Possible reasons why Yapta may indicate that a flight is "sold out" for a flight you're tracking include:

• There are no seats available in the fare class you are tracking. Seats often open up, and prices change, so be sure to check back.
• Flight numbers may have changed on the flight you were tracking. At this time Yapta cannot pick up if there was a flight number change and edit your trip. If this is the case and you want to continue tracking the flight you will need to enter the new flight information.
• If you just started tracking a flight using the tagger, Yapta is out retrieving pricing information for you and will update the price shortly.