ATL - ONT

$102 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 8/15. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Expert advice
Useful Info
Flights 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

Tue, Aug 5 - Mon, Aug 11
Frontier Logo
7:54 pm - 11:50 pmATL-ONT
6h 56m1 stop
Frontier Logo
7:22 pm - 5:48 amONT-ATL
7h 26m1 stop
$199Frontier
Find Deal
Fri, Aug 8 - Sun, Aug 10
Frontier Logo
7:54 pm - 11:50 pmATL-ONT
6h 56m1 stop
Frontier Logo
6:00 am - 8:21 pmONT-ATL
11h 21m1 stop
$208Frontier
Find Deal
Sat, Aug 2 - Sat, Aug 16
Frontier Logo
7:54 pm - 11:50 pmATL-ONT
6h 56m1 stop
Frontier Logo
7:00 am - 8:31 pmONT-ATL
10h 31m1 stop
$214Frontier
Find Deal
Thu, Aug 21 - Mon, Aug 25
Frontier Logo
6:55 pm - 11:40 pmATL-ONT
7h 45m1 stop
Frontier Logo
7:19 pm - 5:23 amONT-ATL
7h 04m1 stop
$216Frontier
Find Deal
Tue, Aug 12 - Thu, Aug 14
Frontier Logo
10:30 am - 4:20 pmATL-ONT
8h 50m1 stop
Frontier Logo
5:14 pm - 5:03 amONT-ATL
8h 49m1 stop
$218Frontier
Find Deal
Sat, Aug 16 - Sat, Aug 23
Frontier Logo
10:30 am - 9:52 pmATL-ONT
14h 22m1 stop
Frontier Logo
8:00 am - 5:14 amONT-ATL
18h 14m1 stop
$229Frontier
Find Deal
Sat, Aug 16 - Sat, Aug 23
Frontier Logo
10:30 am - 4:20 pmATL-ONT
8h 50m1 stop
Frontier Logo
1:07 pm - 5:14 amONT-ATL
13h 07m1 stop
$230Frontier
Find Deal
Sat, Aug 9 - Thu, Aug 14
Frontier Logo
7:54 pm - 11:50 pmATL-ONT
6h 56m1 stop
Frontier Logo
5:14 pm - 5:03 amONT-ATL
8h 49m1 stop
$239Frontier
Find Deal
Mon, Aug 11 - Mon, Aug 18
Frontier Logo
7:45 am - 11:50 pmATL-ONT
19h 05m1 stop
Frontier Logo
7:22 pm - 5:03 amONT-ATL
6h 41m1 stop
$240Frontier
Find Deal
Sat, Aug 16 - Mon, Aug 25
Frontier Logo
10:30 am - 4:20 pmATL-ONT
8h 50m1 stop
Frontier Logo
7:19 pm - 5:23 amONT-ATL
7h 04m1 stop
$242Frontier
Find Deal
Expert advice

Expert advice for your flight from Atlanta to Ontario

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
ATL

Avoid parking at ATL due to ongoing construction. Consider MARTA for a hassle-free commute, avoiding Atlanta's notorious traffic.

Read more about ATLby Blane Bachelor
ONT

For a stress-free arrival at ONT, use the Metrolink San Bernardino Line and ONT Connect Shuttle for easy access from Los Angeles.

Read more about ONTby Jennifer Simonson
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

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.

Read more
Blane Bachelor

Blane Bachelor

Expert on ATL

Blane Bachelor

Blane Bachelor

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.

Read more
Useful Info

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, Monday 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 June, where tickets cost $265 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $431 and $426 respectively.

Can I save money by flying with a layover from Atlanta to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $964 on average.

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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonFebruary
High seasonOctober
Cheapest flight$102
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 12% 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 $102 for a one-way ticket and $199 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, 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?

    SkyTeam is the only airline alliance operating flights between Atlanta and Ontario.

  • 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, Delta or Southwest?

    The two airlines most popular with KAYAK users for flights from Atlanta to Ontario are Delta and Southwest. With an average price for the route of $477 and an overall rating of 8.0, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $417 and an overall rating of 8.0.

  • 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 $399 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

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Tuesday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Wednesday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Thursday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Friday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Saturday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

Sunday

Aeromexico, Air France, Delta, +2 more

Aeromexico, Air France, +3 more

See more direct flights

Direct returns

Ontario to Atlanta Hartsfield-Jackson

Monday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Tuesday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Wednesday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Thursday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Friday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Saturday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

Sunday

Aeromexico, Air France, Delta, +3 more

Aeromexico, Air France, +4 more

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 4244 reviews
8.6Crew
8.1Boarding
7.0Food
7.6Entertainment
8.0Comfort
Airline reviews

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

8.0 ExcellentMichael, Jun 2025PHX - SAN
Read more Southwest reviews

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

The fluidity of the entire process of boarding the plane the flight attendants attentiveness. The flight attendants also provided coloring books for my kids who loved it.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Overall, it was okay. Seat was a little cramped. Would’ve liked more substantial snacks or opportunity to buy some.

