There are plenty of taxis at both airports so you can always pick one up from the rank & it isn't always necessary to book beforehand.

For 2020- Due to Covid-19 situation there is a limit to how many passengers a taxi or any private vehicle can have in total in the car.
The rule is: the driver & 2 additional passengers; driver & his/her children (regardless of the total number of children). We await updates for how 2021 summer regulations, if any.