76% of flights from San Francisco to Santa Ana arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 94% of the time; the 6 p.m. ones 63%. Most reliable airline: United Airlines (81%). 8% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SFO → SNA: when a flight was late, it was under 45 minutes late 54% of the time. About 1 in 15 flights landed an hour or more late, and 1 in 124 three hours or more; 1.4% were cancelled outright.
- On time or early76%
- 15–30 min late8.1%
- 30–60 min late7.6%
- 1–2 hours late4.5%
- 2–3 hours late1.3%
- 3+ hours late0.8%
- Diverted0.2%
- Cancelled1.4%
Share of all 4,702 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Alaska Airlines | 2,384 | 73% | 2.2% | −5 min | 7.3% | +56 min | SkyWest 98%, Alaska Airlines 2%, Horizon Air 0% |
| United Airlines | 2,164 | 81% | 0.5% | −6 min | 5.3% | +63 min | SkyWest 53%, United Airlines 47% |
| Frontier Airlines | 154 | 62% | 2.6% | +4 min | 13.0% | +87 min | Frontier Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at SFO). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Alaska Airlines | United Airlines |
|---|---|---|
| 6 a.m. | 94% | — |
| 7 a.m. | 92% | 90% |
| 9 a.m. | 75% | 82% |
| 10 a.m. | 55% | 81% |
| 11 a.m. | 74% | — |
| noon | 57% | 77% |
| 1 p.m. | — | 76% |
| 2 p.m. | 63% | — |
| 3 p.m. | 79% | — |
| 4 p.m. | 67% | 69% |
| 5 p.m. | 83% | — |
| 6 p.m. | 58% | — |
| 7 p.m. | 84% | 87% |
| 8 p.m. | 72% | — |
Last flight of the day
On SFO → SNA, each airline's last flight of the day was cancelled 2.7% of the time, against 1.1% for its earlier flights (2.4× as often). It arrived 3+ hours late 0.1% of the time (earlier flights: 1.0%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Alaska Airlines | 8:51 p.m. | 5.5% | 0.0% | 1.6% | first flight 6:35 a.m. |
| United Airlines | 7:10 p.m. | 0.0% | 0.3% | 0.6% | first flight 7:15 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in SNA tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: September (85%). Worst: July (73%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 722 | 73% | 1.4% |
| Tuesday | 639 | 81% | 1.1% |
| Wednesday | 647 | 79% | 0.8% |
| Thursday | 684 | 72% | 2.1% |
| Friday | 698 | 72% | 1.7% |
| Saturday | 634 | 84% | 0.9% |
| Sunday | 678 | 73% | 2.1% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: air traffic/airport 43 · airline 13 · weather 12
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| AS 3440 | 6:50 a.m. | 217 | 89% | 3.2% | −10 min | SkyWest |
| AS 3450 | 9:28 a.m. | 280 | 75% | 1.1% | −4 min | SkyWest |
| UA 643 | 10:40 a.m. | 297 | 79% | 0.0% | −4 min | United Airlines |
| AS 3216 | 11:33 a.m. | 150 | 69% | 2.0% | −3 min | SkyWest |
| UA 5440 | 1:30 p.m. | 360 | 77% | 0.6% | −8 min | SkyWest |
| AS 3494 | 3:48 p.m. | 286 | 80% | 0.7% | −6 min | SkyWest |
| UA 5650 | 4:50 p.m. | 237 | 68% | 1.7% | −2 min | SkyWest |
| AS 3492 | 6:08 p.m. | 238 | 66% | 3.8% | +4 min | SkyWest |
| UA 589 | 7:10 p.m. | 323 | 88% | 0.0% | −10 min | United Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 5, 2026 | 13 | 15% | 1 |
| Dec 26, 2025 | 12 | 17% | 2 |
| Jan 3, 2026 | 11 | 18% | 3 |
| Apr 23, 2026 | 13 | 23% | 1 |
| Nov 8, 2025 | 14 | 29% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of San Francisco or Santa Ana. SJC → SNA has been 9 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| SFO → SNA (this route) | 4,702 | 76% | 1.5% |
| SJC → SNA San Jose to Orange County John Wayne | 2,741 | 85% | 0.8% |
| OAK → LGB Oakland to Long Beach | 1,568 | 85% | 0.3% |
| SJC → LGB San Jose to Long Beach | 1,251 | 84% | 0.2% |
| SJC → LAX San Jose to Los Angeles LAX | 4,669 | 84% | 0.9% |
| OAK → SNA Oakland to Orange County John Wayne | 2,356 | 84% | 0.9% |
| SJC → BUR San Jose to Hollywood Burbank | 2,137 | 83% | 1.3% |
Questions
How often are flights from SFO to SNA on time?
76% of 4,702 scheduled flights from San Francisco, CA to Santa Ana, CA arrived within 15 minutes of schedule between September 2025 and August 2026. 1.5% were cancelled.
What is the best time of day to fly SFO to SNA?
Flights scheduled to leave at 6 a.m. were the most reliable (94% on time). The 6 p.m. departures were the least (63%).
Which airline is most on time from SFO to SNA?
United Airlines: 81% of its 2,164 flights on the route arrived on time. Alaska Airlines: 73%. Frontier Airlines: 62%.
What month has the most delays from SFO to SNA?
July (73% on time). The best month is September (85%), over 2023–2026.
Is the last flight of the day from SFO to SNA more likely to be cancelled?
Yes. Each airline's last SFO–SNA flight of the day was cancelled 2.7% of the time over the past year, against 1.1% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- SNA → SFO (return)
- San Francisco (SFO) delays by hour
- Flights into Orange County John Wayne (SNA)
- Alaska Airlines on-time record
- United Airlines on-time record
- Frontier Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.