$139+ Cheap flights from Atlanta (ATL) to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — YYZ
Sep 25 — Oct 21
Round-trip
1 adult, Economy
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Find cheap flights from Atlanta to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Atlanta to Ontario
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Cheapest flights from Atlanta to OntarioExplore the most affordable flight options available from Atlanta to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
Explore the most affordable flight options available from Atlanta to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:15 am -
1 stop11h 05m
Tue 9/224:15 pm -
2 stops14h 40m
Deal found 8/23![WestJet logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:15 am -
1 stop11h 05m
Mon 9/218:15 pm -
1 stop10h 30m
Deal found 8/23![WestJet logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:37 pm -
1 stop8h 18m
Mon 9/284:45 pm -
2 stops26h 28m
Deal found 8/25![Multiple Airlines logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:40 pm -
1 stop14h 12m
Mon 11/24:15 pm -
1 stop15h 41m
Deal found 8/24![Multiple Airlines logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:37 pm -
1 stop8h 18m
Mon 10/58:10 am -
1 stop11h 44m
Deal found 8/25![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:24 pm -
1 stop14h 31m
Tue 9/159:15 am -
1 stop13h 50m
Deal found 8/24![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:31 am -
1 stop6h 59m
Mon 10/194:45 pm -
2 stops16h 17m
Deal found 8/24![Multiple Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:30 am -
1 stop9h 50m
Sun 9/279:15 am -
1 stop23h 00m
Deal found 8/22![Multiple Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:25 pm -
1 stop16h 35m
Thu 9/171:30 pm -
1 stop10h 29m
Deal found 8/22![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:30 am -
1 stop9h 50m
Tue 9/299:15 am -
1 stop23h 38m
Deal found 8/24![Multiple Airlines logo]()
$287
This Justfly.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:05 pm -
1 stop10h 30m
Thu 9/178:15 pm -
1 stop10h 30m
Deal found 8/23![WestJet logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:37 pm -
1 stop8h 18m
Tue 10/69:50 am -
1 stop9h 23m
Deal found 8/25![Multiple Airlines logo]()
$288
Best flights from Atlanta to OntarioDiscover carefully curated flight deals from Atlanta to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
Discover carefully curated flight deals from Atlanta to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:24 pm -
1 stop14h 31m
Fri 9/251:40 pm -
1 stop20h 13m
Deal found 8/21![Multiple Airlines logo]()
$312
This FlightHub deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:15 am -
2 stops21h 20m
Thu 9/174:15 pm -
2 stops14h 40m
Deal found 8/22![WestJet logo]()
$319
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:40 am -
1 stop13h 16m
Mon 10/263:15 pm -
1 stop19h 03m
Deal found 8/25![United Airlines logo]()
$523
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:00 am -
2 stops11h 59m
Wed 10/146:00 am -
1 stop10h 35m
Deal found 8/24![Delta logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:30 am -
2 stops10h 00m
Mon 9/141:40 pm -
1 stop9h 25m
Deal found 8/24![Multiple Airlines logo]()
$375
This Justfly.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:15 am -
1 stop11h 05m
Tue 10/131:20 pm -
2 stops17h 35m
Deal found 8/22![WestJet logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:37 pm -
2 stops11h 48m
Tue 9/223:15 pm -
1 stop9h 46m
Deal found 8/25![Multiple Airlines logo]()
$387
This Air Canada deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:05 pm -
1 stop6h 22m
Mon 10/129:45 am -
1 stop6h 35m
Deal found 8/21![Air Canada logo]()
$899
This Justfly.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:15 am -
2 stops21h 20m
Mon 10/124:15 pm -
2 stops14h 40m
Deal found 8/26![WestJet logo]()
$447
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:37 pm -
2 stops11h 43m
