Cheap flights from St. Louis to Salt Lake City from $63

In general, September is the cheapest month to fly from St. Louis to Salt Lake City. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $399. If you are unable to visit Salt Lake City during the month of September, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around $408.

On average, the least expensive day to fly to Salt Lake City from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $402. However, this price may fluctuate depending on the airline, the season, and holidays. 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 Salt Lake City on Monday is $485.

Our most recent data shows that the best time of day to fly to Salt Lake City is in the evening. Flights from St. Louis to Salt Lake City during this time can be as low as $358. In the morning is when there is more demand to fly to Salt Lake City, so prices are often more expensive at around $491 per ticket.

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

You are more likely to see cheaper flights to Salt Lake City from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Salt Lake City for around $442 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Salt Lake City from St. Louis for as low as $393 on momondo.

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Lambert-St Louis to Salt Lake City

Delta, Frontier and Southwest are the top three most popular airlines that fly to Salt Lake City from St. Louis according to our data. Delta is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Salt Lake City. Keep in mind that there are 5 different airlines that fly to Salt Lake City on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 88% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $318.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 5h 50m.

Dallas (DFW) has the shortest average layover time for this route: 1h 12m.

As of May 2026, 3 flights take off from St. Louis and land in Salt Lake City each day. The most common flight departure time for this route is 7:00AM, with 41% of daily flights taking off at noon.

The number of flights available between St. Louis and Salt Lake City is 25 per week as of May 2026. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.