CLT to ONT flight delays & on-time performance
Nonstop flights from Charlotte Douglas International Airport to Ontario International Airport · 2,078 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at CLT or ONT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Charlotte (CLT) to Ontario (ONT) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.2% were cancelled, and 8% arrived an hour or more late.
- American Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 5pm did best (91% on time); around 8pm did worst (57%).
- Saturday was the most reliable day to fly (85% on time) and Sunday the least (69%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Which airline is most on time from CLT to ONT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 77% | 1.2% | 14 min | 8.0% | 327 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5pm91%32 flights
- 6pm75%103 flights
- 7pm86%118 flights
- 8pm57%71 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%0.0% cancelled
- Tuesday78%2.2% cancelled
- Wednesday85%0.0% cancelled
- Thursday74%0.0% cancelled
- Friday77%2.1% cancelled
- Saturday85%0.0% cancelled
- Sunday69%4.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion13%
- Extreme weather5%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather50%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion25%
- Security0%
CLT to ONT: common questions
- How often are CLT to ONT flights on time?
- 77% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Charlotte to Ontario cancelled?
- 1.2% of scheduled flights were cancelled (4 of 327).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 56 min behind schedule on average, and 8.0% of flights were an hour or more late.
- How long is taxi time at CLT?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ONT to CLT — 87% on time
More flights from Charlotte
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: CLT → ONT, nonstop flights by US airlines that report to the DOT. How we calculate this.