To save up to 10% on this flight, we recommend booking at least 56 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St Louis to USA from $302 1-2 weeks out and tickets from $331 for flights departing within the next 72 hours.
February can be a great time to fly to USA from St Louis with a flight ticket averaging about $296. Cheapflights users have found deals in the month of February for as cheap as $139. The most expensive prices can be found in the month of July.