BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ONT→BNA

Ontario, CA (ONT) to Nashville, TN (BNA) flight delay odds

78.6% of 336 official scheduled ONT-to-BNA flights arrived on time; 8.6% arrived at least 30 minutes late and 0.6% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
78.6%arrived on time
8.6%30+ min late
0.6%cancelled
336scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late2.1%all scheduled flights
120+ minutes late1.2%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+6.3 mincompleted flights

Which departure time was most reliable for ONT to BNA?

Among qualifying ONT-to-BNA departure window results, Early morning had the highest on-time rate: 87.7% of 130 flights. Late morning was lowest at 74.3% across 175 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning13087.7%2.3%0.8%
Late morning17574.3%11.4%0.6%

Which weekday was most reliable for ONT to BNA?

Among qualifying ONT-to-BNA weekday results, Sunday had the highest on-time rate: 84.0% of 50 flights. Thursday was lowest at 70.8% across 48 flights.

DayFlightsOn time30+ minCancelled
Monday4973.5%16.3%0.0%
Tuesday4575.6%8.9%0.0%
Wednesday4381.4%7.0%0.0%
Thursday4870.8%8.3%0.0%
Friday4981.6%8.2%2.0%
Saturday5282.7%3.8%1.9%
Sunday5084.0%8.0%0.0%

Which airline was most reliable for ONT to BNA?

Only Southwest Airlines met the ONT-to-BNA airline threshold: 78.6% of 336 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines33678.6%8.6%0.6%

Which month was most reliable for ONT to BNA?

Among qualifying ONT-to-BNA month results, August 2025 had the highest on-time rate: 93.5% of 31 flights. May 2026 was lowest at 48.4% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253171.0%12.9%0.0%
August 20253193.5%0.0%0.0%
September 20253090.0%3.3%0.0%
October 20253187.1%9.7%0.0%
November 20252982.8%10.3%0.0%
December 20253183.9%6.5%0.0%
February 20261989.5%0.0%0.0%
March 20262993.1%6.9%0.0%
April 20263066.7%10.0%0.0%
May 20263148.4%16.1%0.0%
June 20263063.3%13.3%3.3%

What drove ONT to BNA delay minutes?

Airline was the largest recorded ONT-to-BNA delay category, accounting for 36.7% of 2,843 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.7%
Late aircraft34.2%
National airspace26.6%
Weather0.0%
Security2.6%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.