BNA to ONT flight delays & on-time performance
Nonstop flights from Nashville International Airport to Ontario International Airport · 1,751 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BNA or ONT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Nashville (BNA) to Ontario (ONT) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.3% were cancelled, and 5% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 11am did best (87% on time); around 6pm did worst (50%).
- Wednesday was the most reliable day to fly (79% on time) and Tuesday the least (57%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from BNA 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 |
|---|---|---|---|---|---|
| Southwest Airlines | 69% | 0.3% | 14 min | 5.1% | 336 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 11am87%39 flights
- 12pm66%57 flights
- 1pm63%82 flights
- 3pm81%42 flights
- 4pm70%56 flights
- 6pm50%48 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%0.0% cancelled
- Tuesday57%0.0% cancelled
- Wednesday79%0.0% cancelled
- Thursday73%0.0% cancelled
- Friday72%0.0% cancelled
- Saturday69%0.0% cancelled
- Sunday59%2.0% 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 aircraft43%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion17%
- Extreme weather5%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
BNA to ONT: common questions
- How often are BNA to ONT flights on time?
- 69% 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 Nashville to Ontario cancelled?
- 0.3% of scheduled flights were cancelled (1 of 336).
- 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 40 min behind schedule on average, and 5.1% of flights were an hour or more late.
- How long is taxi time at BNA?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ONT to BNA — 77% on time
More flights from Nashville
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BNA → ONT, nonstop flights by US airlines that report to the DOT. How we calculate this.