JetBlue Airways will add new service this winter to two more island destinations: St. Maarten in the Netherlands Antilles and Puerto Plata in the Dominican Republic.

US Airways is going to further reduce its service in Pittsburgh, where the airline said it has lost more than $40 million over the past 12 months alone.

Southwest was the best on-time performer among the major U.S. carriers in another poor on-time month for the U.S. airline industry as a whole, as, mercifully for air travelers, their summer of inconvenience and discontent came to an end.

WestJet announced the introduction of new seasonal nonstop service from Toronto to St. Lucia, beginning December 16. WestJet’s enhanced winter schedule also includes new nonstop flights from Hamilton to Nassau, Fort Lauderdale, Orlando and Tampa.

GOL, parent company of Brazil’s low-cost airlines GOL Transportes Aereos S.A., and VRG, which operates the Varig brand, have begun selling tickets for VRG’s newest route, Rio de Janeiro-Sao Paulo-London. The flights will start October 28.

JetBlue Airways said its traffic in September increased 11.8 percent from September 2006 on a capacity increase of 13.7 percent. Load factor for September 2007 was 71.4 percent, a decrease of 1.2 points from September 2006.