On Tuesday, Southwest Airlines launched two major flash sales featuring low one-way fares on national and international flights from Houston's William P. Hobby Airport (HOU).

The sale on national one-way flights leaving Hobby applies to flights booked by July 30 for flights between August 25 and December 16. Deals on one-way fares include flights to destinations like New York/LaGuardia (starting at $144), Los Angeles (starting at $169), Las Vegas (starting at $156), Washington, D.C. (starting at $129) and New Orleans (starting at $91), among many others.

If you're looking to travel within Texas, it's time to jump on one-way fares to destinations like Austin (starting at $74), Dallas (starting at $79), San Antonio (starting at $95) and El Paso (starting at $126).

Southwest's sale on international flights leaving Hobby applies to flights booked by July 23 for flights between August 25 and December 16. The three-day sale features reduced one-way fares to a number of destinations in Mexico — including Cancun (starting at $129), Cabo San Lucas (starting at $129), Mexico City (starting at $89), Puerto Vallarta (starting at $129) — as well as flights to Belize City (starting at $107), Liberia, Costa Rica (starting at $155), Montego Bay, Jamaica (starting at $181) and San Jose, Costa Rica (starting at $154).

The Dallas-based airline operates more than 3,600 flights a day and serves 95 destinations across the United States, as well as six other countries.