The Red Devils and Villarreal will face off against eachother in this year's decider.
United lost 3-2 to Roma last night but won the tie 8-5 on aggregate.
Striker Edinson Cavani scored both United goals last night and has now notched seven in his last six games for the club.
His manager Ole Gunnar Solskjaer wants the 34 year old to stay with the Red Devils.
Arsenal couldn't break the deadlock against Villarreal in North London.
A goalless draw at the Emirates Stadium saw the Gunners exit 2-1 on aggregate.
The final will take place in Gdansk on May 26th.
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