:
Note: Teams seeded 1–4 in each conference were based on their final standings from the round-robin. All teams advancing from the qualifying round were re-seeded 5–8 based on their regular season points percentage. Eastern Conference first round (1) Philadelphia Flyers vs. (8) Montreal Canadiens Philadelphia earned the first seed in the Eastern Conference after finishing 3–0 in the round-robin; during the regular season they finished with 89 points in 69 games for a .645 points percentage. Montreal earned the eighth seed in the Eastern Conference as the lowest advancing seed from the qualifying round by defeating Pittsburgh. This was the seventh playoff meeting between these two teams with both teams splitting the six previous series. They last met in the
2010 Eastern Conference Final, which Philadelphia won in five games. Philadelphia won two of the three games in this year's regular season series. The Flyers eliminated the Canadiens in six games. In game one,
Carter Hart made 27 saves against the Canadiens, defeating Montreal 2–1. Prior to game two, Canadiens head coach
Claude Julien left the bubble due to an emergency stent being placed in his coronary artery.
Kirk Muller was named interim head coach for the remainder of the series while Julien recovered in Montreal. Montreal tied the series after game two on
Tomas Tatar and
Jesperi Kotkaniemi two goals and
Carey Price's 30-save 5–0 shut out victory. In game three, Flyers forward
Jakub Voracek scored the only goal of the game and Hart turned away all 23 shots in a 1–0 shutout. Hart continued his shutout into game four, stopping all 29 shots in a 2–0 victory. In game five,
Joel Armia scored twice for the Canadiens forcing a sixth game after 5–3 victory.
Kevin Hayes had a goal and an assist in game six for the Flyers who defeated the Canadiens 3–2 and advanced to the second round.
(2) Tampa Bay Lightning vs. (7) Columbus Blue Jackets Tampa Bay earned the second seed in the Eastern Conference after finishing 2–1 in the round-robin; during the regular season they finished with 92 points in 70 games for a .657 points percentage. Columbus earned the seventh seed in the Eastern Conference as the second lowest advancing seed from the qualifying round by defeating Toronto. This was the second consecutive playoff meeting and second postseason match-up between these two teams. Columbus won
last year's Eastern Conference first round playoff meeting in a four-game sweep. Tampa Bay won the only game in this year's regular season series. The Lightning defeated the Blue Jackets in five games. In game one, with the match tied at two, the teams headed into overtime. At 10:27 of the fifth overtime, Lightning forward
Brayden Point ended the 3–2 marathon nearly six hours after its start. It was the fourth-longest game in NHL history. Columbus goaltender
Joonas Korpisalo made 85 saves during the affair, the most in a playoff overtime game since
1955–56 when league started keeping saves as a statistic.
Normie Smith is considered to have the all-time record for saves in a playoff game when he made 92 saves in a sextuple overtime game in
1936. The Blue Jackets tied the series on
Pierre-Luc Dubois's two assists and Korpisalo's 36 saves in game two, winning 3–1. In game three, Point continued his point streak scoring the second goal of a 3–2 Lightning victory.
Barclay Goodrow and
Yanni Gourde both scored and provided an assist for the Lightning in game four, who defeated the Blue Jackets 2–1 and took a 3–1 series lead. In game five, the Blue Jackets overcame a two-goal deficit to take the lead 4–2, however the Lightning were able to tie the score with 1:38 remaining in the game, which required overtime again. At 5:12 of the first overtime, Point's backhanded shot over Korpisalo ended the series, avenging last year's series for the Lightning, and sending them to the second round.
