NEW : Captain most likely had food poisoning or the flu , airline says . Flight 473 from Seattle to Oregon was diverted to Seattle , Portland . The captain lost consciousness midair , Alaska Airlines says . First officer took over the flight , the airline says .
NEW : Captain most likely had food poisoning or the flu , airline says . Flight 473 from Los Angeles to Seattle was diverted to Portland , Oregon . The captain lost consciousness midair , Alaska Airlines says . First officer took over the flight , the airline says .