PORTLAND, Ore. — An Alaska Airlines jetliner bound for Seattle made an emergency landing in Portland, Ore., Thursday night after the pilot lost consciousness, an airline spokesman said.

The co-pilot landed Flight 473 safely after declaring an emergency to get priority care for the pilot, spokesman Paul McElroy said. All of the airlines' pilots are trained to fly single-handedly.

The pilot lost consciousness "somewhere over Oregon,'' McElroy said, then later regained consciousness and left the cockpit. A doctor on board the flight tended to him in the cabin until the plane landed and was met by medical personnel on the runway.

The pilot, who was not identified, was taken to a hospital but there was no immediate word on his condition, McElroy said.

The Boeing 737-700 with 116 passengers and five crew members left Los Angeles about 6:30 p.m. and touched down in Portland at about 9 p.m. It had been due to arrive in Seattle at 9:30 p.m.

McElroy says the pilot has been flying for Alaska for 28 years and was current on his six-month medical evaluation. The co-pilot is an 11-year Alaska Air veteran.

On Jan. 22, the co-pilot on an Alaska Airlines flight from Seattle to Las Vegas fainted briefly, and the pilot requested emergency landing priority to get prompt medical assistance for him.

"At this point we do not believe there was a connection between the two incidents,'' McElvoy said.

Twenty passengers with a tight schedule for connecting flights were put on a Horizon Air shuttle flight to Seattle on Thursday night, the spokesman said.

A new pilot was dispatched to Portland to fly the remaining passengers to Seattle on board the same plane.

Earlier on HuffPost:

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  • Alcohol

    It's a good idea to wait until everyone's fully seated on the plane before getting intoxicated. <a href="http://www.cbc.ca/news/canada/calgary/story/2012/08/21/calgary-oil-executive-flight-disruption.html" target="_hplink">Justin Neil Frank, a 35-year-old Calgary man was arrested after forcing an Air Canada flight from London to Calgary back in August.</a> CBC reports Frank was drunk when he boarded the plane and kept drinking throughout — that is, when he wasn't walking down the aisles claiming to be an oil executive (he works as a rig service electrician). He was later tied down to his seat with duct tape and straps and arrested by the RCMP when the flight landed in Edmonton.

  • A Camera

    In late August, a United Airlines flight en route to Geneva, Switzerland from Newark, New Jersey was forced to divert in Boston because of an... ordinary camera. Well, to be fair, police and airline crew thought the unclaimed camera could potentially be a bomb, which is <a href="http://abcnews.go.com/blogs/headlines/2012/07/flight-diverted-over-unclaimed-camera/" target="_hplink">why the 169 people on board had to be removed from the plane</a> while bomb technicians disposed of the camera.

  • A Bad Joke

    The most recent restriction to flying has been the limitation of liquids, gels and aerosols to containers no greater than 100 ml or 100 grams. Combine this with a prank call and you've got the fixings for a bomb scare. Last September, a passenger was victim of a bomb hoax when someone called <a href="http://travel.usatoday.com/flights/story/2012-09-06/Philadelphia-to-Dallas-flight-returns-to-airport/57629992/1" target="_hplink">police at Philadelphia International Airport informing them that a passenger was "carrying a dangerous substance"</a>, as reported by USA Today. The passenger's name matched with someone on board a flight bound to Dallas-Fort Worth International Airport. The plane was forced to return to Philadelphia where police arrested the passenger, only to release him after realizing he had done nothing wrong.

  • A Prayer Box

    Back in January of 2010, a US Airways flight leaving New York and heading to Louisville, Kentucky had to divert to Philadelphia due to a misunderstanding over a teenager's prayer box. The 17-year-old Jewish boy was flying with his sister when he started using his <a href="http://www.foxnews.com/story/0,2933,583542,00.html" target="_hplink">tefillin, a set of small black boxes containing biblical passages that are attached to leather straps, attaching one box to his head and the other to his arm</a>, according to Fox News. Crew members of the flight questioned the boy but weren't able to get a "clear response" and asked the plane to turn back to Philadelphia for a more thorough investigation.

  • A Misunderstanding

    What can only be interpreted as a big misunderstanding is also the reason why a partially blind 86-year-old-man caused a Spirit Airlines flight from California to Florida to be diverted to Houston back in July. The man, who <a href="http://www.canada.com/health/Police+Partially+blind+scared+unruly+aboard+Spirit+flight+diverted/6905688/story.html" target="_hplink">only spoke French, became unruly and started swinging at passengers because he was "scared,"</a> reports Canada.com

  • Medical Help From Obama

    Back in May, a French woman managed to divert a US Airways flight from Paris to North Carolina after claiming she had been surgically implanted with a device. Flight 787 landed in Bangor International Airport unexpectedly after Lucie Zeeko Marigot, 41, said <a href="http://www.huffingtonpost.com/2012/05/23/us-airways-flight-diverte_n_1539618.html" target="_hplink">she had something inside of her that was "out of control" and was travelling to the U.S. to seek medical help from President Barack Obama and the American people</a>. Marigot was never charged by U.S. authorities but was sent back to France, according to U.S. Attorney, Thomas Delahanty II.

  • Flight Attendant Squabble

    What was supposed to be a normal flight from North Carolina to Chicago resulted in a diversion after a fight broke out between two flight attendants on board a United Airlines plane. Raleigh-Durham International Airport <a href="http://www.news.com.au/travel/news/flight-attendant-tiff-forces-plane-diversion-again/story-e6frfq80-1226482329909" target="_hplink">received an early morning call from the pilot of Flight 1214, saying that there was an assault on board</a>, according to News.com, when it was actually a verbal argument between two stewards. When the plane returned to North Carolina, the attendants were removed and the plane was restaffed.