I'm an American citizen flying from Seattle to London Through YVR. I know I have more than ample time to make my connection both going and coming back if I just hang out behind security--I'm just wondering if I will have time to meet a friend outside security or even leave the airport and go back through security. I've got 3 hours 56 minutes on my way to London, and 4 hours 30 minutes on my way home. As I'm typing this, I'm realizing that I should have planty of time if we stay in the airport--is there enough outside security to be worth it if I don't have time to go anywhere else? Both times, I'll be at YVR mid- to late afternoon, into early evening.