是，新闻说是因为疫情导致。

Some 7,500 flights have been grounded and tens of thousands more delayed from Friday through Sunday -- one of the busiest travel periods of the year -- with multiple airlines acknowledging that rising cases of Omicron have prompted staffing shortages.

所有跟帖： 

• 隔离现在缩短到7天了，希望这种shortage可以缓解，不过一时半会难 -一笑拉- ♀ (0 bytes) () 12/26/2021 postreply 11:01:55

• 其实我觉得，如果疫情导致，大家就忍受一下，预期行程会有不顺利。 -遥遥- ♀ (158 bytes) () 12/26/2021 postreply 11:07:41