DL: SJC-SJU from $279 ai (9,146 MQM, 3.05 cpm)
 

Searchable on Google Flights
Overnight turns available (i.e. Fri Sept 25-Sat Sept 26)
Departures found between September 15-29

The lowest MQM cpm I can find on a quick search is SJC-LAX-JFK-SJU-JFK-LAX-SJC for 9,146 MQMs (3.05 cpm)

On DL medal. Books DL stock, V fares

Fingers crossed for UA match?

Although I bet if UA matches it'll be from SEA, not SJC/SFO. Sigh.

We can certainly hope!

Can anyone still find this fare online? Not working for me on delta.com.

Still not too bad for a few dates in Dec. @ $317. Clicks through to 9144 MQM on dl.com, ~3.5 cpm. Also a few itineraries SJC-MSP-JFK-SJU on the outbound, 8773 MQM. Continues into 2016. Same-day/overnight turns, longer trips possible too?

If I'm based in MSP, any advice on the best way to take advantage of this?

Might be looking to do this twice; aiming to add ~17000 MQM by Dec 31.

+1

I am also looking

Thanks on that updated tip. Saw this thread the other day and booked a 3-4 May SMF-SJU run. ($331 8683 MQM)
SMF>LAX>JFK>SJU 1 hour turnaround SJU>JFK>SLC>SMF

Seeing this again on ITA at the $31x price point for April/early May, SJC-LAX-JFK-SJU-JFK-LAX-SJC 9144 MQMs @3.4 cpm

Examples: 4/11 or 4/12 departure with overnight turn. Variations may be possible from SFO/SMF, weekend, and 0-2 day trips but may involve dropping the LAX connection and/or going through MSP instead for reduced MQMs, play around with the advanced routing codes...

$308 from SMF a few Tues/Weds in Jan/Feb ~3.4cpm depending on exact routing.