The usual round-trip price from Montreal to Charleston is about $703 CAD, based on all of our scans. The lowest price we have recorded is $526 CAD, which is 25% below the usual price. Departures in October are cheapest on average ($684 CAD) and departures in March the most expensive ($758 CAD). Prices are fairly stable on this route: the gap between a cheap date and an expensive one stays small. The usual price to Charleston is higher than that of 60% of the 21 destinations we track in North America from Montreal.
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When to fly from Montreal to Charleston? 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.
Oct 28, 2026 is the cheapest departure date from Montreal to Charleston in our scans: $639 CAD on average, across all trip lengths and all prices recorded over time.
When to book a flight from Montreal to Charleston? Price by time before departure
Average round-trip price by how many weeks before departure the price was recorded. Read left to right: as departure gets closer, the price moves. Black dot: the cheapest lead time.
This chart is the average of all prices recorded over time, with all departure dates mixed together. It blends cheap and expensive departures (seasons), which is why its lowest point is much higher than the cheapest day in the previous chart. The next chart isolates the effect of when you book.
When to book a flight from Montreal to Charleston? Difference from the normal price
Each recorded price is compared to the average price of its own departure date, which removes the effect of seasons. Read left to right up to departure: below the green line means cheaper than usual for that date. Black dot: the cheapest lead time.
Example: -10% means that at that point, the price is on average 10% below the usual price for the same departure date.
FAQ: flights Montreal → Charleston
Is the best price from Montreal to Charleston really a good deal?
The average price across all of our Montreal → Charleston scans is $703 CAD. Our best spotted price, $526 CAD, is 25% below that average.
When is the cheapest time to fly from Montreal to Charleston?
Based on our daily scans, departures from Montreal to Charleston in October are the cheapest (average $684 CAD) and departures in March the most expensive ($758 CAD). The chart above shows the average price day by day for the coming year.
How far in advance should I book a flight from Montreal to Charleston?
Based on our scans, prices for flights from Montreal to Charleston are lowest about 22 weeks before departure (-3% versus the normal price for the same departure date). In the final 2 weeks before departure, the difference is +19%. See the last chart above.
How long does a deal from Montreal to Charleston 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 Charleston drop?
Subscribe to En Plein Vol for free: we email flight deals from Montreal as soon as they are spotted.
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