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Cheap flights from Ontario to Atlanta from $54

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 4/14. 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
8:35 am - 6:46 pm
ONT
-
ATL
7h 11m
1 stop
Frontier Logo
6:00 am - 3:05 pm
ATL
-
ONT
12h 05m
1 stop
$190Frontier
Tue, Feb 24 - Tue, Mar 10
Multiple Airlines Logo
3:22 pm - 10:24 am
ONT
-
ATL
16h 02m
2 stops
Multiple Airlines Logo
7:55 pm - 11:59 pm
ATL
-
ONT
7h 04m
1 stop
$191Multiple Airlines
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
6:00 am - 5:25 am
ONT
-
ATL
20h 25m
1 stop
Frontier Logo
9:00 pm - 10:59 pm
ATL
-
ONT
28h 59m
1 stop
$192Frontier
Sat, Feb 28 - Sat, Mar 7
Frontier Logo
6:15 am - 5:01 am
ONT
-
ATL
19h 46m
1 stop
Frontier Logo
3:17 pm - 3:57 pm
ATL
-
ONT
27h 40m
2 stops
$197Frontier
Tue, Mar 24 - Tue, Apr 7
Frontier Logo
5:33 pm - 5:11 am
ONT
-
ATL
8h 38m
1 stop
Frontier Logo
8:50 pm - 1:40 pm
ATL
-
ONT
19h 50m
1 stop
$198Frontier
Fri, Apr 24 - Mon, Apr 27
Frontier Logo
6:00 am - 5:17 am
ONT
-
ATL
20h 17m
1 stop
Frontier Logo
8:00 pm - 11:59 pm
ATL
-
ONT
6h 59m
1 stop
$199Frontier
Sat, Feb 21 - Thu, Feb 26
Frontier Logo
6:00 am - 6:46 pm
ONT
-
ATL
9h 46m
1 stop
Frontier Logo
7:45 am - 2:30 pm
ATL
-
ONT
9h 45m
1 stop
$200Frontier
Sat, Feb 28 - Mon, Mar 2
Frontier Logo
7:29 pm - 7:40 pm
ONT
-
ATL
21h 11m
1 stop
Frontier Logo
8:50 pm - 8:04 pm
ATL
-
ONT
26h 14m
1 stop
$201Frontier
Tue, Apr 21 - Sun, Apr 26
Frontier Logo
1:18 pm - 9:29 am
ONT
-
ATL
17h 11m
1 stop
Frontier Logo
9:09 pm - 1:52 pm
ATL
-
ONT
19h 43m
1 stop
$202Frontier
Fri, Feb 20 - Tue, Feb 24
Frontier Logo
6:00 am - 4:51 pm
ONT
-
ATL
7h 51m
1 stop
Frontier Logo
8:50 pm - 6:27 pm
ATL
-
ONT
24h 37m
1 stop
$203Frontier
Fri, Feb 27 - Wed, Mar 4

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Apr 13
ONT9:02 pmOntario
6h 52m
1 stop
ATL6:54 amAtlanta Hartsfield-Jackson
Apr 25
ATL5:37 pmAtlanta Hartsfield-Jackson
8h 05m
1 stop
ONT10:42 pmOntario
$190
Frontier
Feb 28
ONT6:00 amOntario
20h 25m
1 stop
ATL5:25 amAtlanta Hartsfield-Jackson
Mar 7
ATL9:00 pmAtlanta Hartsfield-Jackson
28h 59m
1 stop
ONT10:59 pmOntario
$192
Frontier
Mar 24
ONT6:15 amOntario
19h 46m
1 stop
ATL5:01 amAtlanta Hartsfield-Jackson
Apr 7
ATL3:17 pmAtlanta Hartsfield-Jackson
27h 40m
2 stops
ONT3:57 pmOntario
$197

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 February 8, 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

Tue 2/24

8:35 am-6:46 pm

1 stop7h 11m

Atlanta Hartsfield-Jackson

Tue 3/10

6:00 am-3:05 pm

1 stop12h 05m

$190

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 2/25

3:22 pm-10:24 am

2 stops16h 02m

Atlanta Hartsfield-Jackson

Sat 2/28

7:55 pm-11:59 pm

1 stop7h 04m

$191

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 2/28

6:00 am-5:25 am

1 stop20h 25m

Atlanta Hartsfield-Jackson

Sat 3/7

9:00 pm-10:59 pm

1 stop28h 59m

$192

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 3/24

6:15 am-5:01 am

1 stop19h 46m

Atlanta Hartsfield-Jackson

Tue 4/7

3:17 pm-3:57 pm

2 stops27h 40m

$197

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 4/24

5:33 pm-5:11 am

1 stop8h 38m

Atlanta Hartsfield-Jackson

Mon 4/27

8:50 pm-1:40 pm

1 stop19h 50m

$198

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 2/21

6:00 am-5:17 am

1 stop20h 17m

Atlanta Hartsfield-Jackson

Thu 2/26

8:00 pm-11:59 pm

1 stop6h 59m

$199

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 2/28

6:00 am-6:46 pm

1 stop9h 46m

Atlanta Hartsfield-Jackson

Mon 3/2

7:45 am-2:30 pm

1 stop9h 45m

$200

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 4/21

7:29 pm-7:40 pm

1 stop21h 11m

Atlanta Hartsfield-Jackson

Sun 4/26

8:50 pm-8:04 pm

1 stop26h 14m

$201

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 2/20

1:18 pm-9:29 am

1 stop17h 11m

Atlanta Hartsfield-Jackson

Tue 2/24

9:09 pm-1:52 pm

1 stop19h 43m

$202

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 2/27

6:00 am-4:51 pm

1 stop7h 51m

Atlanta Hartsfield-Jackson

Wed 3/4

8:50 pm-6:27 pm

1 stop24h 37m

$203

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 $360. 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 $346. 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 $446.

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 $308. 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 $412 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 $323 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 February 2026, prices for Ontario to Atlanta flights are approximately 20% 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

$227

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 $227. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $354.
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
8,430 reviews
Search Spirit Airlines flights
FrontierPriceFrom $148Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
American AirlinesPriceFrom $190Free CancellationRating
7.2
11,249 reviews
Search American Airlines flights
United AirlinesPriceFrom $286Free CancellationRating
7.4
9,254 reviews
Search United Airlines flights
DeltaPriceFrom $319Free CancellationRating
7.9
8,172 reviews
Search Delta flights
SouthwestPriceFrom $332Free CancellationRating
8.0
4,280 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 12 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $510, 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 8,174 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
Auburn
Dahlonega
Norcross
Gadsden
Conyers
Kennesaw
Newnan
Lithonia
Douglasville
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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