Question 1

How popular is this Atlanta to Ontario flight route?

Accepted Answer

Flights from Atlanta Hartsfield-Jackson to Ontario have been viewed 1 times in the past calendar month.

Question 2

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

Accepted Answer

According to our current data, Frontier ($196), offers the cheapest pricing from Atlanta to Ontario. This flight start at 46% lower than the current average price 3 months from now.

Question 3

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

Accepted Answer

To ensure you get the cheapest price possible for a flight from Atlanta to Ontario, you should look to book at least 46 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

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

Accepted Answer

Currently, August is the cheapest month in which you can book a flight from Atlanta to Ontario (average of $246). Flying from Atlanta to Ontario in March is currently the most expensive (average of $328). 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.

Question 5

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

Accepted Answer

Travelers seeking maximum savings on their Atlanta to Ontario flight should consider departing on Wednesday at noon 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.

Question 6

Weekly flight availability from Atlanta to Ontario

Accepted Answer

The most flights from ATL to ONT are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Question 9

What are the cheapest flights from Atlanta to Ontario?

Accepted Answer

Looking at all options, your cheapest flight can be booked for $348. While the most popular route (Atlanta Hartsfield-Jackson - Ontario) can be booked for $198 on average our data indicates $414 when flying from Atlanta to Ontario.

Question 10

What are the most reliable airlines from Atlanta to Ontario?

Accepted Answer

The top 3 most reliable airlines when flying from Atlanta to Ontario are WestJet (83%), Delta (69%) and KLM (63%).

Question 11

What are the most popular airlines that fly from Atlanta to Ontario?

Accepted Answer

The most popular airlines flying from Atlanta to Ontario are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

Question 12

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

Accepted Answer

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 34% on your flight compared to booking on days when demand is much higher.

Question 13

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

Accepted Answer

Users have found that booking a flight from Atlanta to Ontario at least 46 days early can save you up to 66% on average compared to booking a flight this week. If booking 46 days before your flight isn’t an option for you, users have found flights from Atlanta to Ontario for as little as $242 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $413 for flights departing within the next 3 days.

Question 14

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

Accepted Answer

September is one of the best times of the year to fly to Ontario from Atlanta. Prices for September average $277 per person but you can even find prices for as low as $64. The most expensive prices can be found in the month of December. Opting for a September flight can save you 30% on your journey compared to booking in December

Question 15

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

Accepted Answer

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from Atlanta to Ontario by exploring options for tickets at noon.

Question 16

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

Accepted Answer

To fly from Atlanta to Ontario, you need to book a flight from Hartsfield-Jackson (ATL) to Ontario (ONT). Nonstop flights to Ontario from Atlanta Hartsfield-Jackson take 4h 15m on average. When it comes time to book airfare, you have a few options: there are 8 outbound flights from Hartsfield-Jackson to Ontario offered by 5 different airlines.

Question 17

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

Accepted Answer

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

Question 18

How can I find direct flights from Atlanta to Ontario?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Round-trip from	$196 (Booking.com)
One-way from	$53 (Priceline)
Popular in	December
Cheapest in	June
Average price	$295
Good round-trip deal	$399 or less
Good one-way deal	$348 or less

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$130	Average$240	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$131	Average$268	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$239	Average$472	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$256	Average$415	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$325	Average$417	FlexibilityNo cancel fee	On-time63%

$53+ Cheap flights from Atlanta to Ontario (ATL - ONT)

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Ontario are usually found in June or February, booked 46 days in advance, depart on a Saturday or Tuesday and return on a Saturday

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Cheapest flights from Atlanta to OntarioExplore the most affordable flight options available from Atlanta to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Explore the most affordable flight options available from Atlanta to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Atlanta to Ontario that are best for you.

Best time to book a flight from Atlanta to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Atlanta with our price prediction graph.

Cheapflights Insights

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

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

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

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

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

Find hourly flight availability from Atlanta to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 30, 2025.

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

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

Weekly flight availability from Atlanta to Ontario

Explore weekly flight availability from Atlanta to Ontario. 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 June 30, 2025.

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Frontier from Atlanta to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

How popular is this Atlanta to Ontario flight route?

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

What are the most reliable airlines from Atlanta to Ontario?

What are the cheapest flights from Atlanta to Ontario?

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

How can I find direct flights from Atlanta to Ontario?

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

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

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Cheapest flights from Atlanta to Ontario
Explore the most affordable flight options available from Atlanta to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.