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Cheap flights from Atlanta to Los Angeles from $75

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Atlanta to Los Angeles departing on 10/10. 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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Cheap round-trip flights

Frontier Logo
7:23 pm - 7:54 pmATL-ONT
27h 31m1 stop
Frontier Logo
8:59 pm - 9:56 pmONT-ATL
21h 57m1 stop
$150Frontier
Find Deal
vie., sep. 12 - lun., sep. 15
Frontier Logo
7:42 am - 7:54 pmATL-ONT
15h 12m1 stop
Frontier Logo
6:53 am - 6:02 amONT-ATL
20h 09m1 stop
$151Frontier
Find Deal
mié., sep. 24 - mié., oct. 15
Frontier Logo
8:37 pm - 4:28 pmATL-ONT
22h 51m1 stop
Frontier Logo
7:04 am - 6:02 amONT-ATL
19h 58m1 stop
$152Frontier
Find Deal
dom., oct. 12 - sáb., oct. 18
Frontier Logo
8:30 pm - 6:35 pmATL-ONT
25h 05m1 stop
Frontier Logo
7:15 pm - 8:59 amONT-ATL
10h 44m1 stop
$153Frontier
Find Deal
jue., sep. 18 - dom., sep. 21
Frontier Logo
7:30 am - 11:10 amATL-ONT
6h 40m1 stop
Frontier Logo
7:44 pm - 5:11 amONT-ATL
6h 27m1 stop
$158Frontier
Find Deal
jue., oct. 30 - jue., oct. 30
Frontier Logo
6:55 pm - 11:38 pmATL-ONT
7h 43m1 stop
Frontier Logo
8:59 pm - 9:56 pmONT-ATL
21h 57m1 stop
$159Frontier
Find Deal
vie., sep. 19 - lun., sep. 22
Frontier Logo
6:55 pm - 11:38 pmATL-ONT
7h 43m1 stop
Frontier Logo
7:15 pm - 8:59 amONT-ATL
10h 44m1 stop
$160Frontier
Find Deal
vie., sep. 19 - dom., sep. 21
Frontier Logo
7:30 am - 11:10 amATL-ONT
6h 40m1 stop
Frontier Logo
7:44 pm - 5:59 amONT-ATL
7h 15m1 stop
$168Frontier
Find Deal
jue., oct. 30 - lun., nov. 10
Frontier Logo
6:43 pm - 11:40 pmATL-ONT
7h 57m1 stop
Frontier Logo
6:53 am - 7:55 pmONT-ATL
10h 02m1 stop
$169Frontier
Find Deal
jue., oct. 30 - mar., nov. 11
Logo
6:00 am - 11:28 amATL-ONT
8h 28m1 stop
Logo
2:45 pm - 6:07 amONT-ATL
12h 22m1 stop
$189
Find Deal
vie., sep. 19 - lun., sep. 22

Frontier flights from Atlanta to Ontario

Our best Frontier deals on Atlanta to Ontario flight tickets
Frontier
Sep 12
ATL7:23 pmAtlanta Hartsfield-Jackson
27h 31m
1 stop
ONT7:54 pmOntario
Sep 15
ONT8:59 pmOntario
21h 57m
1 stop
ATL9:56 pmAtlanta Hartsfield-Jackson
$150
Find similar
Frontier
Sep 24
ATL7:42 amAtlanta Hartsfield-Jackson
15h 12m
1 stop
ONT7:54 pmOntario
Oct 15
ONT6:53 amOntario
20h 09m
1 stop
ATL6:02 amAtlanta Hartsfield-Jackson
$151
Find similar
Frontier
Oct 12
ATL8:37 pmAtlanta Hartsfield-Jackson
22h 51m
1 stop
ONT4:28 pmOntario
Oct 18
ONT7:04 amOntario
19h 58m
1 stop
ATL6:02 amAtlanta Hartsfield-Jackson
$152
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Atlanta to Ontario 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 agosto 18, 2025.
Use the filters below to find and compare flights from Atlanta to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

