Southwest Airlines offers select 1-way fares with prices starting at $57.50. (Click on "Southwest Airlines" in the headline to see this sale; all taxes are included.) That ties last week's mention as the fourth-best rate we've seen from Southwest in the past 12 months. It's also a current low for select routes by $51. This price is valid on flights departing from Houston, TX, (HOU) to Corpus Christi, TX, (CRP) on June 4; prices vary depending on the departure cities and dates chosen. Blackout dates may apply. Book this travel deal by May 8 for travel through June 7. Other notable fares: