ONT - ATL

$113 Find Cheap Flights from Ontario to Atlanta - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Atlanta departing on 7/14. 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 Atlanta

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Atlanta, 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 Ontario to Atlanta, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$292
Typical prices: $546-$299
Frontier
Sun 9/6Tue 9/15
ONT - ATL • 1 stop
Cheapest non-stop
$439
Typical prices: $584-$379
Delta
Fri 8/21Tue 9/1
ONT - ATL • Non-stop
Top airlines
Cheapest • from $292 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Delta. Average duration is 4h 20m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $325 (round-trip)
Shortest trip • 5h 45m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 14% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Ontario to Atlanta (ONT-ATL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Atlanta 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 Ontario to Atlanta

Sun, Sep 6 - Tue, Sep 15
Frontier Logo
6:00 am - 4:58 am
ONT
-
ATL
19h 58m
1 stop
Frontier Logo
9:01 pm - 4:10 pm
ATL
-
ONT
22h 09m
1 stop
$292Frontier
Tue, Aug 11 - Sun, Aug 16
Frontier Logo
1:38 pm - 1:50 pm
ONT
-
ATL
21h 12m
1 stop
Frontier Logo
4:55 pm - 11:02 am
ATL
-
ONT
21h 07m
1 stop
$293Frontier
Thu, Sep 24 - Wed, Sep 30
Frontier Logo
2:58 pm - 5:03 am
ONT
-
ATL
11h 05m
1 stop
Frontier Logo
1:18 pm - 8:54 pm
ATL
-
ONT
10h 36m
1 stop
$294Frontier
Mon, Aug 3 - Wed, Aug 5
Frontier Logo
9:32 am - 11:24 pm
ONT
-
ATL
10h 52m
1 stop
Frontier Logo
11:07 am - 3:14 pm
ATL
-
ONT
7h 07m
1 stop
$295Frontier
Sun, Aug 2 - Tue, Aug 11
Frontier Logo
8:58 am - 6:07 am
ONT
-
ATL
18h 09m
1 stop
Frontier Logo
9:25 pm - 11:50 pm
ATL
-
ONT
29h 25m
2 stops
$296Frontier
Fri, Jul 24 - Fri, Jul 31
Frontier Logo
9:32 am - 9:44 am
ONT
-
ATL
21h 12m
1 stop
Frontier Logo
8:45 am - 7:32 am
ATL
-
ONT
25h 47m
1 stop
$297Frontier
Tue, Jun 30 - Wed, Jul 8
Frontier Logo
3:34 pm - 9:45 pm
ONT
-
ATL
51h 11m
2 stops
Frontier Logo
8:45 am - 7:32 am
ATL
-
ONT
25h 47m
1 stop
$299Frontier
Mon, Jul 20 - Tue, Jul 28
Frontier Logo
8:58 am - 7:07 am
ONT
-
ATL
19h 09m
1 stop
Frontier Logo
12:33 pm - 11:50 pm
ATL
-
ONT
14h 17m
1 stop
$300Frontier
Sat, Aug 8 - Sat, Aug 15
Frontier Logo
8:58 am - 7:07 am
ONT
-
ATL
19h 09m
1 stop
Frontier Logo
9:25 pm - 7:32 am
ATL
-
ONT
13h 07m
1 stop
$301Frontier
Wed, Jul 8 - Tue, Jul 21
Frontier Logo
6:00 am - 5:02 am
ONT
-
ATL
20h 02m
1 stop
Frontier Logo
6:07 am - 7:32 am
ATL
-
ONT
28h 25m
1 stop
$302Frontier
Booking Insights

KAYAK's insights & trends for Ontario to Atlanta flights

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

How much is a round-trip flight from Ontario to Atlanta?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Atlanta departing in September.

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

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

If you are looking for a flight deal from Ontario to Atlanta, look for departures on Fridays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Atlanta, Tuesday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Atlanta, 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 Ontario to Atlanta is February, where tickets cost $382 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $489 and $479 respectively.

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

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.

No, with an average price for the route of $464, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Atlanta, 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 Ontario to Atlanta, you should book around 2 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Atlanta

 
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 seasonJanuary
Cheapest flight$113
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 7% increase in price.
Flight from Ontario to Atlanta

When to book flights from Ontario to Atlanta

Are your dates flexible? Find out the best times to travel from Ontario to Atlanta 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 Ontario to Atlanta

  • Where do I park my car at Ontario Airport?

    There are several types of parking lots at Ontario International Airport, each with a different price range. These parking lots, including one on Terminal 1 that includes a cell phone lot and is accessible from the west of Airport Drive. Parking Lot D is located at the International Arrivals Terminal. Parking Lots 2 and 3 are located at Terminals 2 and 4, respectively. Parking Lot 5 is located close to the rental vehicle facility on Terminal Way's eastern side. The airport shuttle service is available in Lot 5.

  • Where can I have a meal at Ontario Airport?

    The Ontario Airport (ONT) offers a choice of culinary alternatives if you wish to have a snack before your trip. Wolfgang Puck Pizza and Harvest & Grounds are located at Terminal 2. Additionally, the restaurants in Terminal 4 are Coffee Bean & Tea Leaf, Einstein Bros. Bagels, and Rock & Brews.

  • Where are the nursing stations located at the Atlanta Airport?

    Airport lactation pods provide nursing mothers traveling through Hartsfield-Jackson Atlanta International Airport with intimate and private areas to care for their babies. The suites have benches, breast pump sockets, and diaper-changing tables. After security has arrived, they can be found in the arrivals area to the west of the domestic terminal.