vie. 9/12

7:23 pm-7:54 pm

1 stop27h 31m

Ontario

lun. 9/15

8:59 pm-9:56 pm

1 stop21h 57m

$150

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

mié. 9/24

7:42 am-7:54 pm

1 stop15h 12m

Ontario

mié. 10/15

6:53 am-6:02 am

1 stop20h 09m

$151

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

dom. 10/12

8:37 pm-4:28 pm

1 stop22h 51m

Ontario

sáb. 10/18

7:04 am-6:02 am

1 stop19h 58m

$152

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

jue. 9/18

8:30 pm-6:35 pm

1 stop25h 05m

Ontario

dom. 9/21

7:15 pm-8:59 am

1 stop10h 44m

$153

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

jue. 10/30

7:30 am-11:10 am

1 stop6h 40m

Ontario

jue. 10/30

7:44 pm-5:11 am

1 stop6h 27m

$158

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

vie. 9/19

6:55 pm-11:38 pm

1 stop7h 43m

Ontario

lun. 9/22

8:59 pm-9:56 pm

1 stop21h 57m

$159

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

vie. 9/19

6:55 pm-11:38 pm

1 stop7h 43m

Ontario

dom. 9/21

7:15 pm-8:59 am

1 stop10h 44m

$160

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

jue. 10/30

7:30 am-11:10 am

1 stop6h 40m

Ontario

lun. 11/10

7:44 pm-5:59 am

1 stop7h 15m

$168

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

jue. 10/30

6:43 pm-11:40 pm

1 stop7h 57m

Ontario

mar. 11/11

6:53 am-7:55 pm

1 stop10h 02m

$169

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

vie. 9/19

6:00 am-11:28 am

1 stop8h 28m

Ontario

lun. 9/22

2:45 pm-6:07 am

1 stop12h 22m

$189

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Atlanta to Ontario

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 Ontario?

In general, June is the cheapest month to fly from Atlanta to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $265. If you aren’t able to travel during the month of June, then book flights to Ontario from Atlanta during February instead. Flights to Ontario in February, while not as cheap as those in June, still average around $298.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $440. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Atlanta to Ontario for around $618.

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

At noon is the cheapest time of day to fly from Atlanta to Ontario when you can find flight prices for as low as $412. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $499 on average. Flights to Ontario from Atlanta in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Atlanta Hartsfield-Jackson to Ontario flight route?

Fly from Atlanta Hartsfield-Jackson to Ontario for the best Atlanta Hartsfield-Jackson - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $372 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Atlanta for as low as $264 on momondo.

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

There are 4 cabin classes available to choose from on Atlanta Hartsfield-Jackson to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Atlanta to Ontario flight prices changed over time?

As of August 2025, prices for Atlanta to Ontario flights are approximately 98% more expensive when compared to flights at the same time last year.

When to book flights from Atlanta to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Atlanta to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Atlanta to Ontario (ATL to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Atlanta to Ontario

Best Price Found

$75

Fastest flight time

6h 40m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Atlanta in the past 72 hours is $75. The best round-trip flight deal from Atlanta to Ontario found on momondo in the last 72 hours is $150.
The fastest flight from Atlanta to Ontario takes 6h 40m
Direct flights go from Atlanta to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)
Search flight deals

  • How far is Atlanta Hartsfield-Jackson to Ontario by plane?

    Atlanta Hartsfield-Jackson and Ontario are 1897.6 mi apart from one another. Flights usually cover this in 6h 40m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Atlanta Hartsfield-Jackson Airport to Ontario Airport?

    Prices for flights from Atlanta Hartsfield-Jackson Airport to Ontario Airport are updated daily.

  • How many operators does momondo search for flights from Atlanta Hartsfield-Jackson Airport to Ontario Airport?

  • How old do you have to be to fly from Atlanta Hartsfield-Jackson Airport to Ontario Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Atlanta Hartsfield-Jackson Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Atlanta to Ontario?

  • What is the most popular airline from Atlanta to Ontario?

Best airlines flying from Atlanta to Ontario

Compare and see reviews for airlines that fly from Atlanta to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $128Free CancellationRating
5.8
3,212 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $130Free CancellationRating
6.3
8,038 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $280Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $299Free CancellationRating
8.0
7,981 reviews
Search Delta flights
SouthwestPriceFrom $318Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

  • Delta Flights From Atlanta to Ontario

    Delta flies from Atlanta to Ontario around 20 times per week, with 7,981 momondo users rating the airline 8.0/10. The cheapest Delta deal from Atlanta to Ontario in the last 72 hours was $299 (round-trip), much lower than the average airfare cost of $496 for Delta flights on this route.

  • Southwest Flights From Atlanta to Ontario

    Across 4,246 Southwest reviews on momondo, the average score is 8.0/10. Southwest flies from Atlanta to Ontario about 1 time each week, with ticket deals ranging from $318 to $417. Price data is based on momondo searches in the last 72 hours.

Why use momondo?

Why should I use momondo to find a flight deal from Atlanta to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Atlanta to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from Atlanta to Ontario with flexible booking policies on momondo?

All flight searches from Atlanta to Ontario on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Atlanta to Ontario?

Once all potential Atlanta to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Atlanta to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Atlanta. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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