O
| Odiyan Events | - | |
| Om Mai Tours and Travels | toep_somrin@yahoo.co.in | www.om-manitours.com.bt |
| Omkara Tours and Travels | omkaratours@druknet.bt/info@omkaratoursandtravels.com | www.omkaratoursandtravels |
| Orgyen Himalayan Expeditions | kelzom1986@hotmail.com | www.ohe.bt |
| Oriental Tours and Travels | orientaltt@gmail.com | www.oriental.bt |
| Owang Travel | owangtravel@gmail.com | www.owangtravel.com |