United came from behind to beat Juventus 2-1 on Wednesday to potentially put them within three points of qualifying for the knockout phase, but the Red Devils have been delayed in arriving to both of their European home matches this season.
Mourinho told BT Sport (h/t MailOnline's Will Griffee):
"We have a final now to play at home. We thought we would have two finals but now we have one final. If we win that final against Young Boys, if my maths is right—we qualify. I hope we arrive on time.
"We had an amazing escort here, thanks to the Italian police, let's hope we arrive on time, get the three points and qualify."
If United win against Young Boys on November 27 and Valencia fail to beat Juventus in Turin, Mourinho's side would secure a place in the knockout phase.
Few would have expected the Red Devils to be in such a position, particularly after Cristiano Ronaldo fired Juventus in front on Wednesday.
It's a position the Italian side rarely lose from, as OptaPaolo highlighted:
Samuel Luckhurst of the Manchester Evening News provided yet more impressive context to United's victory:
The win could change the outlook of the Red Devils' season, but it's important United make it count by seeing off Young Boys at home.
In the past, such a result would scarcely be in doubt, but this United side have slipped up and failed to beat the likes of Derby County, Wolverhampton Wanderers and Valencia at home this season, so it's far from guaranteed.
United have yet to win at home in the Champions League this season, having been held to a 0-0 draw by Valencia and then lost 1-0 to Juve.
What won't have helped in their preparations for those matches is that United were delayed in getting to Old Trafford on both occasions. For the former, kick-off had to be put back, and they were fined £13,000 by UEFA as a result.
Mourinho will want the team's preparation for their "final" to be as smooth as possible, so it's imperative they ensure there are no complications prior to the match.