Currently, April is the cheapest month in which you can book a flight from St. Augustine to Harlingen, Texas (average of $267). Flying from St. Augustine to Harlingen, Texas in June is currently the most expensive (average of $390). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
When flying from St. Augustine to Harlingen, Texas, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 47% versus a flight at noon.