Travel from Charleroi to Antwerp in July

Need a date, or at least day of the week, to provide accurate information. Also
details like where you are coming from (if immigration applies), plane or train,
checked bags or carry-on, etc. All those details matter as to when you actually
get out of the airport and can access ground transportation.

Trains have different schedules on weekends, and buses run different schedules
on different days of the week sometimes. Seems a bit too far for a metered taxi.

If you want a private transfer, have a go at findtransfers.com.

I recently flew into Charleroi; you must be flying Ryanair.

You would have to take the Flibco Bus (outside the Charleroi Airport) to Brussels Midi Train Station and then take the train to Antwerp. The buses run around the clock and there are plenty of trains from Brussels Midi going to Antwerp.

We arrive on Sunday Via Ryan Air from UK . We will be checking bags. Thank You

Once you know the flight is on time you can book the bus from Charleroi to Brussels Midi
https://www.flibco.com/en

And then the train from Brussels Midi to Antwerp
https://www.belgiantrain.be/en

This is the least expensive way.

Least expensive is probably the combined bus+train offer from the railways:

https://www.belgiantrain.be/en/tickets-and-railcards/charleroi-airport-ticket

You can take a bus every half hour to Lutre, where you can board a train all the way to Antwerpen.