we had super cheap flights booked for the summer of the 1st lockdown, under 400 quid to Orlando ( we normally are happy to pay £650 - £700 ) cancelled the 1st lot and got out money back, booked for last year, still decent prices at under £500, couldn't get our money back so got credit, used that credit towards this years flights at just over £800 ish
but its a 1st world issue, so we are ok with that ( they are now £1500 each )
America could help the airline situation ( for US flights ) by binning the testing before you fly
BUT, a few decent deals to be had with the charter airlines like TUI, yesterday they had MAN to MCO for £220 return going this week and next, I guess they are just filling empty seats