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 142% on the overall cost on flights from Casper to St Louis.
To save up to 33% on this flight, we recommend booking at least 61 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 $143 1-2 weeks out and tickets from $179 for flights departing within the next 72 hours.
Our data shows that June tends to be the cheapest month to fly to St Louis from Casper. Users have commonly found prices around $148 for the month, but tickets can be as low as $77. Due to multiple factors, prepare for potentially higher prices in July.
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 37% on airfare.