Wayne Rooney netted his 100th Premier League goal at Old Trafford before Marcus Rashford celebrated his England call-up by scoring during a 3-1 win in the re-arranged end-of-season fixture with AFC Bournemouth.
The sides reconvened two days on from their scheduled final-day clash being postponed when a suspicious package was found inside the stadium, prompting its evacuation.
Manchester City's 1-1 draw at Swansea City on Sunday ended United's hopes of beating their neighbours to fourth place and Champions League football next season – barring the fanciful notion of a 19-0 outcome in favour of Louis van Gaal's men against the Cherries.
That prospect was certainly far removed from the reality of a dour opening period, illuminated only by a wonderful team goal that allowed Rooney to score for the first time in 10 matches across all competitions.
Teenage striker Rashford, a day after being named in Roy Hodgson's preliminary Euro 2016 squad, played a classy role in the build-up to the opener and was on target himself with 16 minutes remaining.
Despite being forced to play closer to Saturday's FA Cup final against Crystal Palace than anticipated, Van Gaal stuck with the XI he named for the abandoned weekend encounter.
Michael Carrick, possibly playing in United colours at Old Trafford for the final time as his contract ticks down, stretched to get on the end of Rooney's 32nd-minute free-kick but could not divert the ball past visiting goalkeeper Adam Federici.
Rashford's trickery was an increasingly prominent feature and he clinically dispatched Valencia's knockdown from Rooney's raking pass for an eighth goal of the campaign.
Young had only been on the field for three minutes when he was the beneficiary of another sumptuous Rooney pass before the unfortunate Smalling diverted Max Gradel's shot past David de Gea to deny the United goalkeeper the Premier League Golden Gloves award.
- Wayne Rooney netted his 100th Premier League goal at Old Trafford; only Thierry Henry at Highbury has scored more at a single ground in the competition (114).
- Only bottom side Aston Villa (76) have conceded more top-flight goals this season than Bournemouth (67, level with Norwich).
- This was Manchester United’s 19th league win this season; their joint lowest total of victories in a Premier League campaign (also 19 in 13/14)
- Anthony Martial has had a hand in 15 Premier League goals this season (11 goals, 4 assists), more than any other Manchester United player.
- Marcus Rashford has been involved in seven goals in 11 Premier League appearances for Manchester United this season (five goals, two assists).
