CO uses the ID90T flight listing tool, list through that. Just in case you haven‘t heard, Continental will fade into the sunset this weekend. United and Continental’s websites will go dark 2a.m. EST Saturday with the fully integrated United site (assuming all goes as planned) coming back on-line 6a.m. Saturday
It is my understanding that United is embargoing buddy/companion travel from Saturday March 3 - Monday March 5th.
--hopefully someone from United/ CO will comment.