If you prefer to plan ahead, Spirit's deal is worth a look. Travel on domestic and international routes is valid through mid-December.
American's deal features a wide variety of cities in Latin America, including Costa Rica, Nicaragua, Argentina, and Peru. Book tickets by March 28.
Flights to Amsterdam, Dublin, and London are featured in Lufthansa's new deal. Book tickets by April 8.
Up to $50 Off: Monthly Car Rentals in Major Cities with Hertz
