After you've selected an itinerary, on the screen where Travelocity displays all the flights in it, there will be "Adult fare rules" under each flight. Click through that which opens up the fare rules, which will have a title "Fare Details for...."

Like this Air Canada example from Travelocity:

Fare details for K14MSLXE
BK CODE

K -

Then about 200 lines of fare rules.

The Fare Code is K for this. You could then determine from the FF rules of your airline whether or not an AC international flight in booking class K would earn the miles you want.

I don't know of any way to tell Travelocity what fare class you want. Yes, you can say Refundable but what I don't think you can do is, for example, to tell it to look for non-refundable fares in W class or higher on United (which are the upgradeable international non-refundable fares.)

Travelocity is actually quite useless for booking anything complicated. It's good for the non-frequent traveler looking for a cheap (not necessarily cheapest) flight.

Even Expedia and Orbitz are better. Expedia is the only one of the three that correctly can put a partner FF# on a reservation - for example putting my United number on an Air Canada flight. Orbitz is the only one of the three which allows specifying up to three preferred airlines instead of just one, and also has a Preferred Alliance search if you don't care which particular three airlines but do want to search all of Star Alliance or Skyteam or oneworld. Also Orbitz is driven underneath by the very competent ITA search engine, so it often finds interesting combinations of airlines to construct cheap fares.

Travelocity has none of those advantages. Clearly the worst of the big three.