I was with one of the last zones to board. It was kind of annoying to finally get called to board and my whole section was already on the plane. Clearly they boarded with previous zones. So by the time I got on board, there were no spaces for my luggage above my head. I had to put my luggage 4+ rows behind me, which meant that I had to wait even longer to get off the plane, since I had to wait for those rows to clear the aisle before I could retrieve my luggage and exit the plane. This also held up the plane cleaners, as they couldn't service my row until I cleared it, so they were all standing there waiting for me, while I'm standing there waiting for the other passengers to clear the aisle. Anyways, I wasn't in a rush this time, so I just waited, but I could see that being a problem in the future. Now, I could have checked my luggage, of course, but coincidentally, a friend of mine on the same flight got their luggage damaged (wheel completely knocked off) and was told by the Baggage Attendant in the airport that Delta doesn't "cover wheel damage" on luggage. This was disappointing to hear. I'm glad I didn't check mine through. If it were my luggage, I'd be highly frustrated to hear that. It makes me not want to check my luggage in the future.

Great flight. On-time, comfortable, clean aircraft, and offered snacks pre-flight to plan for a potentially turbulent route. I wish there was Wi-Fi an all Delta Aircrafts but for a short flight this is not much of a problem.

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

Flight did not have seat back entertainment and the wifi was iffy.

The seats are uncomfortable, feels like a small seat pad on plywood.

Wifi did not work and they only served water, coffee, or tea.

Airline lost my luggage and set me back a day worth of travel due to having to stay in Denver to wait on my luggage

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

Initial flight was cancelled at the time of arrival to the airport, flight alternative requires switching from direct to flight with a layover, and the plane felt like it would split apart, it was so rattle-y.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

Boarding gate in Honolulu was staffed with a great clerk with a soothing voice despite the flight delay of over an hour. Flight attendants in the plane were all grumpy, not pleasant looking bunch. Their sour attitude showed throughout the flight. Inly able to get a select few movies started. Most of the movie links in the “free entertainment” did not work.

This was a horrible experience. For a first class experience, my chair was held together by 3M tape - and I have a photo. The crew weren’t very attentive, somewhat dismissive and forgot my drink and snack, the chair reclined about 3 inches on a 6-hour cross country flight. I was also not informed that there was no lounge available in Newark airport because of renovations, so all around this was one of the worst experiences and I would actively avoid both American and Alaska Air going forward.

Boarding was very efficient. Everyone got on board and we got on our way very quickly. It was frustrating that the entertainment app was not functioning properly. I was not able to activate some of the movies offered. The crew on this flight appears to be pretty grumpy. They had no smile on their faces. I felt like they were doing us a favor for being there.

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

Long 5 hour and 45 min flight and only one drink service and cookie snack

Everything was great except British airways lost our luggage that was gate checked all the way through to Italy. No one knows currently where one is and the other one may be in route to Amsterdam to meet us but not sure. If you can Hale’s it would be awesome. The website is not helpful.

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Boarding was a breeze, however, two of the flights that I boarded with Spirit did not have Wi-Fi available.

Very good. Nothing more or less than expected. No complaints.

My experience with the spirit as a first time it was OK, but the seats need a little cushion, the problem I had the most impacted me was when checking in the scales were so off and wrong. It will tell that you would have more weight, which was not true. The scale was say that it had Thirty Eight Pounds, when get in the labels when we send the luggage into the band. It says that it was overweight. I really really dislike that because the scales are not accurate. If I use Spirit and I have that issue again. That will be my last time flying with the spirit, even though I like so much to service the planes, and everything else

hahaha we are delayed for one hour plus.. but thx we arrived San Diego safe

The staff was great, but because the 2nd lieutenant didn’t show up for the flight we all had to deboard and wait 2 1/2 hours for one to show up. Very disappointing the crew can’t get schedules confirmed which wouldn’t have caused this issue.

Worst airline ever! The guy weighing my bag had his foot on the metal plate and when I called him out on it, I got this stupid little smirk. La is a scam and so is Spirit Airlines. All the flight attendants looked like they hated our flight just as much as we did.

Unclear pricing; ended up being charged an extra $52 just to get onboard

Spirit is awful. Too expensive for what you get. Stop nickel and diming.

Not good. No updates regarding the flight status until after the fact on the delays and then a cancellation.

would be great to get basic water, soda at least and stop charging for carry ons

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

I was not permitted on my flight and had to purchase another flight ticket to Las Vegas.

Everything went as planned. Crew was great. Seats were still not that comfortable.

Better to put road truck seat in plain it so uncomfortable can not adjustable and fill metal don’t have cushions at all it’s very hard to travel for five hours

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.