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Route · ONT → SMF · 2020–2025 BTS data

Ontario to Sacramento

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ONT to SMF (Ontario to Sacramento) ranks #1040 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.7%
On-time
+8.7 pts
vs US avg
57 min
Delay when late
10,949
Flights
#1040 of 4927
Corpus placement

Cancelled

0.2%

Best Month

Sep 2025 93%

Worst Month

Jan 2024 81%

Distance

390 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 179 26 0 0 WN
Nov 2025 178 18 1 1 WN
Oct 2025 181 33 0 0 WN
Sep 2025 177 12 0 0 WN
Aug 2025 178 13 1 0 WN
Jul 2025 178 24 0 0 WN
Jun 2025 176 30 1 0 WN
May 2025 184 28 0 0 WN
Apr 2025 182 22 0 0 WN
Mar 2025 179 16 0 1 WN
Feb 2025 141 11 0 0 WN
Jan 2025 156 16 2 0 WN,F9
Dec 2024 167 21 0 0 F9,WN
Nov 2024 174 21 1 0 WN,F9
Oct 2024 193 17 0 0 WN,F9
Sep 2024 184 15 1 0 WN,F9
Aug 2024 188 14 1 0 F9,WN
Jul 2024 165 29 1 0 F9,WN
Jun 2024 142 25 0 0 WN
May 2024 153 20 0 0 WN
Apr 2024 151 20 0 0 WN
Mar 2024 152 23 0 0 WN
Feb 2024 121 12 1 0 WN
Jan 2024 133 25 0 0 WN

ONT–SMF seasonal on-time pattern

Best: February (90.4%) · weakest: June (80.7%)

80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 87.1%

Strongest calendar month

February

90.4% on-time · ~137 flights/mo

Busiest calendar month

October

~164 flights/mo avg

Weakest calendar month

June

80.7% on-time · ~145 flights/mo

Cancellation Rate

0.2%

10 of 4,012 flights

Diversion Rate

0.0%

2 of 4,012 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

ONT - Ontario

Full on-time, delay-cause, and seasonal performance for Ontario, CA.

ONT on-time profile

SMF - Sacramento

Full on-time, delay-cause, and seasonal performance for Sacramento, CA.

SMF on-time profile

Compare the two airports

See ONT and SMF side by side on delays, cancellations, and reliability.

Compare ONT vs SMF

Origin-hub reliability standing

Among ONT's stronger departures

ONT → SMF posts a 87.7% on-time rate, landing in the ≥85% band with 10 of 21 BTS-tracked routes leaving Ontario. The same hub also shows 9 mid-band and 2 challenged departures · fleet-wide on-time rank #484 of 4927 (highest on-time = #1).

What the Data Says About ONT to SMF

Ontario to Sacramento (ONT to SMF) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.7% on-time rate across 10,949 flights, with delays that do happen averaging 56.6 minutes. The corridor runs roughly 390 miles and is served by 3 carriers. Over the most recent 24 months, 10 of 4,012 flights were cancelled (0.2%) and 2 diverted (0.0%).

Monthly performance varies moderately here: Sep 2025 was the strongest month at 93% on-time versus Jan 2024 at 81%, a 12-point difference.

On the multi-year calendar, ONT–SMF peaks in February at 90.4% on-time while October carries the heaviest traffic (~164 flights per month) ; the softest month is June at 80.7%, a 9.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ONT to SMF rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ONT to SMF ranks #1040 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from ONT to SMF? ▼
Flights from Ontario to Sacramento have a 87.7% on-time rate based on 10,949 flights. The average delay is 56.6 minutes. The best recent month was Sep 2025 with 93% on-time.
What is the cancellation rate for ONT to SMF? ▼
Over the last 24 months, 0.2% of flights on this route were cancelled (10 of 4,012 flights) and 0.0% were diverted.
How far is the flight from ONT to SMF? ▼
The flight distance from Ontario (ONT) to Sacramento (SMF) is approximately 390 miles. This route is served by 3 carriers.
When is the best time to fly from ONT to SMF? ▼
The best recent month for on-time performance was Sep 2025 (93% on-time). The worst was Jan 2024 (81% on-time). Consider booking during months with historically better performance.

Airports on this route

ONT Airport

Ontario
SMF Airport

Sacramento
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using ONT–SMF data

ONT–SMF runs 8.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare ONT and SMF airport profiles: delay causes and top routes differ even on the same corridor. ONT airport
  • If your dates flex, February (90.4% on-time) beats June (80.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.7% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.