Fly from San Francisco to Havana, Cuba for only $330 roundtrip with Aeromexico.
Please note, US citizens must meet one of 12 criteria to be permitted to visit Cuba (e.g. visiting family; journalistic purposes).
More info here.
DEPART:
San Francisco, USA
ARRIVE:
Havana, Cuba
RETURN:
San Francisco, USA
DATES:
Availability from April to September 2017 (excluding summer)