Cheap flights from Boston to Montréal
The cheapest round trip from Boston to Montréal that travelers found recently is $402 with a carry-on: a $402 fare on Air Canada, which usually includes a carry-on. It leaves Fri, Oct 16 and comes back Sun, Oct 18.
Live prices for Fri, Oct 16 to Sun, Oct 18
Cheapest trips travelers found recently
| Leave | Return | Airline | Airports | Stops | Fare | Carry-on (est.) | Total | Live prices |
|---|---|---|---|---|---|---|---|---|
| Fri, Oct 16 | Sun, Oct 18 | Air Canada | BOS → YUL | 1 stop | $402 | Included | $402 | Live price |
| Sun, Nov 1 | Mon, Nov 2 | Porter | BOS → YHU | 1 stop | $430 | Included | $430 | Live price |
| Fri, Oct 23 | Mon, Oct 26 | Air Canada | BOS → YUL | 1 stop | $529 | Included | $529 | Live price |
| Fri, Oct 23 | Sun, Oct 25 | Porter | BOS → YUL | 1 stop | $542 | Included | $542 | Live price |
| Sun, Oct 25 | Mon, Oct 26 | Porter | BOS → YUL | 1 stop | $579 | Included | $579 | Live price |
| Tue, Oct 20 | Sat, Oct 24 | Porter | BOS → YUL | 1 stop | $583 | Included | $583 | Live price |
Round-trip prices per person, from real fares travelers found in the last few days. Carry-on fees are our estimate for each airline, both ways. Prices change fast: check the live price before you book.
Cheapest month to fly
| Month | Cheapest trip | From | Live prices |
|---|---|---|---|
| October 2026 | Fri, Oct 16 to Sun, Oct 18, 2 nights | $402 | Live price |
| November 2026 | Sun, Nov 1 to Mon, Nov 2, 1 night | $430 | Live price |
Bag fees on this route
What the airlines flying Boston to Montréal usually charge for one bag each way. Budget airlines often sell the cheapest fares and charge the most for bags, so compare the total, not the fare.
| Airline | Carry-on, each way | Checked bag, each way |
|---|---|---|
| Air Canada | Included | $40 |
| Porter | Included | $40 |
Our estimates: fees depend on the fare type and when you pay. Check the airline's own price when you book.
How these prices work
These are real round-trip fares that travelers found on Aviasales recently, not a live search, so they can change or sell out. Dipt adds an estimate of each airline's carry-on fee, so a cheap fare with expensive bags doesn't look cheaper than it is. "Live price" opens Dipt's live flight search for those dates, where you book with the airline or travel site you pick. Dipt may earn a commission when you book, at no extra cost to you (how Dipt makes money).
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