Title: CA $261 Cheap Flights from Calgary (YYC) to Buffalo (BUF) - Expedia.ca ![Buffalo, NY](https://images.trvl-media.com/place/602674/87d981cf-5755-46d3-aea8-dd650f6a21eb.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/602674/87d981cf-5755-46d3-aea8-dd650f6a21eb.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $261 Cheap Flights from Calgary (YYC) to Buffalo (BUF) [View CA $261 flight on Fri, Dec 5, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:YYC,to:BUF,departure:05/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:260.41&airProductToken=AQqbAQoyCMGCARIEMTk3MxiYFiCjsQEoofb-AjCG-P4COEJAAFgBagVCQVNJQ3IIT1ZBQ1pOQlgKMgjBggESBDE1NzMYo7EBIK4cKN75_gIw7_r-AjhCQAFYAWoFQkFTSUNyCE9WQUNaTkJYCjEIwYIBEgQzMzQ0GK4cIIEtKLX-_gIwmf_-AjhCQAFYAWoFQkFTSUNyCE9WQUhVU0JYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) - [Roundtrip](?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 Calgary International Airport (YYC) to Buffalo Niagara Intl. Airport (BUF) - ![WestJet](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WS.svg) WestJet [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WS"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:yyc,to:buf,departure:07/11/2025TANYT&leg2=from:buf,to:yyc,departure:14/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) ![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 30% 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.ca/login) ## Cheap flights from Calgary (YYC) to Buffalo (BUF) Prices were available within the past 7 days and start at CA $261 for one-way flights and CA $508 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Sat, Dec 6 - Mon, Dec 8 YYC Calgary BUF Buffalo CA $508 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:06/12/2025TANYT&leg2=from:BUF,to:YYC,departure:08/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:507.66&airProductToken=AQqaAQoyCMGCARIEMjUyMRiYFiCjsQEoyv7-AjC8gP8COEJAAFgBagVCQVNJQ3IIT1ZBQ1pOQlgKMQjBggESAzk4MRijsQEgrhwokIH_AjCfgv8COEJAAVgBagVCQVNJQ3IIT1ZBQ1pOQlgKMQjBggESBDEwNzMYrhwggS0o84T_AjDXhf8COEJAAVgBagVCQVNJQ3IIT1ZBSVVTQlgKmgEKMQjBggESBDMzODIYgS0grhwohpj_AjCLmf8COEJAAFgBagVCQVNJQ3IITlZBSVhTQlgKMQjBggESAzg5MBiuHCCjsQEo9Zv_AjCZnf8COEJAAVgBagVCQVNJQ3IIT1ZBQ1pOQlgKMgjBggESBDE5NzMYo7EBIJgWKPCg_wIw5KL_AjhCQAFYAWoFQkFTSUNyCE9WQUNaTkJYEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Jan 21 - Tue, Jan 27 YYC Calgary BUF Buffalo CA $509 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:21/01/2026TANYT&leg2=from:BUF,to:YYC,departure:27/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:508.94&airProductToken=AQpmCiAIxJgBEgQyNDkyGJgWIMx8KI-EgwMwuoWDAzhFQABYAQogCMSYARIEMjc1NhjMfCDLASjthoMDMJCIgwM4RUABWAEKIAjEmAESBDUzOTcYywEggS0oloqDAzDuioMDOEVAAVgBCmYKIAjEmAESBDQ2NzAYgS0gywEoxMaDAzChx4MDOEVAAFgBCiAIxJgBEgQyMzQ5GMsBIMx8KNXKgwMwmsyDAzhFQAFYAQogCMSYARIEMjQ4NRjMfCCYFijyzIMDMK7OgwM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Jan 21 - Tue, Feb 10 YYC Calgary BUF Buffalo CA $538 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:21/01/2026TANYT&leg2=from:BUF,to:YYC,departure:10/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:537.29&airProductToken=AQpmCiAIxJgBEgQyNDkyGJgWIMx8KI-EgwMwuoWDAzhFQABYAQogCMSYARIEMjc1NhjMfCDLASjthoMDMJCIgwM4RUABWAEKIAjEmAESBDUzOTcYywEggS0oloqDAzDuioMDOEVAAVgBCmYKIAjEmAESBDQ2NzAYgS0gywEohOSEAzDh5IQDOEVAAFgBCiAIxJgBEgQyMzQ5GMsBIMx8KJXohAMw2umEAzhFQAFYAQogCMSYARIEMjQ4NRjMfCCYFiiy6oQDMO7rhAM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Jan 21 - Sun, Jan 25 YYC Calgary BUF Buffalo CA $562 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:21/01/2026TANYT&leg2=from:BUF,to:YYC,departure:25/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:561.96&airProductToken=AQpmCiAIxJgBEgQyNDkyGJgWIMx8KI-EgwMwuoWDAzhFQABYAQogCMSYARIEMjc1NhjMfCDLASjthoMDMJCIgwM4RUABWAEKIAjEmAESBDUzOTcYywEggS0oloqDAzDuioMDOEVAAVgBCmYKIAjEmAESBDEzODQYgS0g4Fwo5bKDAzDvs4MDOEVAAFgBCiAIxJgBEgQyOTgxGOBcIMx8KLi0gwMw3LWDAzhFQAFYAQogCMSYARIEMjQ4NRjMfCCYFiiytoMDMO63gwM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Jan 