Booking flights with different PNR

[pmhunter]

When booking flights for two passengers, is it better to book through the same portal or separately to maximize discounts or use a mix of points and revenue?

1. What are the drawbacks of having different PNRs for each passenger?
2. While most are aware, could you also highlight the disadvantages of having different PNRs for different legs of the journey, based on experience?"

 

[gamersgzb]

The price for the second ticket may increase by the time you book first ticket, it could be better to do both booking simultaneously but first check that flight is available for booking when you select two pax