In 2026, the cheapest way to travel from Toronto to Montreal is typically by megabus or similar long-distance coach services, with fares often starting as low as $35 to $55 if booked several weeks in advance. The journey takes approximately 6 hours and offers free Wi-Fi and power outlets. For those who prefer the train, VIA Rail offers "Escape" fares that can be competitive (around $55–$75) if you book on a "Discount Tuesday" or well in advance, though these tickets sell out quickly. Surprisingly, low-cost carriers like Porter Airlines and WestJet occasionally offer one-way flight "seat sales" starting at $66 to $90 from Pearson (YYZ) or Billy Bishop (YTZ), which can be cheaper than the train when factoring in the value of time. However, for consistent, last-minute affordability, the bus remains the undisputed budget champion for this busy inter-city corridor.