13 - Tue, Jan 27 YYC Calgary BUF Buffalo CA $566 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:13/01/2026TANYT&leg2=from:BUF,to:YYC,departure:27/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:565.55&airProductToken=AQpmCiAIxJgBEgQyNDkyGJgWIMx8KI-qggMwuquCAzhFQABYAQogCMSYARIEMjc1NhjMfCDLASjtrIIDMJCuggM4RUABWAEKIAjEmAESBDUzOTcYywEggS0olrCCAzDusIIDOEVAAVgBCmYKIAjEmAESBDQ2NzAYgS0gywEoxMaDAzChx4MDOEVAAFgBCiAIxJgBEgQyMzQ5GMsBIMx8KNXKgwMwmsyDAzhFQAFYAQogCMSYARIEMjQ4NRjMfCCYFijyzIMDMK7OgwM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Jan 27 - Thu, Jan 29 YYC Calgary BUF Buffalo CA $569 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:27/01/2026TANYT&leg2=from:BUF,to:YYC,departure:29/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:568.70&airProductToken=AQpmCiAIxJgBEgQyNDkyGJgWIMx8KM_HgwMw-siDAzhFQABYAQogCMSYARIENTM4NhjMfCCpUSiUyoMDMMTLgwM4RUABWAEKIAjEmAESBDUyNjQYqVEggS0o_s2DAzDhzoMDOEVAAVgBCmgKIQjEmAESBDQ2MzkYgS0g47QBKPjegwMwyd-DAzhFQABYAQohCMSYARIEMjY5NxjjtAEgzHwoi-CDAzCG4YMDOEVAAVgBCiAIxJgBEgQyNDg1GMx8IJgWKLLjgwMw7uSDAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, Nov 5 - Sat, Nov 8 YYC Calgary BUF Buffalo CA $578 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:05/11/2025TANYT&leg2=from:BUF,to:YYC,departure:08/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:577.06&airProductToken=AQpECiAI1YIBEgQxNjU1GJgWIK4cKNmk_AIwrqb8AjhOQABYAQogCNWCARIEMzU3NBiuHCCBLSjqpvwCMNin_AI4TkABWAEKQwogCNWCARIEMzQzMRiBLSCuHCjwwvwCMO3D_AI4TkAAWAEKHwjVggESAzc2NBiuHCCYFiiVxPwCMPvF_AI4TkABWAESCggBEAEYASoCVUEYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Nov 11 - Wed, Dec 10 YYC Calgary BUF Buffalo CA $580 Roundtrip found 22 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:11/11/2025TANYT&leg2=from:BUF,to:YYC,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:579.75&airProductToken=AQqnAQo1CMSYARIENDA3MhiYFiDyEij15fwCMIPn_AI4RUAAWAFqCU1BSU5CQVNJQ3IIWEFVTkEwQlEKNgjEmAESBDIyNDQY8hIg47QBKPvo_AIwxur8AjhFQAFYAWoJTUFJTkJBU0lDcghYQVVOQTBCUQo2CMSYARIEMzE5MhjjtAEggS0oxev8AjCN7PwCOEVAAVgBaglNQUlOQkFTSUNyCFhBVU5BMEJRCqUBCjUIxJgBEgQ1NzY0GIEtIMsBKLSq_wIwj6v_AjhFQABYAWoJTUFJTkJBU0lDcghWRFZTQTBCQwo1CMSYARIEMjM0ORjLASDMfCjUrv8CMJaw_wI4RUABWAFqCU1BSU5CQVNJQ3IIVkFVTkEwQlEKNQjEmAESBDI0ODUYzHwgmBYo8rD_AjCtsv8COEVAAVgBaglNQUlOQkFTSUNyCFZBVU5BMEJREgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) ![WestJet](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/WS.gif) Tue, Nov 11 - Wed, Dec 10 YYC Calgary BUF Buffalo CA $604 Roundtrip found 22 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:11/11/2025TANYT&leg2=from:BUF,to:YYC,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:603.53&airProductToken=AQpmCjEI16YBEgQxOTkyGJgWIOBcKMLi_AIwyOT8AjhLQABYAWoFRUNPTk9yCEtPUUQwWkVTCjEI16YBEgQ2OTI1GOBcIIEtKMjl_AIwwOb8AjhLQAFYAWoFRUNPTk9yCEtPUUQwWkVTEgoIARABGAEqAldTGAEiBAgBEAEoAigDKAQwAQ) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Tue, Nov 11 - Sat, Nov 15 YYC Calgary BUF Buffalo CA $769 Roundtrip found 7 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:YYC,to:BUF,departure:11/11/2025TANYT&leg2=from:BUF,to:YYC,departure:15/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:768.11&airProductToken=AQpnCiAIwYYBEgMxNTIYmBYgmM4BKOvq_AIw2ez8AjhHQABYAQohCMGGARIENTE0MRiYzgEgrhwo5u_8AjDk8PwCOEdAAVgBCiAIwYYBEgQzOTU4GK4cIIEtKIjy_AIw6fL8AjhHQAFYAQpnCiAIwYYBEgQ1MjE1GIEtIK4cKLaT_QIwtJT9AjhHQABYAQohCMGGARIEMTA0ORiuHCC4jQEolJb9AjCnmP0COEdAAVgBCiAIwYYBEgMyMjYYuI0BIJgWKJ-Z_QIw-Jn9AjhHQAFYARIKCAEQARgBKgJBQxgBIgQIARABKAgoBDAB) ## Find the cheapest month to fly from Calgary (YYC) to Buffalo (BUF) ### October is typically the cheapest month to fly From CA $373 - CA $777 per traveller. ## Alternative airports near Buffalo Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:YYC,to:BUF,departure:07/11/2025TANYT&leg2=from:BUF,to:YYC,departure:27/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) BUF Buffalo Niagara