the midst of a travel rush partly to blame for another spike in flight cancellations. >> they say the reason the flights were canceled were crew available due to covid. >> reporter: more than 2,000 domestic flights saturday and sunday wiped away on one of the busiest travel stretches of the year. >> jetblue, for example, has canceled 10% of their flights. that's a huge amount of inconvenienced people. that's what i would call a meltdown. >> reporter: it doesn't soften the blow for many. >> it's kind of difficult. there's been delays in the lines as well as in the flights. pretty much just regular christmas flying. >> how worried are you about traveling with covid spreading like wildfire right now? >> it is a concern. >> reporter: as airports were packed, so were testing lines, the demand in overdrive with people wanting to see loved ones. >> things will get better.