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$58+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — YYZ
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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Find flight deals from Atlanta to Ontario

Cheapest flights from Atlanta to Ontario
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 November 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/39:04 amATL - YUL
2 stops13h 16mMultiple Airlines
Mon 12/88:00 amYUL - ATL
1 stop25h 59mMultiple Airlines
Deal found 11/15$233
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/611:01 amATL - YUL
2 stops11h 24mMultiple Airlines
Mon 12/88:00 amYUL - ATL
1 stop25h 59mMultiple Airlines
Deal found 11/15$238
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/29:23 amATL - YUL
2 stops12h 57mMultiple Airlines
Mon 12/88:00 amYUL - ATL
1 stop25h 59mMultiple Airlines
Deal found 11/15$239
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/29:23 amATL - YUL
2 stops12h 57mMultiple Airlines
Sun 12/78:00 amYUL - ATL
1 stop23h 48mMultiple Airlines
Deal found 11/15$245
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/58:39 amATL - YUL
2 stops13h 46mMultiple Airlines
Mon 12/88:00 amYUL - ATL
1 stop25h 59mMultiple Airlines
Deal found 11/15$249
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/15:45 amATL - YUL
2 stops16h 40mMultiple Airlines
Mon 12/88:00 amYUL - ATL
1 stop13h 34mMultiple Airlines
Deal found 11/15$256
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/49:57 pmATL - YOW
1 stop19h 28mMultiple Airlines
Tue 12/94:15 pmYOW - ATL
1 stop17h 44mMultiple Airlines
Deal found 11/17$257
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/64:20 pmATL - YUL
1 stop8h 10mMultiple Airlines
Sun 12/78:00 amYUL - ATL
1 stop23h 48mMultiple Airlines
Deal found 11/15$259
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 12/119:01 amATL - YUL
1 stop7h 22mMultiple Airlines
Sun 12/145:25 pmYUL - ATL
2 stops14h 23mMultiple Airlines
Deal found 11/16$262
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/39:04 amATL - YUL
2 stops13h 16mMultiple Airlines
Tue 12/95:10 pmYUL - ATL
1 stop7h 27mMultiple Airlines
Deal found 11/15$265
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/19:25 pmATL - YYZ
2 stops22h 48mMultiple Airlines
Wed 12/109:35 amYYZ - ATL
1 stop7h 51mMultiple Airlines
Deal found 11/15$268
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 12/115:30 amATL - YYZ
1 stop9h 10mMultiple Airlines
Sun 12/148:30 pmYYZ - ATL
1 stop11h 18mMultiple Airlines
Deal found 11/16$269

Cheap flight deals from Atlanta to Ontario

Keep the following information in mind while searching for Atlanta to Ontario flight deals. Data was last updated November 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$233
(Kiwi.com)

One-way from

$58
(Trip.com)

Popular in

August

Cheapest in

January

Average price

$600

Good round-trip deal

$458 or less

Good one-way deal

$240 or less
Provider with most accurate pricing for Atlanta Hartsfield-Jackson-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Atlanta Hartsfield-Jackson-Toronto (YTO) flights.
Search Deals
From Atlanta Hartsfield-Jackson to Ontario
Search Deals
One-way flight from Atlanta Hartsfield-Jackson to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Atlanta Hartsfield-Jackson to Ontario.
Search Deals
Price to beat on a one-way flight from Atlanta Hartsfield-Jackson to Ontario.
Search Deals

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 2,558,603 searches. Data last updated November 17, 2025.
Use the filters below to find and compare flights from Atlanta to Ontario that are best for you.

