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Cheap flights from Ontario to Atlanta from $71

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 11/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Atlanta

Cheap round-trip flights

Frontier Logo
6:00 am - 9:14 pmONT-ATL
12h 14m2 stops
Frontier Logo
3:14 pm - 8:56 pmATL-ONT
8h 42m1 stop
$199Frontier
Find Deal
Thu, Sep 25 - Mon, Sep 29
Frontier Logo
8:59 pm - 6:18 pmONT-ATL
18h 19m1 stop
Frontier Logo
8:00 am - 7:54 pmATL-ONT
38h 54m2 stops
$200Frontier
Find Deal
Wed, Sep 24 - Tue, Sep 30
Frontier Logo
8:00 am - 9:56 pmONT-ATL
10h 56m2 stops
Frontier Logo
3:14 pm - 8:56 pmATL-ONT
8h 42m1 stop
$201Frontier
Find Deal
Tue, Sep 23 - Mon, Sep 29
Frontier Logo
6:05 am - 9:01 pmONT-ATL
11h 56m2 stops
Frontier Logo
6:55 pm - 12:07 amATL-ONT
8h 12m1 stop
$202Frontier
Find Deal
Thu, Oct 16 - Sun, Oct 19
Frontier Logo
10:47 pm - 9:26 amONT-ATL
31h 39m2 stops
Frontier Logo
8:37 pm - 4:28 pmATL-ONT
22h 51m1 stop
$203Frontier
Find Deal
Fri, Oct 10 - Sun, Oct 12
Frontier Logo
6:00 am - 6:44 pmONT-ATL
9h 44m2 stops
Frontier Logo
3:14 pm - 8:56 pmATL-ONT
8h 42m1 stop
$204Frontier
Find Deal
Thu, Sep 11 - Mon, Sep 15
Frontier Logo
8:59 pm - 5:13 pmONT-ATL
17h 14m2 stops
Frontier Logo
8:13 pm - 8:42 pmATL-ONT
27h 29m1 stop
$207Frontier
Find Deal
Sat, Oct 4 - Mon, Oct 27
Frontier Logo
8:59 pm - 9:56 pmONT-ATL
21h 57m1 stop
Frontier Logo
6:55 pm - 11:38 pmATL-ONT
7h 43m1 stop
$209Frontier
Find Deal
Tue, Sep 16 - Sun, Sep 21
Logo
8:00 am - 10:02 pmONT-ATL
11h 02m1 stop
Logo
6:00 am - 11:33 amATL-ONT
8h 33m1 stop
$211
Find Deal
Wed, Sep 17 - Thu, Sep 18
Logo
6:53 am - 7:55 pmONT-ATL
10h 02m1 stop
Logo
9:44 am - 9:04 pmATL-ONT
14h 20m1 stop
$212
Find Deal
Wed, Nov 19 - Wed, Dec 3

Frontier flights from Ontario to Atlanta

Our best Frontier deals on Ontario to Atlanta flight tickets
Frontier
Sep 25
ONT6:00 amOntario
12h 14m
2 stops
ATL9:14 pmAtlanta Hartsfield-Jackson
Sep 29
ATL3:14 pmAtlanta Hartsfield-Jackson
8h 42m
1 stop
ONT8:56 pmOntario
$199
Find similar
Frontier
Sep 24
ONT8:59 pmOntario
18h 19m
1 stop
ATL6:18 pmAtlanta Hartsfield-Jackson
Sep 30
ATL8:00 amAtlanta Hartsfield-Jackson
38h 54m
2 stops
ONT7:54 pmOntario
$200
Find similar
Frontier
Sep 23
ONT8:00 amOntario
10h 56m
2 stops
ATL9:56 pmAtlanta Hartsfield-Jackson
Sep 29
ATL3:14 pmAtlanta Hartsfield-Jackson
8h 42m
1 stop
ONT8:56 pmOntario
$201
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 August 18, 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

Thu 9/25

6:00 am-9:14 pm

2 stops12h 14m

Atlanta Hartsfield-Jackson

Mon 9/29

3:14 pm-8:56 pm

1 stop8h 42m

$199

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 9/24

8:59 pm-6:18 pm

1 stop18h 19m

Atlanta Hartsfield-Jackson

Tue 9/30

8:00 am-7:54 pm

2 stops38h 54m

$200

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 9/23

8:00 am-9:56 pm

2 stops10h 56m

Atlanta Hartsfield-Jackson

Mon 9/29

3:14 pm-8:56 pm

1 stop8h 42m

$201

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 10/16

6:05 am-9:01 pm

2 stops11h 56m

Atlanta Hartsfield-Jackson

Sun 10/19

6:55 pm-12:07 am

1 stop8h 12m

$202

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 10/10

10:47 pm-9:26 am

2 stops31h 39m

Atlanta Hartsfield-Jackson

Sun 10/12

8:37 pm-4:28 pm

1 stop22h 51m

$203

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Thu 9/11

6:00 am-6:44 pm

2 stops9h 44m

Atlanta Hartsfield-Jackson

Mon 9/15

3:14 pm-8:56 pm

1 stop8h 42m

$204

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 10/4

8:59 pm-5:13 pm

2 stops17h 14m

Atlanta Hartsfield-Jackson

Mon 10/27

8:13 pm-8:42 pm

1 stop27h 29m

$207

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Tue 9/16

8:59 pm-9:56 pm

1 stop21h 57m

Atlanta Hartsfield-Jackson

Sun 9/21

6:55 pm-11:38 pm

1 stop7h 43m

$209

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 9/17

8:00 am-10:02 pm

1 stop11h 02m

Atlanta Hartsfield-Jackson

Thu 9/18

6:00 am-11:33 am

1 stop8h 33m

$211

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Wed 11/19

6:53 am-7:55 pm

1 stop10h 02m

Atlanta Hartsfield-Jackson

Wed 12/3

9:44 am-9:04 pm

1 stop14h 20m

$212

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 September is, on average, the cheapest month to fly to Atlanta from Ontario, with most prices found around $337. If you aren’t able to travel to Atlanta during the month of September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $355.

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 $368. 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 $473.

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 $455. 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 $403 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 $340 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 August 2025, prices for Ontario to Atlanta flights are approximately 1% 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

$71

Fastest flight time

6h 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 $71. The best round-trip flight deal from Ontario to Atlanta found on momondo in the last 72 hours is $199.
The fastest flight from Ontario to Atlanta takes 6h 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
8,038 reviews
Search Spirit Airlines flights
FrontierPriceFrom $138Free CancellationRating
5.8
3,212 reviews
Search Frontier flights
American AirlinesPriceFrom $286Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights
DeltaPriceFrom $304Free CancellationRating
8.0
7,981 reviews
Search Delta flights
SouthwestPriceFrom $341Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

  • Delta Flights From Ontario to Atlanta

    Delta operates around 20 flights from Ontario to Atlanta every week. The average price of these flights found in the last 72 hours has been $512, but momondo users have found Delta deals from Ontario to Atlanta from as low as $304 round-trip. Delta has been scored 8.0/10 in 7,981 reviews.

  • United Airlines Flights From Ontario to Atlanta

    United Airlines (7.4/10 from 8,925 reviews) operates around 3 flights from Ontario to Atlanta in any given week. The average United Airlines airfare for this route is around $474, with deals from around $296 rare but found on momondo. Referenced prices are for round-trip Ontario to Atlanta flight searches in the last 72 hours.

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
Athens
Lawrenceville
Stone Mountain
Norcross
Dahlonega
Auburn
Gadsden
Covington
Cartersville
Conyers
La Grange
Gainesville
Newnan
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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