The usual round-trip price from Montreal to Washington is about $524 CAD, based on all of our scans. The lowest price we have recorded is $369 CAD, which is 30% below the usual price. Departures in October are cheapest on average ($482 CAD) and departures in April the most expensive ($584 CAD). Prices are fairly stable on this route: the gap between a cheap date and an expensive one stays small. The usual price to Washington is lower than that of 90% of the 21 destinations we track in North America from Montreal.
No deal sent to Washington yet
We track prices from Montreal to Washington every day. When a fare drops well below its usual level, we send it to subscribers. Subscribe to be alerted as soon as it happens.
When to fly from Montreal to Washington? 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 31, 2026 is the cheapest departure date from Montreal to Washington in our scans: $469 CAD on average, across all trip lengths and all prices recorded over time.
When to book a flight from Montreal to Washington? 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 Washington? 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 → Washington
Is the best price from Montreal to Washington really a good deal?
The average price across all of our Montreal → Washington scans is $524 CAD. Our best spotted price, $369 CAD, is 30% below that average.
When is the cheapest time to fly from Montreal to Washington?
Based on our daily scans, departures from Montreal to Washington in October are the cheapest (average $482 CAD) and departures in April the most expensive ($584 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 Washington?
Based on our scans, prices for flights from Montreal to Washington are lowest about 6 weeks before departure (-6% versus the normal price for the same departure date). In the final 2 weeks before departure, the difference is +29%. See the last chart above.
How long does a deal from Montreal to Washington 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 Washington drop?
Subscribe to En Plein Vol for free: we email flight deals from Montreal as soon as they are spotted.
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