Title: £676 Cheap Flights from Montreal to Sydney (YUL to SYD) - Expedia.co.uk ![](https://images.trvl-media.com/place/178312/136253ce-3061-45f8-b8d7-9d9fb2223786.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178312/136253ce-3061-45f8-b8d7-9d9fb2223786.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £676 Cheap Flights from Montreal (YUL) to Sydney (SYD) [View £676 flight on Wed, 19 Nov 2025](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:YUL,to:SYD,departure:19/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:675.10&airProductToken=AQpXCikI0aQBEgM3NjQYmF0gwzsojsX9AjDoyv0COE5AAFgBcghOTFI1UjFSSQoqCNGkARIEODQwMRjDOyCSHiiZ0v0CMObY_QI4TkABWAFyCE5MUjVSMVJJEgoIARABGAEqAlFSGAEiBAgBEAEoAigDKAQwAQ) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Trudeau International Airport (YUL) to Sydney Airport (SYD) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![Emirates](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EK.svg) Emirates [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EK"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Air New Zealand](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_NZ.svg) Air New Zealand [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"NZ"}}]) - ![Qatar Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QR.svg) Qatar Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:yul,to:syd,departure:01/10/2025TANYT&leg2=from:syd,to:yul,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Cheap Flights from Montreal (YUL) to Sydney (SYD) Prices were available within the past 7 days and start at £676 for one-way flights and £1,132 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, 3 Dec - Sun, 7 Dec YUL Montreal SYD Sydney £1,132 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:03/12/2025TANYT&leg2=from:SYD,to:YUL,departure:07/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1131.30&airProductToken=AQqFAQorCMGGARIEODAwNRiYXSDYswEont7-AjDO3v4COEtAAFgBcghLTFhQMDJCQQorCMGGARIDMzQ1GNizASC4jQEomuH-AjDQ4_4COEtAAVgBcghLTFhQMDJCQQopCMGGARICMzMYuI0BIJIeKPDk_gIwq-z-AjhLQAFYAXIIS0xYUDAyQkEKVwopCMGGARICMzQYkh4guI0BKNSD_wIwuor_AjhLQABYAXIIS0xYUDAyQkEKKgjBhgESAzMwNBi4jQEgmF0o0Iv_AjDojf8COEtAAVgBcghLTFhQMDJCQRIKCAIQARgBKgJBQxgBIgQIARABKAIoAygEMAE) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, 3 Dec - Sun, 7 Dec YUL Montreal SYD Sydney £1,142 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:03/12/2025TANYT&leg2=from:SYD,to:YUL,departure:07/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1141.10&airProductToken=AQpXCioIwYYBEgM0MTcYmF0gmM4BKPrf_gIw1OD-AjhLQABYAXIIS0xYUDAyQkEKKQjBhgESAjMzGJjOASCSHijM4f4CMKvs_gI4S0ABWAFyCEtMWFAwMkJBCoQBCikIwYYBEgIzNBiSHiC4jQEo1IP_AjC6iv8COEtAAFgBcghLTFhQMDJCQQorCMGGARIDMTE0GLiNASCYzgEoyo3_AjDSj_8COEtAAVgBcghLTFhQMDJCQQoqCMGGARIDNDMwGJjOASCYXSiUkP8CMOaQ_wI4S0ABWAFyCEtMWFAwMkJBEgoIAhABGAEqAkFDGAEiBAgBEAEoAigDKAQwAQ) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, 19 Nov - Wed, 10 Dec YUL Montreal SYD Sydney £1,148 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:19/11/2025TANYT&leg2=from:SYD,to:YUL,departure:10/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1147.30&airProductToken=AQqFAQorCMGGARIEODAwNRiYXSDYswEo3sD9AjCSwf0COEtAAFgBcghLTFhQMDJCQQorCMGGARIDMzQ1GNizASC4jQEo2sP9AjCQxv0COEtAAVgBcghLTFhQMDJCQQopCMGGARICMzMYuI0BIJIeKLDH_QIw6879AjhLQAFYAXIIS0xYUDAyQkEKVwopCMGGARICMzQYkh4guI0BKLSl_wIwmqz_AjhMQABYAXIITExYUDAyQkEKKgjBhgESAzMwNBi4jQEgmF0osK3_AjDIr_8COExAAVgBcghMTFhQMDJCQRIKCAIQARgBKgJBQxgBIgQIARABKAIoAygEMAE) ![Qatar Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/QR.gif) Fri, 7 Nov - Thu, 20 Nov YUL Montreal SYD Sydney £1,166 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:07/11/2025TANYT&leg2=from:SYD,to:YUL,departure:20/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1166.00&airProductToken=AQpXCikI0aQBEgM3NjQYmF0gwzsojr78AjDow_wCOE5AAFgBcghOTFI1UjFSRQoqCNGkARIEODQwMRjDOyCSHiiZy_wCMObR_AI4TkABWAFyCE5MUjVSMVJFClcKKgjRpAESBDg0MDAYkh4gwzsowsb9AjDQzf0COE5AAFgBcghOTFI1UjFSRQopCNGkARIDNzYzGMM7IJhdKJ7S_QIwudj9AjhOQAFYAXIITkxSNVIxUkUSCggBEAEYASoCUVIYASIECAEQASgCKAMoBDAB) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Fri, 