Southwest has round-trip flights from Houston (HOU) to Chicago, Atlanta, Fort Lauderdale, Baltimore, Denver or San Diego (MDW, ATL, FLL, BWI, DEN, SAN) for $98-$108, NONSTOP. $49-$54 each-way. Flights February to May. Origin/Destination reversible. No Holidays. Mostly mid-week/weekdays. No weekends found for San Diego. Depending on dates/destination, the flight may operate as a Red-Eye.
Note: Best availability seems to be between Apr 15th and May 19th.
Note: United, Spirit, and Frontier may have fee encumbered “Basic Economy” fares available for a bit less. Keep in mind that those “cheaper” fares are often more expensive once you factor in bag fees.
Note: You may find additional savings if you book your Flight+Hotel together as a package on Southwest Vacations. Before you commit, always compare the prices of the individual Flights and Hotel with other hotel booking sites like Tripadvisor or Expedia.
Note: Southwest doesn’t charge a change-fee, so if you already booked this flight, but paid more, you should be able to re-book at the lower price and get the difference paid back to you in the form of a travel-voucher.