Originally Posted by
sbm12
They can be booked by corporate TAs, but not in the other online travel sites (Expedia, Orbitz, etc.).
Not true - they started showing up on Travelocity last year, and I'm pretty sure on Expedia and Orbitz fairly recently. However, you can't buy a ticket with both B6 and another airline, as you can do with much of the other airlines (eg. a DL leg and UA leg on one ticket).