tried finding SNA (AC codeshare on CO) EWR (AC) YYZ (AC+) YVR (AC+) YYZ (AC) EWR (AC codeshare on CO) SNA on ITA.
any idea?
That's where I found the original itinerary! Try:
SNA::AC+ EWR AC+ YYZ AC+
YVR::AC+ YYZ AC+ EWR AC+
Search all of August, with a 1 night stay. You may not be able to go via EWR both ways.
From YVR, the reverse itinerary is even cheaper. Several dates come in around $300 r/t, with itineraries such as YVR-YYZ-SNA-EWR-YUL-YYZ-YVR possible with immediate turn in SNA. Why you would do this to yourself is another matter....
^