OBJECT SEEN BY PASSEGER ON COMMERCIAL FLIGHT OVER IDAHO/UTAH BORDEROn 31 Aug 2011, this investigator was meeting an old USAF buddy at the Klamath Falls, Or. airport as he was flying in from Portland, Oregon via Dallas/Ft. Worth via Tulsa, Ok. This witness was on vacation in Oregon for a week.Upon arrival in Klamath Falls, Oregon... this investigator was surprised to hear that his old USAF friend had witnessed a UFO about an hour out from the arrivial at Portland International Airport.The following is the email that was sent on 14 Sep 2011 by the witness; (WITNESS EMAIL; UFO was flying SE @ about 30,000 ft. at an incrediable speed, was white in color and elongated like a missile shape maybe 100 ft. in length. Sitting on right side of plane and saw UFO to the right and below me approx. 1 mile away at about 4pm. Skies were clear with some clouds UFO entered clouds and vanished from sight.) Because of the time change, this would have been 3pm Mountain and 2pm Pacific time. This investigator spoke in depth with the witness, who was not only a USAF veteran of 4 years as a firefighter, but a former city police officer from California. This investigator also served 3 years with witness in the USAF at the same base.Some addtional information. Witness was flying in from Dallas/Ft. Worth on American Airlines flight 453 which was to land in Portland, Or. at approx. 3:05pm. Which would of put the time of the sighting Pacific Time about 2pm. Witness was amazed at the speed the object was traveling, which would of been SE to his NW direction of flight. His duration of the sighting was about 4-5 seconds.This investigator showed the witness a still photo of the Salida, Co. UFO. Witness confirmed that his sighting was simular to that incident, as far as shape and color. Witness stated that the speed was too fast for any conventional aircraft, including military.This investigator calculated Flight 453 was flying at an estimated speed of 500-570 mph which at the time of the sighting, the witness was over the Idaho/Utah border just north of Salt Lake City, about 500 miles from Portland, Oregon, plus or minus 100 miles about in the area of Interstate 84 and 15 at the Idaho/Utah border.Investigator also noticed from the UTAH map, that the Utah Test and Training Range was also in this general area, as well as the Dugway Proving Grounds. Most of this wide vast area is under the control of the U.S. Military.