Continental's electronic timetable for PDAs shows one daily roundtrip flight between Miami and Havana (CO 4919 outbound and 4918 on the return). It's operated by 733 equipment. CO's Web site doesn't reveal any alliance carrier operating the 4900 series of flights (the most likely, COPA, is in the 9000 series), nor does it provide any dep/arr info for CO4919 or CO4918, nor does the desktop version of the electronic timetable show any service between MIA and HAV.
My question: Does CO operate to Cuba? I know that, under the US trade embargo, it legally can't, but it's not uncommon for some companies to get relief and/or exception from political embargoes in special circumstances.
Moreover, a pic from Airliners.net (I don't have it handy...sorry) depicts a Continental 737-300 parked at Havana at night. More info would be great.