Route on-time record
CLT to ONT: most on-time flights and the best time to fly
Charlotte (Charlotte Douglas International Airport) to Ontario (Ontario International Airport). 327 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was American 1920 at 7:00 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
CLT → ONT
Charlotte to Ontario: 327 nonstop flights a year
On time (12 months)
75%
Cancelled
0.9%
avg delay 18 min
Best time to leave
3 to 6 PM
91% on time vs 73% 6 to 9 PM
Most reliable airline
American
75% chance on time
Lowest nonstop fare seen in the next two months: $518 (American 2340 on 2026-10-17). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · American 1920
7:00 PM → 9:24 PM5h 24m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.4%
- Avg arrival delay
- 11 min
- Arrived on time 84% of the time (143 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 73% on time; 3 to 6 PM: 91%).
- Departs inside CLT's trouble window: 63% of its 48 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 143 flights
Find American 1920 fares Opens this date on Aviasales#2 · American 2458
6:53 PM → 9:07 PM5h 14m nonstop
Local times, typical schedule. Last flown 2026-05-20.
75%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 75% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 73% on time; 3 to 6 PM: 91%).
- Departs inside CLT's trouble window: 63% of its 48 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 44 flights
Find American 2458 fares Opens this date on Aviasales#3 · American 3036
8:40 PM → 10:36 PM4h 56m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 73% on time; 3 to 6 PM: 91%).
- Departs outside CLT's trouble window (2 PM to 8 PM, when 63% of its 48 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 3036 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines75%
327 flights · 75% on time as flown · 0.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 3 to 6 PM91%
32 flights · avg delay 8 min
- 6 to 9 PM73%
293 flights · avg delay 19 min
Best day: Tuesday (78%). Worst: Sunday (67%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft45%
- Airline (crew, maintenance, boarding)30%
- Severe weather14%
- Air traffic control and airport volume10%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
CLT to ONT questions
- What time of day is best to fly CLT to ONT?
- 3 to 6 PM: 91% of flights arrived on time, against 73% for departures 6 to 9 PM.
- Which airline is most on time from CLT to ONT?
- American, with a season-adjusted 75% chance of operating and arriving on time over 327 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on CLT to ONT?
- July (44% on time); the best was October (86%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from CLT
- ONT to CLT (return)
- CLT to MCO 69%
- CLT to ATL 82%
- CLT to LGA 72%
- CLT to ORD 72%
- CLT to BOS 75%
- CLT to DFW 78%
- CLT to EWR 73%
- CLT to MIA 75%
- CLT to DTW 82%
- CLT to BNA 76%
- CLT to PHL 77%
- CLT to TPA 74%
Live status: FAA delays and ground stops