And while you might have had a business class seat, and might have paid extra for it, the airline will automatically rebook you on their next available flight, which won't be business class since all of those seats have been filled with upgrades before your delayed flight lands. You can complain to the airline about the delay causing you to be downgraded, and after proving it with boarding passes, the cruise line will receive a refund for your downgrade. At that point, you'll need to spend a lot of time trying to get your upgrade fee back from the cruiseline. We're still waiting for 1200 dollars back from a flight booked by Viking on Delta that had a connecting flight with 90 minutes between flights in Atlanta, which was delayed by 60 minutes before arriving, and another 15 minutes at the gate.We were able to make it to the gate for our flight, but they closed the door as soon as we arrived since they had given away our business class sears. The flight was in May, the upgrade money was returned to Viking by Delta in early July, and we're still waiting for the money to be returned to us.