Originally Posted by
armouredant
ITA isn't a route search; it's a fare search. The answer is the reason you can't see the whole journey as one fare on Google Flights (which does the same thing) - no airline sells a ticket that includes these flights together. AA and UA have no interline agreement that I'm aware of, and even if they did, they would have to have filed a fare that was valid on this route, which they haven't done, so neither of them will sell you this ticket, so ITA can not give you what you're asking it for.
Originally Posted by
ChocolateFactory
No, ITA can’t do that. It will only show separate fares when they can be combined into a single ticket, which isn’t possible with your UA/AA scenario.
Kiwi, however, sells you separate tickets on a single booking, so you can use their search for cases like this. But you should still book directly with the airlines.
Thanks for telling me about Kiwi -- It is showing me what I have been able to do on ITA previously (and can get results with if I don't exclude ATL on ITA). Strangely still don't see the route I can create with UA + AA if I do separate searches on Google Flights. Again, I understand that there will not be a single ticket for this trip and that I will have to be each part of it through the different airlines directly.
I have used ITA in the past to help organize the times/layovers/specific cities, etc., and not just for fare finding.
Appreciate the help.
Maybe if I have enough posts I can show some screenshots that will make more sense. Not sure how else to describe what I am looking to do.