Is there a list of similar city pairs to use for your destination in ITA?

When searching for a mileage run, I'd like to be able to just have a list of combinations of cities to plug in.

For example:
1. SEA, PDX, SFO, SJC, OAK, SMF, MRY
2. PHX, LAS, PSP, SAN, CLD
3. LAX, BUR, ONT, SNA, LGB

I'd like to have this list so that I can avoid the 60 second timeout, but with similar airports (to avoid showing that IAH-DFW is much cheaper than IAH-SEA...because of course it would be)

I'm fine putting together this list myself, but wanted to check whether it already exists out there.

Thanks all!