  • Can I rent a car at Hartsfield-Jackson Atlanta International Airport?

    The Rental Car Center, a separate building on the airport property, handles on-site car rental pickups and returns. The Rental Car Center is easily reachable via the Atlanta SkyTrain. The Rental Car Center is served by various agencies including Advantage, Alamo, Avis, Budget, National, Dollar, Enterprise, Hertz, SIXT, Payless, and Thrifty.

  • What is the cheapest flight from Ontario to Atlanta?

    In the last 5 days, the lowest price for a flight from Ontario to Atlanta was $113 for a one-way ticket and $292 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

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

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

  • Which airline alliances offer flights from Ontario to Atlanta?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Atlanta are Delta and Southwest. With an average price for the route of $527 and an overall rating of 7.9, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $447 and an overall rating of 7.9.

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

    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 Ontario to Atlanta.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Atlanta from Ontario 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 Ontario to Atlanta?

    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 Atlanta with an airline and back to Ontario with another airline. Booking your flights between Ontario and ATL 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 Ontario to Atlanta?

    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 Atlanta from Ontario 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 Ontario to Atlanta

  • Looking for a cheap flight? 25% of our users found flights on this route for $234 or less one-way and $439 or less round-trip.
  • Traveler Aid, which is a non-profit group, helps passengers who are stranded at Ontario International Airport (ONT). Volunteers help travelers with everything from general questions about the airport to finding lost items. They are found in Terminals 2 and 4 between the baggage claim and the escalator.
  • There are shuttles that travel between ONT Parking Lot 5, the ConRAC building, and the airport terminals. These shuttles run at least every 20 minutes between the hours of 12 am and 3 am, and as frequently as every 5 minutes during busy hours.
  • Travelers arriving at Hartsfield-Jackson Atlanta International Airport (ATL) can stroll by the rotating exhibits of photographs, paintings, and sculptures, in addition to the permanent artwork on display. Concerts by musicians are also held in the Atrium.
  • Pet relief areas are located in each concourse of the Atlanta Airport next to Gates T7, A10, C19, E14, F7, and the D-Midpoint. A pet relief area is available in the International Terminal arrivals area, while the South Ground Transportation section has a 1,000-square-foot dog park outside doors W1 and W2.
  • At the Atlanta Airport, there are prayer rooms and a multifaith chapel that offers Catholic, Christian, and Muslim services. The Concourse E Chapel is located behind the Martin King Jr. Exhibit, and theConcourse F Chapel is at the International Atrium on level 2, Domestic Terminal Chapel, landside.

Prefer to fly direct from Ontario to Atlanta?

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

Direct departures

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

Direct returns

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

Reviews of the top 5 airlines serving from Ontario to Atlanta

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Atlanta. 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 Ontario to Atlanta? 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.
7.9
SouthwestOverall score based on 4235 reviews
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
Airline reviews

Kayak could’ve posted the correct gate number. Almost missed my flight.

8.0 ExcellentValerie, Jun 2026
MCO - ATL
Read more Southwest reviews

Kayak could’ve posted the correct gate number. Almost missed my flight.

Was fine, delayed and feels like southwest is always late

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Connection flights should be spaced out farther because too close I missed my connection.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Planes were clean, no water or snacks on either flight.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Aside from a completely packed plane, I really have no complaints.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

Take-off delayed an hour because of a missing flight officer, so,arrived in Charlotte lates causing many passengers to miss connections. Otherwise a very good flight, safe and comfortable, with an excellent professional crew.

The flight from LA to Chicago was smooth and service was very good overall.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

Airlines should be prohibited from using the seats they get away with.

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

JetBlue worker, Blythe, was so amazing at the DCA counter. If it wasn’t for her, I’m not sure we would’ve made it through. Please thank her!

They lost my luggage and refuse to help. Terrible airline. I've never experienced worse customer service in my life. Pretty much just told me too bad that I lost all my luggage, not caring that I am stuck in Europe for 2 weeks with absolutely nothing.

You should have had Wifi to make it much enjoyable.

The flight out was delayed from 3:40pm to 5pm and again to 8pm. We boarded after 5pm, had to disembark because they could not get the Engine started, then we switched gates and got a new plane and did not board until after 8pm.

The flight was delayed after already taxiing from the gate due to a malfunction. After 3 hours we were told the flight was canceled. The next flight available was Sunday. My daughter and I stayed overnight in the airport due to this issue. I was given a $12 meal voucher. Unacceptable

Whole experience was poor. Delayed 2 hours. Lied about the delays. Was all jet blues fault and tried to blame on air traffic control. Sent out other let trips and wouldn't allow people to switch aircraft.

My bag was not loaded on my flight. it was not communicated to me until i was waiting for my bag at my destination. there was no confirmation of when my bag was arriving and no way to track it.

Nice plane, clean, wifi available and movies. All the flight attendants were courteous.

The gate attendant in Boston had a high raspy voice and spoke much too fast to be understood. Not pleasant.

The flight was delayed for more than 3 hours the flight attendant was so angry, it was my first flight with JetBlue but i don’t think I flight with them again.

They didn’t offer a water, even after I asked

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

I loved the staff on the plane. So friendly and helpful! However, there was an argument and misunderstanding by the staff and a customer at the gate, and the staff member was being unprofessional. When we arrived in Atlanta, we waited 1.5 hrs for our luggage to arrive. When I asked the airport attendant, they said Frontier had the longest wait for luggage out of any airlines, and that they could not be held responsible for the delay.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

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

Information on your arrival and departure airports