$105 Cheap Southwest Airlines flights Raleigh (RDU) to Harlingen (HRL)

Apply the “Price (lowest to highest)” filter on Expedia to search for cheap Southwest Airlines return flights from $239 from RDU to HRL. Affordable one-way fares from $105 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to get away to Harlingen with Southwest Airlines. You could also find excellent prices on one-way and return fares in September.

Begin your search one to three months before your departure to find cheap fares on Southwest Airlines flights from Raleigh - Durham Intl. Airport (RDU) to Valley Intl. Airport (HRL). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct journey from RDU to HRL with Southwest Airlines or any other airlines, use our “Nonstop” filter when looking for tickets.

Search Southwest Airlines’s earliest flights from RDU to HRL by checking the “Early Morning” and “Morning” filters. Not only will you arrive sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Valley Intl. Airport (HRL) is the main Harlingen hub for Southwest Airlines flights from Raleigh - Durham Intl. Airport (RDU).

Changes are usually free within 24 hours of booking, but your airline may charge you after that. For further information about modifying your flights, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to make changes without additional costs, check the “No cancel fee” or “Changes included” filter when planning your next trip.