Choosing between nonstop and connecting flights for IAH to YYZ in February depends on priorities: nonstop flights (more convenient and faster, typically 3h45m–4h) reduce the risk of missed connections during winter weather, while one-stop options can sometimes be cheaper or offer better timing. If you value time and lower disruption risk, book a nonstop; for savings or better schedules, compare single-connection itineraries through hubs like Chicago (ORD), Newark (EWR), or Charlotte (CLT). Search terms to use: 'IAH YYZ nonstop', 'IAH YYZ 1 stop cheap'.