Have done that a few times, saving £ 4 figures. Flights for 4 including hold luggage have risen exponentially, especially as the airlines are seeking to rake in huge revenues to mitigate pandemic losses.
I've always done the same eg Questor.
Then not falling for coercion when collecting the car, the excess insurance is more than enough.
One of their scare tactics is to take a chunky hold against your credit card.