back again... thanks rankourabu and Pseudo Nim for the tips...

Now I got some dates and flights back from UA and ANA's searches...
I know that the airlines chosen are all subjected to massive scamcharges... I've warned them, but my parents don't seem to mind as much, as long as they get to fly the nicer airlines (they are in their 70s)

Is there any way to improve this?

September 18 (YYZ-ICN):
Option 1: YYZ-ICN, AC61 (777-300ER), J class
Option 2: YYZ-ORD-ICN, UA547 (319), J class / OZ235 (777-300ER), J class

September 24 (ICN-BKK):
Option 1: ICN-BKK, OZ741 (330), J class
Option 2: ICN-HKG-BKK, TG629 (777-200), J class

October 11 (BKK-HKG):
Option 1: BKK-HKG, TG638 (330), J class
Option 2: BKK-HKG, TG606 (747-400), J class

October 24 (HKG-YYZ):
Option 1: HKG-NRT-YYZ, UA78 (737-800), Y class / AC2 (777-300), J class
Option 2: HKG-ICN-YYZ, OZ746 (747-400), J class / AC62 (777-300), J class

The October 24 HKG-YYZ leg is toughest as there doesn't seem to have any availability... Even though OZ has J, the layover is insane. Y from HKG-NRT is the only available option. I even tried looking at HKG-IST-YYZ, but Turkish doesn't seem to have any seats in J.
Suggestions? Improvements? Any help is appreciated!