Sun 10/48:35 am -
1 stop22h 10m
Deal found 8/25![Multiple Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:50 am -
1 stop9h 06m
Sat 10/243:15 pm -
1 stop9h 08m
Deal found 8/24![United Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:15 am -
1 stop11h 05m
Mon 10/127:00 am -
2 stops17h 06m
Deal found 8/25![Multiple Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:50 am -
1 stop9h 06m
Sat 10/103:15 pm -
1 stop9h 08m
Deal found 8/24![United Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:30 pm -
1 stop8h 09m
Wed 9/3011:38 am -
Nonstop2h 16m
Deal found 8/25![Delta logo]()
$600
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:50 am -
1 stop9h 06m
Wed 10/283:15 pm -
1 stop9h 20m
Deal found 8/21![United Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:25 am -
2 stops10h 44m
Wed 10/76:00 am -
1 stop9h 27m
Deal found 8/25![Delta logo]()
$601
This FlightHub deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:05 pm -
1 stop10h 30m
Sat 9/196:15 pm -
2 stops36h 30m
Deal found 8/21![WestJet logo]()
$572
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:50 am -
1 stop9h 01m
Mon 10/53:15 pm -
1 stop9h 08m
Deal found 8/25![United Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:30 pm -
1 stop8h 09m
Wed 10/71:34 pm -
Nonstop2h 11m
Deal found 8/25![Delta logo]()
$601
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:35 am -
1 stop13h 16m
Sat 10/33:15 pm -
1 stop9h 08m
Deal found 8/25![United Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:30 pm -
1 stop13h 05m
Wed 9/309:30 am -
1 stop13h 34m
Deal found 8/21![Delta logo]()
$616
This Mytrip deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:15 am -
2 stops16h 22m
Tue 10/134:15 pm -
2 stops21h 10m
Deal found 8/22![Multiple Airlines logo]()
$562
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:38 pm -
1 stop23h 13m
Thu 9/173:15 pm -
1 stop9h 30m
Deal found 8/24![United Airlines logo]()
$534
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:25 am -
1 stop6h 45m
Sat 10/313:45 pm -
1 stop5h 36m
Deal found 8/25![Air Canada logo]()
$899
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:40 pm -
Nonstop2h 19m
Thu 10/86:15 am -
Nonstop2h 26m
Deal found 8/25![Delta logo]()
$633
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/279:30 am -
1 stop8h 27m
Fri 10/307:44 pm -
1 stop14h 34m
Deal found 8/23![United Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:40 pm -
Nonstop2h 19m
Sat 10/36:34 pm -
Nonstop2h 21m
Deal found 8/25![Delta logo]()
$633
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:05 am -
Nonstop2h 18m
Tue 10/67:45 am -
Nonstop2h 20m
Deal found 8/25![Delta logo]()
$633
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:23 pm -
1 stop8h 12m
Wed 10/143:10 pm -
1 stop5h 21m
Deal found 8/25![United Airlines logo]()
$630
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:00 am -
Nonstop2h 38m
Mon 10/196:50 pm -
Nonstop3h 02m
Deal found 8/25![Delta logo]()
$633
Last-minute flights from Atlanta to OntarioDiscover last-minute flight deals from Atlanta to Ontario. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Atlanta to Ontario. Data last updated August 26, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:24 pm -
1 stop14h 31m
Tue 9/159:15 am -
1 stop13h 50m
Deal found 8/24![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:25 pm -
1 stop16h 35m
Thu 9/171:30 pm -
1 stop10h 29m
Deal found 8/22![Multiple Airlines logo]()
$287
This Justfly.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:05 pm -
1 stop10h 30m
Thu 9/178:15 pm -
1 stop10h 30m
Deal found 8/23![WestJet logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:15 am -
1 stop11h 05m
Tue 9/224:15 pm -
2 stops14h 40m
Deal found 8/23![WestJet logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:15 am -
1 stop11h 05m
Mon 9/218:15 pm -
1 stop10h 30m
Deal found 8/23![WestJet logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:20 pm -
2 stops25h 35m
Wed 9/307:45 am -
1 stop6h 50m
