Cheap flights from Salt Lake City to St. Louis from $74

In general, October is the cheapest month to fly from Salt Lake City to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $400. The month of August is another great option to travel to St. Louis, with average flight prices from Salt Lake City averaging around $405.

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $469. 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 Wednesday 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 Salt Lake City at noon is the least expensive time of day to depart. momondo users have found prices as low as $439 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $519 per ticket.

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

You are more likely to see cheaper flights to St. Louis from Salt Lake City when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $437 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Salt Lake City for as low as $244 on momondo.

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

Delta, Frontier and Southwest are the top three most popular airlines that fly to St. Louis from Salt Lake City according to our data. Delta is the first choice among our users, with 57% 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.

The number of flights available between Salt Lake City and St. Louis is 5 per day as of May 2026. The most frequent departure time is 8:00PM, with 44% of daily flights leaving in the evening.

36 flights are operational weekly from Salt Lake City to St. Louis as of May 2026. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.