While attending to others, including Stryker's son, the stewardess and doctor discover that both the pilot and co-pilot have also become seriously ill. Although it stays in the air on autopilot, no one is left to fly the plane. After the stewardess checks with other passengers, she determines that Stryker is the only one with flying experience, but he has not flown in 10 years and has no familiarity with aircraft of this size. Owing to dense fog on the ground obscuring the runway, Flight 714 must bypass Calgary and all other intermediate airports, to continue on to Vancouver.