Originally Posted by FABismonte View Post
Reading between the lines, it looks like you can pay an overage (more than the budgeted amount) by Reward Credits (2 to 1) or by credit card. Also , Southwest won't allow seats to be held for 24 hours so prices for WN will fluctuate.
Yes this is correct. I have done this on two of my trips - once when I had more than 2 people in my traveling party, and once where my preferred itinerary was more than the allowance. Passport Travel booked all of the tickets, my Seven Stars/Diamond flight credits took care of the two tickets, and I gave Passport Travel my credit card via my host for the other tickets/overage. I didn't want to use RCs at a 2:1.