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Cheap flights from Ontario to Atlanta from $50

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 1/14. 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
6:15 am - 5:56 am
ONT
-
ATL
20h 41m1 stop
Frontier Logo
9:15 pm - 7:24 am
ATL
-
ONT
13h 09m1 stop
$241Frontier
Wed, Dec 17 - Sat, Dec 27
Frontier Logo
6:45 am - 7:47 pm
ONT
-
ATL
10h 02m1 stop
Frontier Logo
7:59 pm - 4:31 pm
ATL
-
ONT
23h 32m1 stop
$243Frontier
Thu, Dec 25 - Fri, Jan 2
Southwest Logo
10:40 am - 9:25 pm
ONT
-
ATL
7h 45m2 stops
Southwest Logo
6:50 am - 12:15 pm
ATL
-
ONT
8h 25m2 stops
$245Southwest
Wed, Feb 4 - Tue, Feb 10
Multiple Airlines Logo
6:15 am - 1:02 pm
ONT
-
ATL
27h 47m1 stop
Multiple Airlines Logo
9:01 am - 5:09 pm
ATL
-
ONT
35h 08m2 stops
$246Multiple Airlines
Tue, Dec 16 - Thu, Dec 18
Frontier Logo
3:20 pm - 6:13 am
ONT
-
ATL
11h 53m1 stop
Frontier Logo
8:07 pm - 5:42 pm
ATL
-
ONT
24h 35m1 stop
$249Frontier
Mon, Dec 15 - Sat, Jan 3
Multiple Airlines Logo
5:18 pm - 3:59 pm
ONT
-
ATL
19h 41m1 stop
Multiple Airlines Logo
11:05 am - 9:17 pm
ATL
-
ONT
13h 12m2 stops
$250Multiple Airlines
Sun, Dec 14 - Tue, Dec 16
Frontier Logo
6:20 pm - 9:18 am
ONT
-
ATL
11h 58m1 stop
Frontier Logo
9:15 pm - 5:09 pm
ATL
-
ONT
46h 54m2 stops
$251Frontier
Wed, Dec 24 - Wed, Dec 31
Frontier Logo
2:34 pm - 5:57 am
ONT
-
ATL
12h 23m1 stop
Frontier Logo
7:27 am - 1:39 pm
ATL
-
ONT
9h 12m1 stop
$252Frontier
Fri, Jan 9 - Sun, Jan 11
Frontier Logo
6:20 pm - 9:30 pm
ONT
-
ATL
24h 10m1 stop
Frontier Logo
8:07 pm - 9:27 pm
ATL
-
ONT
28h 20m1 stop
$253Frontier
Fri, Dec 19 - Sat, Jan 3
Frontier Logo
6:00 am - 6:13 am
ONT
-
ATL
21h 13m1 stop
Frontier Logo
10:35 am - 11:31 pm
ATL
-
ONT
15h 56m1 stop
$254Frontier
Wed, Mar 11 - Mon, Mar 16

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Dec 17
ONT6:15 amOntario
20h 41m
1 stop
ATL5:56 amAtlanta Hartsfield-Jackson
Dec 27
ATL9:15 pmAtlanta Hartsfield-Jackson
13h 09m
1 stop
ONT7:24 amOntario
$241
Find similar
Frontier
Dec 25
ONT6:45 amOntario
10h 02m
1 stop
ATL7:47 pmAtlanta Hartsfield-Jackson
Jan 2
ATL7:59 pmAtlanta Hartsfield-Jackson
23h 32m
1 stop
ONT4:31 pmOntario
$243
Find similar
Frontier
Dec 10
ONT6:15 amOntario
20h 42m
1 stop
ATL5:57 amAtlanta Hartsfield-Jackson
Dec 17
ATL11:48 amAtlanta Hartsfield-Jackson
12h 29m
1 stop
ONT9:17 pmOntario
$244
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 4, 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 12/17

6:15 am-5:56 am

1 stop20h 41m

Atlanta Hartsfield-Jackson

Sat 12/27

9:15 pm-7:24 am

1 stop13h 09m

$241

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 12/25

6:45 am-7:47 pm

1 stop10h 02m

Atlanta Hartsfield-Jackson

Fri 1/2

7:59 pm-4:31 pm

1 stop23h 32m

$243

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 2/4

10:40 am-9:25 pm

2 stops7h 45m

Atlanta Hartsfield-Jackson

Tue 2/10

6:50 am-12:15 pm

2 stops8h 25m

$245

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 12/16

6:15 am-1:02 pm

1 stop27h 47m

Atlanta Hartsfield-Jackson

Thu 12/18

9:01 am-5:09 pm

2 stops35h 08m

$246

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 12/15

3:20 pm-6:13 am

1 stop11h 53m

Atlanta Hartsfield-Jackson

Sat 1/3

8:07 pm-5:42 pm

1 stop24h 35m

$249

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sun 12/14

5:18 pm-3:59 pm

1 stop19h 41m

Atlanta Hartsfield-Jackson

Tue 12/16

11:05 am-9:17 pm

2 stops13h 12m

$250

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 12/24

6:20 pm-9:18 am

1 stop11h 58m

Atlanta Hartsfield-Jackson

Wed 12/31

9:15 pm-5:09 pm

2 stops46h 54m

$251

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 1/9

2:34 pm-5:57 am

1 stop12h 23m

Atlanta Hartsfield-Jackson

Sun 1/11

7:27 am-1:39 pm

1 stop9h 12m

$252

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 12/19

6:20 pm-9:30 pm

1 stop24h 10m

Atlanta Hartsfield-Jackson

Sat 1/3

8:07 pm-9:27 pm

1 stop28h 20m

$253

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 3/11

6:00 am-6:13 am

1 stop21h 13m

Atlanta Hartsfield-Jackson

Mon 3/16

10:35 am-11:31 pm

1 stop15h 56m

$254

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 $437.

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 $433. 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 $410 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 36% cheaper 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

$218

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 $218. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $390.
The fastest flight from Ontario to Atlanta takes 4h 04m
Direct flights go from Ontario to Atlanta every day.
There is 1 airport near Atlanta: 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 7h 45m, 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
8,161 reviews
Search Spirit Airlines flights
FrontierPriceFrom $148Free CancellationRating
5.8
3,092 reviews
Search Frontier flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
United AirlinesPriceFrom $286Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
DeltaPriceFrom $319Free CancellationRating
7.9
8,011 reviews
Search Delta flights
SouthwestPriceFrom $331Free CancellationRating
8.0
4,253 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 6 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $534, 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 8,011 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
Dahlonega
Stone Mountain
Covington
Cartersville
Norcross
Auburn
Gadsden
Conyers
Newnan
La Grange
Gainesville
Lithonia
Kennesaw

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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