To truly experience the essence of Montreal in 2026, you should plan for at least 3 to 4 days. A 3-day itinerary allows you to cover the "Big Three": one day for Old Montreal (Vieux-Montréal) and the Old Port, where you can explore the Notre-Dame Basilica and cobblestone streets; one day for Mount Royal Park and the Plateau neighborhood to see the iconic colorful staircases and enjoy a famous St-Viateur bagel; and a third day for the Downtown core, the Underground City (RÉSO), and the world-class Fine Arts Museum. If you have a fourth day, you can venture out to the Space for Life (Espace pour la vie) complex to see the Biodome and Botanical Gardens, or explore the trendy Mile End district. Montreal is a city of distinct neighborhoods, and while you can see the highlights in 48 hours, the extra time allows you to indulge in the world-famous food scene—from smoked meat at Schwartz’s to high-end French bistros—without feeling rushed. If you visit during "Festival Season" (June/July), you might even want 5 days to account for the Jazz Fest or Just for Laughs events.