Boeing's 777X flight test program is accelerating with 21 flights conducted as of February 19th. The longest flight was on February 9th that lasted just over six hours. Total flight time thus far is 61 hours 19 minutes. All flights, except for the first flight, have been conducted from either Boeing Field just south of Seattle or Spokane, WA. SEE stunning pictures of misty landings at Heathrow. The fights have been captured by many photographers including the ones in this story; Woody's Aeroimages,  @JoeScibelli, @Peytonloumar and @dgorun.  Credit above photo by @JoeScibelli