Atlanta

$63+ Cheap flights from Ontario to Atlanta (ONT - ATL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATL
Jul 8 — Jul 151
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Cheapflights Tip: The best prices from Ontario to Atlanta Hartsfield-Jackson are usually found in September or October, booked 81 days in advance, depart on a Saturday or Wednesday and return on a Saturday

Cheap flight deals from Ontario to Atlanta

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Atlanta (ATL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 3, 2025.

Round-trip from

$225
(Frontier)

One-way from

$63
(Priceline)

Popular in

December

Cheapest in

September

Average price

$456

Good round-trip deal

$385 or less

Good one-way deal

$216 or less
From Ontario to Atlanta Hartsfield-Jackson
One-way flight from Ontario to Atlanta Hartsfield-Jackson
Highest demand for flights based on searches. 7% potential increase in price ($34 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from Ontario to Atlanta Hartsfield-Jackson.
Price to beat on a one-way flight from Ontario to Atlanta Hartsfield-Jackson.

Find flight deals from Ontario to Atlanta

Cheapest flights from Ontario to Atlanta
Explore the most affordable flight options available from Ontario to Atlanta. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Frontier deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/145:21 pmONT - ATL
1 stop9h 49mFrontier
Tue 7/2210:30 amATL - ONT
1 stop8h 50mFrontier
Deal found 7/2$225

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Atlanta that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from Ontario to Atlanta that are best for you.

Fly from

Ontario

Fly to

Atlanta

Route

Depart

Return

Price

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Mon 7/14

5:21 pm-6:10 am

1 stop9h 49m

Atlanta Hartsfield-Jackson

Tue 7/22

10:30 am-4:20 pm

1 stop8h 50m

$225

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Fri 9/12

6:56 pm-6:04 am

1 stop8h 08m

$63

OntarioAtlanta

ONT - ATL

ONTATL

Ontario

Sat 8/30

12:04 pm-11:53 pm

1 stop8h 49m

$97

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Ontario to Atlanta

Have a flexible travel schedule? Discover the best time to fly to Atlanta from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Atlanta. Price data was last updated on June 27, 2025.

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Atlanta. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Atlanta?

Currently, August is the cheapest month in which you can book a flight from Ontario to Atlanta (average of $190). Flying from Ontario to Atlanta in June is currently the most expensive (average of $247). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to ATL?

Find hourly flight availability from Ontario to Atlanta. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Atlanta in the afternoon. If you’re flexible enough to do this you can expect to save up to 51% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Atlanta. Price data was last updated on June 29, 2025.

Travelers seeking maximum savings on their Ontario to Atlanta flight should consider departing on Monday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ontario to Atlanta

Explore weekly flight availability from Ontario to Atlanta. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 3, 2025.

The most flights from ONT to ATL are scheduled on a Tuesday (14 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Atlanta

Get insights into the airlines that provide service to Atlanta. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Atlanta. Reviews last updated July 3, 2025.
Read through reviews of airlines operating flights from Ontario to Atlanta, such as Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

5.9

Crew

6.8

Boarding

6.2

Comfort

5.6

Entertainment

4.5

Food

4.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

Overall

5.9

Crew

6.8

Boarding

6.2

Comfort

5.6

Entertainment

4.5

Food

4.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Atlanta. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports serve Atlanta from Ontario?

    If you're flying from Ontario to Atlanta, you'll hop on your plane at Ontario International Airport. Located two miles east of Downtown Ontario and roughly 38 miles east of Downtown Los Angeles, Ontario International Airport is one of the most used airports in California and its surrounding states. In Atlanta, your plane will touch down at Hartsfield-Jackson Atlanta International Airport. Commonly referred to as ATL, this airport usually has lots of human traffic as it is the second-busiest airport in the world. If you've not made arrangements to be picked up from this airport, worry not, as the airport allows for numerous cab drivers to pick up departing passengers. Given that the airport's professionals are quite knowledgeable, don't hesitate to contact them if you get lost or need assistance.

  • Which airlines fly directly to Atlanta from Ontario?

    If you'd like to fly directly to Atlanta from Ontario, you're in luck as Delta Air Lines offers nonstop Ontario to Atlanta flights. Delta Air Lines, just like most other airlines, often require that their passengers reach the airport 2h before their scheduled flight departs. The airlines demand that passengers arrive this early to check-in, have their luggage inspected, and sort out any issues that may need resolving before it's too late. As this is the case, if you book a Delta Air Lines flight, it's in your best interest to reach the airport 2h before your plane leaves.

  • What are the layover options between Ontario and Atlanta?

