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Cheap flights from Ontario to Atlanta from $63

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 2/14. 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
7:15 am - 5:30 am
ONT
-
ATL
19h 15m1 stop
Frontier Logo
8:00 pm - 11:59 pm
ATL
-
ONT
6h 59m1 stop
$247Frontier
Wed, Jan 14 - Fri, Jan 16
Frontier Logo
5:10 pm - 9:20 am
ONT
-
ATL
13h 10m1 stop
Frontier Logo
1:58 pm - 9:03 pm
ATL
-
ONT
10h 05m1 stop
$251Frontier
Thu, Mar 12 - Sat, Mar 14
Frontier Logo
7:19 pm - 5:57 am
ONT
-
ATL
7h 38m1 stop
Frontier Logo
8:04 pm - 12:20 am
ATL
-
ONT
7h 16m1 stop
$252Frontier
Sun, Jan 11 - Fri, Jan 23
Frontier Logo
6:07 pm - 1:02 pm
ONT
-
ATL
15h 55m1 stop
Frontier Logo
2:12 pm - 11:21 pm
ATL
-
ONT
12h 09m1 stop
$253Frontier
Thu, Dec 25 - Sat, Jan 3
Frontier Logo
6:17 pm - 5:30 am
ONT
-
ATL
8h 13m1 stop
Frontier Logo
6:40 am - 3:21 pm
ATL
-
ONT
11h 41m1 stop
$254Frontier
Tue, Dec 23 - Thu, Jan 1
Frontier Logo
6:17 pm - 1:02 pm
ONT
-
ATL
15h 45m1 stop
Frontier Logo
6:40 am - 3:21 pm
ATL
-
ONT
11h 41m1 stop
$255Frontier
Thu, Dec 18 - Thu, Jan 1
Frontier Logo
10:12 pm - 7:20 am
ONT
-
ATL
30h 08m1 stop
Frontier Logo
10:43 am - 10:12 pm
ATL
-
ONT
14h 29m1 stop
$266Frontier
Fri, Jan 2 - Tue, Jan 6
Frontier Logo
9:48 am - 9:18 pm
ONT
-
ATL
8h 30m1 stop
Frontier Logo
8:00 pm - 11:56 pm
ATL
-
ONT
6h 56m1 stop
$268Frontier
Thu, Dec 25 - Sun, Jan 11
Frontier Logo
6:20 pm - 9:30 pm
ONT
-
ATL
24h 10m1 stop
Frontier Logo
7:00 am - 3:09 pm
ATL
-
ONT
11h 09m1 stop
$271Frontier
Mon, Dec 29 - Tue, Jan 6
Frontier Logo
3:21 pm - 5:57 am
ONT
-
ATL
11h 36m1 stop
Frontier Logo
8:00 pm - 11:59 pm
ATL
-
ONT
6h 59m1 stop
$272Frontier
Sat, Jan 10 - Fri, Jan 16

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Feb 14
ONT6:00 amOntario
20h 17m
1 stop
ATL5:17 amAtlanta Hartsfield-Jackson
Feb 22
ATL2:31 pmAtlanta Hartsfield-Jackson
10h 02m
1 stop
ONT9:33 pmOntario
$237
Find similar
Frontier
Jan 16
ONT6:39 pmOntario
9h 33m
1 stop
ATL7:12 amAtlanta Hartsfield-Jackson
Jan 24
ATL9:04 pmAtlanta Hartsfield-Jackson
15h 14m
1 stop
ONT9:18 amOntario
$244
Find similar
Frontier
Jan 14
ONT7:15 amOntario
19h 15m
1 stop
ATL5:30 amAtlanta Hartsfield-Jackson
Jan 16
ATL8:00 pmAtlanta Hartsfield-Jackson
6h 59m
1 stop
ONT11:59 pmOntario
$247
Find similar

