Tuesday is generally a great day to depart. Flying on this day could help you save up to 106%.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, March can be a great choice for travel to Harlingen. Flights to Harlingen from Sioux Falls in March are about $286 on average during March, but can be found for as low as $128.
Unlike in the morning, when flights are generally more expensive, you can save up to 44% on flights from Sioux Falls to Harlingen by exploring options for tickets at noon.