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Cheap flights from Ontario to Atlanta from $79

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 4/15. 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.
Multiple Airlines Logo
11:47 am - 5:50 am
ONT
-
ATL
15h 03m
1 stop
Multiple Airlines Logo
5:40 pm - 11:43 pm
ATL
-
ONT
9h 03m
1 stop
$256Multiple Airlines
Thu, Apr 16 - Mon, Apr 27
Multiple Airlines Logo
5:33 pm - 6:22 pm
ONT
-
ATL
21h 49m
1 stop
Multiple Airlines Logo
9:21 pm - 11:49 pm
ATL
-
ONT
29h 28m
2 stops
$257Multiple Airlines
Fri, Apr 24 - Mon, May 18
Frontier Logo
8:59 pm - 11:33 am
ONT
-
ATL
11h 34m
2 stops
Frontier Logo
12:33 pm - 11:49 pm
ATL
-
ONT
14h 16m
1 stop
$258Frontier
Mon, May 4 - Wed, May 6
Frontier Logo
7:09 pm - 9:29 am
ONT
-
ATL
11h 20m
1 stop
Frontier Logo
6:00 am - 4:15 pm
ATL
-
ONT
13h 15m
1 stop
$259Frontier
Fri, Mar 27 - Mon, Mar 30
Frontier Logo
5:13 pm - 9:29 am
ONT
-
ATL
13h 16m
1 stop
Frontier Logo
6:00 am - 3:05 pm
ATL
-
ONT
12h 05m
1 stop
$260Frontier
Thu, Mar 26 - Tue, Mar 31
Frontier Logo
10:50 am - 3:09 pm
ONT
-
ATL
25h 19m
1 stop
Frontier Logo
4:55 pm - 11:06 am
ATL
-
ONT
21h 11m
1 stop
$261Frontier
Sat, May 16 - Sun, May 24
Frontier Logo
9:02 pm - 12:01 am
ONT
-
ATL
23h 59m
2 stops
Frontier Logo
10:13 am - 11:55 pm
ATL
-
ONT
16h 42m
1 stop
$262Frontier
Mon, Apr 13 - Mon, Apr 20
Frontier Logo
8:06 pm - 9:37 am
ONT
-
ATL
10h 31m
1 stop
Frontier Logo
10:46 am - 7:11 pm
ATL
-
ONT
11h 25m
1 stop
$263Frontier
Fri, May 22 - Wed, May 27
Frontier Logo
2:23 pm - 7:03 am
ONT
-
ATL
13h 40m
1 stop
Frontier Logo
3:20 pm - 4:38 pm
ATL
-
ONT
28h 18m
1 stop
$264Frontier
Tue, Mar 31 - Wed, Apr 15
Frontier Logo
7:09 pm - 9:29 am
ONT
-
ATL
11h 20m
1 stop
Frontier Logo
5:40 pm - 11:58 pm
ATL
-
ONT
9h 18m
1 stop
$265Frontier
Sun, Mar 29 - Fri, Apr 17

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
May 4
ONT8:59 pmOntario
11h 34m
2 stops
ATL11:33 amAtlanta Hartsfield-Jackson
May 6
ATL12:33 pmAtlanta Hartsfield-Jackson
14h 16m
1 stop
ONT11:49 pmOntario
$258
Frontier
Apr 10
ONT7:40 pmOntario
10h 53m
1 stop
ATL9:33 amAtlanta Hartsfield-Jackson
Apr 19
ATL8:50 pmAtlanta Hartsfield-Jackson
26h 14m
1 stop
ONT8:04 pmOntario
$259
Frontier
Apr 10
ONT6:20 amOntario
19h 51m
1 stop
ATL5:11 amAtlanta Hartsfield-Jackson
Apr 11
ATL3:19 pmAtlanta Hartsfield-Jackson
11h 37m
1 stop
ONT11:56 pmOntario
$260

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 March 23, 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

Cheapest round-trip

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 4/16

11:47 am-5:50 am

1 stop15h 03m

Atlanta Hartsfield-Jackson

Mon 4/27

5:40 pm-11:43 pm

1 stop9h 03m

$256

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 4/24

5:33 pm-6:22 pm

1 stop21h 49m

Atlanta Hartsfield-Jackson

Mon 5/18

9:21 pm-11:49 pm

2 stops29h 28m

$257

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 5/4

8:59 pm-11:33 am

2 stops11h 34m

Atlanta Hartsfield-Jackson

Wed 5/6

12:33 pm-11:49 pm

1 stop14h 16m

$258

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 3/27

7:09 pm-9:29 am

1 stop11h 20m

Atlanta Hartsfield-Jackson

Mon 3/30

6:00 am-4:15 pm

1 stop13h 15m

$259

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 3/26

5:13 pm-9:29 am

1 stop13h 16m

Atlanta Hartsfield-Jackson

Tue 3/31

6:00 am-3:05 pm

1 stop12h 05m

$260

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 5/16

10:50 am-3:09 pm

1 stop25h 19m

Atlanta Hartsfield-Jackson

Sun 5/24

4:55 pm-11:06 am

1 stop21h 11m

$261

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 4/13

9:02 pm-12:01 am

2 stops23h 59m

Atlanta Hartsfield-Jackson

Mon 4/20

10:13 am-11:55 pm

1 stop16h 42m

$262

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 5/22

8:06 pm-9:37 am

1 stop10h 31m

Atlanta Hartsfield-Jackson

Wed 5/27

10:46 am-7:11 pm

1 stop11h 25m

$263

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 3/31

2:23 pm-7:03 am

1 stop13h 40m

Atlanta Hartsfield-Jackson

Wed 4/15

3:20 pm-4:38 pm

1 stop28h 18m

$264
Quickest round-trip

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sun 3/29

7:09 pm-9:29 am

1 stop11h 20m

Atlanta Hartsfield-Jackson

Fri 4/17

5:40 pm-11:58 pm

1 stop9h 18m

$265

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 February is, on average, the cheapest month to fly to Atlanta from Ontario, with most prices found around $383. If you aren’t able to travel to Atlanta during the month of February, 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 Thursday is the least expensive day to fly to Atlanta. Tickets to fly out on this day can be as low as $360. 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 $455.

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

The cheapest time of day to fly to Atlanta is at noon when flights can be purchased for as low as $319. Flights to Atlanta are more costly in the morning, with an average ticket price of $441. 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 $350 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 March 2026, prices for Ontario to Atlanta flights are approximately 3% 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

$230

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 $230. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $419.
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 $79Free CancellationRating
6.3
8,538 reviews
Search Spirit Airlines flights
FrontierPriceFrom $150Free CancellationRating
5.7
3,019 reviews
Search Frontier flights
American AirlinesPriceFrom $286Free CancellationRating
7.1
11,488 reviews
Search American Airlines flights
DeltaPriceFrom $319Free CancellationRating
7.9
8,319 reviews
Search Delta flights
SouthwestPriceFrom $338Free CancellationRating
8.0
4,324 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 $501, 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 8,319 reviews.

Traveling to a place near Atlanta?

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