United has round-trip flights from Houston (IAH) to Mexico City (MEX) for $226, NONSTOP. Flights March to June. Weekends available. Origin/Destination reversible.
A negative COVID test result is required for re-entry.
Change fees are waived, but United’s “Basic Economy” fares do not include a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding.