ST. LOUIS -- If the Calgary Flames continue to play like this away from home, they may not be all that eager to return to Alberta any time soon.

The Flames' top line of Jarome Iginla, Kristian Huselius and Daymond Langkow combined for 12 points, and the Flames won their fifth in a row on the road with a 5-3 victory over the St. Louis Blues on Sunday night.

Iginla had two goals and two assists, Huselius scored a goal and added four assists and Langkow added two goals and an assist for the Flames, who end a season-long six-game road trip Tuesday night in Columbus.

"They've got a lot of confidence," Flames coach Mike Keenan said of his top unit. "It's obvious when they're scoring goals, they've all got a lot of offensive jump, moving the puck well. Once you gain that confidence you can really perpetuate your offense and continue to get results and that's what they have been able to do. "

The Flames were a decisive 2-for-4 on the power play, while the Blues failed to execute on all three of their opportunities in the game.

Iginla's third-period power play goal at 7:55 proved to be the difference. It was his team-leading 23rd goal of the season.

"We want to keep our streak rolling, and it was a tough game," Iginla said. "It was a game that for a bit there was going back and forth as far as momentum."

Andy McDonald scored a goal and added an assist in his St. Louis debut, but it wasn't enough as the Blues have dropped four in a row, going 0-3-1.

"There's a good group here," McDonald said. "Things didn't go well tonight, but I was really impressed."

Miikka Kiprusoff stopped 14 of 17 shots to earn the victory, his 16th of the season and one off the NHL lead of San Jose's Evgeni Nabokov.

A pair of fights highlighted a four-goal second period in which each team scored twice.

Huselius scored his 14th of the season just 46 seconds into the second period when he banged in a rebound of his own shot past Manny Legace for a 2-1 Flames lead.

The Blues would score two goals 1:19 apart, with Brad Boyes and Lee Stempniak giving the Blues a 3-2 lead. Boyes' goal was his team-leading 19th, while Stempniak would net his sixth in 10 career games against Calgary.

Langkow converted a turnover by the Blues' Eric Brewer with 3:31 to play in the second, with Huselius collecting the assist. It was Langkow's 13th goal of the season.

"It's tough right now," Tkachuk said. "We're losing ground, but we competed tonight. The bottom line is getting results. We're just creeping down in the standings right now. We had chances to win the hockey game, but too many mistakes cost us."

Notes: The last time Calgary won five straight road games on the

same trip was Nov. 10-19, 1988. ... After winning the first 15 times they had scored three goals or more in a game, the Blues have now dropped three in a row. ... Huselius has 10 points (four goals, six assists) in the last two games. ... McDonald was acquired in a trade with Anaheim on Friday, sending Doug Weight, minor league prospect Michal Birner and a 2008 seventh round draft pick to the Ducks. ... The Flames have scored 22 goals during their current road winning streak. ... The Blues have allowed seven power play goals during their four-game slide, after leading the league in penalty killing for much of the season.