(3) Washington Capitals vs. (6) New York Islanders Washington earned the third seed in the Eastern Conference after finishing 1–2 in the round-robin; during the regular season, they finished with 90 points in 69 games for a .652 points percentage. New York earned the sixth seed in the Eastern Conference as the second-highest advancing seed from the qualifying round by defeating Florida. This was the eighth playoff meeting between these two teams, with the New York Islanders winning five of the seven previous series. They last met in the
2015 Eastern Conference first round, which Washington won in seven games. These teams split the four games in this year's regular season series. The Islanders defeated the Capitals in five games. In game one,
Josh Bailey's short-handed goal at 6:52 of the third period put the Islanders ahead 3–2, and with
Anthony Beauvillier's goal to make it 4–2, New York held onto their lead to take the victory.
Jean-Gabriel Pageau's two assists helped the Islanders take game two 5–2 taking a 2–0 series lead. The Islanders took a 3–0 series lead after game three ended in overtime on
Mathew Barzal's goal, giving New York a 2–1 victory. In game four,
Alexander Ovechkin's two goals extended the series for the Capitals in a 3–2 victory. Beauvillier's two goals helped shut the door against the Capitals, defeating them 4–0 and advancing to second round.
(4) Boston Bruins vs. (5) Carolina Hurricanes Boston earned the fourth seed in the Eastern Conference after finishing 0–3 in the round-robin; during the regular season they finished with 100 points in 70 games for a .714 points percentage. Carolina earned the fifth seed in the Eastern Conference as the highest advancing seed from the qualifying round by defeating the New York Rangers. This was the second consecutive postseason match-up and sixth playoff meeting overall between these two teams; with Boston winning four of the five previous series. Boston won
last year's Eastern Conference Final series in a four-game sweep. Boston won the only game in this year's regular season series. The Bruins defeated the Hurricanes in five games. Due to game one of the Blue Jackets–Lightning series extending to the fifth overtime, game one of this series was postponed to the next day. The Bruins and Hurricanes had their own overtime marathon in game one with the game tied at three, but the game ended at 1:13 of the second overtime with
Patrice Bergeron's goal. In game two,
Martin Necas assisted twice for the Hurricanes who defeated the Bruins 3–2. With
Tuukka Rask opting to leave the bubble,
Jaroslav Halak started game three for the Bruins during which he made 29 saves, defeating the Hurricanes for a 3–1 victory. In game four, the Bruins came back from a 2–0 deficit, scoring four goals in the third period to overtake the Hurricanes by a final score of 4–3. In game five,
David Pastrnak assisted twice in a defensive match defeating the Hurricanes 2–1 and advancing to the second round.
Western Conference first round (1) Vegas Golden Knights vs. (8) Chicago Blackhawks Vegas earned the first seed in the Western Conference after finishing 3–0 in the round-robin; during the regular season they finished with 86 points in 71 games for a .606 points percentage. Chicago earned the eighth seed in the Western Conference as the lowest advancing seed from the qualifying round by defeating Edmonton. This was the first playoff meeting between these two teams. Vegas won two of the three games in this year's regular season series. The Golden Knights defeated the Blackhawks in five games. In game one,
Reilly Smith scored twice and provided an assist for the Golden Knights' 4–1 victory. Smith then ended game two at 7:13 of the first overtime; his team was victorious by a score of 4–3. In game three, the Golden Knights continued their win streak, defeating the Blackhawks 2–1 on
Marc-Andre Fleury's 26 saves. Chicago ended Vegas' win streak in game four, riding on
Corey Crawford's 48 saves performance to defeat the Golden Knights 3–1. In game five,
Alex Tuch scored the go-ahead goal to put Vegas ahead in the third period. From there, they played defensively, turning away seven shots to win 4–3 and advance to the second round of the playoffs.
(2) Colorado Avalanche vs. (7) Arizona Coyotes Colorado earned the second seed in the Western Conference after finishing 2–1 in the round-robin; during the regular season they finished with 92 points in 70 games for a .657 points percentage. Arizona earned the seventh seed in the Western Conference as the second lowest advancing seed from the qualifying round by defeating Nashville. This was the second playoff meeting between these two teams. Their only previous meeting was in the
2000 Western Conference quarterfinals, which Colorado won in five games. These teams split their two-game regular season series. The Avalanche defeated the Coyotes in five games. The Avalanche limited the Coyotes to fourteen shots in game one and
Philipp Grubauer stopped all of them in their 3–0 victory. In game two, Avalanche right wing
Andre Burakovsky scored the game-winning goal with 2:53 remaining in the third period to defeat the Coyotes 3–2.
