Philadelphia has secured two of its core players within the past week. It also signed defenseman Ivan Provorov to a six-year contract with an AAV of $6.75 million on Thursday.
New Flyers head coach Alain Vigneault was critical of Konecny's contract holdout.
"I'm very disappointed that T.K. is not here," Vigneault said Friday, according to NBC's Jordan Hall. "It's the start of a new era, a new group, I felt that it was very important for everybody to be here.
"With my time in the NHL, my experience, anybody that falls behind - whether it's injury or in T.K.'s situation not coming to camp - usually it takes them a little bit of time to get back at it, especially at this time with a new coaching staff and new way of doing things."
Konecny, a first-round pick in 2015, tallied 24 goals and 49 points last season.
The Flyers have $1.17 million remaining in projected cap space, according to PuckPedia.