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

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 Idaho to St. Louis. Visit our flight page for the latest deals!>/a>

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

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

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

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 to St. Louis with an airline and back to Idaho with another airline. Visit our flight page for the latest deals!>/a>

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

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 to St. Louis from Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$139 CHEAP FLIGHTS from Idaho to St. Louis

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Cheap Flights from Idaho to St. Louis

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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 Idaho to St. Louis

Thu, Aug 7 - Tue, Aug 12

1:08 pm - 11:51 pmGEG-STL

8h 43m1 stop

6:06 am - 12:22 pmSTL-GEG

8h 16m1 stop

$277American Airlines

Find Deal

Wed, Nov 5 - Tue, Nov 11

5:00 am - 12:39 pmBOI-STL

6h 39m1 stop

9:00 am - 1:25 pmSTL-BOI

5h 25m1 stop

$279United Airlines

Find Deal

Fri, Sep 19 - Sat, Sep 27

6:35 am - 2:39 pmBOI-STL

7h 04m1 stop

3:35 pm - 10:40 pmSTL-BOI

8h 05m1 stop

$286Hawaiian Airlines

Find Deal

Wed, Nov 5 - Tue, Nov 11

12:05 pm - 9:35 pmBOI-STL

8h 30m2 stops

10:25 am - 5:10 pmSTL-BOI

7h 45m2 stops

$289Southwest

Find Deal

Thu, Aug 7 - Tue, Aug 12

11:09 pm - 8:26 amGEG-STL

7h 17m1 stop

7:35 am - 2:45 pmSTL-GEG

9h 10m2 stops

$291Delta

Find Deal

Wed, Nov 5 - Tue, Nov 11

7:30 am - 5:57 pmBOI-STL

9h 27m2 stops

7:30 am - 8:16 pmSTL-BOI

13h 46m2 stops

$306Delta

Find Deal

Sat, Aug 30 - Sun, Aug 31

8:46 pm - 2:39 pmBOI-STL

16h 53m1 stop

6:30 pm - 7:20 amSTL-BOI

13h 50m2 stops

$340Alaska Airlines

Find Deal

Fri, Oct 17 - Sun, Oct 19

4:25 pm - 11:55 pmGEG-STL

5h 30m1 stop

10:30 pm - 9:15 amSTL-GEG

12h 45m1 stop

$342Southwest

Find Deal

Fri, Sep 19 - Sat, Sep 27

6:35 am - 2:39 pmBOI-STL

7h 04m1 stop

6:00 am - 4:50 pmSTL-BOI

11h 50m2 stops

$346Alaska Airlines

Find Deal

Thu, Jul 17 - Tue, Jul 22

9:45 am - 6:35 pmGEG-STL

6h 50m1 stop

3:24 pm - 10:56 pmSTL-GEG

9h 32m1 stop

$373Hawaiian Airlines

Find Deal

Useful Info

Low season	January
High season	July
Cheapest flight	$139

Best time to beat the crowds with an average 1% drop in price.

Most popular time to fly and prices are also 8% lower on average.

Flight from Spokane to St. Louis

How does KAYAK find such low prices on flights from Idaho to St. Louis?
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 Idaho to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from 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 Idaho to St. Louis?
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 to St. Louis with an airline and back to Idaho with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho to St. Louis?
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 to St. Louis from 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 to St. Louis

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in St. Louis

St. Louis (STL)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

STL

$139 Find Cheap Flights from Idaho to St. Louis

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

Cheap Flights from Idaho to St. Louis

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

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

Recent last minute flight deals from Idaho to St. Louis

Good to know

FAQs for booking flights from Idaho to St. Louis

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

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 Idaho to St. Louis.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from 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 Idaho to St. Louis?

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 to St. Louis with an airline and back to Idaho with another airline.

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

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 to St. Louis from 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 to St. Louis

Information on the airport you'll fly into in St. Louis

Cabin class types available on flights to Idaho

Complete your trip to St. Louis with a hotel stay or car rental

Find direct flights for St. Louis

Flights to other popular destinations

Flights from domestic origins to St. Louis

Choose which airport to fly into in St. Louis

Find deals for your return flight