Cylinder UFO Sighted in Seattle, Washington

I was taking my dogs in my yard, noticing that there were a few planes in the sky, when far off and up in the sky I saw a long white completely straight object that looked like it was a white stick floating in the sky. At first I thought it was exhaust from a plan, but as I looked closer, I saw that it was completely straight and appeared like it could be a floating cylinder in the sky, maybe about the length of 3 or 4 planes - hard to judge distance and actual size. I stared at it for about 2 or 3 minutes, when I realized I should run inside to grab my phone to take a picture, I usually have my phone on me at all times! 20 seconds later when I came back it was gone. I think it left cause it knew I was gonna take a picture! My first ufo sighting! I'm excited.