Airport · SCK · Stockton, California
Stockton, CA
Stockton, CA posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as a smaller regional airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 7,206 flights (2020–2025); its biggest delay driver is late aircraft.
Data updated 2026-06-13
- 72.6%
- On-time
- Top 98%
- on-time, US airports
- 79 min
- Delay when late
- 2.32%
- Cancelled
Key Performance Metrics
Total Flights
7,206
Best Month
Feb 89.6%
Worst Month
Jun 79.7%
Delayed
1,975
Cancelled
167
SCK on-time rate vs. the national average
Behind the U.S. average across all 382 tracked airports.
Where SCK sits among all 382 tracked airports
SCK's 72.6% on-time rate falls in the 70-75% band, the 9-airport band it shares.
National on-time-rate distribution
- 60-65% 1
1 airport between 60% and 65% on-time
1 airports
- 65-70% 4
4 airports between 65% and 70% on-time
4 airports
- 70-75% 9
9 airports between 70% and 75% on-time
9 airports
- 75-80% 48
48 airports between 75% and 80% on-time
48 airports
- 80-85%
192 airports between 80% and 85% on-time
192 airports
- 85-90%
116 airports between 85% and 90% on-time
116 airports
- 90-95% 12
12 airports between 90% and 95% on-time
12 airports
What this shows SCK is marked in the 70-75% band.
Delay Cause Breakdown
Top delay cause: Late Aircraft. Total delay minutes: 95,739.
SCK - seasonal on-time pattern
Best: February (89.6%) · worst: June (79.7%)
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: February (89.6% on-time). Most delays: June (79.7% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| December | 102 | 32 | 2 | 81.3% |
| November | 94 | 29 | 1 | 82.2% |
| October | 98 | 28 | 1 | 83% |
| September | 87 | 28 | 0 | 81.9% |
| August | 88 | 26 | 1 | 82.7% |
| July | 106 | 37 | 1 | 80.6% |
| June | 100 | 34 | 1 | 79.7% |
| May | 100 | 23 | 8 | 86.2% |
| April | 85 | 24 | 4 | 84.7% |
| March | 124 | 24 | 8 | 88.7% |
| February | 105 | 21 | 0 | 89.6% |
| January | 112 | 23 | 1 | 88.7% |
Year-Over-Year Performance
Annual flight volume and on-time trends at SCK.
SCK - on-time rate by year
2020–2025, year-over-year trend.
| Year | Flights | Delayed | Cancelled | On-Time % |
|---|---|---|---|---|
| 2025 | 1,128 | 181 | 7 | 84% |
| 2024 | 1,030 | 177 | 2 | 82.8% |
| 2023 | 1,072 | 226 | 3 | 78.9% |
| 2022 | 1,226 | 259 | 15 | 78.9% |
| 2021 | 1,330 | 188 | 22 | 85.9% |
| 2020 | 1,420 | 100 | 118 | 93% |
Cancellation & Diversion Analysis
Flight disruption statistics for Stockton, CA.
