Which layover airport has the shortest connection time from Atlanta to Ontario?

Dallas (DFW) has the shortest average layover time for this route: 1h 12m.

What airlines fly to Ontario?

Delta, Frontier and Spirit Airlines are the top three most popular airlines that fly to Ontario from Atlanta according to our data. Delta is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Atlanta to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $284.

How often are flights from Atlanta to Ontario delayed?

Historically, on average around 22% of flights between Atlanta and Ontario have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Which airport is the most popular layover for flights between Atlanta and Ontario?

Dallas (DFW) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Atlanta to Ontario?

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 6h 55m.

How many flights depart from Atlanta to Ontario on average per day?

8 flights are operational daily from Atlanta to Ontario as of October 2025. The most popular departure time for this route is 5:00PM, with 46% of flights per day taking off in the afternoon.

How many flights depart from Atlanta to Ontario on average per week?

The number of flights available between Atlanta and Ontario is 57 per week as of October 2025. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.

What is the most punctual flight time for Atlanta to Ontario flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Which airline has the best punctuality record on Atlanta to Ontario flights?

According to our data, WestJet have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

What is the cheapest airline that flies from Atlanta Hartsfield-Jackson to Ontario?

Frontier and Southwest are the most popular carriers operating from Atlanta Hartsfield-Jackson to Ontario

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?

As of October 2025, there are 6 operators available to choose from 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.

