The 25-year-old former Liverpool youngster had been a regular in the Blades team since joining from Falkirk two years ago.
But under Weir, he had been sidelined and had not played since the 3-1 defeat at Rotherham United on September 7.
But caretaker-manager Chris Morgan recalled the midfielder for Sunday’s game at Coventry City, and despite a 3-2 defeat, Flynn impressed to remind Blades fans what they had been missing.
“I don’t know the reasons behind it (me not playing),” said Flynn. “I just made sure I was available for selection. Football is a matter of opinions, and when you’re a manager his opinion is everything.
“Obviously I was disappointed I wasn’t involved, but it’s in the past now and I just want to do the job now I am back involved.
“When you are fully fit and train hard, you just want that reward of playing on a Saturday.
“I wasn’t involved, but just kept my head down and made sure I was working hard. You never know how quickly it call change, personally.
“It changed quickly and I was straight back in, now I am just looking to do my job for the team.
“At the end of the day, all that matters is getting the three points, it’s not about any individual, it’s about the team winning and getting this club back (up the table).”
Coach Chris Morgan, a former Blades captain and Lane legend, has taken charge of first-team affairs until a new manager is appointed and Flynn believes that has helped for a seamless transition.
“Morgs is in charge and has got the boys going,” he said. “It’s not been difficult (this week), we have got a game on Saturday and with the position we are in, we just have to win, it’s pretty straightforward.
“People talk about it being a hard period, with a change of manager, but I think Morgs has been brilliant for us and given us a big lift.”
Experienced coach Mick Wadsworth, 62, has been drafted in to aid Morgan.
“Mick (Wadsworth) has been around the block, has seen it and done it. He is someone I have known for many years,” said Morgan.