I dont do layovers of less than 2 hours if I can avoud it. Remember you have to travel to new gate and clear security.
Based on experience, I try to avoid transfers in Taipei, Manila and Istanbul.
The route I chose depends on my ultimate destination and my needs at the time. I therefore go BKK-Seoul or Japan-Lax, layover LAX then ultimate destination (after weed shopping, fab concentrates right near the airport) or
BKK-Frankfurt-NY. This route is nice because its only 11 hours to Frankfurt, then you can layover and go to an FKK (I do Sharks in Darmstadt) and then get a cheap flight to NYC (about 8 hours.) Of course the problem here is that there are three airports in NYC, so depending on where you are going after entering the states you may be airport switching, plus the airports are horribles.
Whats the ultimate destination? That affects which way you come in. You gonna meet her at a hub like LA of NYC. Ive come in through Dallas, Atlanta and Minneapolis too, but flight times are brutal. I try to spend the least amount of time in the air.
Use Skyscanner