Skip to content
WanderNerd
Check a flight

Route Reliability

Sacramento → Ontario

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

92
Nerd Approved
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
0.2%
Cancelled
2,110
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 85% of the time across 2,110 flights. No comparison to make.

What the data says

Morning flights do better here.

SMF–ONT flights departing between 3–6 AM arrived on time 97% of the time, versus 54% between 9 PM–12 AM.

Wednesday comes out ahead.

A small edge: 88% on time on Wednesdays against 84% on Thursdays.

It basically never cancels.

Out of 2,110 scheduled flights, only 0.2% were cancelled.

Flights on this route

The breakdown

On-time by weekday
  • Mon86%(344 flights)
  • Tue86%(305 flights)
  • Wed88%(300 flights)
  • Thu84%(342 flights)
  • Fri85%(339 flights)
  • Sat87%(180 flights)
  • Sun84%(292 flights)
On-time by departure window
  • 3–6 AM97%(97 flights)
  • 6–9 AM94%(430 flights)
  • 9 AM–12 PM90%(409 flights)
  • 12–3 PM84%(307 flights)
  • 3–6 PM81%(321 flights)
  • 6–9 PM78%(501 flights)
  • 9 PM–12 AM54%(37 flights)
On-time trend by month
83%
May

Jun 79% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%175
July 202588%179
August 202590%176
September 202589%177
October 202585%180
November 202586%177
December 202580%177
January 202686%155
February 202686%152
March 202688%184
April 202684%184
May 202683%186

Same trip, other airports

Keep nerding

Based on 2,110 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.