7 Nov - Thu, 20 Nov YUL Montreal SYD Sydney £1,177 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:07/11/2025TANYT&leg2=from:SYD,to:YUL,departure:20/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1176.70&airProductToken=AQqEAQorCM2qARIEMTk3NRiYXSCYzgEowbf8AjCnuPwCOFNAAFgBcghTU0UwWkZTUQoqCM2qARIDMjA4GJjOASCvNSjJu_wCMMjC_AI4U0ABWAFyCFNTRTBaRlNRCikIzaoBEgM3MzUYrzUgkh4o78T8AjDbyfwCOFNAAVgBcghTU0UwWkZTUQqEAQopCM2qARIDNTYyGJIeIK81KNzE_QIw0sn9AjhTQABYAXIIU1NFMFpGU1EKKgjNqgESAzIwNxivNSCYzgEosNH9AjCR2P0COFNAAVgBcghTU0UwWkZTUQorCM2qARIEMTk4ORiYzgEgmF0o39z9AjC33f0COFNAAVgBcghTU0UwWkZTURIKCAEQARgBKgJNVRgBIgQIARABKAIoAygEMAE) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, 8 Oct - Fri, 24 Oct YUL Montreal SYD Sydney £1,182 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:08/10/2025TANYT&leg2=from:SYD,to:YUL,departure:24/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1181.30&airProductToken=AQqFAQoqCNWCARIEMTE2MBiYXSCuHCj55vkCMJfo-QI4U0AAWAFyCFNMWDAwU0IwCisI1YIBEgQxOTY3GK4cIIu4ASi-6_kCMNHt-QI4U0ABWAFyCFNMWDAwU0IwCioI1YIBEgM4MzkYi7gBIJIeKLnu-QIwzPX5AjhTQAFYAXIIU0xYMDBTQjAKhwEKKgjVggESAzg0MhiSHiCLuAEoopT7AjDRmvsCOFNAAFgBcghTTFcwMFNCMAosCNWCARIEMjEyNxiLuAEgxI0BKMuc-wIwmp_7AjhTQAFYAXIIU0xXMDBTQjAKKwjVggESBDM2MTMYxI0BIJhdKPSf-wIw3qD7AjhTQAFYAXIIU0xXMDBTQjASCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAB) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Sun, 26 Oct - Sun, 9 Nov YUL Montreal SYD Sydney £1,217 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:26/10/2025TANYT&leg2=from:SYD,to:YUL,departure:09/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1216.30&airProductToken=AQqWAQovCMywARICODcYmF0guTwombX7AjDbuPsCOEtAAFgBaghFQ09TQVZFUnIFS05DQ0EKMAjMsAESAzEzOBi5PCDHMii0wPsCMInG-wI4S0ABWAFqCEVDT1NBVkVScgVLTkNDQQoxCMywARIEOTUwMRjHMiCSHijexvsCMP_K-wI4S0ABWAFqCEVDT1NBVkVScgVLTkNDQQqWAQoxCMywARIEOTUwMBiSHiDHMii_yvwCMOrO_AI4S0AAWAFqCEVDT1NBVkVScgVLTkNDQQowCMywARIDMTM5GMcyILk8KOLP_AIwltb8AjhLQAFYAWoIRUNPU0FWRVJyBUtOQ0NBCi8IzLABEgI4Nhi5PCCYXSic2fwCMJrd_AI4S0ABWAFqCEVDT1NBVkVScgVLTkNDQRIKCAEQARgBKgJMWBgBIgQIARABKAIoAygEMAE) ![Air New Zealand](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/NZ.gif) Fri, 8 May - Sun, 17 May YUL Montreal SYD Sydney £1,247 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:08/05/2026TANYT&leg2=from:SYD,to:YUL,departure:17/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1247.00&airProductToken=AQqPAQovCM60ARIENDUwMhiYXSC4jQEonbuMAzDrvYwDOEdAAFgBagJFQ3IIS0xXNzdDQTEKLQjOtAESAjIzGLiNASDAWijLvowDMInFjAM4S0ABWAFqAkVDcghLTFc3N0NBMQotCM60ARIDMTAzGMBaIJIeKMzGjAMwo8iMAzhLQAFYAWoCRUNyCEtMVzc3Q0ExCo8BCi0IzrQBEgMxMTIYkh4gwFoo1JqNAzCSnI0DOEdAAFgBagJFQ3IIR0xYNzdDQTEKLQjOtAESAjI0GMBaILiNASjlpY0DMPGrjQM4R0ABWAFqAkVDcghHTFg3N0NBMQovCM60ARIENDgwMRi4jQEgmF0ojK2NAzCyr40DOEtAAVgBagJFQ3IIR0xYNzdDQTESCggBEAEYASoCTloYASIECAEQASgCKAMoBDAB) ![Qantas Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/QF.gif) Sun, 26 Oct - Sun, 9 Nov YUL Montreal SYD Sydney £1,335 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:26/10/2025TANYT&leg2=from:SYD,to:YUL,departure:09/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1334.60&airProductToken=AQqPAQotCNGMARIEMzEzNRiYXSCuHCjesvsCMPmz-wI4T0AAWAFqBEVDU0xyBVFMWDBRCi4I0YwBEgQzMDEwGK4cIIu4ASihtvsCMLe4-wI4T0ABWAFqBEVDU0xyBVFMWDBRCi4I0YwBEgQ0MTEyGIu4ASCSHii6ufsCMMjA-wI4UUABWAFqBEVDU0xyBVFMWDBRCl0KKwjRjAESATcYkh4go7EBKPnJ_AIwltH8AjhRQABYAWoERUNTTHIFUUxYMFEKLgjRjAESBDQzNzcYo7EBIJhdKLnb_AIwld38AjhPQAFYAWoERUNTTHIFUUxYMFESCggBEAEYASoCUUYYASIECAEQASgCKAMoBDAB) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, 8 Oct - Fri, 24 Oct YUL Montreal SYD Sydney £1,401 