Cheap flights from St. Louis to Idaho from $144
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 departing on 7/2. 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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How to get the cheapest flight ticket from St. Louis to Idaho
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?
In general, October is the cheapest month to fly from St. Louis to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $357. If you don’t want to visit Idaho in October, then you should wait until June to fly from St. Louis, when ticket prices are also cheap, with an average price of $366.
What is the cheapest day to depart on your flight to Idaho?
Our data shows that Wednesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $371. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $590.
What is the cheapest time of day to depart on your flight to Idaho?
According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from St. Louis to Idaho at noon for as low as $435. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Idaho, so prices are often more expensive at around $489 per ticket.
How far in advance should I book a flight to Idaho?
You are more likely to see cheaper flights to Idaho from St. Louis when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $412 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from St. Louis for as low as $262 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Idaho?
Delta, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Idaho
What airlines fly to Idaho?
Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Idaho from St. Louis according to our data. Delta is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 4 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Idaho flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Idaho
When did momondo last update prices for flights from Lambert-St Louis Airport to Idaho?
Prices for flights from Lambert-St Louis Airport to Idaho refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Idaho?
There are 5 operators available for flights from Lambert-St Louis Airport to Idaho as of May 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Idaho?
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.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to Idaho
Compare and see reviews for airlines that fly from St. Louis to Idaho with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $239 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 7.4 8,702 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 8.0 7,939 reviews | |||
| PriceFrom $298 | Free Cancellation | Rating 8.0 4,292 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Idaho?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Idaho from St. Louis.
Can I find flights from St. Louis to Idaho with flexible booking policies on momondo?
momondo does allow users to show only those flights to Idaho 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?
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.
I’m not ready to book a flight from St. Louis to Idaho right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Idaho from St. Louis. 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.