Same situation. (Deadhead to a LO and operate 1 leg back with the original crew on a DH back) Only both CA and FO were on Greenslips and only 3 pax aboard for a 1 hour flight.
Think about that... 5 working crew, 2 deadheaders ...and 3 pax. I figure about $10k pay for just the operating CA/FO plus we burned about 2,200 lbs of gas per pax. At some point wouldn't it be cheaper to just charter our customers a private jet? Didn't we just buy Wheels Up?