Delta’s Economy Comfort seating has been expanded to include all two-class flights as well as the current long-haul international flights. Complimentary access to Economy Comfort seats is available for all SkyMiles Diamond and Platinum Medallions and full-fare economy passengers for two-class flights within the U.S. and to Canada, Mexico, the Caribbean and Central America. Gold Medallion members will have free access, but not at booking, and Silver Medallions can purchase the seats at a 50 percent discount or can have free access at check-in if any are available.