Fly from

Atlanta

Fly to

Ontario

Route

Depart

Return

Price

AtlantaOttawa

ATL - YOW

ATLYOW

Atlanta Hartsfield-Jackson

Wed 1/7

2:29 pm-12:25 am

1 stop9h 56m

Ottawa

Sun 1/11

4:20 pm-7:16 pm

3 stops26h 56m

$242

AtlantaOttawa

ATL - YOW

ATLYOW

Atlanta Hartsfield-Jackson

Thu 12/4

9:57 pm-5:25 pm

1 stop19h 28m

Ottawa

Tue 12/9

4:15 pm-9:59 am

1 stop17h 44m

$257

AtlantaMontreal

ATL - YUL

ATLYUL

Atlanta Hartsfield-Jackson

Sat 12/6

4:20 pm-12:30 am

1 stop8h 10m

Montreal Pierre Elliott Trudeau Intl

Sun 12/7

8:00 am-7:48 am

1 stop23h 48m

$259

AtlantaToronto

ATL - YYZ

ATLYYZ

Atlanta Hartsfield-Jackson

Mon 12/1

9:25 pm-8:13 pm

2 stops22h 48m

Toronto Pearson Intl

Wed 12/10

9:35 am-5:26 pm

1 stop7h 51m

$268

AtlantaMontreal

ATL - YUL

ATLYUL

Atlanta Hartsfield-Jackson

Tue 12/2

9:04 am-10:20 pm

2 stops13h 16m

Montreal Pierre Elliott Trudeau Intl

Tue 12/9

5:10 pm-12:37 am

1 stop7h 27m

$271

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Thu 12/11

9:01 am-7:50 pm

2 stops10h 49m

Toronto Island

Sun 12/14

7:40 pm-7:44 am

1 stop12h 04m

$272

AtlantaOttawa

ATL - YOW

ATLYOW

Atlanta Hartsfield-Jackson

Fri 11/28

10:59 pm-5:13 pm

1 stop18h 14m

Ottawa

Mon 12/1

7:00 am-12:07 am

1 stop17h 07m

$278

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Sat 12/6

6:21 pm-3:58 pm

2 stops21h 37m

Toronto Island

Tue 12/9

6:15 pm-12:37 am

1 stop6h 22m

$280

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Thu 1/1

9:47 am-8:00 pm

1 stop10h 13m

Toronto Island

Thu 1/8

2:05 pm-7:07 am

2 stops17h 02m

$282

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Fri 12/12

9:01 am-10:03 pm

2 stops13h 02m

Toronto Island

Tue 12/16

7:40 pm-1:06 am

1 stop5h 26m

$290

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 60 results
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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.
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

What is the cheapest month to book a flight from Atlanta to Region of Ontario?

Currently, June is the cheapest month in which you can book a flight from Atlanta to Region of Ontario (average of $99). Flying from Atlanta to Region of Ontario in October is currently the most expensive (average of $320). 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 November 17, 2025.

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 16% versus a flight in the morning.

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 December 16, 2024.

Travelers seeking maximum savings on their Atlanta to Region of Ontario flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 17, 2025.

The most flights from ATL to CAON are scheduled on a Thursday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

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 November 17, 2025.
See what other customers who have flown with Delta, United Airlines, and WestJet 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.
Delta
7.9
Good
8,006 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Delta
7.9
Good
8,006 reviews
Delta
7.9
Good
8,006 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
United Airlines
7.4
Good
9,014 reviews
Delta
7.9
Good
8,006 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
WestJet
7.2
Good
3,163 reviews
Delta
7.9
Good
8,006 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Air Canada
7.1
Good
10,457 reviews
Delta
7.9
Good
8,006 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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.

  • What airport do you fly from for flights from Atlanta to Ontario?

    Most people fly from Atlanta Hartsfield-Jackson (ATL) if they book a flight from Atlanta to Ontario. Atlanta Hartsfield-Jackson is conveniently located just 8.2 mi from Atlanta’s city center.

  • How long is the flight from Atlanta to Region of Ontario?

    There are many flights that can get you from Atlanta to Region of Ontario in 10h 51m. Fly via WestJet to get the fastest option. The distance from Atlanta to Region of Ontario is about 740 mi.

  • What are the most popular routes from Atlanta to Region of Ontario?

    Most travelers choose Atlanta Hartsfield-Jackson - Toronto Pearson Intl, Atlanta Hartsfield-Jackson - Montreal Pierre Elliott Trudeau Intl or Atlanta Hartsfield-Jackson - Toronto Island when deciding on the best route from Atlanta to Region of Ontario.

  • What are the most reliable airlines from Atlanta to Region of Ontario?

    Before booking your flight to Region of Ontario from Atlanta, check out the most reliable airlines to get you to your destination on time: Atlas Air (100%), TAP AIR PORTUGAL (93%), Jazz( 92%).

  • What are the cheapest flights from Atlanta to Region of Ontario?

    Looking at all options, your cheapest flight can be booked for $134. While the most popular route (Atlanta Hartsfield-Jackson - Toronto Pearson Intl) can be booked for $196 on average, our data indicates $1,042 when flying from Atlanta to Region of Ontario.

  • Can I find deals for flights from Atlanta to Ontario that include hotel bookings?

    Yes. In addition to deals on Atlanta to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Atlanta to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Atlanta to Ontario.

  • Can I find deals for business class flights from Atlanta to Ontario?

    Yes. Cheapflights offers flight deals from Atlanta to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Atlanta to Region of Ontario?

    Currently, June is the cheapest month in which you can book a flight from Atlanta to Region of Ontario (average of $99). Flying from Atlanta to Region of Ontario in October is currently the most expensive (average of $320). 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.

See more FAQs

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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.
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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 2,558,603 searches. Data last updated November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$240Average$666FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$247Average$691FlexibilityNo cancel feeOn-time69%
DeltaCheapest$260Average$599FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$265Average$541FlexibilityNo cancel feeOn-time60%

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