ONT → ATLOntario to Atlanta

live

Direct flights from Ontario (ONT) to Atlanta (ATL): 7 nonstop departures observed each week across 1 airline. 100% of the last 17 operated flights arrived within 15 minutes of schedule. The median arrival is 16 minutes early. No cancellations were recorded across the 17 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 26 October 2026 at 14:03 UTC.

Today, ONT → ATL

Mon 26 Oct · local times
  1. 07:07 DL409Delta Air Lines Sched 07:07Departure not confirmed by the board ATL est. 13:53sched 14:14

Checked ONT board 06:18 · ATL board 10:03

ONT Ontario smooth · +7
ATL Atlanta smooth · +0
3,050 km · ~4h 25m est.
dep bank 07:07–23:157x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time

of the last 17 operated ONT → ATL flights arrived within 15 minutes

Median arrival delay is −16 min. 0 of 17 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−16 minacross the last 17 operated legs
Flight time~4h 25mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 17

The week

scheduled departures · origin local time
06121824
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 days
Delta Air LinesDL100% on time

Flights DL409 07:07 daily · DL665 12:16 daily · DL879 23:15 Mo Th Fr Su

History

operated legs · board outcomes
10-25DL409dep +7 → arr−19
10-25DL665dep +10 → arr−16
10-25DL879dep +4 → arr−24
10-24DL409dep +11 → arr−11
10-24DL665dep +5 → arr−24
10-23DL409dep +7 → arr−16
10-23DL665dep +2 → arr−27
10-23DL879dep +8 → arr−11
10-22DL409dep +27 → arr+11
10-22DL665dep +14 → arr+3
10-22DL879dep +9 → arr−9
10-21DL409dep +11 → arr−11
10-21DL665dep +13 → arr−8
10-20DL665dep +7 → arr−24
10-19DL409dep +1 → arr−27
10-19DL665dep +9 → arr−24
10-19DL879dep +9 → arr−22

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
ONTOntario +7 min smooth 🌤 few clouds · N 0 kt Full ONT delay board →
ATLAtlanta +0 min smooth 🌤 scattered clouds · E 6 kt Full ATL delay board →

Weather lens

Current conditions put the pressure at ONT: 36% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

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
https://proflightsearch.com/search-flights/ONT-ATL
How we measure this →

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 94/100. 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 07:07 and evening departures around 23:15 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 18 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.