St-Viateur Bagel, Montreal
There are 2 well-known bagel factories in Montreal - Fairmount and St. Viateur. Both are in the Mile End district, within a short walking distance of each other. There, you can buy bagels while they're still nice and warm from the oven - either individual bagels, a half-dozen, or a dozen. Sesame seed bagels are the most popular, but there are others available too - poppy seed, everything bagel, cinnamon raisin, etc.
Though you can buy bagels from either factory at any supermarket and many depanneurs (convenience stores), it's cheaper to buy them straight from the factory (plus, they're warm and soft). The factories also sell spreads (cream cheese with different flavours), dips (such as tzatziki), smoked salmon, etc.
Both factories are open 24/7, so you can buy bagels at any time of the day/night. Some people claim they can taste the difference between the bagels from each place, but I've never noticed. I normally buy from Fairmount because it's closer to my place.
Fairmount bagel website - http://www.fairmountbagel.com
Address: 74 Fairmount west (Fairmount/Clark)
St. Viateur bagel website - https://www.stviateurbagel.com
Address - 263 St. Viateur west (St. Viateur/Parc)
The world's best bagels are found at St-Viateur Bagel on St-Viateur Street (near avenue du Parc) or at Fairmount Bagel on Fairmount Street (not far from avenue du Parc). I am not kidding...these bagels are fantastic. You might have to line up a bit to get your hot 1/2 dozen or dozen...but its worth it. I love the sesame seed (referred to as white seed) bagels, but the poppy seed (black seed) ones are fine as well. Take the #80 bus up Parc from METRO Place des Arts, it's not too far...and buy some of these bagels. Take some home with you on the plane, bus or train. And while you are up on avenue du Parc....walk around a bit. This is an interesting area, sometimes referred to as Mile End. Very hip and multi-cultural. I bet your bagels are gone before you arrive back at the hotel :-) I can smell them now!