$221 Cheap Delta flights Atlanta (ATL) to Montreal (YUL)

Grab cheap return Delta Air Lines flights from $461 from ATL to YUL by sorting your results from "Price (lowest to highest)" on Expedia. Or look for bargains from $221 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Check for Delta Air Lines flights from ATL to YUL about one month before you want to go. The cheapest time to book an international flight is usually 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. No matter your itinerary or ticket type, the best day to book international airfare is usually Sunday. Friday can be the most expensive. Travelers booking on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Leaving ATL at 9:10AM UTC-5, the earliest Delta Air Lines flight to YUL lands at 11:47AM UTC-5. Flying early means you'll be less likely to encounter delays or cancellations.* Don't like early starts? The last Delta Air Lines flight from ATL to YUL departs at 9:18PM UTC-5 and touches down at 11:52PM UTC-5.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

Delta Air Lines makes traveling from ATL to YUL more enjoyable with an excellent in-flight experience and a rewarding loyalty program. You even have the chance to collect points with Delta SkyMiles. Be sure to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.