Ontario to Montreal ONT → YHU, YUL
Ontario International Airport (ONT) → St. Hubert Airport (YHU), Montreal-Pierre Elliott Trudeau International Airport (YUL)
The cheapest return found recently is $729 with United Airlines, 13 Jan 2027 – 26 Jan 2027, found today.
Return
The cheapest return fare on each of 4 departure dates is usually $592 to $689.
Cheapest return found recently
$729
13 Jan 2027 – 26 Jan 2027 · United Airlines
Ontario International Airport (ONT) → Montreal-Pierre Elliott Trudeau International Airport (YUL)
Leaves 5:00 a.m. · Return leaves 1:20 p.m. · 21 h 21 min of travel, both ways together
out 1 stop, back 1 stop
found today
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$729 13 Jan 2027 – 26 Jan 2027found todaySee prices for these dates
$579 10 Feb 2027 – 13 Feb 2027found 4 days agoSee prices for these dates
What have prices looked like?
Over 23 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $525 to $655.
At $729, the cheapest return found recently is above that range.
23 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 20 Nov to 10 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 13-night return fares leaving within 3 days of 13 Jan 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Nov – 27 Nov | $675 | Frontier Airlines | Ontario International Airport (ONT) → St. Hubert Airport (YHU) | out 2 stops, back 2 stops | found 3 days ago | See prices for these dates |
| 20 Dec – 2 Jan 2027 | $596 | United Airlines | Ontario International Airport (ONT) → Montreal-Pierre Elliott Trudeau International Airport (YUL) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 13 Jan 2027 – 26 Jan 2027 | $729 | United Airlines | Ontario International Airport (ONT) → Montreal-Pierre Elliott Trudeau International Airport (YUL) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 10 Feb 2027 – 13 Feb 2027 | $579 | United Airlines | Ontario International Airport (ONT) → Montreal-Pierre Elliott Trudeau International Airport (YUL) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $579.
Airlines on the cheapest dates: United Airlines, Frontier Airlines.
Premium cabin fares from Ontario to Montreal
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 13 Jan 2027 – 26 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Montreal?
Return
The cheapest fares were 30 to 59 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (23 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $579 | $574 | Cheapest seen | 12 |
| 60–89 days | $655 | $525 | +13% | 21 |
| 90–179 days | $623 | $579 | +8% | 12 |
| 180+ days | $721 | $721 | +25% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Montreal
56 km from Ontario
$451
$278 less than flying from Ontario
13 Jan 2027 – 26 Jan 2027 · LAX → YHU · out 1 stop, back 1 stop
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Montreal
56 km from Ontario
$225
31 Oct · LAX → YUL · stops unknown
found 2 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 13 Jan 2027 – 26 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work