"Thank you to Frolunda HC and HC Ambri-Piotta for being such great places to play. Your hospitality was greatly appreciated! #firstclass," Duchene wrote on Twitter.
The young forward went on to thank NHLPA Executive Director Donald Fehr and members for their hard work, without forgetting the fans, who have been so patient throughout the process.
"And finally, thank you Avs and all other #NHL fans who stuck with us through this, it was tough to say the least! You are the best. #GameOn," he added.
In 58 games with the Avalanche last season, Duchene posted 14 goals and 14 assists for 28 points.