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Checked November 6, 2026 · last officially updated October 14, 2026
The usual round-trip price from Montreal to Buenos Aires is about $1239 CAD, based on all of our scans. The lowest price we have recorded is $1002 CAD, which is 19% below the usual price. Departures in April are cheapest on average ($1070 CAD) and departures in December the most expensive ($1609 CAD). Prices swing a lot on this route, so waiting for a price drop can pay off.
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What is the best month to fly from Montreal to Buenos Aires? Price by departure month
Typical round-trip price of each month's departures, all trip lengths, from all of our past and current scans (every January pooled, and so on). Prices are compared at the same booking lead time. The difference compares each month to the average of the months shown: a negative difference means cheaper than average. These figures firm up as we collect more scans.
| Departure month | Average price | Lowest seen | Difference | |
|---|---|---|---|---|
| January | $1248 | $1002 | +1% | |
| February | $1230 | $1002 | -1% | |
| March | $1237 | $1002 | +0% | |
| April | $1232 | $1002 | +0% | |
| November | $1237 | $1002 | +0% | |
| December | $1237 | $1002 | +0% |
When to fly from Montreal to Buenos Aires? Average price per day
Average round-trip price per departure date, all trip lengths, from all of our scans. Green line: the average price across all of our scans. Black dot: the cheapest day.
Nov 13, 2026 is the cheapest departure date from Montreal to Buenos Aires in our scans: $1002 CAD on average, across all trip lengths and all prices recorded over time.
FAQ: flights Montreal → Buenos Aires
Is the best price from Montreal to Buenos Aires really a good deal?
The average price across all of our Montreal → Buenos Aires scans is $1239 CAD. Our best spotted price, $1002 CAD, is 19% below that average.
When is the cheapest time to fly from Montreal to Buenos Aires?
Based on our daily scans, departures from Montreal to Buenos Aires in April are the cheapest (average $1070 CAD) and departures in December the most expensive ($1609 CAD). The chart above shows the average price day by day for the coming year.
How long does a deal from Montreal to Buenos Aires last?
Fare deals disappear fast: we treat a deal as active for 48 hours after it is sent. After that the price may have changed.
How do I get alerted when fares from Montreal to Buenos Aires drop?
Subscribe to En Plein Vol for free: we email flight deals from Montreal as soon as they are spotted.