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Cheap flights from Ontario to Atlanta from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Atlanta departing on 3/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Atlanta

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:21 am - 9:30 am
ONT
-
ATL
22h 09m
1 stop
Frontier Logo
10:59 am - 11:59 pm
ATL
-
ONT
16h 00m
1 stop
$141Frontier
Sat, Feb 14 - Sat, Feb 21
Frontier Logo
6:05 am - 6:15 am
ONT
-
ATL
21h 10m
1 stop
Frontier Logo
6:00 am - 9:34 pm
ATL
-
ONT
18h 34m
1 stop
$144Frontier
Thu, Feb 19 - Wed, Feb 25
Frontier Logo
3:22 pm - 7:02 am
ONT
-
ATL
12h 40m
1 stop
Frontier Logo
7:55 pm - 9:34 am
ATL
-
ONT
16h 39m
1 stop
$148Frontier
Tue, Feb 24 - Wed, Feb 25
Frontier Logo
3:22 pm - 2:28 pm
ONT
-
ATL
20h 06m
1 stop
Frontier Logo
10:59 am - 7:59 am
ATL
-
ONT
24h 00m
1 stop
$149Frontier
Tue, Feb 10 - Sat, Feb 21
Frontier Logo
7:17 pm - 7:03 am
ONT
-
ATL
8h 46m
1 stop
Frontier Logo
9:10 pm - 7:26 am
ATL
-
ONT
13h 16m
1 stop
$155Frontier
Wed, Feb 25 - Fri, Feb 27
Frontier Logo
3:22 pm - 6:45 am
ONT
-
ATL
12h 23m
1 stop
Frontier Logo
8:50 pm - 6:27 pm
ATL
-
ONT
24h 37m
1 stop
$159Frontier
Tue, Feb 10 - Wed, Feb 18
Frontier Logo
3:22 pm - 7:03 am
ONT
-
ATL
12h 41m
1 stop
Frontier Logo
7:53 pm - 11:59 pm
ATL
-
ONT
7h 06m
1 stop
$164Frontier
Wed, Feb 11 - Sat, Feb 21
Frontier Logo
3:07 pm - 7:03 am
ONT
-
ATL
12h 56m
1 stop
Frontier Logo
8:59 pm - 9:23 am
ATL
-
ONT
15h 24m
1 stop
$165Frontier
Tue, Feb 3 - Sat, Feb 7
Frontier Logo
7:22 pm - 10:57 pm
ONT
-
ATL
48h 35m
2 stops
Frontier Logo
6:00 am - 9:34 pm
ATL
-
ONT
18h 34m
1 stop
$166Frontier
Thu, Feb 19 - Wed, Feb 25
Frontier Logo
7:35 pm - 7:03 am
ONT
-
ATL
8h 28m
1 stop
Frontier Logo
8:52 pm - 1:52 pm
ATL
-
ONT
20h 00m
1 stop
$171Frontier
Sat, Jan 31 - Tue, Feb 10

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Feb 14
ONT8:21 amOntario
22h 09m
1 stop
ATL9:30 amAtlanta Hartsfield-Jackson
Feb 21
ATL10:59 amAtlanta Hartsfield-Jackson
16h 00m
1 stop
ONT11:59 pmOntario
$141
Frontier
Feb 19
ONT6:05 amOntario
21h 10m
1 stop
ATL6:15 amAtlanta Hartsfield-Jackson
Feb 25
ATL6:00 amAtlanta Hartsfield-Jackson
18h 34m
1 stop
ONT9:34 pmOntario
$144
Frontier
Feb 24
ONT3:22 pmOntario
12h 40m
1 stop
ATL7:02 amAtlanta Hartsfield-Jackson
Feb 25
ATL7:55 pmAtlanta Hartsfield-Jackson
16h 39m
1 stop
ONT9:34 amOntario
$148

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Atlanta 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, momondo users made 832,500 searches. Data last updated January 18, 2026.
Use the filters below to find and compare flights from Ontario to Atlanta that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 2/14

