YUL - SYD

$589 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 4/8. 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
$1,242
Typical prices: $1,168-$1,655
United Airlines
Sun 3/29Tue 4/14
YUL - SYD • 2 stops
Cheapest one-way
$589
Typical prices: $938-$1,126
Multiple Airlines
Wed 4/8
YUL - SYD • 3 stops
Top airlines
United Airlines
Cheapest • from $1,242 (round-trip)
United Airlines
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
Nadi (NAN)
Cheapest • Avg $972 (round-trip)
Nadi (NAN)
Shortest trip • 18h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 6% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 9% price drop
December
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

Sun, Mar 29 - Tue, Apr 14
United Airlines Logo
11:23 am - 7:55 am
YUL
-
SYD
29h 32m
2 stops
United Airlines Logo
9:30 am - 7:45 pm
SYD
-
YUL
24h 15m
2 stops
$1,242United Airlines
Sun, Mar 29 - Tue, Apr 14
United Airlines Logo
9:15 am - 8:00 am
YUL
-
SYD
31h 45m
2 stops
United Airlines Logo
10:20 am - 12:13 am
SYD
-
YUL
27h 53m
2 stops
$1,246United Airlines
Tue, Mar 24 - Tue, Apr 14
United Airlines Logo
2:13 pm - 7:00 am
YUL
-
SYD
25h 47m
2 stops
United Airlines Logo
9:30 am - 10:06 pm
SYD
-
YUL
26h 36m
2 stops
$1,251United Airlines
Wed, Apr 8 - Wed, May 6
United Airlines Logo
9:15 am - 7:00 am
YUL
-
SYD
31h 45m
2 stops
United Airlines Logo
9:30 am - 10:40 am
SYD
-
YUL
39h 10m
2 stops
$1,252United Airlines
Sat, Mar 28 - Sun, Apr 19
United Airlines Logo
2:13 pm - 7:55 am
YUL
-
SYD
50h 42m
2 stops
United Airlines Logo
10:20 am - 12:13 am
SYD
-
YUL
27h 53m
2 stops
$1,253United Airlines
Mon, Mar 23 - Wed, Apr 8
United Airlines Logo
4:45 pm - 9:15 am
YUL
-
SYD
25h 30m
2 stops
United Airlines Logo
10:20 am - 10:40 am
SYD
-
YUL
38h 20m
2 stops
$1,254United Airlines
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
3:00 pm - 9:15 am
YUL
-
SYD
27h 15m
2 stops
United Airlines Logo
2:00 pm - 3:16 pm
SYD
-
YUL
40h 16m
2 stops
$1,256United Airlines
Wed, Apr 1 - Sun, Apr 19
United Airlines Logo
2:20 pm - 8:00 am
YUL
-
SYD
26h 40m
2 stops
United Airlines Logo
9:30 am - 9:26 pm
SYD
-
YUL
25h 56m
2 stops
$1,265United Airlines
Wed, Apr 1 - Tue, Apr 14
United Airlines Logo
11:23 am - 8:00 am
YUL
-
SYD
29h 37m
2 stops
United Airlines Logo
9:30 am - 10:06 pm
SYD
-
YUL
26h 36m
2 stops
$1,266United Airlines
Wed, Apr 1 - Tue, Apr 14
United Airlines Logo
9:45 am - 8:00 am
YUL
-
SYD
31h 15m
2 stops
United Airlines Logo
9:30 am - 9:26 pm
SYD
-
YUL
25h 56m
2 stops
$1,268United Airlines
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 March.

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 April, where tickets cost $1,499 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,900 and $1,880 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 6% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$589
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 15% 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 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Sydney was $589 for a one-way ticket and $1,242 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 $1,584 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 $1,661 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 9382 reviews
8.1Crew
6.6Food
7.3Comfort
7.1Entertainment
7.7Boarding
Airline reviews

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

8.0 ExcellentAnonymous, Feb 2026
YEG - IAH
Read more United Airlines reviews

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

Flight attendants had a little attitude. Food tastes no good.

From pre boarding to flight attendant, crew and baggage handler, excellent. Didn’t lost my luggage like West jet.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

Reliable, nice crew, I fly often on that flight and I like it all.

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

l really enjoy very much the flight was very pleasant

The Sears in the 800s are not too good perfect Airbus why cant the new 737 fix that

Business Class was great with two exceptions: they should board Business Class Only first, then loyalty, then handicapped and families with young children then by zone. With all the loyalty and credit card holders and families with kids, dozens boarded before us and we were in row 3. My only other compliant with Air Canada is they don’t serve drinks and snacks in business class until at a cruising altitude. Transat and Emirates serve prior to takeoff which is especially nice during boarding of big planes and de-icing.

The only good part was what we paid for, we travelled premium economy, good comfort travelling with a baby. Flight with AirCanada was again delayed for more than 4 hours, service level is horrible and they don't care. They deliver the bare minimum for a world class price. If you can avoid canadian air lines, do so, oligopoly does not help them to strive for any service level.

We left over 2 hours late and they didn't even give us a complimentary snack, when getting to the desk I asked if I could be put in a row with only 1 other person or an empt y one I was told the flight was full when the last two rows were empty. All around over it

Again, we were rerouted all the way to Zurich and had a longer journey than expected.

Overall a good experience as this leg I was in Business Class. The Lounge was amazing with a view of the planes. The flight attendant spoke way to quickly when giving the information for take off and landing and it would be of no use to a first time traveler. Overall a great airline to travel on.

Smooth on-time flight but NO AC in the middle of the cabin. Business Class and the rear of the cabin were too cold but mid-cabin was stuffy and hot with virtually no air coming out of the ducts. Made for a very long and uncomfortable flight.

Air Canada’s problems are not staff related by and large, no. The problem is tiny jets between the U.S. and Canada - yes, believe it or not they are still “international” (just ask our own Mango Maniac in power in the U.S.). The little aisle is compounded by a design flaw of a “dog leg” starting at seat 12. Woe be unto you if you sit here as passengers and attendants do not have sufficient room to not hit you in the face with backpacks. One thing I will say very positively about Air Canada is you still provide pillows and blankets on transcontinental flights to all, not just the elites. Your tiny improperly designed jets are also a problem flying city to city within Canada also. One can only say you remind us of a “Jet Blue” or “Spirit” experience. Also your luggage space is downright Byzantine! We will endeavor to avoid you and use other U.S. carriers, albeit charging more.

Terrible canceled flight and lost my luggage. Flew me to Halifax. Tgat flight was delayed, had to spend night in airport chair.

The airplane has been replaced and late night layover have been extended from 3 to 7 and the only compensation was a $15 food voucher after most restaurants have been closed, not helping with children after a 18+ hour international flight

My seat was not comfortable. Flight was smooth. Regretfully we had two delays before takeoff

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

Information on your arrival and departure airports