We have a flight in the next 24 hours and I have been trying to check us in online. I get an error message saying: "Your flight is currently unavailable for online check-in." There is a link below the error message that says "View details." When I click on that it says, "Online check-in is not open for this flight. Online check-in opens 48 hours to 90 minutes prior to departure, and 24 hours prior to departure for flights to or from the United States." It is currently exactly 23 hours and 33 minutes prior to departure. Why would online checkin not be open? The flight is somewhat empty but not entirely. Now I'm worried they're going to cancel our flight. Has anyone else had this experience?