Cheap flights from St. Louis to Idaho Falls from $214
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Idaho Falls departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from St. Louis to Idaho Falls
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United Airlines flights from St. Louis to Idaho Falls
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How to get the cheapest flight ticket from St. Louis to Idaho Falls
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Idaho Falls?
If you aren’t able to travel to Idaho Falls during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $450.
What is the cheapest day to depart on your flight to Idaho Falls?
Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $605. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Monday is $787.
What is the cheapest airline that flies from Lambert-St Louis to Idaho Falls Fanning Field?
United Airlines and Delta are the most popular carriers operating from Lambert-St Louis to Idaho Falls Fanning Field
What airlines fly to Idaho Falls?
Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Idaho Falls from St. Louis according to our data. Delta is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Idaho Falls. Keep in mind that there are 3 different airlines that fly to Idaho Falls on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Idaho Falls
Cheap St. Louis to Idaho Falls (STL to IDA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Idaho Falls
How far is Lambert-St Louis to Idaho Falls Fanning Field by plane?
The straight-line distance from Lambert-St Louis to Idaho Falls Fanning Field is 1181.2 mi. 5h 14m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?
Prices for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?
The number of operators available for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport is 3 as of April 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport.
What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?
The travel and health documents required for your trip to Idaho Falls Fanning Field Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Idaho Falls Fanning Field Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Idaho Falls?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Idaho Falls is United Airlines, representing 50% of all bookings. The subsequent popular airlines are Delta at 34% and American Airlines at 17%.
Best airlines flying from St. Louis to Idaho Falls
Compare and see reviews for airlines that fly from St. Louis to Idaho Falls with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $305 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $314 | Free Cancellation | Rating 8.0 7,934 reviews | |||
| PriceFrom $464 | Free Cancellation | Rating 7.4 8,696 reviews |
Traveling to a place near Idaho Falls?
Book flights to Idaho Falls if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Idaho Falls?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Idaho Falls. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Idaho Falls with flexible booking policies on momondo?
momondo does allow users to show only those flights to Idaho Falls from St. Louis which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from St. Louis to Idaho Falls?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Idaho Falls.
I’m not ready to book a flight from St. Louis to Idaho Falls right now. Can momondo alert me if prices change?
Yes. momondo can track prices for St. Louis to Idaho Falls flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.