I feel for the students, but reopening the school for in-person classes makes no sense.
If a student flies home, they face one day of risk. If school reopens for in-person classes, then they'll face hundreds of days of risk.
That single day of flying may not even be as risky as a single day of classes (never mind hundreds of days of classes), because not nearly as many people fly these days due to fear of the pandemic.
Also, if classes reopen, many of the people that get sick (who'll be far more numerous than those that get sick from flying a single day) will spread the sickness to others, causing way more knock-on effects than those caused by a small number of students flying one day.
If a student flies home, they face one day of risk. If school reopens for in-person classes, then they'll face hundreds of days of risk.
That single day of flying may not even be as risky as a single day of classes (never mind hundreds of days of classes), because not nearly as many people fly these days due to fear of the pandemic.
Also, if classes reopen, many of the people that get sick (who'll be far more numerous than those that get sick from flying a single day) will spread the sickness to others, causing way more knock-on effects than those caused by a small number of students flying one day.