Cheap flights from Rhode Island to St. Louis from $104

In general, August is the cheapest month to fly from Rhode Island to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $381. The month of January is another great option to travel to St. Louis, with average flight prices from Rhode Island averaging around $381.

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $438. 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 $546. 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 Rhode Island in the evening is the least expensive time of day to depart. momondo users have found prices as low as $426 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 $469 per ticket.

Fly from Providence-TFGreen to Lambert-St Louis for the best Rhode Island - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from Rhode Island when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $480 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Rhode Island for as low as $402 on momondo.

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

Southwest, United Airlines, and Delta are the most popular carriers operating from Rhode Island to Lambert-St Louis

American Airlines, Southwest and Delta are the top three most popular airlines that fly to St. Louis from Rhode Island according to our data. American Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 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 Rhode Island and St. Louis is 6 per day as of July 2026. The most frequent departure time is 12:00PM, with 100% of daily flights leaving in the afternoon.

As of July 2026, 44 flights take off from Rhode Island and land in St. Louis each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.