Alaska Airlines flights from Ontario to Atlanta

Our best Alaska Airlines deals on Ontario to Atlanta flight tickets
Alaska Airlines
Jan 13
ONT4:03 pmOntario
20h 44m
1 stop
ATL3:47 pmAtlanta Hartsfield-Jackson
Jan 23
ATL7:50 amAtlanta Hartsfield-Jackson
19h 06m
1 stop
ONT11:56 pmOntario
$306
Find similar
Alaska Airlines
Feb 15
ONT6:14 amOntario
20h 29m
1 stop
ATL5:43 amAtlanta Hartsfield-Jackson
Feb 20
ATL7:04 amAtlanta Hartsfield-Jackson
31h 04m
1 stop
ONT11:08 amOntario
$325
Find similar
Alaska Airlines
Jan 16
ONT4:03 pmOntario
20h 44m
1 stop
ATL3:47 pmAtlanta Hartsfield-Jackson
Jan 18
ATL7:50 amAtlanta Hartsfield-Jackson
19h 06m
1 stop
ONT11:56 pmOntario
$326
Find similar

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 December 15, 2025.
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

Wed 1/14

7:15 am-5:30 am

1 stop19h 15m

Atlanta Hartsfield-Jackson

Fri 1/16

8:00 pm-11:59 pm

1 stop6h 59m

$247

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 3/12

5:10 pm-9:20 am

1 stop13h 10m

Atlanta Hartsfield-Jackson

Sat 3/14

1:58 pm-9:03 pm

1 stop10h 05m

$251

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sun 1/11

7:19 pm-5:57 am

1 stop7h 38m

Atlanta Hartsfield-Jackson

Fri 1/23

8:04 pm-12:20 am

1 stop7h 16m

$252

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 12/25

6:07 pm-1:02 pm

1 stop15h 55m

Atlanta Hartsfield-Jackson

Sat 1/3

2:12 pm-11:21 pm

1 stop12h 09m

$253

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 12/23

6:17 pm-5:30 am

1 stop8h 13m

Atlanta Hartsfield-Jackson

Thu 1/1

6:40 am-3:21 pm

1 stop11h 41m

$254

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 12/18

6:17 pm-1:02 pm

1 stop15h 45m

Atlanta Hartsfield-Jackson

Thu 1/1

6:40 am-3:21 pm

1 stop11h 41m

$255

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 1/2

10:12 pm-7:20 am

1 stop30h 08m

Atlanta Hartsfield-Jackson

Tue 1/6

10:43 am-10:12 pm

1 stop14h 29m

$266

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 12/25

9:48 am-9:18 pm

1 stop8h 30m

Atlanta Hartsfield-Jackson

Sun 1/11

8:00 pm-11:56 pm

1 stop6h 56m

$268

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 12/29

6:20 pm-9:30 pm

1 stop24h 10m

Atlanta Hartsfield-Jackson

Tue 1/6

7:00 am-3:09 pm

1 stop11h 09m

$271

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 1/10

3:21 pm-5:57 am

1 stop11h 36m

Atlanta Hartsfield-Jackson

Fri 1/16

8:00 pm-11:59 pm

1 stop6h 59m

$272

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 September is also cheap. Prices for this month can be found on momondo for an average of $394.

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 $347. 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 $431.

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 $300. Flights to Atlanta are more costly in the morning, with an average ticket price of $427. 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 $408 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 $331 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 December 2025, prices for Ontario to Atlanta flights are approximately 1% 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

$198

Fastest flight time

4h 04m

Direct flights

Every day

Airports in Atlanta

1 airport
The best one-way flight to Atlanta from Ontario in the past 72 hours is $198. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $424.
The fastest flight from Ontario to Atlanta takes 4h 04m
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 04m, 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 $79Free CancellationRating
6.3
8,187 reviews
Search Spirit Airlines flights
FrontierPriceFrom $147Free CancellationRating
5.8
3,080 reviews
Search Frontier flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $286Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
DeltaPriceFrom $317Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $330Free CancellationRating
7.9
4,249 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 15 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $529, but momondo users have found Delta deals from Ontario to Atlanta from as low as $317 round-trip. Delta has been scored 7.9/10 in 8,008 reviews.

Traveling to a place near Atlanta?

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

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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