A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to St. Augustine in the evening. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight in the afternoon.
Travelers seeking maximum savings on their Washington, D.C. to St. Augustine flight should consider departing on Sunday afternoons when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.