Darcy Kuemper made 49 saves in game three, giving the Coyotes a 4–2 victory and their first win of the series. The Avalanche provided a defensive and offensive approach to game four routing out the Coyotes 7–1 and limiting their shots to 15 giving them a chance to clinch in game five. In game five, the Avalanche continued their dominance in a 7–1 victory, advancing to the second round on
Nathan MacKinnon's two goals and two assists. This would later become the Arizona Coyotes' final playoff appearance during the franchise's existence, as by the end of the
2023–24 NHL season, the Coyotes would initially be considered a suspended operations team, with many of the franchise's assets (but not the team name and its history itself) going to what's considered a newly formed
Utah Hockey Club. However, the suspension status would only last for a couple of months before team owner
Alex Meruelo gave up the team's rights to the NHL after failing to acquire land from a planned auction in June 2024.
(3) Dallas Stars vs. (6) Calgary Flames Dallas earned the third seed in the Western Conference after finishing 1–2 in the round-robin; during the regular season they finished with 82 points in 69 games for a .594 points percentage. Calgary earned the sixth seed in the Western Conference as the second highest advancing seed from the qualifying round by defeating Winnipeg. This was the second playoff meeting between these two teams. Their only previous meeting was in the
1981 Stanley Cup Semifinals, which the then-
Minnesota North Stars won in six games. Calgary won two of the three games in this year's regular season series. The Stars eliminated the Flames in six games.
Dillon Dube scored twice for Calgary in game one as the Flames took the victory 3–2. In game two, with forty seconds remaining,
Jamie Oleksiak scored the game-winning goal for Dallas defeating Calgary 5–4.
Cam Talbot stopped all 35 shots he faced in game three defeating the Stars 2–0 and taking a 2–1 series lead. In game four, Stars forward
Joe Pavelski scored a hat trick and
Alexander Radulov's overtime-game winner tied the series 2–2, defeating the Flames 5–4.
Anton Khudobin made 28 saves for the Stars in game five, defeating the Flames 2–1 and taking a 3–2 series lead. In game six, the Stars recovered from a 3–0 deficit led by
Denis Gurianov's four goals, completing the series with a 7–3 victory.
(4) St. Louis Blues vs. (5) Vancouver Canucks St. Louis earned the fourth seed in the Western Conference after finishing 0–3 in the round-robin; during the regular season they finished with 94 points in 71 games for a .662 points percentage. Vancouver earned the fifth seed in the Western Conference as the highest advancing seed from the qualifying round by defeating Minnesota. This was the fourth playoff meeting between these two teams, with Vancouver winning all three previous series. They last met in the
2009 Western Conference quarterfinals, which Vancouver won in a four-game sweep. Vancouver won two of the three games in this year's regular season series. The Canucks defeated the Blues in six games. Canucks captain
Bo Horvat scored twice in game one, defeating the Blues 5–2. Although Blues forward
Samuel Blais tied game two with seven seconds remaining, Horvat's second goal of the game at 5:55 of overtime gave the Canucks a 4–3 victory and a 2–0 series lead. In game three,
Jake Allen made 39 saves and
Brayden Schenn scored the overtime-game winning goal, defeating the Canucks 3–2. The Blues evened up the series in game four, with
Ryan O'Reilly scoring twice in a 3–1 victory. Vancouver came back from a two-goal deficit in game five to defeat St. Louis 4–3 and take a 3–2 series lead.
Tyler Motte scored twice in game six, sending the Canucks to the second round and handily defeating the Blues 6–2. ==Second round==