Right now there are no direct flights from the U.S. to Zagreb.
The duration of the flight depends on your departure airport. Here are some examples:
The durations indicated correspond to the shortest flights found on these routes.
The main airlines that operate flights between the U.S. and Zagreb are American Airlines, KLM, Air Canada and Frontier Airlines.
The cheapest departure airport on average is: Lambert-St. Louis International Airport.
Comparison among airports in the U.S.
Renting a car in Zagreb costs on average:
Air France
Croatia Airlines
Eurowings
KLM
Lufthansa
Ryanair