Some of these hit-or-miss opportunities aren't available until check-in. They also vary by location and can change with the season.

Some Hilton Hotels offer standby upgrades to a suite or a room with better view starting at $30 more a night, based on availability when you get there. You put in for the deals through Request Upon Arrival, which also lets guests customize their hotel stays before check-in by ordering extra amenities or snacks online at hilton.com.

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