Most areas separate departures and arrivals into separate corridors. Departures and arrivals levels each have separate street approaches. The terminal used to serve as the international departures and arrivals zone. ONT currently has more than 64 daily departures and arrivals. It consists of one single building for arrivals and departures. Alaska Airlines services the airport year round, operating upwards of 11 daily departures. Five arrival counters and 12 departures counters were also constructed. It had two platforms, one each for departures and arrival. It is the 15th busiest airport in the world in terms of aircraft departures. Many other vessels canceled or postponed their departures. The number of peak-day scheduled aircraft departures for December 2018 was 170. As well, 30 ship departures from San Juan were being canceled. Some international departures operate at TBIT. There are three lounges in the departures lounge. As in 2010 the number of tourist departures abroad was 7,464,200.