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Idaho

$52+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Missouri to Idaho

Keep the following information in mind while searching for Missouri to Idaho flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$111
(Frontier)

One-way from

$52
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$414
Provider with most accurate pricing for Lambert-St Louis-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Boise Air Term. Gowen Fld flights.
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From Missouri to Idaho
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One-way flight from Missouri to Idaho
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/29. 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 12/48:09 pmMCI - BOI
1 stop16h 40mFrontier
Thu 12/1112:44 pmBOI - MCI
1 stop24h 09mFrontier
Deal found 10/29$111
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Wed 11/127:45 pmSTL - GEG
1 stop17h 23mFrontier
Sun 11/1612:03 pmGEG - STL
1 stop19h 04mFrontier
Deal found 10/28$171
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 12/198:45 pmMCI - BOI
1 stop16h 14mMultiple Airlines
Mon 12/2210:41 pmBOI - MCI
2 stops34h 27mMultiple Airlines
Deal found 10/29$177
This Delta deal was found by Cheapflights users on 10/28. 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.
Fri 12/52:20 pmSTL - GEG
2 stops10h 29mDelta
Sun 12/71:10 pmGEG - STL
2 stops9h 38mDelta
Deal found 10/28$236
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1411:58 amMCI - GEG
1 stop7h 04mFrontier
Sun 12/2112:02 pmGEG - MCI
1 stop5h 49mFrontier
Deal found 10/30$243
This Orbitz deal was found by Cheapflights users on 10/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:52 amMCI - GEG
1 stop7h 14mMultiple Airlines
Mon 12/81:33 pmGEG - MCI
1 stop8h 25mMultiple Airlines
Deal found 10/29$253
This Delta deal was found by Cheapflights users on 10/28. 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.
Fri 12/52:38 pmSTL - GEG
2 stops11h 33mDelta
Mon 12/86:05 amGEG - STL
2 stops11h 05mDelta
Deal found 10/28$268
This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:52 amMCI - GEG
1 stop7h 14mFrontier
Sun 1/412:02 pmGEG - MCI
1 stop5h 49mFrontier
Deal found 10/30$276
This Delta deal was found by Cheapflights users on 10/28. 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 12/46:15 amSTL - GEG
1 stop7h 55mDelta
Sun 12/711:19 amGEG - STL
2 stops11h 29mDelta
Deal found 10/28$281
This Delta deal was found by Cheapflights users on 10/29. 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.
Fri 12/52:20 pmSTL - BOI
2 stops10h 44mDelta
Wed 12/1011:44 amBOI - STL
2 stops10h 45mDelta
Deal found 10/29$284
This Delta deal was found by Cheapflights users on 10/29. 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 12/116:15 amSTL - GEG
2 stops10h 40mDelta
Wed 12/176:05 amGEG - STL
2 stops11h 05mDelta
Deal found 10/29$286
This Delta deal was found by Cheapflights users on 10/28. 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 11/126:28 amMCI - JAC
1 stop6h 33mDelta
Sun 11/165:50 pmJAC - MCI
1 stop5h 34mDelta
Deal found 10/28$289

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 October 30, 2025.
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

Kansas CityBoise

MCI - BOI

MCIBOI

Kansas City

Thu 12/4

10:52 am-11:49 am

2 stops25h 57m

Boise Air Term. Gowen Fld

Thu 12/11

12:44 pm-7:14 pm

1 stop5h 30m

$188

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Fri 12/5

2:20 pm-10:49 pm

2 stops10h 29m

Spokane

Sun 12/7

1:10 pm-12:48 am

2 stops9h 38m

$236

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Fri 12/5

2:20 pm-10:49 pm

2 stops10h 29m

Spokane

Mon 12/8

7:35 pm-9:10 am

2 stops11h 35m

$236

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Thu 12/4

2:20 pm-10:49 pm

2 stops10h 29m

Spokane

Sun 12/7

1:10 pm-12:48 am

2 stops9h 38m

$236

Kansas CityHailey

MCI - SUN

MCISUN

Kansas City

Sat 4/25

6:40 am-12:35 pm

1 stop6h 55m

Hailey Sun Valley-Friedman

Wed 4/29

7:30 am-1:10 pm

1 stop4h 40m

$241

Kansas CitySpokane

MCI - GEG

MCIGEG

Kansas City

Thu 12/4

10:52 am-4:06 pm

1 stop7h 14m

Spokane

Mon 12/8

1:33 pm-11:58 pm

1 stop8h 25m

$253

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Tue 1/13

6:35 am-6:47 pm

2 stops14h 12m

Spokane

Tue 1/20

9:20 am-9:38 pm

2 stops10h 18m

$274

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Thu 12/4

6:00 am-12:02 pm

1 stop8h 02m

Spokane

Sat 12/6

6:05 am-11:27 pm

2 stops15h 22m

$281

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 12/5

2:20 pm-12:04 am

2 stops10h 44m

Boise Air Term. Gowen Fld

Wed 12/10

11:44 am-11:29 pm

2 stops10h 45m

$284

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

Wed 11/12

6:00 am-3:25 pm

2 stops10h 25m

Jackson Hole

Sun 11/16

7:00 am-12:45 pm

1 stop4h 45m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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 July is currently the most expensive (average of $286). 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 MO to ID?

Find hourly flight availability from Missouri to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from Missouri to Idaho in the evening. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight in the morning.

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

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

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

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 October 30, 2025.
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
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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
11,217 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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
4,243 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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
7.9
Good
7,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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
8,998 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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
11,035 reviews
Alaska Airlines
8.0
Very good
11,217 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

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 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 Frontier, Delta, and United Airlines fly from Missouri to Idaho in about 10h 25m. The time it takes to get you to your destination can typically vary by up to 15h 32m. Missouri and Idaho are separated by a distance of 879 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 $66 on Frontier. Other airlines that offer cheap prices include Delta from $138 and American Airlines from $145 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 July is currently the most expensive (average of $286). 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 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$182Average$406FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$436FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$216Average$393FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$236Average$545FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$266Average$450FlexibilityNo cancel feeOn-time63%

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