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Cheap flights from Ontario to Atlanta from $89

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 9/11. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Atlanta

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:58 pm - 2:03 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
20h 05m1 stop Las Vegas Harry Reid Intl
Frontier Logo
9:23 pm - 7:59 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
25h 36m1 stop Las Vegas Harry Reid Intl
$306Frontier
Fri, Oct 23 - Sun, Oct 25
Frontier Logo
9:37 am - 7:50 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
7h 13m1 stop Dallas/Fort Worth
Frontier Logo
9:00 pm - 7:01 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
25h 01m1 stop Houston George Bush Intcntl
$309Frontier
Tue, Aug 25 - Tue, Sep 1
Multiple Airlines Logo
8:07 am - 7:31 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
8h 24m1 stop Dallas/Fort Worth
Multiple Airlines Logo
9:03 am - 6:00 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
11h 57m1 stop Seattle/Tacoma Intl
$328Multiple Airlines
Sat, Oct 24 - Mon, Oct 26
Multiple Airlines Logo
7:59 pm - 7:33 amONT  Ontario-ATL Atlanta Hartsfield-Jackson
8h 34m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
6:41 am - 10:30 amATL  Atlanta Hartsfield-Jackson-ONT Ontario
6h 49m1 stop Denver Intl
$333Multiple Airlines
Mon, Sep 21 - Sun, Sep 27
Southwest Logo
7:50 am - 7:30 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
8h 40m1 stop Austin Bergstrom
Southwest Logo
6:05 am - 9:20 amATL  Atlanta Hartsfield-Jackson-ONT Ontario
6h 15m1 stop Phoenix Sky Harbor Intl
$343Southwest
Fri, Dec 4 - Mon, Dec 7
Southwest Logo
8:35 am - 7:05 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
7h 30m2 stops Phoenix Sky Harbor Intl Dallas Love Field
Southwest Logo
2:05 pm - 8:05 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
9h 00m2 stops Austin Bergstrom Las Vegas Harry Reid Intl
$345Southwest
Wed, Sep 2 - Sat, Sep 5
American Airlines Logo
6:00 am - 7:21 pmONT  Ontario-ATL Atlanta Hartsfield-Jackson
10h 21m1 stop Dallas/Fort Worth
American Airlines Logo
12:38 pm - 8:09 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
10h 31m1 stop Dallas/Fort Worth
$425American Airlines
Sat, Sep 26 - Sat, Oct 3
American Airlines Logo
12:37 pm - 10:15 amONT  Ontario-ATL Atlanta Hartsfield-Jackson
18h 38m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 8:09 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
17h 09m1 stop Dallas/Fort Worth
$425American Airlines
Sat, Sep 26 - Sat, Oct 3
Delta Logo
11:10 pm - 6:09 amONT  Ontario-ATL Atlanta Hartsfield-Jackson
3h 59mnonstop
Delta Logo
9:25 am - 11:10 amATL  Atlanta Hartsfield-Jackson-ONT Ontario
4h 45mnonstop
$449Delta
Thu, Nov 12 - Wed, Nov 18
Delta Logo
11:15 pm - 6:22 amONT  Ontario-ATL Atlanta Hartsfield-Jackson
4h 07mnonstop
Delta Logo
8:20 pm - 9:54 pmATL  Atlanta Hartsfield-Jackson-ONT Ontario
4h 34mnonstop
$449Delta
Thu, Oct 15 - Mon, Oct 19

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Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Oct 23
ONT2:58 pmOntario
20h 05m
1 stop
ATL2:03 pmAtlanta Hartsfield-Jackson
Oct 25
ATL9:23 pmAtlanta Hartsfield-Jackson
25h 36m
1 stop
ONT7:59 pmOntario
$306
Frontier
Aug 25
ONT9:37 amOntario
7h 13m
1 stop
ATL7:50 pmAtlanta Hartsfield-Jackson
Sep 1
ATL9:00 pmAtlanta Hartsfield-Jackson
25h 01m
1 stop
ONT7:01 pmOntario
$309
Frontier
Sep 13
ONT11:45 amOntario
9h 25m
1 stop
ATL12:10 amAtlanta Hartsfield-Jackson
Sep 19
ATL7:59 pmAtlanta Hartsfield-Jackson
6h 48m
1 stop
ONT11:47 pmOntario
$310

