Air Canada's offer features last-minute flights to Paris and Rome. Departures are valid through late June.
American's Barbados sale features flights through late August. Departures are available from Atlanta, Chicago, Miami, and more cities.
United's latest domestic offer includes Kahului, Las Vegas, New York, and San Francisco. Book tickets by Wednesday, June 25.
Delta's new deal competes with AirTran and American's sales. Atlanta, New York, Las Vegas, and Orlando are featured.
Spirit is offering $48 off round-trip flights from early September through mid-November. The discount expires Friday at 11:59 p.m. ET.
