Join Date: Apr 2009
Location: Bye Delta
Programs: AA EXP, UA Silver, HH Diamond, IHG Plat, Hyatt Plat, Marriott Titanium, Nat'l EE, Avis PC, Hertz PC
Posts: 16,636
Read the Contract of Carriage for your airline. It does spell out circumstances in which you are entitled to cancel for a full refund even if you are not on a refundable ticket. With most carriers, a delay of 60-90 minutes is sufficient to trigger this.