Apart from the three point advantage, the Blues could be given an even bigger incentive should second placed Glentoran fail to beat Cliftonville in tonight's (Friday) game.
That would leave Linfield the chance to seal it and take the pressure off the last game at Seaview the following week.
"I am not getting drawn into what happens at Glentoran, the facts are we can make things a lot easier for ourselves in the final game by winning at Glenavon and that is our prime target. It is a big game for us, we are close, but yet so far away. You only have to look at all the Divisions across the water to see how things have turned in recent days. We know anything can still happen," said Jeffrey.
"Glenavon will not lie down, they showed that last week when they went to Portadown and beat their Mid-Ulster rivals and that will give them a huge lift. There is no pressure on them at all, we are expected to win and hopefully we will do that."
A draw last week against Glentoran and a defeat on Tuesday night in Dublin against St. Pat's might lead fans to think the Blues are running out of steam at the end of a long hard season. "I have no concerns on that front," added the boss. "We are not jaded at all, we did not play at our best in either game, but it was a good result in the derby with the Glens. On Tuesday the best team on the night won. St. Pat's were penetrative and created a lot of good chances. We had to hang in there and when it was only 1-0 there was always a chance but we were living on scraps around the goal. Had we scored it would have been perhaps against the run of play, but we will recover from that and we look forward to going to Lurgan.
"I have said for some time this would go to the wire and we are down to the last two games with still all to play for."