HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$153+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — YYZ
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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

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 June 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/19. 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 8/36:35 am
ATL
-
YYZ
2 stops13h 09m
Multiple Airlines
Mon 8/109:30 am
YYZ
-
ATL
1 stop10h 34m
Multiple Airlines
Deal found 6/19$317
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Sun 7/126:35 am
ATL
-
YYZ
1 stop8h 25m
Multiple Airlines
Tue 7/146:30 am
YYZ
-
ATL
1 stop7h 34m
Multiple Airlines
Deal found 6/18$319
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 9/99:13 pm
ATL
-
YYZ
1 stop16h 52m
Multiple Airlines
Wed 9/169:30 am
YYZ
-
ATL
1 stop14h 57m
Multiple Airlines
Deal found 6/18$320
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 9/119:13 pm
ATL
-
YYZ
1 stop16h 52m
Multiple Airlines
Fri 9/188:10 am
YYZ
-
ATL
1 stop12h 08m
Multiple Airlines
Deal found 6/20$321
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Mon 7/206:35 am
ATL
-
YYZ
2 stops10h 34m
Multiple Airlines
Thu 9/171:30 pm
YYZ
-
ATL
1 stop10h 57m
Multiple Airlines
Deal found 6/21$323
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 7/810:48 pm
ATL
-
YYZ
1 stop15h 17m
Multiple Airlines
Sun 7/127:30 am
YYZ
-
ATL
1 stop24h 53m
Multiple Airlines
Deal found 6/20$324
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Mon 7/206:35 am
ATL
-
YYZ
2 stops10h 34m
Multiple Airlines
Tue 9/229:30 am
YYZ
-
ATL
1 stop14h 57m
Multiple Airlines
Deal found 6/21$326
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 7/810:48 pm
ATL
-
YYZ
1 stop15h 17m
Multiple Airlines
Thu 7/166:30 am
YYZ
-
ATL
1 stop7h 34m
Multiple Airlines
Deal found 6/20$327
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Tue 7/216:35 am
ATL
-
YYZ
1 stop7h 30m
Multiple Airlines
Thu 9/171:30 pm
YYZ
-
ATL
1 stop10h 57m
Multiple Airlines
Deal found 6/21$328
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 9/159:00 pm
ATL
-
YTZ
1 stop12h 40m
Multiple Airlines
Mon 9/218:40 pm
YTZ
-
ATL
1 stop13h 43m
Multiple Airlines
Deal found 6/18$328
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 8/266:50 am
ATL
-
YYZ
1 stop10h 05m
Multiple Airlines
Sun 8/307:30 am
YYZ
-
ATL
1 stop14h 04m
Multiple Airlines
Deal found 6/18$329
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 7/206:35 am
ATL
-
YYZ
2 stops10h 34m
Multiple Airlines
Tue 7/286:30 am
YYZ
-
ATL
1 stop7h 34m
Multiple Airlines
Deal found 6/18$330

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(Kiwi.com)

One-way from

$153
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$624

Good round-trip deal

$654 or less

Good one-way deal

$329 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. 6% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 21, 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

Price

Cheapest round-trip

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Wed 7/15

5:05 am-7:19 pm

1 stop14h 14m

Toronto Island

Tue 7/21

1:40 pm-10:44 pm

1 stop9h 04m

$344

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Sat 8/29

5:50 am-5:20 pm

1 stop11h 30m

Toronto Island

Fri 9/4

6:00 pm-9:03 am

1 stop15h 03m

$349

AtlantaOttawa

ATL - YOW

ATLYOW

Atlanta Hartsfield-Jackson

Wed 7/15

5:05 am-5:03 pm

1 stop11h 58m

Ottawa

Sat 7/18

7:00 am-5:09 pm

1 stop10h 09m

$362

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Tue 7/7

9:03 pm-5:25 pm

1 stop20h 22m

Toronto Island

Sat 7/11

1:40 pm-10:44 pm

1 stop9h 04m

$374

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Tue 7/21

9:03 pm-12:35 pm

1 stop15h 32m

Toronto Island

Mon 7/27

8:50 am-3:13 pm

1 stop6h 23m

$374

AtlantaMontreal

ATL - YUL

ATLYUL

Atlanta Hartsfield-Jackson

Tue 7/7

10:40 pm-2:08 pm

1 stop15h 28m

Montreal Pierre Elliott Trudeau Intl

Tue 7/14

7:20 pm-2:53 pm

1 stop19h 33m

$379

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Thu 8/6

10:40 pm-8:00 am

1 stop9h 20m

Toronto Island

Tue 8/11

1:40 pm-10:44 pm

1 stop9h 04m

$380

AtlantaMontreal

ATL - YUL

ATLYUL

Atlanta Hartsfield-Jackson

Tue 7/7

10:40 pm-2:08 pm

1 stop15h 28m

Montreal Pierre Elliott Trudeau Intl

Mon 7/13

8:00 pm-9:17 am

1 stop13h 17m

$391

AtlantaToronto

ATL - YTZ

ATLYTZ

Atlanta Hartsfield-Jackson

Thu 7/2

10:40 pm-8:59 am

1 stop10h 19m

Toronto Island

Sat 7/4

8:55 am-9:47 pm

1 stop12h 52m

$468

AtlantaMontreal

ATL - YUL

ATLYUL

Atlanta Hartsfield-Jackson

Tue 9/1

10:40 pm-6:15 pm

1 stop19h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 9/7

7:00 am-9:43 am

Nonstop2h 43m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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, August is the cheapest month in which you can book a flight from Atlanta to Region of Ontario (average of $55). Flying from Atlanta to Region of Ontario in March is currently the most expensive (average of $247). 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 June 21, 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 June 21, 2026.

The most flights from ATL to CAON are scheduled on a Wednesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost to fly round-trip from Atlanta to Region of Ontario?

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 48 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 June 20, 2026.

Travelers seeking maximum savings on their Atlanta to Region of Ontario flight should consider departing on Monday 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 June 21, 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.
Delta
7.8
Good
8,422 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Delta
7.8
Good
8,422 reviews
Delta
7.8
Good
8,422 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
United Airlines
7.4
Good
9,866 reviews
Delta
7.8
Good
8,422 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
WestJet
7.2
Good
3,375 reviews
Delta
7.8
Good
8,422 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Air Canada
7.1
Good
11,229 reviews
Delta
7.8
Good
8,422 reviews

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.

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 6h 50m. Fly via Air Canada or Delta to get the fastest option. The distance from Atlanta to Region of Ontario is about 930 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Atlanta to Region of Ontario one-way?

    One-way options have recently been found by users for as low as $139 on American Airlines. Other airlines that offer cheap prices include United Airlines from $153 and WestJet from $169 one-way.

  • 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: Sun Country Air (100%), United Airlines (88%), LATAM Airlines( 86%).

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

    Looking at all options, your cheapest flight can be booked for $239. While the most popular route (Atlanta Hartsfield-Jackson - Toronto Pearson Intl) can be booked for $317 on average, our data indicates $1,155 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, August is the cheapest month in which you can book a flight from Atlanta to Region of Ontario (average of $55). Flying from Atlanta to Region of Ontario in March is currently the most expensive (average of $247). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$186Average$573FlexibilityNo cancel feeOn-time67%
DeltaCheapest$263Average$618FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$279Average$686FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$283Average$577FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.