Hi
A little help from vetrans would be much appreciated
Tonights flight from IAD to EZE is delayed from 9:30 tonight until 10:30 tomorrow morning. We went to the airport and they won't begin check-in until tomorrow morning, which makes me nervious that they may ultimately cancel the flight entirely.
In a call to United and talking to the agents at Dulles (who have been very very helpful and very nice despite tonights chaos at Dulles), yet they don't have much information.
Having lost a day of vacation already (arrivial moved from 10am to 10pm) I would like to begin to try to organize the balance of my trip.

Does the delayed check in (and unwillingness to take or check the baggage) suggest that they think the flight will ultimately be cancelled?And if it is cancelled, what can I expect re-booking a very cheap ticket?

Thanks