Southwest flights from Ontario to Atlanta

Our best Southwest deals on Ontario to Atlanta flight tickets
Southwest
Sep 10
ONT11:00 amOntario
7h 45m
1 stop
ATL9:45 pmAtlanta Hartsfield-Jackson
Sep 12
ATL8:10 amAtlanta Hartsfield-Jackson
10h 05m
2 stops
ONT3:15 pmOntario
$352
Southwest
Oct 29
ONT12:40 pmOntario
8h 05m
2 stops
ATL11:45 pmAtlanta Hartsfield-Jackson
Nov 2
ATL5:15 pmAtlanta Hartsfield-Jackson
8h 40m
2 stops
ONT10:55 pmOntario
$357

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 August 10, 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 Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Fri 10/23

2:58 pm-2:03 pm

1 stop20h 05m

Atlanta Hartsfield-Jackson

Sun 10/25

9:23 pm-7:59 pm

1 stop25h 36m

$306

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Tue 8/25

9:37 am-7:50 pm

1 stop7h 13m

Atlanta Hartsfield-Jackson

Tue 9/1

9:00 pm-7:01 pm

1 stop25h 01m

$309

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Sat 10/24

8:07 am-7:31 pm

1 stop8h 24m

Atlanta Hartsfield-Jackson

Mon 10/26

9:03 am-6:00 pm

1 stop11h 57m

$328

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Mon 9/21

7:59 pm-7:33 am

1 stop8h 34m

Atlanta Hartsfield-Jackson

Sun 9/27

6:41 am-10:30 am

1 stop6h 49m

$333

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Fri 12/4

7:50 am-7:30 pm

1 stop8h 40m

Atlanta Hartsfield-Jackson

Mon 12/7

6:05 am-9:20 am

1 stop6h 15m

$343

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Wed 9/2

8:35 am-7:05 pm

2 stops7h 30m

Atlanta Hartsfield-Jackson

Sat 9/5

2:05 pm-8:05 pm

2 stops9h 00m

$345

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Sat 9/26

6:00 am-7:21 pm

1 stop10h 21m

Atlanta Hartsfield-Jackson

Sat 10/3

12:38 pm-8:09 pm

1 stop10h 31m

$425

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Sat 9/26

12:37 pm-10:15 am

1 stop18h 38m

Atlanta Hartsfield-Jackson

Sat 10/3

6:00 am-8:09 pm

1 stop17h 09m

$425

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Thu 11/12

11:10 pm-6:09 am

Nonstop3h 59m

Atlanta Hartsfield-Jackson

Wed 11/18

9:25 am-11:10 am

Nonstop4h 45m

$449
Quickest round-trip

OntarioAtlanta

ONT Ontario - ATL Atlanta Hartsfield-Jackson

ONTATL

Ontario

Thu 10/15

11:15 pm-6:22 am

Nonstop4h 07m

Atlanta Hartsfield-Jackson

Mon 10/19

8:20 pm-9:54 pm

Nonstop4h 34m

$449

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 typical price of a round-trip flight between Ontario and Atlanta?

Prices are currently typical for flights on this route.

Typical prices usually range from $258 to $489.
The lowest price recently found on this route was $297.

What is the cheapest month to fly to Atlanta?

The month of August is, on average, the cheapest month to fly to Atlanta from Ontario, with most prices found around $378. If you aren’t able to travel to Atlanta during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $383.

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 $422. 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 $545.

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 $322. Flights to Atlanta are more costly in the morning, with an average ticket price of $517. 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 from Ontario 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 $452 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 $390 on momondo.

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

There are 4 cabin classes available to choose from on Ontario to Atlanta 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 August 2026, prices for Ontario to Atlanta flights are approximately 3% 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

$272

Fastest flight time

4h 05m

Direct flights

Every day

Airports in Atlanta

1 airport
The best one-way flight to Atlanta from Ontario in the past 72 hours is $272. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $440.
The fastest flight from Ontario to Atlanta takes 4h 05m
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

Frequently asked questions about flying from Ontario to Atlanta

  • 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 05m, 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
FrontierPriceFrom $150Free CancellationRating
5.6
2,715 reviews
Search Frontier flights
American AirlinesPriceFrom $200Free CancellationRating
7.1
11,897 reviews
Search American Airlines flights
DeltaPriceFrom $322Free CancellationRating
7.8
8,497 reviews
Search Delta flights
SouthwestPriceFrom $340Free CancellationRating
8.0
4,214 reviews
Search Southwest flights
JetBluePriceFrom $378Free CancellationRating
7.1
3,030 reviews
Search JetBlue 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 $540, but momondo users have found Delta deals from Ontario to Atlanta from as low as $322 round-trip. Delta has been scored 7.8/10 in 8,497 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
Norcross
Cartersville
Lawrenceville
Douglasville
Kennesaw
College Park
Conyers
Covington
Gainesville
La Grange
Newnan
Dahlonega
Auburn

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.

An easier way to manage your Atlanta trip

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