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Idaho

$119+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Mar 3 — Mar 101
Tue 3/3
Tue 3/10
1 adult, Economy
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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 February 1, 2026.

This American Airlines deal was found by Cheapflights users on 1/30. 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 2/256:00 am
STL
-
GEG
1 stop7h 44m
American Airlines
Tue 3/312:25 pm
GEG
-
STL
1 stop6h 47m
American Airlines
Deal found 1/30$237
This Delta deal was found by Cheapflights users on 1/30. 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 2/284:12 pm
MCI
-
BOI
1 stop5h 43m
Delta
Sat 3/73:01 pm
BOI
-
MCI
1 stop6h 59m
Delta
Deal found 1/30$237
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/45:54 am
MCI
-
BOI
1 stop5h 18m
United Airlines
Tue 3/1012:59 pm
BOI
-
MCI
2 stops9h 16m
United Airlines
Deal found 1/30$242
This United Airlines deal was found by Cheapflights users on 1/30. 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.
Thu 2/262:45 pm
STL
-
GEG
1 stop8h 32m
United Airlines
Wed 3/47:00 am
GEG
-
STL
1 stop7h 02m
United Airlines
Deal found 1/30$264
This Delta deal was found by Cheapflights users on 2/1. 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 9/11:13 pm
MCI
-
JAC
1 stop8h 10m
Delta
Sun 9/65:30 pm
JAC
-
MCI
1 stop5h 50m
Delta
Deal found 2/1$269
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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 3/37:00 am
STL
-
GEG
1 stop9h 36m
Alaska Airlines
Wed 3/45:40 am
GEG
-
STL
1 stop6h 11m
Alaska Airlines
Deal found 1/30$272
This United Airlines deal was found by Cheapflights users on 1/31. 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.
Tue 2/2411:32 am
MCI
-
JAC
2 stops10h 27m
United Airlines
Sat 2/287:00 am
JAC
-
MCI
1 stop4h 44m
United Airlines
Deal found 1/31$274
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 6/166:04 am
MCI
-
IDA
1 stop4h 51m
United Airlines
Tue 6/232:31 pm
IDA
-
MCI
1 stop5h 02m
United Airlines
Deal found 2/1$279
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/38:41 am
STL
-
IDA
1 stop5h 49m
United Airlines
Tue 3/105:30 pm
IDA
-
STL
1 stop5h 04m
United Airlines
Deal found 2/1$279
This Delta deal was found by Cheapflights users on 2/1. 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 4/56:12 pm
STL
-
BOI
1 stop6h 47m
Delta
Sat 4/116:00 am
BOI
-
STL
1 stop7h 43m
Delta
Deal found 2/1$281
This United Airlines deal was found by Cheapflights users on 1/31. 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.
Thu 3/56:00 am
MCI
-
BOI
1 stop5h 06m
United Airlines
Tue 3/106:15 am
BOI
-
MCI
1 stop5h 39m
United Airlines
Deal found 1/31$281
This Delta deal was found by Cheapflights users on 2/1. 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 2/257:00 am
MCI
-
GEG
1 stop7h 35m
Delta
Sun 3/13:45 pm
GEG
-
MCI
1 stop6h 05m
Delta
Deal found 2/1$282

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 February 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$152
(Kiwi.com)

One-way from

$119
(American Airlines)

Popular in

February

Cheapest in

November

Average price

$553
Provider with most accurate pricing for Lambert-St Louis-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Boise Air Term. Gowen Fld flights.
Search Deals
From Missouri to Idaho
Search Deals
One-way flight from Missouri to Idaho
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 1, 2026.
Use the filters below to find and compare flights from Missouri to Idaho that are best for you.

Fly from

Missouri

Fly to

Idaho

Route

Depart

Return

Price

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Sat 4/25

6:00 am-12:42 pm

1 stop8h 42m

Spokane

Tue 4/28

1:33 pm-11:48 pm

1 stop8h 15m

$237

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Tue 3/3

7:00 am-12:29 pm

1 stop7h 29m

Spokane

Wed 3/4

5:40 am-1:51 pm

1 stop6h 11m

$237

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Wed 3/4

5:54 am-10:12 am

1 stop5h 18m

Boise Air Term. Gowen Fld

Tue 3/10

5:31 pm-11:15 pm

1 stop4h 44m

$237

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Thu 2/26

2:45 pm-9:17 pm

1 stop8h 32m

Spokane

Wed 3/4

7:00 am-4:02 pm

1 stop7h 02m

$264

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

Sat 3/21

2:40 pm-7:02 pm

1 stop5h 22m

Jackson Hole

Wed 3/25

2:41 pm-12:12 am

1 stop8h 31m

$269

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

Tue 2/24

5:54 am-9:51 am

1 stop4h 57m

Jackson Hole

Sat 2/28

7:00 am-12:44 pm

1 stop4h 44m

$269

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

Wed 2/25

5:54 am-9:51 am

1 stop4h 57m

Jackson Hole

Sat 2/28

7:00 am-12:44 pm

1 stop4h 44m

$269

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 6/16

6:04 am-9:55 am

1 stop4h 51m

Idaho Falls Fanning Field

Tue 6/23

2:31 pm-8:33 pm

1 stop5h 02m

$279

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

8:41 am-1:30 pm

1 stop5h 49m

Idaho Falls Fanning Field

Tue 3/10

5:30 pm-11:34 pm

1 stop5h 04m

$279

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sun 4/5

6:12 pm-11:59 pm

1 stop6h 47m

Boise Air Term. Gowen Fld

Sat 4/11

6:00 am-2:43 pm

1 stop7h 43m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 60 results
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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 $297). 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 February 1, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,825 reviews
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,273 reviews
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,128 reviews
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,223 reviews
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,211 reviews
Alaska Airlines
8.0
Very good
11,825 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 American Airlines, Alaska Airlines, and United Airlines fly from Missouri to Idaho in about 5h 18m. The time it takes to get you to your destination can typically vary by up to 3h 24m. 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 $297). 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.
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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 February 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$133Average$361FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$171Average$433FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$193Average$471FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$266Average$439FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$288Average$398FlexibilityNo cancel feeOn-time75%

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