U.S. airline JetBlue will add a second charter flight from New York’s John F. Kennedy airport to Havana, expanding charter service ahead of an expected opening of commercial air travel between the two countries, the company said on Monday. The new round-trip, non-stop flight will operate every Tuesday starting Dec. 1 in partnership with Cuba Travel Services, a travel provider licensed by the U.S. government to arrange flights to Cuba. The two companies currently operate one of two other JFK-to-Havana charter flights.