ATL - ONT

$54 Find Cheap Flights from Atlanta to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Atlanta to Ontario departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Atlanta to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Atlanta to Ontario, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$124
Overall average: $399
Frontier
Wed 3/11Mon 3/23
ATL - ONT • 1 stop
Cheapest non-stop
$398
Typical prices: $429-$549
Delta
Fri 3/6Fri 3/13
ATL - ONT • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Avoid parking at ATL; use MARTA for convenience.
Use Metrolink San Bernardino Line for easy ONT access.
Expert advice
Expert advice
Expert advice
Expert advice
When to travel
October
Cheapest • 34% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Atlanta to Ontario (ATL-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Atlanta to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Atlanta to Ontario

Wed, Mar 11 - Mon, Mar 23
Frontier Logo
10:30 am - 11:59 pm
ATL
-
ONT
16h 29m
1 stop
Frontier Logo
3:30 pm - 8:09 pm
ONT
-
ATL
25h 39m
1 stop
$124Frontier
Thu, Feb 26 - Sat, Mar 7
Frontier Logo
7:45 am - 2:29 pm
ATL
-
ONT
9h 44m
1 stop
Frontier Logo
6:15 am - 4:51 am
ONT
-
ATL
19h 36m
1 stop
$145Frontier
Wed, Feb 25 - Tue, Mar 3
Frontier Logo
9:09 pm - 1:11 pm
ATL
-
ONT
19h 02m
1 stop
Frontier Logo
2:06 pm - 2:28 pm
ONT
-
ATL
21h 22m
1 stop
$147Frontier
Tue, Mar 3 - Sat, Mar 7
Multiple Airlines Logo
5:47 pm - 1:11 pm
ATL
-
ONT
22h 24m
2 stops
Multiple Airlines Logo
6:15 am - 4:51 am
ONT
-
ATL
19h 36m
1 stop
$151Multiple Airlines
Thu, Feb 26 - Tue, Mar 3
Frontier Logo
7:45 am - 2:29 pm
ATL
-
ONT
9h 44m
1 stop
Frontier Logo
2:06 pm - 2:28 pm
ONT
-
ATL
21h 22m
1 stop
$157Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:55 pm - 9:34 am
ATL
-
ONT
16h 39m
1 stop
Frontier Logo
6:00 am - 5:25 am
ONT
-
ATL
20h 25m
1 stop
$158Frontier
Tue, Mar 3 - Sat, Mar 7
Frontier Logo
10:17 am - 9:34 pm
ATL
-
ONT
14h 17m
1 stop
Frontier Logo
6:15 am - 4:51 am
ONT
-
ATL
19h 36m
1 stop
$159Frontier
Mon, Mar 2 - Sat, Mar 7
Frontier Logo
7:45 am - 2:30 pm
ATL
-
ONT
9h 45m
1 stop
Frontier Logo
6:15 am - 4:51 am
ONT
-
ATL
19h 36m
1 stop
$164Frontier
Wed, Mar 11 - Mon, Mar 23
Frontier Logo
3:24 pm - 1:11 pm
ATL
-
ONT
24h 47m
2 stops
Frontier Logo
3:30 pm - 8:09 pm
ONT
-
ATL
25h 39m
1 stop
$165Frontier
Wed, Mar 11 - Mon, Mar 23
Frontier Logo
10:30 am - 11:59 pm
ATL
-
ONT
16h 29m
1 stop
Frontier Logo
4:22 pm - 9:23 am
ONT
-
ATL
14h 01m
1 stop
$166Frontier
Booking Insights

KAYAK's insights & trends for Atlanta to Ontario flights

Get data-powered insights and trends into flights from Atlanta to Ontario to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Atlanta to Ontario?

The average price of all round-trip flights from Atlanta to Ontario clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ontario on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Atlanta to Ontario. For your return ticket, we recommend flying on a Saturday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Atlanta to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Atlanta to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Atlanta to Ontario is October, where tickets cost $246 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $469 and $413 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Atlanta to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Atlanta to Ontario, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Expert advice

Expert advice for your flight from Atlanta to Ontario

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Blane Bachelor

Blane Bachelor

Expert on ATL

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low seasonSeptember
Cheapest flight$54
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 30% lower on average.
Flight from Atlanta to Ontario

When to book flights from Atlanta to Ontario

Are your dates flexible? Find out the best times to travel from Atlanta to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Atlanta to Ontario

  • Where can I sleep when at ONT?

    If you need to sleep after flights from Atlanta to Ontario, you can find a number of accommodation options close to the airport. There are three hotels that are within a 10min to 30min distance from the airport and include: the Azure Hotel and Suites Ontario Airport, the Candlewood Suites Ontario Convention Center and the Conform Suites Ontario Convention Center. The Comfort Suites Ontario Convention Center has an added advantage over the others since there is the provision of a free airport shuttle from the airport.

