Airdrie had been left on the improper aspect of Championship play-off historical past once more, as a Simon Murray penalty gave Queen's Park a slim win at New Broomfield that sees them promoted as an alternative.
The Diamonds had taken the lead by means of Rhys McCabe's very good free kick, however Queen's Park levelled by means of Connor Smith.
They bagged their winner within the second interval of extra-time when McCabe fouled Simon Murray and the previous Dundee United and Hibs striker dusted himself down earlier than sending his aspect as much as the Championship.
That is onerous for Airdrie to take, having pushed champions Cove Rangers so shut this season, however an different season in League One beckons for them.
The primary half was pretty even, with Rhys McCabe placing Airdrie forward in 13 minutes with an outstanding free kick, however that lasted simply 5 minutes earlier than Connor Smith drew Queen's Park degree.
Nevertheless, the guests compelled a number of high quality saves from Max Currie to maintain the scores degree.
It was a lot the identical within the second half, with each side clearly making an attempt to win it, however Airdrie stepped up a gear and pushed Queen's Park in direction of the tip.
Queen's Park dominated the primary interval of extra-time, with some last-ditch defending and close to misses preserving Airdrie in it.
However Murray's penalty was the distinction for the Spiders, who will transfer up a league subsequent time period.
Diamonds boss Ian Murray made one change to the aspect that drew 1-1 within the first leg, as Jon Afolabi began instead of Gabby McGill, who was on the bench.
Queen's Park gaffer Owen Coyle made two switches, with Liam Brown and Louis Longridge in for Jake Davidson and Jai Quitongo, each of whom had been on the bench.
Airdrie almost took the lead within the first three minutes when Calum Gallagher discovered house on the appropriate and picked out Dylan Easton, however his prime corner-bound shot was fantastically pushed away by Callum Ferrie.
On the different finish Simon Murray broke clear on the appropriate and crossed for Luca Connell, however he failed to attach correctly along with his shot and the hazard was cleared.
Airdrie took the lead in 13 minutes when Jon Afolabi was fouled simply outdoors the field and McCabe fired the free kick straight into the underside left nook.
Queen's levelled in 18 minutes when Airdrie did not clear their traces and Connor Smith's curling shot beat Max Currie, by way of a deflection.
Luca Connell went shut in 27 minutes, however Currie fantastically pushed his shot away from the left nook.
Queen's began to edge the sport and in 35 minutes Longridge noticed a long-range effort pushed previous the left put up by Currie.
Airdrie's subsequent shot on course was barely unorthodox, as Adam Frizzell tried a drive from the appropriate hand aspect of the field, which was effectively taken by Ferrie on the close to put up in 40 minutes.
Afolabi confirmed some nice energy to make his means ahead in 48 minutes, however his fierce shot was taken on the second try by Ferrie.
Airdrie had been denied what they thought was a penalty in 58 minutes for a foul on Easton, however play raged up the opposite finish and Connell despatched a curling shot simply large of the left put up.
The Diamonds ought to have gone forward in 67 minutes when Easton slipped Gallagher by means of on objective, however he hesitated and Michael Doyle was in a position to make the saving deal with.
Murray ran by means of the center in 71 minutes and when his means was blocked, Smith picked it up b however noticed his shot from a good angle pushed onto the appropriate side-netting.
Queen's Park went mightily near taking the lead in 82 minutes when Murray despatched Smith down the appropriate, however his pushed cross flashed throughout objective with no takers.
Smith then tried a lob, however despatched it over the bar.
Airdrie ventured up the opposite finish in 84 minutes, with Adam Frizzell's shot deflected simply over the bar.
McCabe's lengthy throw-in from the appropriate reached the again put up, the place Scott Agnew's shot was effectively saved by Ferrie in 85 minutes.
Airdrie almost nicked it inside stoppage time when Agnew picked out Frizzell within the field, however his swerving shot landed the improper aspect of the appropriate put up.
Into further time we went, and Queen's Park almost drew first blood 5 minutes in, however Murray's cross from the left was headed simply over by Bob McHugh.
Murray went on one other run down the left, along with his cutback fired simply previous the close to put up by Smith.
Airdrie had been on the ropes at this level and Murray performed a neat one-two with Jai Quitongo earlier than seeing his shot blocked as Queen's Park tried to show the screw.
Queen's Park received it late in extra-time when Murray went down underneath a problem by McCabe, with referee Steven McLean pointing to the spot.
Murray almost bagged a second 27 minutes in, however noticed his shot pushed simply previous the appropriate put up.
The Queen's Park striker had one other go at ensuring within the last minute, once more seeing his shot pushed previous the appropriate put up.
AIRDRIE: Currie, Watson, McCabe, Fordyce, Paterson, Agnew, Afolabi (G. McGill, 77), Frizzell, Easton, Smith (S. McGill, 99), Gallagher (Allan, 90+2).
Subs (not used): Cantey (GK), Kerr, McDonald, Walker, MacDonald, Devenny.
Booked: Agnew (79), Easton (79), Paterson (107), Allan (114)
QUEEN'S PARK: Ferrie, Doyle, Grant (Kilday, 98), Fox, Robson, Brown, Lyon (Thomson, 78) , Longridge (McHugh, 68), Connell (Quitongo, 90), Smith, Murray.
Subs (not used): Heraghty (GK), Davidson, Longstaff, McBride, Darcy.
Referee: Steven McLean.
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