United has round-trip flights from Austin (AUS) to Grand Cayman (GCM) for $304-$311 with a connection. Flights January to May. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. Extended weekends available. Origin/Destination reversible.
Hopper has a Cyber Monday coupon for -$200 off Cayman Hotels.
United’s “Basic Economy” fares do not allow for 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.
The personal item size on United is smaller (9 x 10 x 17 inches) than Frontier or Spirit (8 x 13 x 18 inches).