Cheap flights from Wisconsin to St. Louis from $119

In general, December is the cheapest month to fly from Wisconsin to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $288. The month of March is another great option to travel to St. Louis, with average flight prices from Wisconsin averaging around $308.

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $365. 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 Sunday because tickets tend to average around $516. 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 Wisconsin at noon is the least expensive time of day to depart. momondo users have found prices as low as $331 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 $439 per ticket.

Fly from Milwaukee-Mitchell to Lambert-St Louis for the best Wisconsin - Lambert-St Louis flight prices

There is only 1 cabin class available to choose from on Wisconsin to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 29% on your flight if you consider stops on a Wisconsin to St. Louis flight.

Delta, Southwest, and Frontier are the most popular carriers operating from Wisconsin to Lambert-St Louis

United Airlines, Southwest and Delta are the top three most popular airlines that fly to St. Louis from Wisconsin according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

As of October 2026, 4 flights take off from Wisconsin and land in St. Louis each week. The most common flight departure day for this route is Mon, with 50% of weekly flights taking off on this day.

Flight times from Wisconsin to St. Louis vary, but if you’re flying out of Milwaukee and flying into St. Louis (one of the most popular routes), then the duration is 1h 15m on average. Another popular route from Wisconsin to St. Louis is flying from Madison to St. Louis, which will take roughly 3h 30m. Keep in mind that layovers or delays could extend your travel time.