$171 Cheap American Airlines flights from Atlanta to Ontario (ATL to ONT)

Find The Best Day To Fly from Atlanta to Ontario

Amazing American Airlines ATL to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $372 round trip and $171 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Oct 6 - Wed, Oct 15
ATL
Atlanta
ONT
Ontario
$372 Roundtrip, found 12 hours ago
$372
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Mon, Oct 6 from Atlanta to Ontario, returning Wed, Oct 15, priced at $372 found 12 hours ago

ONT From ATL Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Hotel Seville

Hotel Seville

2 out of 5
per person
Sep 4 - Sep 8
found 1 day ago
Roundtrip flight included
Atlanta (ATL) to Ontario (ONT)
@Marbella Lane - Serene Haven Retreat

@Marbella Lane - Serene Haven Retreat

3 out of 5
per person
Jul 28 - Aug 1
found 23 hours ago
Roundtrip flight included
Atlanta (ATL) to Ontario (ONT)
Azure Hotel & Suites, Trademark Collection by Wyndham

Azure Hotel & Suites, Trademark Collection by Wyndham

3 out of 5
per person
Sep 4 - Sep 8
found 1 day ago
Roundtrip flight included
Atlanta (ATL) to Ontario (ONT)
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Frequently asked questions

Can I catch a flight from Hartsfield--Jackson Atlanta International Airport to Los Angeles - Ontario Intl. Airport (ONT) right now?
It's always prudent to find out about any quarantine requirements and travel advice reports in place in your destination city. Ensure you go to our Covid-19 Travel Advisor for up-to-date info on catching a flight to Los Angeles - Ontario Intl. Airport (ONT) from Hartsfield--Jackson Atlanta International Airport.
What terminal is American Airlines at Atlanta Airport?
Before you fly from Atlanta Airport to ONT with American Airlines, it might be a good idea to contact the airline to find out your terminal information. While your ticket should contain some of the relevant details, there's no guarantee.
Are there American Airlines non-stop flights from ATL to ONT?
As you can't fly direct from Atlanta Airport to Ontario Airport with American Airlines, make the most of your stopover. Sit down to a few drinks at a comfortable airport bar, or wander about the terminal and indulge in some retail therapy.
How long is an American Airlines flight from ATL to ONT?
Bring that book you've been eager to read. A flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Ontario Airport with American Airlines takes on average 5 hours and 51 minutes. You'll have enough time to get totally swept up in the enthralling plot.
How many direct and indirect flights does American Airlines fly from ATL to ONT?
You can decide between roughly 5 flights per day with American Airlines from Atlanta Airport to Ontario Airport.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Los Angeles - Ontario Intl. Airport (ONT), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.
American Airlines Airports
Hop on a(n) American Airlines flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
DFWUSADallas-Fort Worth Intl.599
CLTUSACharlotte-Douglas Intl.536
ORDUSAO'Hare Intl.317
PHLUSAPhiladelphia Intl.247
MIAUSAMiami Intl.193
DCAUSARonald Reagan Washington National152
PHXUSASky Harbor Intl.141
LAXUSALos Angeles Intl.81
LGAUSALaGuardia72
BOSUSALogan Intl.57

Travelers ❤️ these 🏨 after their flight to Ontario

Ontario Airport Hotel & Conference Center

Ontario Airport Hotel & Conference Center

3.5 out of 5
700 N Haven Ave, Ontario, CA
This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public ...
8.6/10 Excellent! (2,866 reviews)
"Very good"

Reviewed on Jul 16, 2025

Ontario Airport Hotel & Conference Center
La Quinta Inn & Suites by Wyndham Ontario Airport

La Quinta Inn & Suites by Wyndham Ontario Airport

3 out of 5
3555 Inland Empire Blvd, Ontario, CA
This hotel features an outdoor pool and a gym. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public areas, and free airport ...
8.2/10 Very Good! (1,902 reviews)
"The stuff was rude"

Reviewed on Jul 15, 2025

La Quinta Inn & Suites by Wyndham Ontario Airport
Ontario Airport Inn

Ontario Airport Inn

2.5 out of 5
1801 E G St, Ontario, CA
This hotel doesn't skimp on freebies - guests receive free buffet breakfast, free self parking, and a free airport shuttle. Traveling on business? Take advantage ...
8.6/10 Excellent! (1,567 reviews)
"I had a great time at this place. It was peaceful."

Reviewed on Jul 15, 2025

Ontario Airport Inn
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.