Cancellation Rate
2.32%
167 of 7,206 flights
Diversion Rate
0.04%
3 of 7,206 flights
Delay Rate
27.4%
1,975 of 7,206 flights
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Dec 2025 | 124 | 17 | 8 | 0 | 0 |
| Nov 2025 | 96 | 19 | 12 | 1 | 0 |
| Oct 2025 | 108 | 22 | 12 | 0 | 0 |
| Sep 2025 | 84 | 20 | 13 | 0 | 0 |
| Aug 2025 | 100 | 13 | 7 | 0 | 1 |
| Jul 2025 | 120 | 18 | 12 | 3 | 1 |
| Jun 2025 | 118 | 25 | 16 | 1 | 0 |
| May 2025 | 94 | 9 | 7 | 0 | 0 |
| Apr 2025 | 64 | 10 | 6 | 0 | 0 |
| Mar 2025 | 72 | 8 | 3 | 0 | 0 |
| Feb 2025 | 64 | 8 | 5 | 1 | 0 |
| Jan 2025 | 84 | 12 | 5 | 1 | 0 |
| Dec 2024 | 106 | 29 | 14 | 0 | 0 |
| Nov 2024 | 82 | 17 | 9 | 1 | 0 |
| Oct 2024 | 90 | 16 | 8 | 0 | 0 |
| Sep 2024 | 78 | 16 | 15 | 0 | 0 |
| Aug 2024 | 80 | 14 | 9 | 0 | 0 |
| Jul 2024 | 98 | 18 | 12 | 1 | 0 |
| Jun 2024 | 88 | 19 | 10 | 0 | 0 |
| May 2024 | 82 | 7 | 6 | 0 | 0 |
| Apr 2024 | 72 | 8 | 7 | 0 | 0 |
| Mar 2024 | 98 | 14 | 8 | 0 | 0 |
| Feb 2024 | 78 | 6 | 5 | 0 | 0 |
| Jan 2024 | 78 | 13 | 9 | 0 | 0 |
Top Routes from SCK
Busiest routes to and from Stockton, CA.
| Route | Flights | On-Time | Distance |
|---|---|---|---|
| SCK (Stockton) → LAS (Las Vegas) | 2,383 | 63.2% | 359 mi |
| LAS (Las Vegas) → SCK (Stockton) | 2,380 | 77.1% | 359 mi |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Stockton, CA's 72.6%.
Other Airports in California
Compare performance with other California airports.
Los Angeles, CA
Los Angeles · 2,137,032 flights
San Francisco, CA
San Francisco · 1,466,784 flights
San Diego, CA
San Diego · 973,807 flights
Sacramento, CA
Sacramento · 592,833 flights
San Jose, CA
San Jose · 546,547 flights
Santa Ana, CA
Santa Ana · 482,186 flights
Oakland, CA
Oakland · 472,036 flights
Burbank, CA
Burbank · 319,148 flights
Keep exploring
More flight data around Stockton, CA.
California flight data
Statewide on-time and delay aggregates, plus every reporting airport in California.
View CA data →Airport rankings
See where SCK sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put SCK head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About SCK
Stockton, CA in Stockton, California handled 7,206 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 72.6% on-time departure rate. Of those flights, 1,975 experienced delays, 167 were cancelled, and 3 were diverted. The cancellation rate works out to 2.32%, the diversion rate to 0.04%, and the average delay when departures run late is 78.7 minutes. These figures are the baseline for comparing SCK against other airports in the same state and nationally.
Breaking down what drives delays at SCK, Late Aircraft leads the pack. Late Aircraft accounts for 46.2% of total delay minutes, followed by Carrier at 26.4% and NAS (National Aviation System) at 15.9%. Weather contributes 10.1% of delay minutes at this airport, while security holds the smallest share at 1.4%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, February runs the cleanest at SCK with a 89.6% on-time rate, while June is the roughest at 79.7% - a 10-point swing between best and worst month. Volume peaks in March, when average flights hit 124. The busiest route connecting SCK is to LAS (Las Vegas), with 2,383 flights at a 63.2% on-time rate. Combine these numbers - 72.6% on-time, 78.7-minute average delay, 2.32% cancellation rate, and you have a concrete picture of departure reliability at Stockton, CA.
Frequently Asked Questions
What is the on-time performance rate at Stockton, CA (SCK)? ▼
What is the most common cause of delays at SCK? ▼
What is the average delay time at SCK? ▼
What is the best month to fly from SCK? ▼
What is the worst month for delays at SCK? ▼
How many routes operate from SCK? ▼
What is the cancellation rate at SCK? ▼
Flight Guides
Data-driven guides to help you understand airport and flight performance.
Explore PlainFlights
Read our methodology - how this data is sourced, computed, and verified.
Using SCK's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- Check the busiest route from SCK before you book a connection. See top routes
- Travel in February rather than June if your dates are flexible. Seasonal patterns
- Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.