USING matrix.itasoftware.com to search for Companion tickets for Coach or F.

It's a simple matrix search where the Fare Classes are entered in the right side field on the 2nd and 4th lines of the search. Click on Advanced controls to show these additional lines.
The full entry of the field for Coach Fare Classes is: F BC=L|BC=U|BC=T|BC=X|BC=V
The full entry for the field for First Fare Classes is: F BC=I|BC=Z and if you want to include C+ use F BC=I|BC=Z|BC=W

The following example is DTW-LAS-DTW for 6 or 7 days


This search yielded the following results:


Clicking on the fare will open a window showing all available fight combinations.

Have fun searching!