Twenty-four hours after winning on Friday, Dahlstrom was again untouchable as the only female competitor to score over 80 points on two occasions in the final.
Her first run of 83.60 put her in the driving seat before the performances of her rivals over the remaining three runs meant Dahlstrom effectively had a victory lap on her third run.
She still put down the biggest score of the competition with 87.60 to finish on 171.20 overall for the win, with Italy's Silvia Bertagna second on 160.00 and Tora Johansen third on 121.60.
That was enough for her to finish the Big Air season on 453 points, with Bertagna second on 360.
In the men's competition, victory went to Norway's Birk Ruud but it was not enough to take the Crystal Globe from Sweden's Henrik Harlaut.
Ruud impressed to finish on 189.80, slightly ahead of France's Antoine Adelisse on 187.40 while Norway's Felix Stridsberg-Usterud was third on 181.20.
Harlaut was in fact fifth on 171.00 but he already had an unassailable lead in the standings, finishing on 394 to Ruud's 251 points.
Read the original article on Eurosport: Sweden dominate Big Air as Dahlstrom and Harlaut win Crystal Globes