Aeromexico has round-trip flights from Houston (IAH) to Ciudad del Carmen (CME) for $199-$233 with a connection. Flights August to December. Very few weekends available. Origin/Destination reversible.
Some small OTAs on Skyscanner have this for cheaper than the airline ($199). If you plan on booking there, beware of any site that charges a fee to cancel a ticket within the 24-hour “free” period. Use unknown booking sites at your own risk.
