Route profile
CLT→ONT
Flight reliability, delays and best times to fly from Charlotte to Ontario, 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 18% of comparable major US routes (4,598 compared)
Calculated from 1,047 flights. How this is calculated · What counts as on time
CLT → ONT arrives on time 70.3% of the time; the return trip, ONT → CLT, arrives on time 86.4% of the time, a 16.1-point gap between the two directions of the same city pair.
CLT → ONT spends 25.6 minutes on the ground on a 2,078-mile trip: 19.1 minutes from pushback to wheels-up at CLT and 6.6 minutes from touchdown to gate at ONT.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where CLT to ONT differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
CLT to ONT is at its best against routes of similar length for flights scheduled at 6 PM: 75.1% arrive on time, 5.6 points ahead of the 69.5% those routes manage at that hour. Against all other routes the gap is 6.5 points.
Monday is the day CLT to ONT slips furthest against routes of similar length, 66.9% on time where they average 78.3%, 11.4 points lower. Against all other routes the gap is 10.4 points.
In July, CLT to ONT runs 23.1 points below routes of similar length, 47.5% on time to 70.6%. Against all other routes the gap is 22.2 points.
American Airlines’ flights on CLT to ONT arrive on time 70.3% of the time, 8 points below the 78.3% it manages on its routes of similar length. Against all other routes the gap is 4.8 points.
CLT to ONT against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 6 PM departures | 75.1% | routes of similar length | 69.5% | +5.6 pts | 547 here, 51,598 there |
| Weekday: Monday | 66.9% | routes of similar length | 78.3% | −11.4 pts | 148 here, 140,804 there |
| Month: July | 47.5% | routes of similar length | 70.6% | −23.1 pts | 120 here, 114,111 there |
| Airline: American Airlines | 70.3% | routes of similar length | 78.3% | −8.0 pts | 1,035 here, 239,610 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.
CLT to ONT in context
This route against CLT and ONT as a whole, against similar routes from CLT, and against its own first year, July 2023 – July 2026.
Leaving CLT, CLT to ONT is on time 70.3% of the time, 4.5 points worse than the airport’s other departures at CLT (74.8%, from 605,432 flights).
Arriving at ONT, CLT to ONT is on time 70.3% of the time, 8.6 points worse than the airport’s other arrivals at ONT (78.9%, from 78,158 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
66 min late
against a median of 2 min early
CLT → ONT has an average that understates its risk: a typical arrival is 2 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 1,047 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at ONT after arriving from CLT.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 47% | Likely to miss |
| 45 min | 29% | High risk |
| 60 min | 19% | High risk |
| 90 min | 10% | Some risk |
| 120 min | 6.5% | Some 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 0.96% of the time and diverts 0.19% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,035 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 66 minutes late (90th-percentile gate arrival delay), over 1,047 operations.
Any other layover length: connection checker.
Why CLT → ONT runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
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 CLT → ONT. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on CLT → ONT, at 48.6%: flights here mostly leave late because the plane came in late.
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 | 1,047 | 70.3% | 0.96% | -2 min | 10.7% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Friday the least, a gap of 10.3 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 77.1% against 71.5% in the 12 months before — improving by 5.6 percentage points.
Data and methodology
Calculated by FlyerIntel from 1,047 CLT → ONT 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