Route profile
ONT→CLT
Flight reliability, delays and best times to fly from Ontario to Charlotte, 2,078 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 83% of comparable major US routes (4,598 compared)
Calculated from 1,048 flights. How this is calculated · What counts as on time
ONT → CLT arrives on time 86.4% of the time; the return trip, CLT → ONT, arrives on time 70.3% of the time, a 16.1-point gap between the two directions of the same city pair.
ONT → CLT spends 23.0 minutes on the ground on a 2,078-mile trip: 14.0 minutes from pushback to wheels-up at ONT and 9.0 minutes from touchdown to gate at CLT.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where ONT to CLT differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
ONT to CLT is at its best against routes of similar length for flights scheduled at 10 PM: 85.7% arrive on time, 5.3 points ahead of the 80.4% those routes manage at that hour. Against all other routes the gap is 14.1 points.
ONT to CLT holds up on Mondays better than routes of similar length do: 89.9% on time to their 78.3%, a 11.6 points lead. Against all other routes the gap is 12.7 points.
American Airlines does better on ONT to CLT than on its routes of similar length: 86.4% on time here, 78.3% there, 8.1 points apart. Against all other routes the gap is 11.3 points.
ONT to CLT against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 10 PM departures | 85.7% | routes of similar length | 80.4% | +5.3 pts | 927 here, 52,147 there |
| Weekday: Monday | 89.9% | routes of similar length | 78.3% | +11.6 pts | 148 here, 140,804 there |
| Airline: American Airlines | 86.4% | routes of similar length | 78.3% | +8.1 pts | 1,037 here, 239,608 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 2,078 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
ONT to CLT in context
This route against ONT and CLT as a whole, against similar routes from ONT, and against its own first year, July 2023 – July 2026.
Leaving ONT, ONT to CLT is on time 86.4% of the time, 2.9 points better than the airport’s other departures at ONT (83.5%, from 78,038 flights).
Arriving at CLT, ONT to CLT is on time 86.4% of the time, 6.8 points better than the airport’s other arrivals at CLT (79.6%, from 605,510 flights).
Airport comparisons take this route’s flights out of the airport total. Length means within 15% of this route’s distance, with at least 3 other routes from the same origin. On-time gaps are stated at 2 points and 2 standard errors, cancellation gaps at 0.5 points and 2 standard errors, and every group needs 750 flights. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
23 min late
against a median of 11 min early
Percentiles over 1,048 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at CLT after arriving from ONT.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 27% | High risk |
| 45 min | 13% | Some risk |
| 60 min | 8.3% | Some risk |
| 90 min | 4.3% | Low risk |
| 120 min | 3.2% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.95% of the time and diverts 0.10% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,037 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 23 minutes late (90th-percentile gate arrival delay), over 1,048 operations.
Any other layover length: connection checker.
Why ONT → CLT runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for ONT → CLT. Only delays of 15 minutes or more are attributed. What the five causes mean
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 1,048 | 86.4% | 0.95% | -11 min | 4.4% |
Weekly and seasonal patterns
By day of week
Monday is historically the most reliable day and Saturday the least, a gap of 8.4 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 86.6% against 83.6% in the 12 months before — improving by 3.0 percentage points.
Data and methodology
Calculated by FlyerIntel from 1,048 ONT → CLT flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed