Search & Compare - Atlanta to Ontario Flights & Tickets

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Cheap flights from Atlanta to Ontario (ATL to ONT)

Looking for a cheap last-minute deal or the best round-trip flight from Atlanta to Ontario? Find the biggest savings on one-way and round-trip tickets right here.

Recent airfare deals on Atlanta to Ontario

Delta Airlines  DL
Delta Airlines
Atlanta
2025-06-26
Ontario
2025-07-22
USD 375

One-way DL Nonstop fare found on 2025-06-03
Delta Airlines  DL
Delta Airlines
Atlanta
2025-06-26
Ontario
2025-07-22
USD 385

One-way DL fare found on 2025-06-03
Southwest Airlines  WN
Southwest Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 396

One-way WN fare found on 2025-06-03
Delta Airlines  DL
Delta Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 399

One-way DL Nonstop fare found on 2025-06-03
Delta Airlines  DL
Delta Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 419

One-way DL Nonstop fare found on 2025-06-03
Southwest Airlines  WN
Southwest Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 428

One-way WN fare found on 2025-06-03
United Airlines  UA
United Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 443

One-way UA fare found on 2025-06-03
United Airlines  UA
United Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 443

One-way UA fare found on 2025-06-03
Alaska Airlines  AS
Alaska Airlines
Atlanta
2026-01-08
Ontario
2026-01-11
USD 7631

One-way AS Nonstop fare found on 2025-06-03
Alaska Airlines  AS
Alaska Airlines
Atlanta
2025-06-26
Ontario
2025-07-22
USD 7631

One-way AS Nonstop fare found on 2025-06-03


*Prices are per person and are for e-tickets and include all taxes & fees in USD.
*Fareleaders always attempts to get accurate pricing, however, prices are not guaranteed.
*Fareleaders is not seller, we aggregate tones of data for you from other online travel agencies and external sources.

Facts to know while booking flights from Atlanta to Ontario

What are the airports in Atlanta?
ATL
What’s the most popular airline flying from ATL to ONT?
The most popular airline flying from Atlanta to Ontario are Southwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines
Can I fly from ATL to ONT non-stop?
Yes, you can fly ATL to ONT non-stop on Alaska Airlines, Delta Airlines
Which airlines fly nonstop between Atlanta and Ontario?
The non-stop flights between Atlanta and Ontario are Alaska Airlines, Delta Airlines.
What’s the earliest departure time from ATL to ONT Airport?
The earliest flight leaves ATL at 8:10 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my Atlanta to Ontario flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ATL to ONT?
Read the fare rules of the Atlanta to Ontario air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Atlanta and Ontario?
NULL, NULL, Star Alliance, Oneworld, SkyTeam operate flights between Atlanta and Ontario
How long does a flight from Atlanta to Ontario take?
It takes approximately 4 hour to fly non-stop from ATL to ONT, which is 1899.48 miles by air.
Which airlines provide the cheapest flights from Atlanta (ATL) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from ATL were found on Delta Airlines : USD 419
Do I need a passport to fly between ATL and ONT?
No
What’s the latest departure time from ATL to ONT ?
The last flight leaves ATL at 8:59 pm

Flights from Atlanta to Ontario

Origin AirportHartsfield Jackson Atlanta International , Atlanta, US
Destination AirportOntario International , Ontario, US
Served by AirlinesSouthwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines
Lowest PriceDelta Airlines : USD 419
Distance1899 miles

Airlines Flying from Hartsfield Jackson Atlanta International

Popular Routes

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