There are some airlines that allow you to easily search award availability on partners such as United, American, ANA, Qantas…………….but sometimes not all partners can be searched, especially partners that are not in the airline’s main alliance. A good example of this is Air Tahiti Nui. You can book their flights with AA miles but you can’t see their availability on AA’s website or any other One World partner’s website since they aren’t a member of One World. In some cases you can use Flightstats to see award availability. On the Flights tab, click on “Availability”.
For this example, business class is not available (I = 0) but there are 7 seats in economy (W = 7).