with covid-related staffing issues, crippling air travel all week. some 7,000 flights canceled since christmas eve, more than 900 today. at the u.s. airlines, 90% or more of employees at the largest carriers are vaccinated. but omicron has shown it s elusive and it s random. reporter: seattle s airport had the most canceled flights in the world for the second day in a row. that s the main hub for alaska airlines. tonight, they re warning customers of 20-hour wait times on the phone, urging flyers with nonessential travel scheduled before january 2nd, 2022, to consider changing their travel to a later date. and there are already more than 500 flights canceled here in the u.s. for tomorrow, so, definitely not good news, seeing as about 12.5 million people are expected to fly from now through january 3rd. whit? this mess continues. mireya, thank you.