ONT to BNA flight delays & on-time performance
Nonstop flights from Ontario International Airport to Nashville International Airport · 1,751 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ONT or BNA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Ontario (ONT) to Nashville (BNA) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.6% were cancelled, and 2% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 5am did best (97% on time); around 11am did worst (38%).
- Saturday was the most reliable day to fly (86% on time) and Wednesday the least (70%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (39%).
Which airline is most on time from ONT to BNA?
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 |
|---|---|---|---|---|---|
| Southwest Airlines | 77% | 0.6% | 11 min | 1.8% | 336 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am97%37 flights
- 6am94%55 flights
- 7am73%31 flights
- 9am73%57 flights
- 10am78%109 flights
- 11am38%24 flights
- 12pm59%17 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%0.0% cancelled
- Tuesday77%0.0% cancelled
- Wednesday70%0.0% cancelled
- Thursday70%0.0% cancelled
- Friday84%2.0% cancelled
- Saturday86%1.9% cancelled
- Sunday80%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)39%
- Air traffic control & airport congestion31%
- Late-arriving aircraft28%
- Security2%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)50%
- Extreme weather50%
- Air traffic control & airport congestion0%
- Security0%
ONT to BNA: common questions
- How often are ONT to BNA 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 Ontario to Nashville cancelled?
- 0.6% of scheduled flights were cancelled (2 of 336).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 42 min behind schedule on average, and 1.8% of flights were an hour or more late.
- How long is taxi time at ONT?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BNA to ONT — 69% on time
More flights from Ontario
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ONT → BNA, nonstop flights by US airlines that report to the DOT. How we calculate this.