Cheap Southwest Airlines flights Harlingen (HRL) to Del Rio (DRT)

Scoring cheap one-way Southwest Airlines flights from HRL to DRT on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares for your next exciting adventure.**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.

Southwest Airlines flights to Del Rio tend to be cheaper in the low-season months of October and September. Whether you’re after a one-way or a return ticket, you could land a better deal then.

Start searching one to three months ahead of your departure date to find cheaper fares on Southwest Airlines flights from Valley Intl. Airport (HRL) to Del Rio Intl. Airport (DRT). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, 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 see if there’s a direct journey from HRL to DRT with Southwest Airlines or other airlines, use our “Nonstop” filter when searching for flights.

To find the earliest departure from HRL to DRT with Southwest Airlines, sort your results by “Early Morning” and “Morning.” Choosing an early flight usually means you’re less likely to experience 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.

Del Rio Intl. Airport (DRT) is the primary Del Rio hub for Southwest Airlines flights from Valley Intl. Airport (HRL).

Depending on your ticket type, a fee is typically charged if you modify or cancel your booking more than 24 hours after confirmation. To find flexible fares, select our “Changes included” or “No cancel fee” filter when searching for flights. To learn more about changing or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”