Flights under $50 😵 At least nine cities across the U.S. are at Houston’s fingertips with one-way flights for less than $50 in January. With some fares as low as $20, you can swap your lunch money for a one-way ticket to either side of the U.S. coast to start the new year. Click the link in our bio to see the best times to book. #houston #flights #spiritairlines #frontierairlines