Travelers who fly round trip on Swissair from New York, Boston or Chicago to Austria, France, West Germany, Italy or Switzerland through Dec. 15 are eligible for a free Kemwell rental car for one week.

The offer applies to two passengers traveling together and is good for a subcompact like a Fiat Panda. Departures must be Sunday through Thursday and return travel must be Monday through Friday. Information: 800-678-0678.