Have you also considered UA
/LH for TUS
? A/c would be B735 / B744 / A320 in October, total travel time 15h06m - slightly longer in November with the DEN
-leg flown by a A346 then (winter schedule) ...
would require only 1 transfer, but that one would be in LHR
(something I personally would not recommend unless you have plenty of time).
Also you would have to drive up north to PHX
from Tucson adding 1.5-2h to your total travel time - personally I love to fly into and out of TUS
as it is a very easily to navigate airport and I like the people´s attire.
/LH) via ORD
: I would prefer to connect in DEN
Carpe diem ! Life is too short to waste your time ! Keep in mind, that today is the first day of the rest of your life !