HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$99+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Missouri to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 septiembre 16, 2025.

Round-trip from

$164
(Booking.com)

One-way from

$99
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$318
From Missouri to Idaho
Search Deals
One-way flight from Missouri to Idaho
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 septiembre 16, 2025.

This Booking.com deal was found by Cheapflights users on 9/16. 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.
mié. 10/17:55 pmSTL - BOI
1 stop16h 42mFrontier
dom. 10/512:22 pmBOI - STL
1 stop19h 44mFrontier
Deal found 9/16$164
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
mié. 11/57:45 pmSTL - BOI
1 stop17h 03mMultiple Airlines
lun. 11/106:22 pmBOI - STL
2 stops37h 45mMultiple Airlines
Deal found 9/13$243
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/157:52 pmSTL - BOI
1 stop16h 51mFrontier
dom. 10/1912:28 pmBOI - STL
1 stop19h 39mFrontier
Deal found 9/15$244
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/176:00 amMCI - JAC
1 stop4h 42mUnited Airlines
jue. 10/234:18 pmJAC - MCI
1 stop6h 12mUnited Airlines
Deal found 9/15$249
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/16:00 amMCI - JAC
1 stop4h 42mUnited Airlines
mar. 10/75:56 pmJAC - MCI
1 stop4h 34mUnited Airlines
Deal found 9/14$259
This American Airlines deal was found by Cheapflights users on 9/13. 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.
mar. 10/286:00 amSGF - JAC
1 stop7h 29mAmerican Airlines
mar. 11/41:06 pmJAC - SGF
1 stop5h 03mAmerican Airlines
Deal found 9/13$269
This American Airlines deal was found by Cheapflights users on 9/13. 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.
mar. 12/237:01 amSGF - GEG
1 stop7h 08mAmerican Airlines
mié. 12/316:47 amGEG - SGF
1 stop6h 25mAmerican Airlines
Deal found 9/13$269
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/305:18 pmMCI - JAC
1 stop4h 31mUnited Airlines
sáb. 10/45:56 pmJAC - MCI
1 stop4h 34mUnited Airlines
Deal found 9/14$269
This Delta deal was found by Cheapflights users on 9/16. 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.
mié. 10/87:30 pmSTL - BOI
1 stop5h 29mDelta
mar. 10/1411:12 amBOI - STL
1 stop6h 28mDelta
Deal found 9/16$277
This United Airlines deal was found by Cheapflights users on 9/16. 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.
mié. 10/85:15 amSTL - BOI
2 stops9h 28mUnited Airlines
mié. 10/222:39 pmBOI - STL
1 stop5h 07mUnited Airlines
Deal found 9/16$282
This Hawaiian Airlines deal was found by Cheapflights users on 9/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/57:00 amSTL - BOI
1 stop9h 12mHawaiian Airlines
lun. 11/102:20 pmBOI - STL
1 stop8h 39mHawaiian Airlines
Deal found 9/16$286
This Southwest deal was found by Cheapflights users on 9/16. 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.
mié. 10/85:40 amSTL - BOI
1 stop7h 10mSouthwest
mié. 10/223:15 pmBOI - STL
1 stop7h 55mSouthwest
Deal found 9/16$287

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 septiembre 16, 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

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

mié. 10/1

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

dom. 10/5

12:22 pm-9:06 am

1 stop19h 44m

$164

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

mié. 10/15

7:52 pm-11:43 am

1 stop16h 51m

Boise Air Term. Gowen Fld

dom. 10/19

12:28 pm-9:07 am

1 stop19h 39m

$244

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

jue. 10/16

6:00 am-9:42 am

1 stop4h 42m

Jackson Hole

lun. 10/20

5:56 pm-11:30 pm

1 stop4h 34m

$249

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

vie. 10/17

6:00 am-9:42 am

1 stop4h 42m

Jackson Hole

jue. 10/23

4:18 pm-11:30 pm

1 stop6h 12m

$249

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

vie. 10/17

6:00 am-9:42 am

1 stop4h 42m

Jackson Hole

lun. 10/20

5:56 pm-11:30 pm

1 stop4h 34m

$249

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

jue. 10/16

6:15 pm-9:29 pm

1 stop4h 14m

Jackson Hole

mar. 10/21

6:55 pm-12:18 am

1 stop4h 23m

$259

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

vie. 10/17

6:15 pm-9:29 pm

1 stop4h 14m

Jackson Hole

jue. 10/23

6:55 pm-12:18 am

1 stop4h 23m

$259

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

mié. 10/1

6:00 am-9:42 am

1 stop4h 42m

Jackson Hole

mar. 10/7

5:56 pm-11:30 pm

1 stop4h 34m

$259

SpringfieldSpokane

SGF - GEG

SGFGEG

Springfield-Branson

mar. 12/23

7:01 am-12:09 pm

1 stop7h 08m

Spokane

mié. 12/31

6:47 am-3:12 pm

1 stop6h 25m

$269

Kansas CityJackson

MCI - JAC

MCIJAC

Kansas City

mar. 9/30

5:18 pm-8:49 pm

1 stop4h 31m

Jackson Hole

sáb. 10/4

5:56 pm-11:30 pm

1 stop4h 34m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
1
2
3
...
6

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, October is the cheapest month in which you can book a flight from Missouri to Idaho (average of $314). Flying from Missouri to Idaho in June is currently the most expensive (average of $398). 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 septiembre 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Idaho as you normally would.

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 septiembre 16, 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
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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, United Airlines, and Delta fly from Missouri to Idaho in about 4h 14m. The time it takes to get you to your destination can typically vary by up to 12h 28m. 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 $99 on Frontier. Other airlines that offer cheap prices include Hawaiian Airlines from $141 and Alaska 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, October is the cheapest month in which you can book a flight from Missouri to Idaho (average of $314). Flying from Missouri to Idaho in June is currently the most expensive (average of $398). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Missouri to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Miami flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
LaGuardia to Dallas/Fort Worth flights
Dallas/Fort Worth to Seattle flights
Newark to Fort Lauderdale flights
John F Kennedy Intl to O'Hare Intl flights
Los Angeles to Newark flights
O'Hare Intl to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Newark to Las Vegas flights
LaGuardia to O'Hare Intl flights
LaGuardia to Fort Lauderdale flights
Seattle to Las Vegas flights
O'Hare Intl to Las Vegas flights
Newark to O'Hare Intl flights
O'Hare Intl to LaGuardia flights
Newark to Miami flights
San Francisco to Las Vegas flights
John F Kennedy Intl to Atlanta flights
John F Kennedy Intl to Orlando flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
Dallas/Fort Worth to O'Hare Intl flights
John F Kennedy Intl to San Francisco flights
Seattle to Dallas/Fort Worth flights
Seattle to Los Angeles flights
Newark to Los Angeles flights
Dallas/Fort Worth to Denver flights
LaGuardia to Miami flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to LaGuardia flights
O'Hare Intl to Dallas/Fort Worth flights
San Francisco to Newark flights
Newark to Orlando flights
O'Hare Intl to Newark flights
Atlanta to John F Kennedy Intl flights
Dallas/Fort Worth to Los Angeles flights
Los Angeles to O'Hare Intl flights
Dallas/Fort Worth to Newark flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Sky Harbor Intl flights
Dulles Intl to Dallas/Fort Worth flights
Atlanta to Las Vegas flights

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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$182Average$407FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$440FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$216Average$393FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$236Average$530FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$266Average$449FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.