DoubleTree by Hilton Seattle Airport features a nightclub, an outdoor pool, and a 24-hour gym. If you drive, self parking is USD 32 per night, or you can take advantage of the free airport shuttle (available 24 hours). The front desk has multilingual staff on hand 24/7 to help with securing valuables, luggage storage, and tours or tickets. Additional amenities include free WiFi in public areas, a spa tub, and conference space.