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Route Reliability

Ontario → Nashville

ONT–BNA · 1,751 miles · Ontario International Airport to Nashville International Airport

87
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
6 min
Average arrival delay
0.3%
Cancelled
336
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 81% of the time across 336 flights. No comparison to make.

What the data says

Morning-you made the right choice.

ONT–BNA flights departing between 3–6 AM arrived on time 97% of the time, versus 68% between 12–3 PM.

Mondays have been rough.

ONT–BNA flights arrived on time 88% of the time on Sundays and just 71% on Mondays. That gap is worth planning around.

It basically never cancels.

Out of 336 scheduled flights, only 0.3% were cancelled.

Recent months have been rougher.

ONT–BNA flights arrived on time 73% of the time over the last three months in the data, compared with 88% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon71%(49 flights)
  • Tue80%(44 flights)
  • Wed86%(43 flights)
  • Thu81%(47 flights)
  • Fri78%(49 flights)
  • Sat84%(51 flights)
  • Sun88%(51 flights)
On-time by departure window
  • 3–6 AM97%(30 flights)
  • 6–9 AM88%(101 flights)
  • 9 AM–12 PM77%(166 flights)
  • 12–3 PM68%(37 flights)
On-time trend by month
48%
May

Jun 77% → May 48% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202571%31
August 202594%31
September 202590%30
October 202587%31
November 202583%29
December 202584%31
January 202685%13
February 202694%18
March 202693%29
April 202677%30
May 202648%31

Same trip, other airports

Keep nerding

Based on 336 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.