[4] He fell to 22 points in 1997–98 and ended the season in a dispute with the Lightning when he refused a demotion to the Adirondack Red Wings of the American Hockey League.

[11] Langkow was assigned to the Cleveland Lumberjacks of the International Hockey League to begin the 1998–99 season amidst trade rumours but was recalled after four games.

[14] He finished the season with 14 goals combined between Tampa and Philadelphia, and his development as a playmaking centre earned him the Pelle Lindbergh Memorial from his teammates as the Flyers' most improved player.

[15] He set new personal highs in goals and assists in 1999–2000, finishing with 50 points and helping the Flyers reach the Eastern Conference Final in the 2000 Stanley Cup Playoffs.

[2] The acquisition of Jeremy Roenick and Jiri Dopita by the Flyers in the summer of 2001 left Langkow, a restricted free agent, as the odd man out in Philadelphia.

[4] The Coyotes signed Langkow to a one-year, $2.95 million contract in August 2004,[21] but dealt him to the Calgary Flames less than two weeks later for Oleg Saprykin and Denis Gauthier.

[4] The Flames signed Langkow to a new contract prior to the 2005–06 season amidst high expectations as he was placed on the top line with captain Jarome Iginla.

[4] Langkow emerged as a top scorer for the Flames in 2006–07, becoming the team's offensive leader while Iginla was sidelined for several weeks by a mid-season knee injury.

[25] He reached the 30-goal mark (33) for the first time in his career, finished with a career-high 77 points and was the Flames nominee for the Bill Masterton Memorial Trophy for dedication and sportsmanship.

[33] He joined the Flames for full practices a couple weeks later, and by March 19 – nearly one year to the day of his injury – Langkow expressed hope that he would be able to return to action prior to the end of the season.

For his efforts at coming back from injury despite the Flames missing the playoffs for the second year in a row, Langkow was a finalist for the Bill Masterton Memorial Trophy that was ultimately won by Ian Laperriere of the Philadelphia Flyers.

[37] Langkow and his wife Stephanie have four children, and expressed a desire to put down roots in the city of Calgary as a reason for his decision to sign a long-term contract extension with the Flames in 2008 rather than test free agency.

Langkow's older brother, Scott was a goaltender who played 20 NHL games for the Winnipeg Jets, Phoenix Coyotes and Atlanta Thrashers.

[39] He also has a younger cousin, Chris Langkow, who is an ECHL All-Star and a Kelly Cup champion with the Alaska Aces, whom he frequently mentors and often gives advice.