Airports › San Francisco (SFO) › May 2025
Airport month · May 2025
San Francisco International in May 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In May 2025, reporting carriers scheduled 12,885 domestic departures from San Francisco International (SFO). 82.1% left less than 15 minutes late and 78.3% reached their destination on time; 0.4% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so SFO departures were 5.4 points above the national departure figure.
A year earlier, in May 2024, the airport had 10,974 departures with 71.2% leaving on time: a change of +10.9 points, with flights up 17%.
Flights arriving at SFO that month were on time 78.5% of the time (12,874 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 36%, late-arriving aircraft 34% and air carrier 29%.
- On time 78.3%
- Arrived 15+ minutes late 21.1%
- Cancelled 0.4%
- Diverted 0.2%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | SFO, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 82.1% | 71.2% | 75.1% | 76.7% |
| Arrived on time | 78.3% | 74.9% | 75.6% | 75.4% |
| Cancelled | 0.4% | 0.8% | 1.0% | 1.0% |
| Average departure delay (late minutes only) | 12.9 min | 19.6 min | 17.8 min | 17.5 min |
| Scheduled departures a day | 430 | 366 | 404 | 20,188 |
| Scheduled departures | 12,885 | 10,974 | 147,566 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 5,000 | 39% | 80.6% | 3.2 min | 0.5% |
| OO SkyWest Airlines | 3,116 | 24% | 80.9% | 3.9 min | 0.2% |
| DL Delta Air Lines | 1,140 | 9% | 79.6% | 4.2 min | 0.1% |
| AS Alaska Airlines | 1,080 | 8% | 67.5% | 13.0 min | 0.4% |
| AA American Airlines | 1,053 | 8% | 78.6% | 8.9 min | 0.9% |
| WN Southwest Airlines | 651 | 5% | 69.6% | 11.0 min | 0.3% |
| B6 JetBlue Airways | 390 | 3% | 75.6% | 6.5 min | 0.0% |
| F9 Frontier Airlines | 362 | 3% | 68.2% | 19.3 min | 1.1% |
| HA Hawaiian Airlines | 93 | 1% | 83.9% | -1.7 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SFO–LAX | San Francisco to Los Angeles | 965 | 81.8% | 1.2 min | 0.0% |
| SFO–SEA | San Francisco to Seattle | 636 | 71.5% | 6.5 min | 0.3% |
| SFO–JFK | San Francisco to New York | 623 | 71.1% | 13.1 min | 0.0% |
| SFO–SAN | San Francisco to San Diego | 597 | 77.9% | 5.7 min | 0.5% |
| SFO–LAS | San Francisco to Las Vegas | 519 | 80.2% | 5.0 min | 0.0% |
| SFO–ORD | San Francisco to Chicago | 492 | 79.3% | 3.0 min | 1.0% |
| SFO–DEN | San Francisco to Denver | 490 | 68.2% | 16.0 min | 0.2% |
| SFO–PHX | San Francisco to Phoenix | 457 | 81.2% | 5.3 min | 0.2% |
| SFO–SNA | San Francisco to Santa Ana | 445 | 82.7% | 0.3 min | 0.7% |
| SFO–BOS | San Francisco to Boston | 433 | 70.9% | 8.1 min | 0.0% |
| SFO–EWR | San Francisco to Newark | 417 | 55.2% | 46.3 min | 3.6% |
| SFO–DFW | San Francisco to Dallas/Fort Worth | 367 | 73.3% | 12.6 min | 2.2% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SFO on time in May 2025?
82.1% of 12,885 scheduled domestic departures left less than 15 minutes late, and 78.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 71.2% of 10,974 departures left on time and 0.8% were cancelled, against 82.1% and 0.4% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SFO · methodology · corrections.