Wildfires rage across the state and Era Alaska must ferry fire crews to combat the blazes. Ponts has to navigate the deadly Merrill Pass on his first training flight and Ariel braves the treacherous Alaskan skies on her own for the very first time.
The approaching winter darkness fuels a mass exodus from Unalakleet. In Barrow, a bootlegger attempts to smuggle in illegal liquor and Luke races to complete a daring rescue before the sun sets for two months straight.
Pilot Luke Hickerson transports dangerous chemicals from Barrow to the remote village of Atqasuk. Then, in Unalakleet, the cold and dark winter claims its first casualty and Jim must make arrangements to transport the casket.
Era Alaska makes a special canine delivery to four-time Iditarod champion Lance Mackey in Fairbanks. After the first snow in Unalakleet, Jim and Ferno cope with an influx of schoolteachers on their busiest day of the year.
A dangerous frozen river landing leaves Jim and Ferno skating on thin ice, while Ariel's flying lessons end in disaster. The biggest snowstorm of the season hits, shutting down all of Western Alaska and leaving several Era pilots up in the air.
Two pilots attempt to deliver a specialty drill through a sea of fog. Luke brings the first ever ATM to Wainwright, along with a planeload of cash. Erik races to deliver passengers and critical supplies before a spring storm shuts him down.
In a dangerous mission, pilot Doug Doherty flies along Russian airspace to transport volatile explosives to the island of St Lawrence. In Unalakleet, Ben slams into a large bird mid-flight.
In the series finale, after 30 years of running Era Alaska, Jim Tweto sets his eye on a new path. Doug loses all avionics while flying over the North Slope. Ariel comes face to face with the FAA in the last step of getting her pilot's license.
John Ponts fights heavy turbulence and angry passengers on a flight through the Nulato Hills. Jim and Ferno's leave the terminal in the hands of the pilots and Sarah's flight to rescue a villager lost in a storm turns into a battle for her own survival.
Unseasonably warm weather sends Jim up to the Brooks Range to look for potential landing strips. Ferno and Ariel prepare an Eskimo feast for returning pilot John Ponts and the week ends with an icy plunge into the Unalakleet River.