I didn't see any posts about this yet, but I'm seeing lots of great prices from YUL to TLV, from March into early June. Many are sub-$800 via BRU, ZRH, AMS, YYZ, FRA, MUC and maybe other points.
The cheapest ones are via LHR on BA for under $700 RT--for this I see availability mostly in April but also a little bit in May as well. Seems to be minimum 1 week stay and mostly on Monday-Thursday. Caveat is an overnight layover in LHR on the way there.
I'd love to take advantage of this myself but there is no direct flight from where I live to YUL.