Flight disappeared... now what?

My daughter booked round trip flights for herself to come home for Christmas: CAN/MSP on Delta,

Her boyfriend is going to visit her, and wants to join her on the same return flights to CAN (return MSP later), but they have disappeared as an option. (no longer on Delta sight or itamatrix)

I told her to call the airline and ask if the flights are still available.

Any other advice?

Jan 1, Delta flights 1815, 185 and 6358.

thanks

Flights to some international destinations lighten up on the holidays...but this late in the game? I am surprised.

Definitely need to be contacting Delta.

Delta rep told daughter that last flight PVG-CAN was full, so couldn't book boyfriend on same routing. She allowed daughter to change routing thru Detroit instead of Atlanta (no charge) MSP-DTW-PVG-CAN, and boyfriend got same flights.

Airline weirdness:

And now both on that last flight (PVG-CAN) that was supposedly full. :confused:

Nice of Delta to do that without a change fee, assuming that they did it that way.