$56 Cheap Flights from Atlanta to Ontario in 2025/26

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12:15 pm - 9:27 pmATL-ONT

12h 12m1 stop

7:44 pm - 5:15 amONT-ATL

6h 31m1 stop

$168Frontier

Find Deal

Tue, Nov 4 - Thu, Nov 6

12:15 pm - 9:27 pmATL-ONT

12h 12m1 stop

6:53 am - 5:23 pmONT-ATL

7h 30m1 stop

$170Frontier

Find Deal

Tue, Nov 4 - Sat, Nov 8

6:43 pm - 11:40 pmATL-ONT

7h 57m1 stop

8:45 am - 7:55 pmONT-ATL

8h 10m1 stop

$171Frontier

Find Deal

Thu, Nov 6 - Wed, Nov 12

12:43 pm - 9:17 pmATL-ONT

11h 34m1 stop

2:59 pm - 12:44 pmONT-ATL

18h 45m1 stop

$172Frontier

Find Deal

Wed, Dec 3 - Mon, Dec 8

12:15 pm - 9:27 pmATL-ONT

12h 12m1 stop

6:53 am - 5:23 pmONT-ATL

7h 30m1 stop

$174Frontier

Find Deal

Tue, Nov 4 - Sat, Nov 8

9:10 pm - 3:06 pmATL-ONT

20h 56m2 stops

3:20 pm - 6:13 amONT-ATL

11h 53m1 stop

$177Frontier

Find Deal

Sat, Dec 6 - Sat, Dec 13

7:20 am - 9:17 pmATL-ONT

16h 57m2 stops

5:13 pm - 5:57 amONT-ATL

9h 44m1 stop

$178Multiple Airlines

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Sat, Dec 13 - Fri, Jan 9

9:44 am - 5:02 pmATL-ONT

10h 18m1 stop

6:00 am - 6:48 pmONT-ATL

9h 48m1 stop

$179Multiple Airlines

Find Deal

Thu, Jan 29 - Mon, Feb 2

6:29 pm - 11:50 pmATL-ONT

8h 21m1 stop

8:45 am - 7:55 pmONT-ATL

8h 10m1 stop

$180Frontier

Find Deal

Sat, Nov 1 - Wed, Nov 19

7:30 am - 11:10 amATL-ONT

6h 40m1 stop

8:45 am - 7:55 pmONT-ATL

8h 10m1 stop

$182Frontier

Find Deal

Sun, Nov 9 - Wed, Nov 19

Frontier flights from Atlanta to Ontario

Our best Frontier deals on Atlanta to Ontario flight tickets

Frontier

Nov 4

ATL12:15 pmAtlanta Hartsfield-Jackson

12h 12m

1 stop

ONT9:27 pmOntario

Nov 6

ONT7:44 pmOntario

6h 31m

1 stop

ATL5:15 amAtlanta Hartsfield-Jackson

$168

Find similar

Frontier

Oct 30

ATL6:00 amAtlanta Hartsfield-Jackson

28h 29m

1 stop

ONT7:29 amOntario

Nov 19

ONT8:45 amOntario

8h 10m

1 stop

ATL7:55 pmAtlanta Hartsfield-Jackson

$169

Find similar

Frontier

Nov 4

ATL12:15 pmAtlanta Hartsfield-Jackson

12h 12m

1 stop

ONT9:27 pmOntario

Nov 8

ONT6:53 amOntario

7h 30m

1 stop

ATL5:23 pmAtlanta Hartsfield-Jackson

$170

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Fly to

Route

Depart

Return

Price

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Tue 11/4

12:15 pm-9:27 pm

1 stop12h 12m

Ontario

Thu 11/6

7:44 pm-5:15 am

1 stop6h 31m

$168

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Tue 11/4

12:15 pm-9:27 pm

1 stop12h 12m

Ontario

Sat 11/8

6:53 am-5:23 pm

1 stop7h 30m

$170

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Thu 11/6

6:43 pm-11:40 pm

1 stop7h 57m

Ontario

Wed 11/12

8:45 am-7:55 pm

1 stop8h 10m

$171

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Wed 12/3

12:43 pm-9:17 pm

1 stop11h 34m

Ontario

Mon 12/8

2:59 pm-12:44 pm

1 stop18h 45m

$172

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Tue 11/4

12:15 pm-9:27 pm

1 stop12h 12m

Ontario

Sat 11/8

6:53 am-5:23 pm

1 stop7h 30m

$174

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sat 12/6

9:10 pm-3:06 pm

2 stops20h 56m

Ontario

Sat 12/13

3:20 pm-6:13 am

1 stop11h 53m

$177

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sat 12/13

7:20 am-9:17 pm

2 stops16h 57m

Ontario

Fri 1/9

5:13 pm-5:57 am

1 stop9h 44m

$178

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Thu 1/29

9:44 am-5:02 pm

1 stop10h 18m

Ontario

Mon 2/2

6:00 am-6:48 pm

1 stop9h 48m

$179

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sat 11/1

6:29 pm-11:50 pm

1 stop8h 21m

Ontario

Wed 11/19

8:45 am-7:55 pm

1 stop8h 10m

$180

AtlantaOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sun 11/9

7:30 am-11:10 am

1 stop6h 40m

Ontario

Wed 11/19

8:45 am-7:55 pm

1 stop8h 10m

$182

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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

Prices

Airlines

Delays

Layovers

Other information

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 $262. If you aren’t able to travel during the month of June, then book flights to Ontario from Atlanta during October instead. Flights to Ontario in October, while not as cheap as those in June, still average around $299.

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 Thursday when prices can be found for as low as $459. 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 $674.

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 afternoon when prices are $548 on average. Flights to Ontario from Atlanta in the afternoon 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 $368 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 $288 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 October 2025, prices for Atlanta to Ontario flights are approximately 36% 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	$648
Fastest flight time	4h 29m
Direct flights	Every day
Airports in Ontario	1 airport

The best one-way flight to Ontario from Atlanta in the past 72 hours is $648. The best round-trip flight deal from Atlanta to Ontario found on momondo in the last 72 hours is $319.

The fastest flight from Atlanta to Ontario takes 4h 29m

Direct flights go from Atlanta to Ontario every day.

There is 1 airport near Ontario: Ontario (ONT)

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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?
As of October 2025, there are 6 operators available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Atlanta to Ontario is Airbus A321-100/200 (38.12% of total bookings). The next most popular plane models are Airbus A321neo (18.02%), Airbus A318/A319/A320/A321 (15.40%), and Airbus A320-100/200 (7.05%).
What is the most popular airline from Atlanta to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Atlanta to Ontario is Frontier (45% of total bookings). The next most popular airlines are Delta (34%), Southwest (11%), and American Airlines (7%).

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
Spirit Airlines	PriceFrom $130	Free Cancellation	Rating 6.3 8,097 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $137	Free Cancellation	Rating 5.8 3,130 reviews	Search Frontier flights
American Airlines	PriceFrom $280	Free Cancellation	Rating 7.2 11,028 reviews	Search American Airlines flights
Delta	PriceFrom $299	Free Cancellation	Rating 7.9 7,980 reviews	Search Delta flights
Southwest	PriceFrom $330	Free Cancellation	Rating 8.0 4,237 reviews	Search Southwest flights
United Airlines	PriceFrom $338	Free Cancellation	Rating 7.4 8,988 reviews	Search United Airlines flights

Delta Flights From Atlanta to Ontario
Delta flies from Atlanta to Ontario around 13 times per week, with 7,980 momondo users rating the airline 7.9/10. 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 $510 for Delta flights on this route.

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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Cheap flights from Atlanta to Los Angeles from $56

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 2/10. 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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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?

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

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

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?

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 October 2025, prices for Atlanta to Ontario flights are approximately 36% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Atlanta Hartsfield-Jackson to Ontario?

Frontier and Southwest are the most popular carriers operating from Atlanta Hartsfield-Jackson to Ontario

What airlines fly to Ontario?

How often are flights from Atlanta to Ontario delayed?

Historically, on average around 22% of flights between Atlanta and Ontario have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What is the most punctual flight time for Atlanta to Ontario flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Atlanta to Ontario flights?

According to our data, WestJet have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between Atlanta and Ontario?

Dallas (DFW) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Atlanta to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $284.

Which layover airport has the shortest travel time from Atlanta to Ontario?

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 6h 55m.

Which layover airport has the shortest connection time from Atlanta to Ontario?

Dallas (DFW) has the shortest average layover time for this route: 1h 12m.

How many flights depart from Atlanta to Ontario on average per day?

8 flights are operational daily from Atlanta to Ontario as of October 2025. The most popular departure time for this route is 5:00PM, with 46% of flights per day taking off in the afternoon.

How many flights depart from Atlanta to Ontario on average per week?

The number of flights available between Atlanta and Ontario is 57 per week as of October 2025. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.

When to book flights from Atlanta to Ontario

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

Fastest flight time

Direct flights

Airports in Ontario

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

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

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?

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

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

Delta Flights From Atlanta to Ontario

Why use momondo?

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

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

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

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

Get notified when prices go down