>> reporter: delta, united, and american have seen a more manageable 2% to 5% of flights canceled sunday but it doesn't soften the blow for many. >> kind of difficult. there's been delays in the lines as well as the flights. pretty much regular christmas flying. >> reporter: how worried are you about traveling with covid spreading like a wildfire? >> it is a concern. >> reporter: as airports are packed so are testing lines. the demand in over drive for those seeing loved ones. >> we've obviously got to do better. i think things will improve greatly as we get into january but that doesn't help us today and tomorrow. >> reporter: from family gatherings to football fields there's massive spread. the fenway and military bowls the latest college football games to go dark after boston college had 40 players unavailable due to covid, injuries, and opt outs. the daily seven-day average fueled by omicron now sits around 200,000 infections a day. dr. jeremy faust in boston identified