Rare1 stop · 10.5h
WAS to LIMPeru
Lima
$347
usually $630
−45%
Most monthly lows $409–$630. Cheaper than every other month on record (3).
Flights · WAS → YUL
Washington to Montreal
Best fare, round trip
$317
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Thu 6 May
- Return
- Mon 10 May
- Stay
- 4 nights
- Flight
- 1 stop · 2.5h
- Airline
Air Canada
Cached fare — the booking search re-prices live before you pay.
CanadaMontrealFrench North America — cheap transatlantic fares in, and a summer festival calendar that never stops.Best windowJun–SepAirportsTrudeau (YUL)Every route into MontrealFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 2.5 hours outbound, on a 4-night trip — ticketed under Air Canada, which on a connecting fare need not operate every leg. We have 3 months of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in Montreal: Jun–Sep.
The 2 days we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 7% lower than when tracking began on 8 Aug — $391 then versus $364 now, across 18 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $278, on 3 Sep.
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cached fares · checked 15 Oct 2026
We are still collecting this route's months — 3 months of cached prices so far, too few to chart.
Route facts
- Airports
- Dulles (IAD) · Reagan National (DCA) · Baltimore (BWI) ↔ Trudeau (YUL)
- Flight time
- ≈2.5 hours outbound
- Distance
- ≈778 km each way
- Airlines on the board
- Air Canada
- Itineraries
- Connections on current fares
- Best months to visit
- Jun–Sep
Good to know
WAS → YUL, answered.
How far in advance should I book WAS → Montreal?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Washington to Montreal?
The current cheapest fares involve a connection, ticketed under Air Canada. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Montreal?
Lock the flight first — then compare stays for 6–10 May '27 · 4 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next WAS → YUL drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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