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Route Reliability

Ontario → Sacramento

ONT–SMF · 390 miles · Ontario International Airport to Sacramento International Airport

94
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min early
Average arrival delay
0.2%
Cancelled
2,108
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 87% of the time across 2,108 flights. No comparison to make.

What the data says

Morning flights do better here.

ONT–SMF flights departing between 3–6 AM arrived on time 100% of the time, versus 56% between 9 PM–12 AM.

Sunday scaries are real for this one.

ONT–SMF flights arrived on time 91% of the time on Saturdays. On Sundays: 80%.

It basically never cancels.

Out of 2,108 scheduled flights, only 0.2% were cancelled.

Flights on this route

The breakdown

On-time by weekday
  • Mon87%(344 flights)
  • Tue87%(305 flights)
  • Wed90%(300 flights)
  • Thu86%(340 flights)
  • Fri86%(342 flights)
  • Sat91%(179 flights)
  • Sun80%(292 flights)
On-time by departure window
  • 3–6 AM100%(52 flights)
  • 6–9 AM97%(489 flights)
  • 9 AM–12 PM91%(342 flights)
  • 12–3 PM83%(338 flights)
  • 3–6 PM83%(360 flights)
  • 6–9 PM78%(503 flights)
  • 9 PM–12 AM56%(18 flights)
On-time trend by month
80%
May

Jun 83% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%175
July 202587%178
August 202593%177
September 202594%177
October 202582%181
November 202590%176
December 202586%179
January 202687%155
February 202686%152
March 202689%183
April 202685%183
May 202680%186

Same trip, other airports

Keep nerding

Based on 2,108 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.