How does KAYAK find such low prices on flights from St. Louis to Idaho?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Idaho.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Idaho?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from St. Louis to Idaho?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Idaho with an airline and back with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Idaho?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Which airlines provide the cheapest flights from St. Louis to Idaho?

In the past 5 days, the cheapest round-trip tickets from St. Louis to Idaho were found on Alaska Airlines ($354) and United Airlines ($360).

Which airlines provide the cheapest flights from St. Louis to Idaho?

In the past 5 days, the cheapest round-trip tickets from St. Louis to Idaho were found on Alaska Airlines ($354) and United Airlines ($360).

How long does a flight from St. Louis to Idaho take?

The duration of a flight to Idaho depends on your arrival airport. The shortest routes to Idaho from St. Louis are to Pocatello , which takes 4h 51m , Idaho Falls , which takes 4h 52m, and Boise , which takes 5h 14m.

How long does a flight from St. Louis to Idaho take?

The duration of a flight to Idaho depends on your arrival airport. The shortest routes to Idaho from St. Louis are to Pocatello , which takes 4h 51m , Idaho Falls , which takes 4h 52m, and Boise , which takes 5h 14m.

$110 CHEAP FLIGHTS from St. Louis to Idaho

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Flight Deals

One-wayRound-trip

Boise1 stop$252

Idaho Falls1 stop$329

Lewiston1 stop$847

Pocatello1 stop$537

Spokane1 stop$369

Boise1 stop$252

Idaho Falls1 stop$329

Lewiston1 stop$847

Pocatello1 stop$537

Spokane1 stop$369

Book Cheap St. Louis to Idaho Plane Tickets

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from St. Louis to Idaho

Thu, Sep 10 - Thu, Sep 17

12:17 pm - 1:55 pm

STL

BOI

26h 38m

1 stop

2:50 pm - 11:27 am

BOI

STL

19h 37m

1 stop

$252Frontier

Wed, Sep 16 - Mon, Sep 21

12:17 pm - 1:55 pm

STL

BOI

26h 38m

1 stop

2:50 pm - 11:32 am

BOI

STL

19h 42m

1 stop

$261Frontier

Tue, Aug 25 - Thu, Aug 27

6:00 am - 1:09 pm

STL

IDA

8h 09m

1 stop

2:20 pm - 10:41 pm

IDA

STL

7h 21m

1 stop

$329American Airlines

Mon, Aug 17 - Wed, Aug 26

6:00 am - 1:09 pm

STL

IDA

8h 09m

1 stop

2:20 pm - 11:42 pm

IDA

STL

8h 22m

1 stop

$354American Airlines

Tue, Aug 25 - Sat, Aug 29

6:35 am - 3:20 pm

STL

IDA

9h 45m

1 stop

6:18 am - 2:06 pm

IDA

STL

6h 48m

1 stop

$354Alaska Airlines

Tue, Aug 25 - Thu, Aug 27

8:00 am - 5:16 pm

STL

IDA

10h 16m

2 stops

2:25 pm - 8:46 pm

IDA

STL

5h 21m

1 stop

$360United Airlines

Tue, Aug 25 - Thu, Aug 27

8:00 am - 5:16 pm

STL

IDA

10h 16m

2 stops

2:25 pm - 8:46 pm

IDA

STL

5h 21m

1 stop

$361United Airlines

Thu, Sep 24 - Tue, Sep 29

2:25 pm - 11:58 pm

STL

BOI

10h 33m

2 stops

6:45 am - 5:37 pm

BOI

STL

9h 52m

2 stops

$364Delta

Thu, Nov 5 - Mon, Nov 9

7:45 am - 12:16 pm

STL

BOI

5h 31m

1 stop

6:50 pm - 12:30 am

BOI

STL

4h 40m

1 stop

$369Delta

Tue, Nov 17 - Wed, Nov 18

7:00 am - 2:22 pm

STL

GEG

9h 22m

1 stop

5:00 am - 2:15 pm

GEG

STL

7h 15m

1 stop

$369Alaska Airlines

Booking Insights

KAYAK's insights & trends for St. Louis to Idaho flights

Get data-powered insights and trends into flights from St. Louis to Idaho to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

How much is a round-trip flight from St. Louis to Idaho?

Flight prices are below average for this route right now.

Flights to Idaho from St. Louis usually cost between $357 and $676 in September.
The lowest price found in the past 5 days was $252 on Frontier (Sep 10-Sep 17).

What is the cheapest month to fly from St. Louis to Idaho?

The cheapest month for flights from St. Louis to Idaho is January, when tickets cost $359 (return) on average. On the other hand, the most expensive months are February and June, when the average cost of round-trip tickets is $566 and $522 respectively.

Find deals

Low season	January
High season	August
Cheapest flight	$110

Best time to beat the crowds with an average 16% drop in price.

Most popular time to fly and prices are also 10% lower on average.

Flight from St. Louis to Boise

How does KAYAK find such low prices on flights from St. Louis to Idaho?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Idaho.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Idaho?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from St. Louis to Idaho?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Idaho with an airline and back with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Idaho?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from St. Louis to Idaho

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Popular routes

Return flight deals

Information on your arrival and departure airports

St. Louis (STL)

$110 Find Cheap Flights from St. Louis to Idaho - Compare and Save

Cheap Flights from St. Louis to Idaho

Book Cheap St. Louis to Idaho Plane Tickets

Recent round-trip flight deals from St. Louis to Idaho

Recent one-way flight deals from St. Louis to Idaho

Recent last minute flight deals from St. Louis to Idaho

KAYAK's insights & trends for St. Louis to Idaho flights

How much is a round-trip flight from St. Louis to Idaho?

What is the cheapest month to fly from St. Louis to Idaho?

Which airlines provide the cheapest flights from St. Louis to Idaho?

How long does a flight from St. Louis to Idaho take?

Good to know

Low season

High season

Cheapest flight

FAQs - booking Idaho flights

Everything you need to know for your flight from St. Louis to Idaho

Information on your arrival and departure airports

Cabin class types available on flights to Idaho

Complete your trip to Idaho with a hotel stay or car rental

Flights to other popular destinations

Flights from other airports in St. Louis to Idaho

Flights from St. Louis to popular cities in Idaho

Find deals for your return flight