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>

$148 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, Nov 13 - Sat, Nov 15

9:16 pm - 1:57 pmGEG-STL

14h 41m1 stop

7:45 pm - 11:08 amSTL-GEG

17h 23m1 stop

$234Multiple Airlines

Find Deal

Thu, Nov 6 - Sat, Nov 8

9:16 pm - 1:57 pmGEG-STL

14h 41m1 stop

7:45 pm - 11:08 amSTL-GEG

17h 23m1 stop

$243Multiple Airlines

Find Deal

Thu, Dec 4 - Sat, Dec 6

12:23 pm - 10:02 amGEG-STL

19h 39m1 stop

7:43 pm - 11:28 amSTL-GEG

17h 45m1 stop

$249Frontier

Find Deal

Wed, Dec 3 - Mon, Dec 8

2:49 pm - 8:57 pmBOI-STL

5h 08m1 stop

5:30 pm - 11:44 pmSTL-BOI

7h 14m1 stop

$287United Airlines

Find Deal

Tue, Nov 11 - Thu, Nov 13

5:51 am - 3:18 pmGEG-STL

7h 27m1 stop

7:00 am - 12:26 pmSTL-GEG

7h 26m1 stop

$290Alaska Airlines

Find Deal

Sat, Oct 4 - Sat, Oct 11

2:23 pm - 11:09 pmGEG-STL

6h 46m1 stop

8:53 am - 1:29 pmSTL-GEG

6h 36m1 stop

$291Delta

Find Deal

Sun, Oct 5 - Wed, Oct 8

12:22 pm - 9:06 amBOI-STL

19h 44m1 stop

7:52 pm - 11:43 amSTL-BOI

16h 51m1 stop

$302Frontier

Find Deal

Mon, Nov 24 - Tue, Dec 2

4:43 pm - 12:46 amGEG-STL

6h 03m1 stop

7:56 pm - 11:56 pmSTL-GEG

6h 00m1 stop

$312Delta

Find Deal

Fri, Oct 24 - Mon, Oct 27

2:39 pm - 8:46 pmBOI-STL

5h 07m1 stop

5:29 pm - 11:28 pmSTL-BOI

6h 59m1 stop

$322United Airlines

Find Deal

Wed, Nov 12 - Sun, Nov 16

8:59 pm - 3:18 pmGEG-STL

16h 19m1 stop

4:14 pm - 10:59 pmSTL-GEG

8h 45m1 stop

$338Alaska Airlines

Find Deal

Cheapest round-trip

$234

Overall average: $416

Multiple Airlines

Thu 11/13Sat 11/15

GEG - STL • 1 stop

Cheapest one-way

$148

Typical prices: $226-341

Alaska Airlines

Sat 2/28

BOI - STL • 1 stop

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We hope you love your trip to St. Louis!

Useful Info

Low season	January
High season	October
Cheapest flight	$148

Best time to beat the crowds with an average 3% drop in price.

Most popular time to fly and prices are also 6% lower on average.

Flight from Boise 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.

O'Fallon

Wentzville

Farmington

Eureka

Litchfield

Grafton

Glencoe

Shrewsbury

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

$148 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

Everything you should know

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.

Traveling to a place near St. Louis?

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