Southwest has round-trip flights from Houston (HOU) to Baltimore (BWI) for $80, NONSTOP. $40 each-way. Flights are mostly on TUE/WED/SAT, December to February. Origin/Destination reversible.
Note: We’re seeing United and AA flights matching with inferior “Basic Economy” fares. We don’t consider those to be worthwhile unless you can get around the added fees and restrictions.
Note: You can save between $50-$150 if you purchase your Flight+Hotel together as a package on Southwest Vacations and apply the ‘TRAVEL150’ coupon code. Coupon expires 11/13/17.