Very disappointed with Air Plus. Flying back from Barcelona to Boston on Delta via JFK leaving Barcelona at 12:15PM arriving in Boston at 7:38PM. Delta changed Barcelona departure to 9:15AM but Boston arrival same so have five hours to kill in JFK. Found that Delta has an earlier flight that would arrive in Boston at 5:07PM. When I asked for earlier flight I was told that it could not be booked because it was not included in Viking’s contract with Delta. So as far as I’m concerned there is no “Plus” in the Air Plus!! Save the extra cost and use it for transportation between ship and airport!