8:21 am-9:30 am

1 stop22h 09m

Atlanta Hartsfield-Jackson

Sat 2/21

10:59 am-11:59 pm

1 stop16h 00m

$141

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 2/19

6:05 am-6:15 am

1 stop21h 10m

Atlanta Hartsfield-Jackson

Wed 2/25

6:00 am-9:34 pm

1 stop18h 34m

$144

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 2/24

3:22 pm-7:02 am

1 stop12h 40m

Atlanta Hartsfield-Jackson

Wed 2/25

7:55 pm-9:34 am

1 stop16h 39m

$148

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 2/10

3:22 pm-2:28 pm

1 stop20h 06m

Atlanta Hartsfield-Jackson

Sat 2/21

10:59 am-7:59 am

1 stop24h 00m

$149

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 2/25

7:17 pm-7:03 am

1 stop8h 46m

Atlanta Hartsfield-Jackson

Fri 2/27

9:10 pm-7:26 am

1 stop13h 16m

$155

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 2/10

3:22 pm-6:45 am

1 stop12h 23m

Atlanta Hartsfield-Jackson

Wed 2/18

8:50 pm-6:27 pm

1 stop24h 37m

$159

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 2/11

3:22 pm-7:03 am

1 stop12h 41m

Atlanta Hartsfield-Jackson

Sat 2/21

7:53 pm-11:59 pm

1 stop7h 06m

$164

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 2/3

3:07 pm-7:03 am

1 stop12h 56m

Atlanta Hartsfield-Jackson

Sat 2/7

8:59 pm-9:23 am

1 stop15h 24m

$165

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 2/19

7:22 pm-10:57 pm

2 stops48h 35m

Atlanta Hartsfield-Jackson

Wed 2/25

6:00 am-9:34 pm

1 stop18h 34m

$166

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 1/31

7:35 pm-7:03 am

1 stop8h 28m

Atlanta Hartsfield-Jackson

Tue 2/10

8:52 pm-1:52 pm

1 stop20h 00m

$171

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Atlanta from

How to get the cheapest flight ticket from Ontario to Atlanta

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Atlanta?

The month of April is, on average, the cheapest month to fly to Atlanta from Ontario, with most prices found around $355. If you aren’t able to travel to Atlanta during the month of April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $399.

What is the cheapest day to depart on your flight to Atlanta?

Our data shows that Wednesday is the least expensive day to fly to Atlanta. Tickets to fly out on this day can be as low as $345. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Atlanta on Sunday is $436.

What is the cheapest time of day to depart on your flight to Atlanta?

The cheapest time of day to fly to Atlanta is in the evening when flights can be purchased for as low as $305. Flights to Atlanta are more costly in the morning, with an average ticket price of $424. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ontario to Atlanta Hartsfield-Jackson flight route?

Fly from Ontario to Atlanta Hartsfield-Jackson for the best Ontario - Atlanta Hartsfield-Jackson flight prices

How far in advance should I book a flight to Atlanta?

You are more likely to see cheaper flights to Atlanta from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Atlanta for around $406 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Atlanta from Ontario for as low as $320 on momondo.

What cabin class options are available on Ontario to Atlanta Hartsfield-Jackson flights?

There are 4 cabin classes available to choose from on Ontario to Atlanta Hartsfield-Jackson flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Ontario to Atlanta flight prices changed over time?

As of January 2026, prices for Ontario to Atlanta flights are approximately 12% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Atlanta

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Atlanta according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Atlanta (ONT to ATL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Atlanta

Best Price Found

$266

Fastest flight time

4h 03m

Direct flights

Every day

Airports in Atlanta

1 airport
The best one-way flight to Atlanta from Ontario in the past 72 hours is $266. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $386.
The fastest flight from Ontario to Atlanta takes 4h 03m
Direct flights go from Ontario to Atlanta every day.
There is 1 airport in Atlanta. From Ontario there are direct flights to Atlanta Hartsfield-Jackson (ATL).
Search flight deals

  • How far is Ontario to Atlanta Hartsfield-Jackson by plane?

    A flight from Ontario to Atlanta Hartsfield-Jackson will travel around 1897.6 mi. Flights usually cover this in 4h 03m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Atlanta Hartsfield-Jackson Airport?

    Prices for flights from Ontario Airport to Atlanta Hartsfield-Jackson Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Atlanta Hartsfield-Jackson Airport?

  • How old do you have to be to fly from Ontario Airport to Atlanta Hartsfield-Jackson Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Atlanta Hartsfield-Jackson Airport.

  • What documentation or ID do you need to fly to Atlanta Hartsfield-Jackson Airport?

    The required travel and health documents for your Atlanta Hartsfield-Jackson Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Atlanta Hartsfield-Jackson Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Atlanta?

  • What is the most popular airline from Ontario to Atlanta?

Best airlines flying from Ontario to Atlanta

Compare and see reviews for airlines that fly from Ontario to Atlanta with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $67Free CancellationRating
6.3
8,340 reviews
Search Spirit Airlines flights
FrontierPriceFrom $147Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
American AirlinesPriceFrom $190Free CancellationRating
7.2
11,156 reviews
Search American Airlines flights
United AirlinesPriceFrom $286Free CancellationRating
7.4
9,176 reviews
Search United Airlines flights
DeltaPriceFrom $319Free CancellationRating
7.9
8,075 reviews
Search Delta flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,261 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 13 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $523, but momondo users have found Delta deals from Ontario to Atlanta from as low as $319 round-trip. Delta has been scored 7.9/10 in 8,075 reviews.

Traveling to a place near Atlanta?

Book flights to Atlanta if you plan to visit one of these locations
Helen
Marietta
Duluth
McDonough
Blue Ridge
Warner Robins
Stone Mountain
Lawrenceville
Cartersville
Covington
Dahlonega
Norcross
Auburn
Gadsden
Kennesaw
Conyers
Newnan
La Grange
Lithonia
Douglasville

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Atlanta?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Atlanta. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Atlanta with flexible booking policies on momondo?

momondo does allow users to show only those flights to Atlanta from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Atlanta?

momondo provides multiple filters to help you find the best flight to Atlanta from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Atlanta right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Atlanta, momondo offers a useful price alert feature which will track prices for flights to Atlanta from Ontario and alert you when they change.

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