I am learning how to construct a true mileage run. I am in PHL for 48 hours and want to achieve as many PQM as possible at a good CPM. I have used ITA Matrix, but I believe Google Flight has almost the same initial info. From there I can find a flight to NRT connecting through IAD for about $1000. When I try to add other US cities as connections, the price goes up.

Is it better to price as an entire segment and look at routing, or just guess at stops that are allowed. Therein lies my confusion. how can I easily find out which cities to route through to make a reasonable mileage run, a fantastic mileage run.

Often I see a mileage run posted here, and when I type all the segments into google flight, it doe snot appears at that price. Is that because it is sold out or because I have to call United and have them book it...

Thank you.....