Delta Air LinesDL86% on time
Flights DL409 07:05 Tu We Th Fr Sa Su · DL761 07:05 daily · DL665 varies daily · DL2892 22:00 Mo Th Fr
live
Direct flights from Ontario (ONT) to Atlanta (ATL): 7 nonstop departures observed each week across 1 airline. 86% of the last 14 operated flights arrived within 15 minutes of schedule. The median arrival is 8 minutes early. No cancellations were recorded across the 14 tracked flights. The nonstop covers 3,050 km, an estimated 4 hours 25 minutes in the air. Measured by Pro Flight Search from live flight boards at Ontario and Atlanta. Updated 14 September 2026 at 03:02 UTC.
ONT
Ontario
busy · +23
ATL
Atlanta
smooth · +0
3,050 km · ~4h 25m est.
Runs reliable · 1 airline · 7x weekly · nonstop
86% on time
of the last 14 operated ONT → ATL flights arrived within 15 minutes
Median arrival delay is −8 min. 0 of 14 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−8 minacross the last 14 operated legs
Flight time~4h 25mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 14
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air Lines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at ONT: 37% odds of a 15+ minute delay and around +8 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Ontario to Atlanta route actually runs
Pro Flight Search records official board updates for nonstop ONT to ATL flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Ontario (ONT) to Atlanta (ATL) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ONT-ATL
ONT to ATL questions
Is ONT–ATL running on time right now?
Smooth skies ahead. The departure side at ONT is the weaker end, route health score 85/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on ONT–ATL?
Operators schedule morning departures around 07:05 and evening departures around 22:00 from ONT. Earlier flights typically land before destination-airport delays accumulate later in the day; check the ATL delay card to confirm conditions when you'd arrive.
How long is the flight from ONT to ATL?
Great-circle distance is 3,050 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 245–291 min gate-to-gate on this route.
How often does ONT–ATL fly?
Delta Air Lines runs the route with about 23 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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