ONT - ATL

$63 Find Cheap Flights from Ontario to Atlanta

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 1/13. 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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Atlanta.
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Everything you should know

Cheapest round-trip
$164
Overall average: $439
Frontier
Tue 12/9Wed 12/17
ONT - ATL • 1 stop
Cheapest non-stop
$399
Typical prices: $459-$688
Delta
Wed 12/10Sun 12/14
ONT - ATL • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
ONT provides a stress-free departure with easy parking.
Use MARTA rail for a smooth arrival at ATL.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Atlanta
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When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 27% compared to booking last minute.
Insights
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Insights
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When to travel
April
Cheapest • 13% price drop
November
Most popular
Good to know
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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

Tue, Dec 9 - Wed, Dec 17
Frontier Logo
12:30 pm - 9:25 amONT-ATL
17h 55m1 stop
Frontier Logo
7:30 am - 5:22 pmATL-ONT
36h 52m2 stops
$164Frontier
Find Deal
Tue, Dec 2 - Tue, Dec 9
Frontier Logo
12:30 pm - 9:25 amONT-ATL
17h 55m1 stop
Frontier Logo
11:01 am - 9:17 pmATL-ONT
37h 16m2 stops
$167Frontier
Find Deal
Sat, Nov 15 - Tue, Nov 18
Multiple Airlines Logo
6:53 am - 5:23 pmONT-ATL
7h 30m1 stop
Multiple Airlines Logo
9:15 am - 9:27 pmATL-ONT
15h 12m2 stops
$169Multiple Airlines
Find Deal
Sat, Nov 15 - Wed, Nov 19
Multiple Airlines Logo
6:53 am - 5:23 pmONT-ATL
7h 30m1 stop
Multiple Airlines Logo
9:50 pm - 11:11 amATL-ONT
16h 21m2 stops
$172Multiple Airlines
Find Deal
Thu, Dec 11 - Wed, Dec 17
Multiple Airlines Logo
7:33 pm - 9:25 amONT-ATL
10h 52m1 stop
Multiple Airlines Logo
7:00 am - 9:17 pmATL-ONT
17h 17m1 stop
$173Multiple Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
Frontier Logo
6:15 am - 3:59 pmONT-ATL
6h 44m1 stop
Frontier Logo
12:51 pm - 11:31 pmATL-ONT
13h 40m2 stops
$174Frontier
Find Deal
Thu, Nov 13 - Wed, Nov 19
Frontier Logo
6:53 am - 6:50 pmONT-ATL
8h 57m1 stop
Frontier Logo
10:13 am - 8:42 pmATL-ONT
13h 29m1 stop
$176Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
7:22 am - 4:53 pmONT-ATL
6h 31m1 stop
Frontier Logo
7:30 am - 11:10 amATL-ONT
6h 40m1 stop
$178Frontier
Find Deal
Fri, Nov 14 - Sat, Nov 15
Frontier Logo
1:46 pm - 9:29 amONT-ATL
16h 43m1 stop
Frontier Logo
6:29 pm - 11:50 pmATL-ONT
8h 21m1 stop
$179Frontier
Find Deal
Thu, Nov 13 - Thu, Nov 20
Frontier Logo
7:22 am - 4:53 pmONT-ATL
6h 31m1 stop
Frontier Logo
9:15 pm - 7:20 amATL-ONT
13h 05m1 stop
$183Frontier
Find Deal
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.

Find cheap flights to Atlanta
Find cheap flights to Atlanta

Planning a trip from Ontario to Atlanta? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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 Tuesdays 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 April, where tickets cost $355 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $457 and $439 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.

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 $388 on average.

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 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Atlanta

 
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
ONT

ONT offers a stress-free departure with streamlined security and ample parking, making it ideal for both business and leisure travelers.

Read more about ONTby Jennifer Simonson
ATL

Use MARTA rail to avoid Atlanta's traffic; it connects directly to ATL and operates until late night.

Read more about ATLby Blane Bachelor
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

Good to know

Low seasonMarch
Cheapest flight$63
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 5% lower on average.
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 3 days, the lowest price for a flight from Ontario to Atlanta was $63 for a one-way ticket and $164 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, American Airlines, and Hawaiian 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?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Atlanta, with Star Alliance 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, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Atlanta are Southwest and Delta. With an average price for the route of $416 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 $544 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 $189 or less one-way and $337 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.
8.0
SouthwestOverall score based on 4240 reviews
8.1Boarding
7.5Entertainment
7.0Food
8.6Crew
8.0Comfort
Airline reviews

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.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

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.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

Non stop on long haul is the way to go. Great experience

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

The boarding process needs to be refined. Sometimes the gate crew call out the boarding zone, and then flip to the monitor to show which zones are boarding. So unless everyone is gathered around to see the monitor there is usually confusion as wi which zones are boarding.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

They made us board and then deboard due to mechanical issue which delayed the departure by almost 2 hours and we barely made our connecting flight. These quality checks should've been done before boarding not after.

I liked the friendliness of the staff. The cleanliness of all 3 planes.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The gate agents for spirit at EWR wouldn’t give me my ticket to board when I arrived 50 min from the flight, saying that I wouldn’t make my flight. They tried to reschedule me to arrive at my destination 14 hours after the original flight, which included a 10 hr layover in another city. I rebooked with another airline and it took me a total of 5 min to go through security. Then I see a charge on my card for a $100 change fee that I did not approve. Beware of this horrible place and these horrible people

Seats are not very comfortable, maybe a little more padding for a 2hr plus flight

Vegas is such a quick flight that amenities aren’t the important part, in my opinion. Just get me there efficiently and safely, and that’s exactly what they did!

The flight was severely delayed due to the missing flight attendants.

Absolutely horrible. Usually pay $40-$50 to check luggage in. I tried to check my suitcase in and the price is raised to $70. That's ridiculously greedy c'mon. I had to leave my suitcase with all my clothes and hygiene products and repurchase once i landed in Atlanta. You guys make it really stressful to travel. Don't even want to travel anymore.

The delays and the lack of communication and organization within the airport itself for Staffing this flight and coordinating the paper log necessary to depart was ridiculous and deplorable

Flight was cancelled without warning close to flight date. Stuck witha credit has to buy a new ticket from another airline in either to get to location. Email cancelling was lost in mail.

Spirit Airlines was ok but TRAVELHELPDESK, the 3rd party travel agent IS A JOKE! VERY RUDE CUSTOMER AGENTS ont he phone. NO HELP AT ALL. But the airlines was ok.

No frills - because you get what you pay for. The crew was amazing!! I had plenty of room to spread out because the flight was half full. Which made it easy to sleep.

The staff was very very rude in Las Vegas when boarding the flight. When presenting the boarding ticket. Las Vegas flight, it was hot and stuffy, it smelled really bad.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Bag should not be so much money. This is how Frontier takes advantage of customers

The plane was comfortable. The time to board was way too slow and very unorganized! The crew was not as friendly as normally. The was not a single time that they offered water nor anything!!!

This was a full flight and I was in Zone 1, however upon boarding, several other zones went in ahead of me, leaving no overhead cabin space near my seat. This created a challenging disembarkment process.

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

Information on your arrival and departure airports

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