Atlanta (ATL) to Ontario (ONT)
Flight time
≈ 4h 35m
Bearing
280° W
Atlanta (ATL) to Ontario (ONT) is 1,895 miles (3,050 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies ATL–ONT
Filed traffic dataIn June 2026, Delta Air Lines was the only carrier flying nonstop ATL–ONT; the Airbus A321 was the most common aircraft at 100% of departures; flights ran 91% full.
Departures
155
June 2026
Seats
29,359
both directions
Passengers
26,851
both directions
Load factor
91.5%
RPM ÷ ASM
Who flies ATL–ONT?
Delta Air Lines was the only carrier to fly nonstop ATL–ONT in June 2026 (155 departures).
- DL
155 departures · 29,359 seats
Share of departures100.0%91.5%
Load
What plane flies ATL–ONT?
In June 2026, the Airbus A321 flew 100% of ATL–ONT departures.
- Airbus A321
155 departures · 91.5% load
100.0%
How has ATL–ONT traffic changed?
Nonstop ATL–ONT departures fell from 172 in July 2025 to 155 in June 2026.
Monthly nonstop ATL–ONT traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
172 departures · 28,717 passengers
88.2%
Load
August 2025
162 departures · 27,207 passengers
88.7%
Load
September 2025
157 departures · 26,103 passengers
87.8%
Load
October 2025
171 departures · 27,848 passengers
86.0%
Load
November 2025
166 departures · 25,718 passengers
81.9%
Load
December 2025
170 departures · 28,167 passengers
87.5%
Load
January 2026
123 departures · 19,299 passengers
83.0%
Load
February 2026
112 departures · 18,015 passengers
84.8%
Load
March 2026
118 departures · 19,661 passengers
87.7%
Load
April 2026
155 departures · 25,510 passengers
86.9%
Load
May 2026
183 departures · 30,462 passengers
87.9%
Load
June 2026
155 departures · 26,851 passengers
91.5%
Load
By direction
Each direction is filed separately — they rarely match.
ATL → ONT
89.8% full
78 departures · 13,289 passengers
ONT → ATL
93.2% full
77 departures · 13,562 passengers
Nonstop ATL–ONT traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
The airports
Atlanta
US
Hartsfield Jackson Atlanta International Airport
Coordinates
33.64°N, 84.43°W
Hemisphere
N · W
Frequently asked
How far is Atlanta (ATL) from Ontario (ONT)?
ATL to ONT is 1,895 miles (3,050 km / 1,647 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from ATL to ONT?
A nonstop covers the 1,895-mile great-circle distance in roughly 4h 35m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies ATL–ONT?
In June 2026, the Airbus A321 flew the largest share of departures (100.0%).
What mileage do I earn flying ATL–ONT?
Distance-based programs credit off the 1,895-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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