YUL - SYD

$507 Find Cheap Flights from Montreal to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to Sydney departing on 7/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Sydney, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$1,035
Typical prices: $1,140-$1,782
Delta
Mon 8/3Sun 8/16
YUL - SYD • 2 stops
Cheapest one-way
$507
Typical prices: $1,079-$1,239
Delta
Tue 7/28
YUL - SYD • 2 stops
Top airlines
Cheapest • from $1,035 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Montreal and Sydney. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $2,334 (round-trip)
Shortest trip • 22h 49m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 40% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Montreal to Sydney (YUL-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to Sydney

Mon, Aug 3 - Sun, Aug 16
Delta Logo
6:47 pm - 6:50 am
YUL
-
SYD
46h 03m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
52h 25m
2 stops
$1,035Delta
Wed, Aug 5 - Wed, Aug 19
Delta Logo
7:00 am - 6:50 am
YUL
-
SYD
33h 50m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
28h 25m
2 stops
$1,036Delta
Mon, Aug 3 - Sun, Aug 16
Delta Logo
6:47 pm - 6:50 am
YUL
-
SYD
46h 03m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
52h 25m
2 stops
$1,039Delta
Mon, Jun 22 - Sun, Aug 2
Delta Logo
7:00 am - 6:50 am
YUL
-
SYD
33h 50m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
52h 25m
2 stops
$1,083Delta
Mon, Aug 3 - Fri, Aug 14
Delta Logo
6:47 pm - 6:50 am
YUL
-
SYD
46h 03m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
52h 25m
2 stops
$1,085Delta
Wed, Jul 1 - Wed, Jul 15
Delta Logo
6:50 pm - 6:50 am
YUL
-
SYD
46h 00m
2 stops
Delta Logo
9:15 am - 11:25 pm
SYD
-
YUL
28h 10m
2 stops
$1,086Delta
Mon, Jun 22 - Sun, Jul 12
Delta Logo
12:48 pm - 6:50 am
YUL
-
SYD
28h 02m
2 stops
Delta Logo
9:15 am - 11:52 pm
SYD
-
YUL
28h 37m
2 stops
$1,090Delta
Mon, Jun 22 - Sun, Jul 12
Delta Logo
7:00 am - 6:50 am
YUL
-
SYD
33h 50m
2 stops
Delta Logo
9:15 am - 11:52 pm
SYD
-
YUL
28h 37m
2 stops
$1,093Delta
Mon, Jun 22 - Thu, Jul 30
Delta Logo
7:00 am - 6:50 am
YUL
-
SYD
57h 50m
2 stops
Delta Logo
9:15 am - 11:40 pm
SYD
-
YUL
52h 25m
2 stops
$1,133Delta
Fri, Jul 24 - Fri, Aug 21
Delta Logo
6:47 pm - 6:50 am
YUL
-
SYD
46h 03m
2 stops
Delta Logo
9:15 am - 11:52 pm
SYD
-
YUL
28h 37m
2 stops
$1,136Delta
Booking Insights

KAYAK's insights & trends for Montreal to Sydney flights

Get data-powered insights and trends into flights from Montreal to Sydney to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney departing in August.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Sydney is May, where tickets cost $964 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $2,115 and $1,841 respectively.

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney, you should book around 3 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$507
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Montreal to Sydney

When to book flights from Montreal to Sydney

Are your dates flexible? Find out the best times to travel from Montreal to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Montreal to Sydney flights

  • What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney?

    In the last 5 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney was $507 for a one-way ticket and $1,035 for a round-trip.

  • Do I need a passport to fly between Montreal and Sydney?

    A passport is required to fly from Montreal to Sydney.

  • Which aircraft models fly most regularly from Montreal to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Montreal to Sydney?

    Star Alliance is the only airline alliance operating flights between Montreal and Sydney.

  • Which is the best airline for flights from Montreal to Sydney, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Montreal to Sydney are United Airlines and Air Canada. With an average price for the route of $1,574 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $1,650 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Montreal to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Montreal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Montreal with another airline. Booking your flights between Montreal and SYD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Montreal to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Montreal to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9860 reviews
7.7Boarding
7.1Entertainment
6.7Food
8.1Crew
7.3Comfort
Airline reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

2.0 MediocreGreg, Jun 2026
YYZ - ORD
Read more United Airlines reviews

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

Good but airlines getting smaller. I didn't like the meal but the service was fine. Flight was fine and luggage arrived. So good.

They were fast and I like how they used to entertainment system to play video about the safety.

Multiple delays and gate changes resulting in arrival with a 5 hour delay.

Didnt make it on flight. Flight was delayed. Then had to get rebooked for a flight that was 8 hours later. Guess who had to wait for 8 hours at the airport?

The flight was smooth, the plane was spacious and clean, the staff was kind and the food was decent.

Pretzels were a bit dry and dusty, however it is nice to have a choice between sweet and savory snacks.

The TV screen at my seat was not functioning for the entire duration of the flight. I informed a flight attendant about the issue, and I was told that I would receive a voucher as compensation. However, I never received this voucher afterward. I therefore kindly request to still receive the voucher that was promised to me.

Flight crew was great, and even the crew for checking bags! I had a question for a friend of mine flying tomorrow and the man I talked to was awesome and answered my questions and looked up things for me when he didn’t have to! I was able to give her current & accurate info for her flight and she was so appreciative too!!

As mentioned before the fact that my paid-for aisle seats had been changed to non-aisle seats is unacceptable. Happily one staff member at the boarding counter did correct it before the flights, otherwise I would have been forced to submit a formal complaint. If it happens again on return flights, I will put in a formal complaint.

Another good flight experience with Air Canada. The business section did not feature the full length sleeping arrangement, but this was a shorter trip. The food was excellent. But the flight crew was truly top tier: friendly, cheerful, helpful at all the right times. Air Canada truly outshines all U.S. carriers.

Everything could be better, the worst is the crew, looks like they are not happy in the work. Air Canada is downhill for years, every flight looks worst. Hope they can fix the issues, by now, just flying AC in toutes with no other alternatives. Shame.

This was my second leg of my trip and was delayed so was worried about my connection in Montreal. Still hungry so on boarding I asked a flight attendant if I could use my $14.00 voucher on the plane for food as I was starving. She said she would check and let me know but she never came back. So no food again as none was offered. Had to get my bags and check them again and that was ok but don’t understand why I had to go through security and because of them almost missed my flight. No food offered nor possibility to purchase food so still hungry and just watched a movie and hoped I could get food when I landed. Was able to use the $14.00 voucher to buy something and had my family bring food as I was now starving. I’ve been travelling on AC for years and this was my worst experience ever. After our flight got cancelled in SXM and was told the staff there didn’t work for AC so couldn’t do much to help us was not a good experience

Everything you need to know for your flight from Montreal to Sydney

Information on your arrival and departure airports