
American Airlines
sáb 4/181:29 pm
BOI
-
MCI
1 stop8h 28m
American Airlines
Deal found 3/13$277
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/202:34 pm
MCI
-
BOI
1 stop22h 56m
Frontier
dom 5/241:25 pm
BOI
-
MCI
1 stop23h 24m
Frontier
Deal found 3/13$279
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/65:30 am
STL
-
BOI
2 stops8h 00m
Southwest
qua 5/134:05 pm
BOI
-
STL
1 stop6h 10m
Southwest
Deal found 3/15$282
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/146:00 am
MCI
-
BOI
1 stop4h 54m
United Airlines
sáb 4/189:26 am
BOI
-
MCI
2 stops10h 08m
United Airlines
Deal found 3/12$282
This Expedia deal was found by Cheapflights users on 3/12. 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.
qua 5/67:00 am
MCI
-
BOI
1 stop7h 52m
Alaska Airlines
dom 5/106:00 am
BOI
-
MCI
1 stop7h 04m
Alaska Airlines
Deal found 3/12$286
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/287:00 am
MCI
-
GEG
1 stop18h 11m
Alaska Airlines
sáb 5/22:45 pm
GEG
-
MCI
1 stop7h 14m
Alaska Airlines
Deal found 3/12$287

Find flight deals from Missouri to Idaho

Keep the following information in mind while searching for Missouri to Idaho flight deals. Data was last updated março 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$239
(Gotogate)

One-way from

$115
(Mytrip)

Popular in

February

Cheapest in

January

Average price

$538
Provider with most accurate pricing for Lambert-St Louis-Boise Air Term. Gowen Fld flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Boise Air Term. Gowen Fld flights.
From Missouri to Idaho
One-way flight from Missouri to Idaho
Highest demand for flights based on searches. 10% potential increase in price ($51 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in March 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Idaho 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 março 17, 2026.
Use the filters below to find and compare flights from Missouri to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

ter 4/7

3:50 pm-10:57 pm

1 stop8h 07m

Boise Air Term. Gowen Fld

qua 4/8

2:22 pm-11:59 pm

1 stop8h 37m

$277

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

ter 4/14

6:00 am-9:54 am

1 stop4h 54m

Boise Air Term. Gowen Fld

sáb 4/18

9:26 am-8:34 pm

2 stops10h 08m

$282

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

qua 5/6

7:00 am-1:52 pm

1 stop7h 52m

Boise Air Term. Gowen Fld

dom 5/10

6:00 am-2:04 pm

1 stop7h 04m

$286

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

ter 4/21

7:05 am-2:40 pm

2 stops8h 35m

Boise Air Term. Gowen Fld

sáb 4/25

11:00 am-8:35 pm

2 stops8h 35m

$287

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

ter 4/14

2:30 pm-10:10 pm

2 stops8h 40m

Boise Air Term. Gowen Fld

sáb 4/18

11:00 am-8:35 pm

2 stops8h 35m

$287

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

ter 4/28

7:00 am-11:11 pm

1 stop18h 11m

Spokane

sáb 5/2

2:45 pm-11:59 pm

1 stop7h 14m

$287

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

ter 4/7

6:12 pm-10:11 pm

1 stop4h 59m

Boise Air Term. Gowen Fld

sáb 4/11

8:00 am-2:43 pm

1 stop5h 43m

$297

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

qua 6/3

4:40 pm-11:30 pm

1 stop7h 50m

Boise Air Term. Gowen Fld

seg 6/8

4:25 pm-12:30 am

2 stops7h 05m

$309

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

qua 4/15

6:15 am-1:58 pm

1 stop8h 43m

Boise Air Term. Gowen Fld

sáb 4/18

6:00 am-1:29 pm

1 stop6h 29m

$316

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

sáb 4/11

4:02 pm-9:09 pm

1 stop6h 07m

Boise Air Term. Gowen Fld

sáb 4/18

8:59 am-8:56 pm

2 stops10h 57m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Missouri to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Missouri 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 Missouri to Idaho

What is the cheapest month to book a flight from Missouri to Idaho?

Currently, June is the cheapest month in which you can book a flight from Missouri to Idaho (average of $133). Flying from Missouri to Idaho in January is currently the most expensive (average of $293). 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 Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated março 17, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Missouri to Idaho by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Related info for your journey

Find useful and relevant information for your journey from Missouri to Idaho. 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 Missouri to Idaho?

    Airlines like Alaska Airlines, United Airlines, and Southwest fly from Missouri to Idaho in about 4h 54m. The time it takes to get you to your destination can typically vary by up to 3h 41m. Missouri and Idaho are separated by a distance of 1148 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Missouri to Idaho one-way?

    One-way options have recently been found by users for as low as $82 on Southwest. Other airlines that offer cheap prices include United Airlines from $117 and Delta from $139 one-way.

  • Can I find deals for flights from Missouri to Idaho that include hotel bookings?

    Yes. In addition to deals on Missouri to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Idaho.

  • Can I find deals for business class flights from Missouri to Idaho?

    Yes. Cheapflights offers flight deals from Missouri to Idaho 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 Missouri to Idaho?

    Currently, June is the cheapest month in which you can book a flight from Missouri to Idaho (average of $133). Flying from Missouri to Idaho in January is currently the most expensive (average of $293). 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

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Alternative routes for Missouri to Idaho

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Missouri to Idaho

Discover the top 5 airlines that operate flights from Missouri to Idaho. 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 março 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$133Average$351FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$171Average$436FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$252Average$458FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$266Average$427FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$288Average$398FlexibilityNo cancel feeOn-time75%

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