  • Are there any places at ONT I can eat?

    You might get hungry when at the airport or are just looking for a place where you may grab a snack when on the go. There are a variety of food concessions for you to choose from such as the Wolfgang Puck Pizza, Harvest and Grounds and the Cross Grain Brewhouse in Terminal 2 and the Wahoo’s Fish Taco, Rock and Brews, Einstein Bros and Bagels and Coffee Bean and Tea Leaf in Terminal 4. All the food concessions run on separate schedules and it is important to know none runs for 24h.

  • Where can I locate the Traveler’s Aid at ONT?

    Traveler's Aid has workers that are dispersed across the Ontario airport and are available to help with issues like finding temporary housing, mailing money, recovering lost or stolen money, providing transportation, etc. In Terminal 2 and Terminal 4, respectively, the Traveler's Aid offices are situated between the escalator and baggage claim.

  • What are my transport options to ATL?

    There are several of transport options because you might want to hunt for dependable transportation when heading to the airport. The most popular transportation choices are buses and cabs, with only MARTA bus 191 operating on the airport route. There are more taxis since they are plentiful, practical, and quick. You might also think about renting a car, with rental locations adjacent to the terminals and reachable through the ATL SkyTrain, the airport's inter-terminal transit system.

  • What is the cheapest flight from Atlanta to Ontario?

    In the last 3 days, the lowest price for a flight from Atlanta to Ontario was $54 for a one-way ticket and $124 for a round-trip.

  • Do I need a passport to fly between Atlanta and Ontario?

    A passport is not required to fly from Atlanta to Ontario.

  • Which airlines offer Wi-Fi service onboard planes from Atlanta to Ontario?

    Delta, Alaska Airlines, JetBlue, and American Airlines offer inflight Wi-Fi service on the Atlanta to Ontario flight route.

  • Which aircraft models fly most regularly from Atlanta to Ontario?

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the Atlanta to Ontario flight route.

  • Which airline alliances offer flights from Atlanta to Ontario?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Atlanta and Ontario, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Atlanta to Ontario?

    There are nonstop flights from Atlanta to Ontario on a daily basis.

  • Which is the best airline for flights from Atlanta to Ontario, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Atlanta to Ontario are Southwest and Delta. With an average price for the route of $429 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $502 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Atlanta to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Atlanta to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Atlanta to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Atlanta is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Atlanta to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Atlanta with another airline. Booking your flights between Atlanta and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Atlanta to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Atlanta up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Atlanta to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $348 or less one-way and $469 or less round-trip.
  • You can head over to the Information Desk which is located at both Terminal 2 and 4 at Ontario International Airport (ONT) where the Information Desks are located if you are unable to get assistance from the Traveler's Aid personnel.
  • Water fountains are available in the Terminal 4 and Terminal 2 sectors of ONT if you become dehydrated while there.
  • You might want to be informed that ONT offers baby care services if you're bringing a baby. Near Gate 207 in Terminal 2 and Gate 407 in Terminal 4, respectively, you can find spaces to change diapers and nurse.
  • When you are in Hartsfield-Jackson Atlanta International Airport (ATL), go to Concourse T's second floor to use the business services there. You will be able to have access to amenities such as a desk area, free Wi-Fi, a fax machine and printer to increase convenience.
  • There are reusable, potable charging systems at Gates E27, C3 and A16 of ATL which you can take advantage of to charge your electrical appliances.

Prefer to fly direct from Atlanta to Ontario?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Atlanta Hartsfield-Jackson to Ontario.
Find which airlines fly direct from Atlanta Hartsfield-Jackson Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

Atlanta Hartsfield-Jackson to Ontario

Monday

Delta

Delta

Tuesday

Delta

Delta

Wednesday

Delta

Delta

Thursday

Delta

Delta

Friday

Delta

Delta

Saturday

Delta

Delta

Sunday

Delta

Delta

See more direct flights

Direct returns

Ontario to Atlanta Hartsfield-Jackson

Monday

Delta

Delta

Tuesday

Delta

Delta

Wednesday

Delta

Delta

Thursday

Delta

Delta

Friday

Delta

Delta

Saturday

Delta

Delta

Sunday

Delta

Delta

See more direct flights

Reviews of the top 5 airlines serving from Atlanta to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Atlanta to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Atlanta to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4279 reviews
8.6Crew
8.1Boarding
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

I upgraded to first. Quick and easy boarding. Comfortable seat with power and a nice IPA.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

It was good because we traveled without luggage, carry on only.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Arrived 40 min early which was great - sat in runway for 35 min so no gain. Then waited for luggage 45 min. They need to staff accordingly knowing its one of the busiest week in Phx

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Plane and crew on board were fine. Everything else was terrible.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Inbound plane was on time and flight departed on time with no issues while boarding.

i was unable to check in the flight. refund requested

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Everything you need to know for your flight from Atlanta to Ontario

Information on your arrival and departure airports