Atlanta to Ontario (ATL-ONT): nonstop upgrade & award space

Delta Air Lines flies nonstop between Atlanta (ATL) and Ontario (ONT), roughly 19 times a week. In the timetable below it flies as DL 665, DL 779, and DL 2891, scheduled at 4h 31m to 4h 43m for the 1,895 miles. 2LNR checks confirmed upgrade and award space on Delta Air Lines flights on this route, so you can see which departures have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

Updated .

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19
Flights a week, 4-week average
4h 31m to 4h 43m
Scheduled flight time
1,895 mi
Nonstop distance
Free
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Atlanta to Ontario flight schedule

Scheduled nonstop departures for ATL to ONT starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Atlanta (ATL) to Ontario (ONT)
Date Flight Airline Departs ATL Arrives ONT Duration Aircraft
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:5118:224h 31mAirbus A321
DL 779Delta Air Lines20:2021:544h 34mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:5118:224h 31mAirbus A321
DL 779Delta Air Lines20:2021:544h 34mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines17:5919:304h 31mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:5118:224h 31mAirbus A321
DL 779Delta Air Lines20:2021:544h 34mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:5118:224h 31mAirbus A321
DL 779Delta Air Lines20:2021:544h 34mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:3518:184h 43mAirbus A321
DL 779Delta Air Lines18:5420:254h 31mAirbus A321
DL 665Delta Air Lines09:3011:064h 36mAirbus A321
DL 2891Delta Air Lines16:3518:184h 43mAirbus A321
DL 779Delta Air Lines18:5420:254h 31mAirbus A321

Showing all 20 scheduled ATL to ONT departures across 7 days with service, starting October 22, 2026. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every ATL to ONT date on the interactive map

Aircraft on the Atlanta to Ontario nonstop

Delta Air Lines flies the Airbus A321 on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on ATL to ONT departures

2LNR tracks confirmed upgrade and award space on Delta Air Lines, segment by segment and date by date. Open the calendar for Atlanta to Ontario to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

Delta Air Lines award space was open on all 14 Atlanta to Ontario departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026.

See real availability

Confirmed upgrade or award seats by date on the ATL to ONT departures 2LNR tracks, checked against live inventory so you know what's open before you book.

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Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking.

Plan on the map

See ATL to ONT on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Atlanta to Ontario nonstop

Carriers operating ATL to ONT nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See ATL to ONT on the interactive map →

Frequently asked questions about ATL to ONT

How long is the flight from Atlanta (ATL) to Ontario (ONT)?
Scheduled flight times from Atlanta (ATL) to Ontario (ONT) run from 4h 31m to 4h 43m across the departures in the schedule table on this page. The nonstop covers about 1,895 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from ATL to ONT?
Delta Air Lines is currently the only airline flying ATL to ONT nonstop. 2LNR tracks confirmed upgrade and award space on Delta Air Lines.
How many flights a week are there from ATL to ONT?
About 19 nonstop flights a week run between Atlanta (ATL) and Ontario (ONT) in the current schedule, operated by Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from ATL to ONT depart?
Scheduled ATL to ONT nonstops in the next 7 days with service leave between 09:30 and 20:20, local time at Atlanta. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate ATL to ONT nonstop?
In the schedule table on this page, ATL to ONT nonstops fly as DL 665, DL 779, and DL 2891 on Delta Air Lines. The table lists each departure by date with its times and aircraft.
How do I check upgrade or award availability on ATL to ONT?
Open the ATL to ONT route on the interactive map or the matrix to see confirmed upgrade and award space by date on Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

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See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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