Short and sweet. Or, in some cases, short and bitter. But in any case, short.

• Back in June, US Airways started service from Charlotte to the resorts of Cabo and Puerto Vallarta on Mexico’s Pacific coast. How’s that working out? Apparently not so well. Both started out as four days a week but look to be down to Saturday-only come March. And March is not exactly the off season for vacationing in Mexico.

• Daily nonstop flights to Sao Paolo, Brazil, were suppose to begin as soon as January. Still no sign of the route on US Airway’s web site though. Rumor is that the start date has slipped to the fall.

• That was fast: A month ago, we mentioned that Delta was ending service to Florence, SC and Lynchburg, VA, leaving both cities with flights to CLT as their only scheduled air service. US Airways has responded to Delta’s departure by adding an extra (in both cases, sixth daily) flight to both destinations come January.

• US Airways looks to be at about 625 flights a day from CLT in December (sample date: Thursday, December 16). That’s up about 40 flights a day as compared to last December. Mainline is up seven flights a day while 70 to 86 seat regional jets are up eight flights a day. The big gain though is in 50-seat regional jets, which are up 26 flights day as compared to last December. Turboprops are down a flight a day.

• The additional flights mainly involved additional service to existing destinations. US Airways added year-round service to Melbourne, FL, Baton Rouge, LA, and Ottawa, Canada in 2010 but that only accounts for seven of the 40 additional flights a day. US Airways also began service from Charlotte to Rome this past summer but the flight does not operate every day during the winter.

• US Airways has extended its slot squating at LaGuardia. Recall that LGA is capacity constrained, that the slots to fly there are use-it-or-lose-it, and US Airways wants to trade most of its slots at LGA to Delta for slots at Reagan National. The feds have said OK, but only if Delta and US Airways sell off some of their respective slot holdings at the two airports. US Airways and Delta don’t want to do that, and keep hoping that either the DOT changes its mind or the courts rule in their favor. But for now, US Airways has to do something with those LGA slots. To keep them in use, it’s increased CLT-LGA to up to 15 flights a day — but with the extra up to six flights a day being on 50 seat regional jets instead of the larger mainline equipment that it has almost exclusively used on CLT-LGA for years. Oh, and it’s also flying Philadelphia – LaGuardia 20 times a day, mainly on 37-seat turboprops…

• JetBlue will not be bringing back its Charlotte-Ft. Lauderdale flight this winter. The airline continues to fly to Boston and New York City’s John F. Kennedy International Airport from the CLT.

• And speaking of JetBlue, could they please bringing their pdf timetable back?