From the Netherlands there are 17 weekly flights to Curacao and 6 flights to Bonaire. Travel time is about 9 hours.
In addition, it is possible to fly from Curacao to Bonaire several times a day in about 15 minutes.
The flights are performed by the 3 Dutch Airlines mentioned below.
You can check flights and fares per airline.

Fly with KLM

Fly with Arke Fly