If you're willing to take a second flight to your final destination, maybe the beaches of Thailand or Malaysia (assuming Coronavirus isn't still an issue then). There are flights available to Kuala Lumpur and Singapore then, and regional flights are usually very cheap plus they are also worth visiting for a few days. Or, you could look at Cancun with flights to Mexico City and then a connection (or flights to the southern US). There is also quite a lot of availability to Miami at that point next year - you could do the Keys, Florida beaches, or hop on a flight to the Caribbean or Cancun. And finally, how about the UAE or Oman?