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Cheap flights from Ontario to Atlanta from $81

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 10/30. 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

Frontier Logo
12:49 pm - 9:24 amONT-ATL
17h 35m1 stop
Frontier Logo
7:55 pm - 11:50 pmATL-ONT
6h 55m1 stop
$199Frontier
Find Deal
Sun, Oct 12 - Mon, Oct 13
Frontier Logo
7:30 pm - 6:07 amONT-ATL
7h 37m1 stop
Frontier Logo
3:14 pm - 8:56 pmATL-ONT
8h 42m1 stop
$201Frontier
Find Deal
Thu, Sep 25 - Mon, Sep 29
Frontier Logo
6:53 am - 8:16 amONT-ATL
22h 23m2 stops
Frontier Logo
7:30 am - 11:10 amATL-ONT
6h 40m1 stop
$203Frontier
Find Deal
Wed, Oct 29 - Mon, Nov 3
Frontier Logo
7:04 am - 6:02 amONT-ATL
19h 58m1 stop
Frontier Logo
6:35 am - 7:49 amATL-ONT
28h 14m1 stop
$204Frontier
Find Deal
Tue, Oct 7 - Sun, Oct 12
Frontier Logo
12:32 pm - 9:24 amONT-ATL
17h 52m1 stop
Frontier Logo
6:35 am - 7:49 amATL-ONT
28h 14m1 stop
$205Frontier
Find Deal
Thu, Oct 9 - Sun, Oct 12
Frontier Logo
6:53 am - 6:48 pmONT-ATL
8h 55m1 stop
Frontier Logo
7:58 pm - 7:47 amATL-ONT
14h 49m1 stop
$206Frontier
Find Deal
Wed, Oct 15 - Sun, Oct 19
Frontier Logo
7:30 pm - 6:07 amONT-ATL
7h 37m1 stop
Frontier Logo
7:56 pm - 7:17 amATL-ONT
14h 21m1 stop
$207Frontier
Find Deal
Thu, Sep 25 - Sun, Oct 5
Frontier Logo
12:32 pm - 9:24 amONT-ATL
17h 52m1 stop
Frontier Logo
8:13 pm - 8:42 pmATL-ONT
27h 29m1 stop
$208Frontier
Find Deal
Fri, Oct 17 - Mon, Oct 20
Logo
12:49 pm - 9:24 amONT-ATL
17h 35m1 stop
Logo
6:24 pm - 7:47 amATL-ONT
16h 23m2 stops
$223
Find Deal
Sun, Oct 12 - Sun, Oct 19
Logo
2:45 pm - 6:19 amONT-ATL
12h 34m2 stops
Logo
7:34 am - 7:54 pmATL-ONT
15h 20m1 stop
$225
Find Deal
Mon, Sep 29 - Sat, Oct 4

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Oct 12
ONT12:49 pmOntario
17h 35m
1 stop
ATL9:24 amAtlanta Hartsfield-Jackson
Oct 13
ATL7:55 pmAtlanta Hartsfield-Jackson
6h 55m
1 stop
ONT11:50 pmOntario
$199
Find similar
Frontier
Sep 25
ONT7:30 pmOntario
7h 37m
1 stop
ATL6:07 amAtlanta Hartsfield-Jackson
Sep 29
ATL3:14 pmAtlanta Hartsfield-Jackson
8h 42m
1 stop
ONT8:56 pmOntario
$201
Find similar
Frontier
Oct 29
ONT6:53 amOntario
22h 23m
2 stops
ATL8:16 amAtlanta Hartsfield-Jackson
Nov 3
ATL7:30 amAtlanta Hartsfield-Jackson
6h 40m
1 stop
ONT11:10 amOntario
$203
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 September 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

Sun 10/12

12:49 pm-9:24 am

1 stop17h 35m

Atlanta Hartsfield-Jackson

Mon 10/13

7:55 pm-11:50 pm

1 stop6h 55m

$199

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 9/25

7:30 pm-6:07 am

1 stop7h 37m

Atlanta Hartsfield-Jackson

Mon 9/29

3:14 pm-8:56 pm

1 stop8h 42m

$201

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 10/29

6:53 am-8:16 am

2 stops22h 23m

Atlanta Hartsfield-Jackson

Mon 11/3

7:30 am-11:10 am

1 stop6h 40m

$203

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 10/7

7:04 am-6:02 am

1 stop19h 58m

Atlanta Hartsfield-Jackson

Sun 10/12

6:35 am-7:49 am

1 stop28h 14m

$204

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 10/9

12:32 pm-9:24 am

1 stop17h 52m

Atlanta Hartsfield-Jackson

Sun 10/12

6:35 am-7:49 am

1 stop28h 14m

$205

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 10/15

6:53 am-6:48 pm

1 stop8h 55m

Atlanta Hartsfield-Jackson

Sun 10/19

7:58 pm-7:47 am

1 stop14h 49m

$206

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 9/25

7:30 pm-6:07 am

1 stop7h 37m

Atlanta Hartsfield-Jackson

Sun 10/5

7:56 pm-7:17 am

1 stop14h 21m

$207

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 10/17

12:32 pm-9:24 am

1 stop17h 52m

Atlanta Hartsfield-Jackson

Mon 10/20

8:13 pm-8:42 pm

1 stop27h 29m

$208

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sun 10/12

12:49 pm-9:24 am

1 stop17h 35m

Atlanta Hartsfield-Jackson

Sun 10/19

6:24 pm-7:47 am

2 stops16h 23m

$223

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 9/29

2:45 pm-6:19 am

2 stops12h 34m

Atlanta Hartsfield-Jackson

Sat 10/4

7:34 am-7:54 pm

1 stop15h 20m

$225

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 October is also cheap. Prices for this month can be found on momondo for an average of $371.

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 $359. 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 $459.

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 $303. Flights to Atlanta are more costly in the morning, with an average ticket price of $452. 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 $309 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 September 2025, prices for Ontario to Atlanta flights are approximately 4% 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

$174

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 $174. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $350.
The fastest flight from Ontario to Atlanta takes 4h 05m
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 19m, 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
8,015 reviews
Search Spirit Airlines flights
FrontierPriceFrom $139Free CancellationRating
5.8
3,172 reviews
Search Frontier flights
American AirlinesPriceFrom $281Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
DeltaPriceFrom $317Free CancellationRating
7.9
7,954 reviews
Search Delta flights
SouthwestPriceFrom $344Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 18 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $525, 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 7,954 reviews.

Traveling to a place near Atlanta?

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

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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