    There are a good number of layover options between Ontario and Atlanta. The most notable stop options include Salt Lake City, Denver, and Dallas. If you choose a flight that stops in Denver, you'll land at Denver International. Regarded as one of the most exceptional airports globally, this airport has several duty-free shops, top-notch restaurants, clean washrooms, and adequately large lounges. Given that it has all these features, it's safe to say that you'll have a good time at this airport. If you book a flight that will stop in Dallas, you'll land at Dallas/Fort Worth International Airport. Home to several boutiques, accomplished spas, and affordable restaurants, you'll greatly enjoy a layover at this airport.

  • Do I need a passport or visa to fly from Ontario to Atlanta?

    Flights from Ontario to Atlanta are domestic flights. For domestic flights, U.S. citizens don't need a visa. Instead, you can use documents such as a U.S. passport card, an accepted driver's license, a permanent resident card, or even a U.S. citizenship and immigration services employment authorization card. If you get to the airport and notice that you've misplaced the documents you require to be allowed to board, don't stress. Instead, call one of the TSA officers at the airport. When you do, you’ll be assisted accordingly.

  • What airports do I use to fly from Ontario to Atlanta?

    To fly from Ontario to Atlanta, you need to book a flight from Ontario (ONT) to Hartsfield-Jackson (ATL). Nonstop flights to Atlanta Hartsfield-Jackson from Ontario take 4h 06m on average. When it comes time to book airfare, you have a few options: there are 12 outbound flights from Ontario to Hartsfield-Jackson offered by 6 different airlines.

  • How popular is this Ontario to Atlanta flight route?

  • What is the cheapest airline to fly from Ontario to Atlanta round-trip?

    According to our current data, Frontier ($225), offers the cheapest pricing from Ontario to Atlanta. Frontier is priced at 43% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Ontario to Atlanta?

    No one likes to see their flight delayed. When booking a flight from Ontario to Atlanta consider choosing Aeromexico (95%), LATAM Airlines (91%) or KLM (91%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Ontario to Atlanta?

    On average you can expect to pay $642 for a flight from Ontario to Atlanta. The cheapest flight overall is $145 while the most popular route, (Ontario - Atlanta Hartsfield-Jackson) is currently priced at $192.

  • Where are the most common layover locations when flying from Ontario to Atlanta?

  • What are some popular things to do or see while on a layover in Las Vegas?

    If you're on a layover in Las Vegas and looking for things to do, consider visiting Fremont Street Experience, The Colosseum at Caesars Palace, or Fountains of Bellagio. Travelers on a layover in Las Vegas can visit Fremont Street Experience, The Colosseum at Caesars Palace, and Fountains of Bellagio, by traveling 5.9 mi, 2.6 mi, and 2.3 mi, respectively after landing at Las Vegas Harry Reid Intl. Those landing in Las Vegas looking to spend some time exploring during their layover can rent a car for about $54 per day.

  • What are some popular points of interest to see during a layover in Dallas?

    If you're on a layover in Dallas and looking for things to do, consider visiting American Airlines Center, Dallas World Aquarium, or Reunion Tower. American Airlines Center, Dallas World Aquarium and Reunion Tower are located about 15.0 mi, 15.5 mi, and 15.6 mi, respectively from Dallas/Fort Worth if you are interested in checking them out. Those looking to explore during their layover in Dallas can rent a car from Dallas/Fort Worth for about $53 per day.

  • Where are the least popular layover locations for Ontario to Atlanta flights?

  • Can I find deals for flights from Ontario to Atlanta that include hotel bookings?

    Yes. In addition to deals on Ontario to Atlanta flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Atlanta?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Atlanta.

  • Can I find deals for business class flights from Ontario to Atlanta?

    Yes. Cheapflights offers flight deals from Ontario to Atlanta by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Atlanta?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Atlanta (average of $190). Flying from Ontario to Atlanta in June is currently the most expensive (average of $247). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Duluth
College Park
McDonough
Auburn
Marietta
Stone Mountain
Norcross
Lawrenceville
Sandy Springs
Conyers
Douglasville
Acworth
Morrow
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Smyrna
Stockbridge
Kennesaw
Cumming
Suwanee

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Alternative routes for Ontario to Atlanta

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Ontario to Atlanta

Discover the top 6 airlines that operate flights from Ontario to Atlanta. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$67Average$193FlexibilityNo cancel feeOn-time65%
FrontierCheapest$142Average$251FlexibilityNo cancel feeOn-time62%
DeltaCheapest$255Average$486FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$416FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$286Average$474FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$340Average$416FlexibilityNo cancel feeOn-time63%

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