ONT - ATL

$84 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 10/23. 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 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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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

Wed, Oct 29 - Mon, Nov 3
Frontier Logo
6:53 am - 7:55 pmONT-ATL
10h 02m1 stop
Frontier Logo
7:30 am - 11:50 pmATL-ONT
19h 20m2 stops
$197Frontier
Find Deal
Mon, Oct 6 - Sun, Oct 12
Frontier Logo
10:28 pm - 6:08 amONT-ATL
28h 40m1 stop
Frontier Logo
8:54 pm - 7:49 amATL-ONT
13h 55m1 stop
$198Frontier
Find Deal
Wed, Oct 1 - Tue, Oct 7
Frontier Logo
8:59 pm - 6:18 pmONT-ATL
18h 19m1 stop
Frontier Logo
10:29 am - 11:50 pmATL-ONT
16h 21m1 stop
$199Frontier
Find Deal
Thu, Oct 2 - Sat, Oct 4
Frontier Logo
3:43 pm - 6:04 amONT-ATL
11h 21m1 stop
Frontier Logo
8:00 am - 7:54 pmATL-ONT
14h 54m2 stops
$201Frontier
Find Deal
Thu, Oct 2 - Wed, Oct 8
Frontier Logo
8:59 pm - 9:18 pmONT-ATL
21h 19m2 stops
Frontier Logo
10:29 am - 11:50 pmATL-ONT
16h 21m1 stop
$203Frontier
Find Deal
Thu, Oct 9 - Sun, Oct 12
Frontier Logo
12:32 pm - 9:24 amONT-ATL
17h 52m1 stop
Frontier Logo
6:35 am - 7:49 amATL-ONT
28h 14m1 stop
$205Frontier
Find Deal
Wed, Oct 1 - Sat, Oct 11
Frontier Logo
8:59 pm - 5:13 pmONT-ATL
17h 14m2 stops
Frontier Logo
10:05 pm - 7:49 amATL-ONT
12h 44m1 stop
$206Frontier
Find Deal
Wed, Oct 1 - Fri, Oct 3
Frontier Logo
8:59 pm - 6:18 pmONT-ATL
18h 19m1 stop
Frontier Logo
6:55 pm - 11:38 pmATL-ONT
7h 43m1 stop
$207Frontier
Find Deal
Fri, Nov 7 - Mon, Nov 10
Multiple Airlines Logo
10:40 pm - 6:09 amONT-ATL
28h 29m2 stops
Multiple Airlines Logo
7:30 am - 11:10 amATL-ONT
6h 40m1 stop
$220Multiple Airlines
Find Deal
Mon, Sep 29 - Mon, Oct 6
Multiple Airlines Logo
10:28 pm - 5:47 amONT-ATL
28h 19m2 stops
Multiple Airlines Logo
3:14 pm - 8:56 pmATL-ONT
8h 42m1 stop
$223Multiple Airlines
Find Deal

Everything you should know

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
Watch video
Watch video
Watch video
Watch video
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 13% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$197
Overall average: $371
Frontier
Wed 10/29Mon 11/3
ONT - ATL • 1 stop
Cheapest non-stop
$319
Typical prices: $364-589
Delta
Thu 10/30Tue 11/11
ONT - ATL • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Atlanta!
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
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, Thursday 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 December and January, where the average cost of round-trip tickets is $469 and $454 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 $352 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 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$84
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 10% 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 $84 for a one-way ticket and $197 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, JetBlue, Alaska Airlines, Hawaiian Airlines, 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?

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

  • 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 $414 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 $525 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 $174 or less one-way and $350 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 4242 reviews
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

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!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

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.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

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

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.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

After all the weather issues at least they got me to my destination the next day

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

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

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Was not able to watch most shows on the entertainment site. They would not load

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

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.

Dear All, I have harassment and accident with the flight attendant . This is my phone to talk 8168073567, please, leave phone message . Regards Emily,

Flight was on time but the amount of noise from several children and the kicking of my seat the entire flight was overwhelming.

Unbelievable check in horrible. Asked to print tickets at the gate after a delay

check in at security was a hassle being scanned. Spirit employees were helpful and professional.

Had a issue with catching flight due to airline, was unable to board flight

We sat on the tarmac for an hour waiting for a gate to deplane.

I liked how cheap it was but both my flights were delayed heavily

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.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

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

Information on your arrival and departure airports

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