Originally Posted by
UAX_Brasilia
It would be really easy if you just compile a list of every airport code you know of in the form:
lax; sfo; ord; iad; den; bos; ewr; jfk; lga; mht; sba; sea; mia; tpa; smf; ont; san;
and copy and paste it into ITA.
There, I even got the list started...people can go ahead and add to the list
PS - I wonder if ITA has a limit...
ITA has a limit on how much searching it will do. Ask a better question and it gives you a better answer. The more refining of the problem you do before turning to ITA the better. If you know you want to be on United metal, then using ITA is not the best option, except maybe to check fare bucket availability for specific flights on specific dates, but clearly others may be able to suggest even better ways to do that.