Deal found 8/24![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:30 pm -
1 stop17h 25m
Sat 9/269:15 am -
1 stop13h 50m
Deal found 8/25![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:37 pm -
1 stop8h 18m
Mon 9/284:45 pm -
2 stops26h 28m
Deal found 8/25![Multiple Airlines logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:30 am -
1 stop9h 50m
Sun 9/279:15 am -
1 stop23h 00m
Deal found 8/22![Multiple Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:30 am -
1 stop9h 50m
Tue 9/299:15 am -
1 stop23h 38m
Deal found 8/24![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:37 pm -
1 stop8h 18m
Thu 10/19:30 am -
1 stop8h 05m
Deal found 8/22![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2610:24 pm -
1 stop14h 31m
Tue 9/299:15 am -
1 stop14h 16m
Deal found 8/22![Multiple Airlines logo]()
$288
One-way flights from Atlanta to OntarioSearch for one-way flight options from Atlanta to Ontario. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Atlanta to Ontario. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:00 pm -
2 stops22h 32m
Deal found 8/26![Multiple Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:30 pm -
2 stops10h 55m
Deal found 8/24![Multiple Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:05 pm -
1 stop10h 30m
Deal found 8/25![WestJet logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:31 am -
2 stops16h 54m
Deal found 8/24![Multiple Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:37 pm -
2 stops11h 48m
Deal found 8/25![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:20 am -
2 stops17h 05m
Deal found 8/26![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/141:00 pm -
2 stops11h 20m
Deal found 8/25![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:00 pm -
2 stops27h 25m
Deal found 8/22![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:20 am -
2 stops17h 05m
Deal found 8/24![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:30 pm -
2 stops10h 55m
Deal found 8/23![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:20 am -
2 stops12h 12m
Deal found 8/23![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:30 pm -
2 stops27h 45m
Deal found 8/25![Multiple Airlines logo]()
$180
Find flight deals from Atlanta to Ontario
Keep the following information in mind while searching for Atlanta to Ontario flight deals. Data was last updated August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (Kiwi.com) |
One-way from | $139 (Kiwi.com) |
Popular in | July |
Cheapest in | October |
Average price | $622 |
Good round-trip deal | $544 or less |
Good one-way deal | $343 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Atlanta to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 26, 2026.
Use the filters below to find and compare flights from Atlanta to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AtlantaToronto
ATL Atlanta Hartsfield-Jackson - YTZ Toronto Island
ATLYTZ
Atlanta Hartsfield-Jackson
Fri 9/18
10:24 pm-12:55 pm
1 stop14h 31m
Toronto Island
Fri 9/25
1:40 pm-9:53 am
1 stop20h 13m
$312
AtlantaOttawa
ATL Atlanta Hartsfield-Jackson - YOW Ottawa
ATLYOW
Atlanta Hartsfield-Jackson
Mon 9/14
8:15 am-5:35 am
2 stops21h 20m
Ottawa
Thu 9/17
4:15 pm-6:55 am
2 stops14h 40m
$319
AtlantaToronto
ATL Atlanta Hartsfield-Jackson - YTZ Toronto Island
ATLYTZ
Atlanta Hartsfield-Jackson
Sat 9/12
6:30 am-4:30 pm
2 stops10h 00m
Toronto Island
Mon 9/14
1:40 pm-11:05 pm
1 stop9h 25m
$375
AtlantaMontreal
ATL Atlanta Hartsfield-Jackson - YUL Montreal Pierre Elliott Trudeau Intl
ATLYUL
Atlanta Hartsfield-Jackson
Thu 9/17
12:37 pm-12:25 am
2 stops11h 48m
Montreal Pierre Elliott Trudeau Intl
Tue 9/22
3:15 pm-1:01 am
1 stop9h 46m
$387
AtlantaOttawa
ATL Atlanta Hartsfield-Jackson - YOW Ottawa
ATLYOW
Atlanta Hartsfield-Jackson
Wed 10/7
8:15 am-7:20 pm
1 stop11h 05m
Ottawa
Tue 10/13
1:20 pm-6:55 am
2 stops17h 35m
$401
AtlantaOttawa
ATL Atlanta Hartsfield-Jackson - YOW Ottawa
ATLYOW
Atlanta Hartsfield-Jackson
