Cheap flights from St. Louis to Puerto Rico from $109

If you don’t want to visit Puerto Rico in April, then you should wait until October to fly from St. Louis, when ticket prices are also cheap, with an average price of $336.

Fly from Lambert-St Louis to San Juan Luis Munoz Marin Intl for the best Lambert-St Louis - Puerto Rico flight prices

You are more likely to see cheaper flights to Puerto Rico from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $427 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from St. Louis for as low as $350 on momondo.

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

Delta, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Puerto Rico

American Airlines, Southwest and Frontier are the top three most popular airlines that fly to Puerto Rico from St. Louis according to our data. American Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Puerto Rico. Keep in mind that there are 5 different airlines that fly to Puerto Rico on a routine basis, so you have a few additional options to choose from.

Historically, on average around 30% of flights between St. Louis and Puerto Rico have experienced a delay on any given week. The average delay length over the past 12 months has been 93 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 30% of their flights experiencing any sort of delay.