YVR-DEL is 6951 miles whereas JFK-HKG is 8071 miles as mapped out on the great circle route calculator.
So, no. It won't be the longest route. In fact, there are several other shorter routes that are still longer than YVR-DEL.
"Bangkok Tower, United 890 Heavy. Bangkok Tower, United 890 Heavy.....Okay, fine, we'll just turn 190 and Visual Our Way