Cheap flights from Idaho Falls to St. Louis from $164
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to St. Louis departing on 6/7. 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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Delta flights from Idaho Falls to St. Louis
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United Airlines flights from Idaho Falls to St. Louis
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How to get the cheapest flight ticket from Idaho Falls to St. Louis
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 typical price of a round-trip flight between Idaho Falls and St. Louis?
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $631. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $811. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Idaho Falls in the evening is the least expensive time of day to depart. momondo users have found prices as low as $548 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $704 per ticket.
When to book flights from Idaho Falls to St. Louis
Cheap Idaho Falls to St. Louis (IDA to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to St. Louis
How far is Idaho Falls Fanning Field to Lambert-St Louis by plane?
Lambert-St Louis is 1181.2 mi away from Idaho Falls Fanning Field. Flights usually cover this in 4h 36m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport?
Prices for flights from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport?
The number of operators available for flights from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport is 1 as of May 2025.
How old do you have to be to fly from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Idaho Falls to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Idaho Falls to St. Louis is Delta, representing 100% of all bookings.
Best airlines flying from Idaho Falls to St. Louis
Compare and see reviews for airlines that fly from Idaho Falls to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $406 | Free Cancellation | Rating 8.0 7,934 reviews |
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Idaho Falls to St. Louis?
Finding the right flight to St. Louis from Idaho Falls is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.
Can I find flights from Idaho Falls to St. Louis with flexible booking policies on momondo?
Yes. All flights to St. Louis from Idaho Falls on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Idaho Falls to St. Louis?
momondo helps you find the best flight between Idaho Falls and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Idaho Falls to St. Louis right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to St. Louis from Idaho Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.