Falkirk surged 14 points clear at the top of the First Division thanks to Darryl Duffy's 19th goal of the season.
The breakthrough came in the 34th minute when veteran midfielder John O'Neil squared for Duffy to fire low into the left corner of the net.
Airdrie went all out for an equaliser and Alan Gow saw home goalkeeper Allan Ferguson tip over his dipping drive.
As the visitors continued to dominate, Ferguson thwarted Willie McLaren on two separate occasions.
Falkirk: Ferguson, Lawrie, McPherson, McKenize, Campbell, James, O'Neil, Moutinho (Thomson 60), McBreen, Latapy, Duffy (Scally 77). Subs Not Used: Sharp, Marshall, Hill.
Booked: McBreen, McKenize, Lawrie. Goal: Duffy 34.
Airdrie Utd: McGeown, Docherty, Lovering, McGowan, McManus, Hardie, Roberts (Vareille 67), Marvyn Wilson, Coyle, Gow, McLaren. Subs Not Used: William Wilson, Barkey, Dunn, Hollis.
Booked: Hardie, Roberts.
Ref: S Conroy