American Airlines: Frequent nonstop service from Dallas/Fort Worth (All Airports) (DFWA) to Toronto (All Airports) (YTOA), competitive fares in February, robust route reliability, and extensive loyalty benefits for AAdvantage members. Air Canada: Offers nonstop and connecting options, seamless connections across Canadian networks, and preferred access to Toronto hubs — good for travelers continuing to Mississauga, Vaughan, or Ottawa. WestJet: Often competitive pricing with connecting itineraries; useful for flexible travelers willing to accept connections in Calgary or other hubs. For February travel, weigh nonstop reliability (American, Air Canada) against potential savings on connecting itineraries (WestJet, Delta) and consider baggage, seat selection fees, and loyalty status when choosing a carrier.