Cheap flights from Atlanta to Ontario (ATL - ONT) from $72

This is the cheapest one-way flight price, found on 5/24. Prices may vary by date and flight preferences.
ATL — ONT
May 30 — Jun 61
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

The best prices from Atlanta Hartsfield-Jackson to Ontario are usually found in February or March, booked 32 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

How to find the cheapest flight from Atlanta (ATL) to Ontario (ONT)

All the information you need to plan the best ATL to ONT flight in 2023: compare Atlanta to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

Popular in

July

Cheapest in

February

Round-trip from

$233

One-way from

$110
High demand for flights, 25% potential price rise
Best time to find cheap flights, 45% potential price drop
From Atlanta Hartsfield-Jackson to Ontario
One-way flight from Atlanta Hartsfield-Jackson to Ontario

ATL - ONT

Price

$233 - $562

ONT

Temperature

53.6 - 78.8 °F

ONT

Rainfall

0.1 - 3.4 inches

Cheap flights from Atlanta to Ontario in May, June 2023

The best prices found for ATL to ONT flights for May, June
The lowest fares we've come across on flights traveling from Atlanta to Ontario in May and June 2023. Check back regularly for other flight deals.

Atlanta to Ontario 2023 flight deals

Cheap flights to Ontario from Atlanta found for this year
The lowest fares we've come across on flights traveling from Atlanta to Ontario in May and June 2023. Check back regularly for other flight deals.

Cheap Undisclosed Carrier flights from Atlanta to Ontario

Consider these cheap Undisclosed Carrier flights we've found departing from Atlanta to Ontario. It's recommended that users confirm their flight details before booking.

Cheap Frontier flights from Atlanta to Ontario

Some of the best deals we've found on Frontier flights traveling from Atlanta to Ontario. Check back soon if you're not seeing flights that suit your needs.

Non-stop flights to Ontario from Atlanta

Save time with Atlanta to Ontario direct flight deals
Take a look at some of the direct flights traveling from Atlanta to Ontario in the near future. Search for alternative flights from Atlanta to Ontario by utilizing the search form above.

Last minute flights from Atlanta to Ontario

Late deals on return flights to Ontario from Atlanta, departing today and this week
Have a look at some of the last-minute flights available departing from Atlanta to Ontario. Tip: verify your flight details before completing your reservation.

One-way flights to Ontario from Atlanta

The cheapest one-way flights from Atlanta to Ontario
Take a look at some of the one-way flights we've detected from Atlanta to Ontario. Those needing a return flight from Atlanta to Ontario can use the search form above.

Find flights from Atlanta to Ontario within your budget

Use the slider to find flights from Atlanta to Ontario that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$126 - $198

Route

Depart

Return

Price

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Wed 8/16

Nonstop4h 26m

Ontario

Thu 8/17

Nonstop4h 34m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sat 10/7

Nonstop4h 48m

Ontario

Tue 10/10

Nonstop4h 15m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Sat 9/9

Nonstop4h 32m

Ontario

Sat 9/16

Nonstop4h 22m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Tue 9/5

Nonstop4h 26m

Ontario

Wed 9/20

Nonstop4h 22m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Mon 6/5

1 stop15h 00m

Ontario

Tue 6/6

1 stop7h 31m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Wed 8/2

Nonstop4h 26m

Ontario

Wed 8/16

Nonstop4h 34m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Wed 8/30

Nonstop4h 26m

Ontario

Sun 9/3

Nonstop4h 33m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Mon 6/5

1 stop17h 51m

Ontario

Sat 6/10

1 stop17h 24m

Atlanta Hartsfield-JacksonOntario

ATL - ONT

ATLONT

Atlanta Hartsfield-Jackson

Tue 6/13

Nonstop4h 20m

Ontario

Mon 6/26

Nonstop4h 18m

Flights are sorted by cheapest first

Deals found on 5/24

Reviews of Airlines Servicing Ontario

Get a feel of what it's like to fly with Undisclosed Carrier and Frontier from Atlanta to Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.9
Fair
642 reviews

Comfort

5.6

Entertainment

4.6

Food

4.8

Overall

5.9

Crew

6.7

Boarding

6.1

Reviews

1 / 10

They knowingly delayed from 7pm till 2am, then cancelled it! Not a dime comped for having to travel to San Juan and wait two days for availability of next flight. My second attempt with Frontier, I couldn’t imagine it was be worse than the last. Wrong again…

Frontier
5.9
Fair
642 reviews
Frontier
5.9
Fair
642 reviews

Comfort

5.6

Entertainment

4.6

Food

4.8

Overall

5.9

Crew

6.7

Boarding

6.1

Reviews

1 / 10

They knowingly delayed from 7pm till 2am, then cancelled it! Not a dime comped for having to travel to San Juan and wait two days for availability of next flight. My second attempt with Frontier, I couldn’t imagine it was be worse than the last. Wrong again…

Related info for your journey

Useful info, stats and facts about Atlanta to Ontario flights.

Alternative routes for Atlanta to Ontario

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

Top 6 airlines flying from Atlanta to Ontario

The chart below displays the airlines Cheapflights users traveling from Atlanta to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Spirit AirlinesCheapest$133Average$253FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$141Average$227FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
United AirlinesCheapest$211Average$540FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
American AirlinesCheapest$312Average$566FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$358Average$597FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Alaska AirlinesCheapest$484Average$595FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights

Hourly flight availability from Atlanta to Ontario

See what time of day planes typically take off from Atlanta to Ontario
9%of flight departuresEarly morningMidnight to 6 am
54%of flight departuresMorning6 am to noon
18%of flight departuresAfternoonNoon to 6 pm
19%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Atlanta to Ontario

See how many times per day planes take to the skies headed from Atlanta to Ontario
Sunday7daily flights
Monday7daily flights
Tuesday5daily flights
Wednesday3daily flights
Thursday8daily flights
Friday6daily flights
Saturday4daily flights