Hello,
I finally found their number but they do not give their country code. Anybody knows how to call them?

BonairExpress/Dutch Antilles Express NV
Plasa Medardo SV Thielman Off 121
P.O. Box 163
Kralendijk, Bonaire N.A.
Phone: +599 717 3471
Fax: +599 717 3472

Natalya, the search engine at the bottom of this page came up with a lot of hits when I put in "county code" with the quotes...

Here is what I found..
From the states, you have to dial 011 599 and the local number

Thanks I will try it now.

Wow, those people are expensive. It's $230 pp r/t. Is that normal?

Yes it is. We paid about the same earlier this year.

$230.00 is better than swimming!

Pay it, Bonaire is worth it! Plus, if you wait too long.... there might not be seats available

Thanks so much everybody. I got the tickets from AUA to Bonaire. They were $203 r/t plus $6+21 airport taxes. It was a goo deal.
See you on Bonaire.

FYI, anybody 60 or older can get a small (I think 5%) senior discount on BonairExpress tickets.
Also, you do not have to pay departure tax in Aruba if you stay on Aruba less than 24 hours. This means you pay no departure tax going from Aruba to Bonaire and only the small Aruba departure tax going from Bonaire to the US via Aruba. If anybody tries to charge you on Aruba, show them your passport stamp or your boarding pass from your previous flight.
Enjoy Bonaire!!!