Cheap flights from Utah to St. Louis from $79

In general, June is the cheapest month to fly from Utah to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $398. The month of May is another great option to travel to St. Louis, with average flight prices from Utah averaging around $399.

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $439. 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 $537. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

Flying to St. Louis from Utah in the evening is the least expensive time of day to depart. momondo users have found prices as low as $419 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 $639 per ticket.

Fly from Salt Lake City to Lambert-St Louis for the best Utah - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from Utah when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Utah for as low as $343 on momondo.

There are 2 cabin classes available to choose from on Utah to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, United Airlines, and Southwest are the most popular carriers operating from Utah to Lambert-St Louis

Delta, Frontier and Southwest are the top three most popular airlines that fly to St. Louis from Utah according to our data. Delta is the first choice among our users, with 61% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

As of March 2026, there are 4 flights per day flying from Utah to St. Louis. The most common time of day flights depart is 8:00PM, with 41% of flights taking off in the evening.

28 flights are operational weekly from Utah to St. Louis as of March 2026. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.