PIX: Manchester Utd, Tottenham in Europa League final

Mason Mount scores Manchester United's first goal during the Europa League semi-final second leg against Athletic Bilbao, at Old Trafford, Manchester, on Thursday.

IMAGE: Mason Mount scores Manchester United's first goal during the Europa League semi-final second leg against Athletic Bilbao, at Old Trafford, Manchester, on Thursday. Photograph: Scott Heppell/Reuters

Manchester United booked their berth in the Europa League final after a 4-1 semi-final win Athletic Bilbao on Thursday, with Mason Mount scoring twice to hand the hosts a 7-1 aggregate win and a chance for the beleaguered team to hoist some silverware this season.

Languishing in 15th place in the Premier League, United kicked off the night with a comfortable cushion thanks to their stunning 3-0 victory a week earlier in Bilbao.

Mikel Jauregizar puts Athletic Bilbao ahead in the match.

IMAGE: Mikel Jauregizar sends the ball to the top corner to put Athletic Bilbao ahead in the match. Photograph: Jason Cairnduff/Reuters

United, the Europa League champions in 2017, will play Tottenham Hotspur in an all-Premier League final on May 21 at Bilbao's San Mames Stadium.

United kicked off the night with a comfortable cushion thanks to their stunning 3-0 victory a week earlier in Bilbao.

But Mikel Jauregizar put Athletic on the score sheet in the 31st minute after a terrible clearance attempt by Harry Maguire landed at the Spaniard's feet and he unleashed a blistering shot from outside the box into the top corner.

Alejandro Garnacho sends the ball over the crossbar with only Athletic Bilbao goalkeeper Julen Agirrezabala to beat.

IMAGE: Alejandro Garnacho kicks the ball over the crossbar with only Athletic Bilbao goalkeeper Julen Agirrezabala to beat. Photograph: Jason Cairnduff/Reuters

The goal made for some nervy moments in Old Trafford but the mood shifted dramatically when Mount, a second-half substitute, drew United level in the 72nd minute to finally silence the 5,000 singing Athletic fans. The midfielder latched on to a short pass from Leny Yoro before turning and firing past goalkeeper Julen Agirrezabala.

Casemiro scored with a glancing header from a free kick seven minutes later, and Rasmus Hojlund put the game out of reach in the 85th when Amad Diallo cut back the ball from the byline into the six-yard box and the Dane tapped it into an empty net.

Casemiro celebrates scoring Manchester United's second goal.

IMAGE: Casemiro celebrates scoring Manchester United's second goal. Photograph: Scott Heppell/Reuters

Diallo was then handed a mobile phone and posed with Hojlund and Yoro for a celebratory selfie in front of the partying Stretford End crowd.

Mount completed his double in added time when he spotted Agirrezabala well out of his net and fired a left-footed rocket from about six yards inside the visitors' half that hit the back of the net and had United boss Ruben Amorim laughing with delight.

"My first goals at Old Trafford. A special night. It was too long (waiting for such a night)," Mount said. "I carried on going, working hard in training every day and tried to stay positive and when I had an opportunity to try to make an impact.

Rasmus Hojlund celebrates scoring Manchester United's third goal.

IMAGE: Rasmus Hojlund celebrates scoring Manchester United's third goal. Photograph: Scott Heppell/Reuters

"Today it paid off and I came on and affected the game. It was a tight game when I came on, I just tried to calm it down."

Amorim said he would not be celebrating until United won the final and clinched an all-important spot in the Champions League next season.

"In this moment, I am just worried about the next game, trying not to get injuries for the final," he said. "We need to win it. If we don't win it, it means nothing for us."

Athletic boss Ernesto Valverde said his team made it too easy for United in the game's final minutes.

"Games last 90 minutes. You have to be on it for 90 minutes, especially against teams that won't let you off," he said. "It was almost like walk in the park for them at the end. Take away those last few minutes, it was much more even."

Tottenham ease past Bodo/Glimt

Dominic Solanke breaks into celebration after scoring Tottenham Hotspur's first goal against Bodo/Glimt at Aspmyra Stadion, Bodo, Norway.

IMAGE: Dominic Solanke breaks into celebration after scoring Tottenham Hotspur's first goal against Bodo/Glimt at Aspmyra Stadion, Bodo, Norway. Photograph: Paul Childs/Reuters

Tottenham Hotspur avoided any mishaps in the Arctic Circle by easing into the Europa League final with a composed 2-0 win at Norway's Bodo/Glimt for a 5-1 aggregate victory.

Ange Postecoglou's side never looked like relinquishing the lead they established last week in north London and goals by Dominic Solanke and Pedro Porro midway through the second half snuffed out any hope of a Bodo/Glimt comeback.

Despite a woeful Premier League campaign, Tottenham will now have the opportunity to win their first trophy since 2008 when they face their English rivals Manchester United in Bilbao on May 21.

Pedro Porro celebrates scoring Tottenham Hotspur's second goal.

IMAGE: Pedro Porro celebrates scoring Tottenham Hotspur's second goal. Photograph: Paul Childs/Reuters

Solanke, who also scored in the first leg, scrambled in a Cristian Romero header in the 63rd minute and Porro then deceived home keeper Nikita Haikin with a cross that looped in to spark celebrations from the few hundred away fans.

With Bodo/Glimt boasting a formidable record on the artificial surface at their Aspmyra Stadium, home fans arrived believing their team could turn around the tie and become the first Norwegian side to reach a European final.

Bodo dominated possession in the first half but Ole Blomberg's volley into the side netting was about the closest the hosts came to scoring on a disappointing night.