 In 2005 , due to the greater efficiency of the Boeing 737 Next Generation and rising costs for maintenance , fuel , and crew training , Alaska Airlines decided to phase out its remaining 26 MD @-@ 80s and trained its pilots to fly the newer Boeing 737 – 800s that were being ordered to replace them . According to the airline , the MD @-@ 80 burned 1 @,@ 100 US gallons ( 4 @,@ 200 l ) of fuel per hour , while the 737 – 800 burns just 850 US gallons ( 3 @,@ 200 l ) per hour . The last MD @-@ 80 flights flew on August 25 , 2008 , with one flight from San Jose , California to Seattle , Washington and another from Sacramento , California to Seattle , Washington . To mark its transition to an all @-@ Boeing fleet , Alaska Airlines unveiled a 737 – 800 with Boeing 's house colors painted on the fuselage and the airline 's Eskimo logo painted on the tail fin . The aircraft , called Spirit of Seattle , shows Alaska 's commitment to Boeing and the fact that the airline now has an all @-@ Boeing fleet . 
