The airport terminal itself is open 24/7 but the airline counters close between 6:30pm and 8:30 pm depending on the last departure time of the day. Alaska is the first to reopen at 3:30 am and United/ Delta a little before 4:00am. The car rental counters open about 6:00 am and close about midnight.
Prettu much all day into night u can call or look on line it tells you
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