According to the Dallas News (2012) based on a 50,000 people survey the best airlines to meet millionaires are as follows:
*Airline with the best chance of meeting a millionaire: Delta Airlines
*Airline flown by the most generous millionaires: American Airlines
*Airline flown by the wealthiest millionaires: United Airlines
It goes on to say you should avoid Southwest, Frontier, Spirit and Allegiant if you are looking for a millionaire. 

you forgot to mention that itsalso probably better not to fly ineconomy class;)

Makes sense.  I flew 150k miles with Delta last year.  They have the best first class service in the US.

How about your own plane...and i would never take advice flying on a cetain airline hoping to meet a man with money. What if the airline sucks I wouldn't risk my life for it. Anyway if your looking for love,  that could be at your local grocer....right