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:YUL,to:SYD,departure:08/10/2025TANYT&leg2=from:SYD,to:YUL,departure:24/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1400.70&airProductToken=AQqEAQoqCMGCARIENjAyORiYXSDvWSiG5vkCMOrm-QI4TkAAWAFyCE5MWDBBVk4xCisIwYIBEgQyNDA4GO9ZIIu4ASi15_kCMJjq-QI4TkABWAFyCE5MWDBBVk4xCikIwYIBEgI3MxiLuAEgkh4oyO75AjDR9fkCOE5AAVgBcghOTFgwQVZOMQqEAQopCMGCARICNzIYkh4gi7gBKI6U-wIwzJr7AjhRQABYAXIIUUxXMEFWTjEKKwjBggESBDE3OTQYi7gBIO9ZKIKc-wIwvZ77AjhRQAFYAXIIUUxXMEFWTjEKKgjBggESBDYwMjcY71kgmF0ooaD7AjCPofsCOFFAAVgBcghRTFcwQVZOMRIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAE) ## Find the cheapest month to fly from Montreal (YUL) to Sydney (SYD) ### May is typically the cheapest month to fly From £840 - £1,294 per traveller. ## Frequently asked questions ### How much is a flight from YUL to Sydney Airport? > If you're planning on travelling between Pierre Elliott Trudeau Intl. Airport (YUL) and Kingsford Smith Intl. Airport (SYD), round-trip flights start from £1,132. This figure is based on airfares listed within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal pass you by. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Montréal–Trudeau to Mascot Airport? > This varies between airlines, as each has its own terms and conditions. Head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where there are instructions on how to cancel online. ### How do I find cheap flights from Pierre Elliott Trudeau Intl. Airport (YUL) to Sydney Airport that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Montréal–Trudeau to Sydney Airport flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Pierre Elliott Trudeau Intl. Airport (YUL) to SYD? > The distance is around 16,000 kilometres, so pack your carry-on luggage with all the items you need to make your journey comfortable. Wondering what to take on board your Dorval to Sydney flight? A sleep mask, earplugs and a neck pillow are among the essentials. ### Which airlines fly direct from Montréal–Trudeau to SYD? > If you want to fly straight from Montréal–Trudeau to Kingsford Smith Intl. Airport (SYD), you'll have to book a flight with at least one stop. Unfortunately, there are no airlines that fly directly between these airports. ### Are Pierre Elliott Trudeau Intl. Airport (YUL) to Mascot Airport flight tickets cheaper when they're purchased at the last minute? > Flight prices are always on the move, so not always. While last-minute deals between Montreal Airport and Sydney Airport are of course possible, it also makes sense to keep a close eye on prices well before you fly. In fact, some carriers publish their prices up to a year before the departure date. Expedia is constantly updating the best airfare bargains around, so keep checking and be ready to secure your seat when fare prices drop. ## Travel information | Origin airport | Pierre Elliott Trudeau Intl. | | --- | --- | | Destination airport | Kingsford Smith Intl. | | Airlines serving | Air Canada, Air China, Air France, Air New Zealand, American Airlines, Cathay Pacific, Emirates, Etihad Airways, Korean Air, Qantas Airways, Qatar Airways, Swiss International Air Lines, United | | Return price | £1,131 | | Distance | 15928 km | ## Book with confidence ### Compare flights from Montreal to Sydney easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Montreal to Sydney. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Kingsford Smith Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Pierre Elliott Trudeau Intl. to Kingsford Smith Intl..   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Pierre Elliott Trudeau Intl. (YUL) to Kingsford Smith Intl. (SYD) The easiest way to view the best deals on flights from Montreal to Sydney today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Pierre Elliott Trudeau Intl. to Kingsford Smith Intl. start at just £1,132 and range up to £1,401.   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Montreal and Sydney - booking your flight during December, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Montreal to Sydney flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Pierre Elliott Trudeau Intl. to Kingsford Smith Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. 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