Cheap Flights from St. Louis (STL) to Idaho Falls (IDA)

Popular airlines from Lambert-St. Louis International Airport (STL) to Idaho Falls Regional Airport (IDA)

Find the cheapest month to fly from St. Louis (STL) to Idaho Falls (IDA)

January is typically the cheapest month to fly

From AU$468 - AU$1,221 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Idaho Falls route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Idaho Falls Regional
Distance
1876 km

Your quick guide to flights from St. Louis to Idaho Falls

Pick up great flights from St. Louis to Idaho Falls

With Expedia, you have your pick of flights a day with airlines covering flights from St. Louis to Idaho Falls. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from St. Louis to Idaho Falls that take around hours.

Find cheap flights from St. Louis to Idaho Falls

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from St. Louis to Idaho Falls around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Idaho Falls is normally in .

Reasons to book your flight from St. Louis to Idaho Falls with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from St. Louis to Idaho Falls across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Idaho Falls right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from STL to Idaho Falls Regional Airport?
Round-trip flights from Lambert-St. Louis Intl. Airport (STL) to Idaho Falls Regional Airport start from . This price is based on fares available within the last 7 days on Expedia for flights departing within the next year — book today so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to IDA?
We get that things crop up unexpectedly, so we've made it as easy as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from STL to IDA that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for St. Louis Lambert International Airport to Idaho Falls Regional Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert-St. Louis Intl. Airport (STL) to Idaho Falls Regional Airport?
Around 1 900 kilometres separates St. Louis and Idaho Falls, so pack some in-flight entertainment to help you while away a few hours. That juicy novel you haven't started will be ideal.
Which airlines fly direct from Lambert Field to Idaho Falls Regional Airport?
You won't find any airlines flying directly between Lambert-St. Louis Intl. Airport (STL) and Idaho Falls Regional Airport (IDA), so be prepared to make at least one stop on your journey. A layover, whether short or long, can be a welcome way to break up a trip!
Are Lambert-St. Louis Intl. Airport (STL) to IDA flight tickets cheaper when they're purchased at the last minute?
Flight prices from Lambert-St. Louis Intl. Airport (STL) to Idaho Falls Regional Airport are available up to a year prior to departure on Expedia. And although you may occasionally pick up fantastic last-minute deals, it's never a sure thing. Also, booking your flights well in advance means you'll have more choices — and you can avoid ending up with the dreaded middle seat! We're always updating our fares to bring you the best bargains, so check back often for all the latest specials.

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