Intl. CheapestClosest 16 min [Flights from CA $1,054](https://www.expedia.ca/Flights-Search?leg1=from:YYC,to:BUF,departure:07/11/2025TANYT&leg2=from:BUF,to:YYC,departure:27/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) Flight from Calgary to Buffalo (YYC - BUF) route information | Origin airport | Calgary Intl. | | --- | --- | | Destination airport | Buffalo Niagara Intl. | | Airlines serving | Air Canada, Alaska Airlines, American Airlines, Delta, United, WestJet | | Roundtrip price | CA $508 | | Distance | 2776 km | ## Calgary to Buffalo Flights **The easy way to book your flights from Calgary to Buffalo**  With Expedia, it’s simple to find and book flights to Buffalo from Calgary whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Buffalo Niagara Intl., too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Calgary to Buffalo today, tomorrow, or this week.   **Save dollars with cheap flights from Calgary Intl., YYC to Buffalo Niagara Intl., BUF**  Sort your search results by price to find great deals on your flight from Calgary to Buffalo—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Buffalo from Calgary currently is just CA $508 rising to CA $769.   Here are more money-saving tips:  - Fly in December when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to Buffalo   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to Buffalo from Calgary**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Buffalo with Expedia today. ## Frequently asked questions ### How much is a flight from YYC Calgary International Airport to Buffalo Niagara International Airport? > Based on airfares available within the last 7 days on Expedia for flights departing within the next year, round-trip journeys between YYC Calgary International Airport and BUF start from CA $508. Book ASAP to score the best price for your journey. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Calgary Intl. Airport (YYC) to Buffalo Niagara International Airport? > Most flights can be conveniently cancelled online, but whether or not you are charged a fee differs between airlines. If you do need to cancel your vacation, follow the easy instructions in the [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from YYC to BUF that have flexible change policies? > Use our "No change fees" filter to find flexible travel options for your flight from YYC Calgary International Airport to BUF. This allows you to secure a great deal ahead of time and still have the freedom to make changes without any extra fees. Keep in mind that you'll need to cover the fare difference. ### How many hours is the flight from YYC to BUF? > Lasting around 5 hours and 49 minutes, the flight between YYC and Buffalo Niagara Intl. Airport (BUF) is a good opportunity to do some last-minute trip planning. How about using the time to go over your itinerary for Buffalo? ### How far is the flight from YYC Calgary International Airport to Buffalo Niagara International Airport? > The flying distance from YYC Calgary International Airport to Buffalo Niagara Intl. Airport (BUF) is 2,800 kilometres. Squeeze in a nap or make a start on the latest bestseller and the journey will zip on by. ### Which airlines fly direct from YYC Calgary International Airport to Buffalo Niagara Intl. Airport (BUF)? > Unfortunately, there aren't any airlines that directly fly between YYC Calgary International Airport and Buffalo Niagara Intl. Airport (BUF). You'll have to book a flight with one or more stops. ### Are Calgary Intl. Airport (YYC) to Buffalo Niagara International Airport flight tickets cheaper when they're purchased at the last minute? > Late planners can sometimes find a bargain, with some of the cheapest fares from Calgary Intl. Airport (YYC) to BUF emerging a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates the best flight deals regularly — as early as a year in advance in some cases. 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