Cheap flights from Ontario to Atlanta from $66

The month of August is, on average, the cheapest month to fly to Atlanta from Ontario, with most prices found around $378. If you aren’t able to travel to Atlanta during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $383.

Our data shows that Wednesday is the least expensive day to fly to Atlanta. Tickets to fly out on this day can be as low as $422. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Atlanta on Sunday is $545.

The cheapest time of day to fly to Atlanta is at noon when flights can be purchased for as low as $322. Flights to Atlanta are more costly in the morning, with an average ticket price of $517. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Ontario to Atlanta Hartsfield-Jackson for the best Ontario - Atlanta Hartsfield-Jackson flight prices

You are more likely to see cheaper flights to Atlanta from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Atlanta for around $452 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Atlanta from Ontario for as low as $390 on momondo.

There are 4 cabin classes available to choose from on Ontario to Atlanta flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, Alaska Airlines, and United Airlines are the most popular carriers operating from Ontario to Atlanta Hartsfield-Jackson

Frontier, Delta and American Airlines are the top three most popular airlines that fly to Atlanta from Ontario according to our data. Frontier is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Atlanta. Keep in mind that there are 7 different airlines that fly to Atlanta on a routine basis, so you have a few additional options to choose from.

The number of flights available between Ontario and Atlanta is 8 per day as of August 2026. The most frequent departure time is 7:00AM, with 44% of daily flights leaving at noon.

57 flights are operational weekly from Ontario to Atlanta as of August 2026. The most popular departure day for this route is Fri, with 23% of flights per week taking off on this day.