Thu 10/1
12:37 pm-12:20 am
2 stops11h 43m
Ottawa
Sun 10/4
8:35 am-6:45 am
1 stop22h 10m
$427
AtlantaOttawa
ATL Atlanta Hartsfield-Jackson - YOW Ottawa
ATLYOW
Atlanta Hartsfield-Jackson
Fri 10/9
8:15 am-7:20 pm
1 stop11h 05m
Ottawa
Mon 10/12
7:00 am-12:06 am
2 stops17h 06m
$439
AtlantaOttawa
ATL Atlanta Hartsfield-Jackson - YOW Ottawa
ATLYOW
Atlanta Hartsfield-Jackson
Fri 10/9
8:15 am-5:35 am
2 stops21h 20m
Ottawa
Mon 10/12
4:15 pm-6:55 am
2 stops14h 40m
$447
AtlantaToronto
ATL Atlanta Hartsfield-Jackson - YTZ Toronto Island
ATLYTZ
Atlanta Hartsfield-Jackson
Thu 10/22
5:40 am-6:56 pm
1 stop13h 16m
Toronto Island
Mon 10/26
3:15 pm-10:18 am
1 stop19h 03m
$523
AtlantaToronto
ATL Atlanta Hartsfield-Jackson - YTZ Toronto Island
ATLYTZ
Atlanta Hartsfield-Jackson
Mon 10/19
9:50 am-6:56 pm
1 stop9h 06m
Toronto Island
Sat 10/24
3:15 pm-12:23 am
1 stop9h 08m
$534
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Atlanta to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Atlanta with our price prediction graph.
ATL-YOW
ATL-YYZ
ATL-YTZ
ATL-YUL
ATL-YSB
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Atlanta to Ontario
ATL-CAON
ATL-YOW
ATL-YYZ
ATL-YTZ
ATL-YUL
What is the cheapest month to book a flight from Atlanta to Region of Ontario?
Currently, November is the cheapest month in which you can book a flight from Atlanta to Region of Ontario (average of $557). Flying from Atlanta to Region of Ontario in July is currently the most expensive (average of $669). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ATL to ON?
Find hourly flight availability from Atlanta to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 26, 2026.
When flying from Atlanta to Region of Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 36% versus a flight in the morning.
Weekly flight availability from Atlanta to Region of Ontario
Explore weekly flight availability from Atlanta to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 26, 2026.
The most flights from ATL to CAON are scheduled on a Monday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).
How much does it cost to fly round-trip from Atlanta to Region of Ontario?
Airfare is below average for this route at the moment.
Atlanta to Region of Ontario flights typically cost between $320 and $792 in September.The cheapest round-trip price found within the last 5 days was $284 on Multiple Airlines (Sep 24-Sep 28).
How far ahead should I book a flight from Atlanta to Region of Ontario?
The best time to book flights from Atlanta to Region of Ontario is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Atlanta to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Atlanta to Ontario. Price data was last updated on August 22, 2026.
Travelers seeking maximum savings on their Atlanta to Region of Ontario flight should consider departing on Thursday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated August 26, 2026.
See what other customers who have flown with Delta,United Airlines, andWestJet from Atlanta to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Related info for your journey
Find useful and relevant information for your journey from Atlanta to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Atlanta to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Atlanta to Ontario by cabin class
Find flights from Atlanta to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Atlanta and Ontario flights
Browse other Atlanta and Ontario flight options. Last updated on August 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Atlanta to Ontario
Discover the top 4 airlines that operate flights from Atlanta to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$186 | Average$556 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$261 | Average$613 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$582 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$317 | Average$696 | FlexibilityNo cancel fee | On-time60% |