Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 128% on the overall cost on flights from Casper to St Louis.
To save up to 96% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Casper to St Louis from $374 1-2 weeks out and tickets from $553 for flights departing within the next 72 hours.
Our data shows that August tends to be the cheapest month to fly to St Louis from Casper. Users have commonly found prices around $266 for the month, but tickets can be as low as $158. Due to multiple factors, prepare for potentially higher prices in December.
One of the essential ways to save on airfare from Casper to St Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 12% on airfare.