Airport month record
SFOJUN
San Francisco International in June 2026
- Departures
- 13,415
- Month
- June 2026
- National, same month
- 74.3%
- Carriers
- 8
Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at SFO, see live FAA status.
SFO in June draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 13,415 flights, of which United Airlines flew 5,699 at 74.8% on time.
United Airlines is the most reliable of the eight carriers covered here at 74.8% on time across 5,699 flights.
Key figures
On time
67.1%
Arrivals under 15 minutes late, of 13,275 completed departures
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.70%
Nationally in June: 1.65%
Whole year
75.3%
SFO across all twelve months
These figures cover 13,415 departures from San Francisco International in June 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
June next to SFO's other months
Against SFO's own year, June ran 8 points worse than the twelve-month rate of 75.3%, which makes it number ten of twelve months, best first. Either side of it, May ran 70.1% on time and July 66.1%, so this month sits in line with its neighbours.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| September 2025 | 11,830 | 82.4% | 58 min | 0.25% | B+ |
| October 2025 | 12,774 | 80.1% | 61 min | 0.36% | B+ |
| November 2025 | 12,022 | 78.6% | 66 min | 1.86% | B |
| December 2025 | 11,975 | 76.3% | 81 min | 1.07% | B |
| January 2026 | 11,113 | 82.5% | 85 min | 2.43% | B |
| February 2026 | 10,316 | 81.7% | 77 min | 1.21% | B |
| March 2026 | 12,171 | 84.0% | 72 min | 1.02% | B |
| April 2026 | 12,401 | 74.7% | 63 min | 0.70% | C+ |
| May 2026 | 13,114 | 70.1% | 64 min | 0.79% | C+ |
| June 2026 (this page) | 13,415 | 67.1% | 67 min | 0.70% | C+ |
| July 2026 | 13,841 | 66.1% | 66 min | 1.15% | C |
| August 2026 | 13,560 | 65.5% | 64 min | 0.73% | C+ |
Departure window
The best time of day to leave SFO in June
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 36 points, against 39 points between the best and worst carrier.
- 5am–8am1,511 flights92.8%
- 8am–11am3,121 flights73.7%
- 11am–2pm1,867 flights57.4%
- 2pm–5pm2,314 flights57.0%
- 5pm–8pm1,755 flights65.7%
- 8pm–5am2,847 flights61.4%
Scale runs 50% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 92.8% of the time, against 57.0% for the afternoon window. That is 36 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 3,121 flights scheduled in it.
Across the week, Saturday is the strongest day at 77.8% on time and Thursday the weakest at 60.1%, a spread of 18 points.
Carrier by carrier
Which airlines ran best at SFO in June
The choice of carrier is not cosmetic here. United Airlines arrives on time 74.8% of the time; Southwest Airlines manages 36.1%. Sample sizes sit next to every figure, because a two-point gap across 954 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 5,699 | 74.8% | 61 min | 0.19% | C+ |
| SkyWest Airlines | 2,549 | 62.4% | 65 min | 0.78% | D+ |
| Delta Air Lines | 1,266 | 64.5% | 55 min | 0.55% | D+ |
| American Airlines | 1,156 | 69.3% | 117 min | 2.16% | C |
| Alaska Airlines | 965 | 69.2% | 48 min | 0.62% | C+ |
| Southwest Airlines | 954 | 36.1% | 63 min | 0.84% | F+ |
| JetBlue Airways | 435 | 65.8% | 75 min | 0.92% | C+ |
| Frontier Airlines | 391 | 57.4% | 88 min | 3.32% | D− |
Frontier Airlines cancels 3.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Busiest routes out of SFO in June
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SFO to LAX · Los Angeles | 1,079 | 60.7% | 52 min | 0.09% | D+ |
| SFO to SEA · Seattle | 633 | 60.1% | 54 min | 0.63% | D+ |
| SFO to JFK · New York | 611 | 71.2% | 74 min | 1.15% | C |
| SFO to SAN · San Diego | 602 | 54.1% | 62 min | 1.83% | F |
| SFO to ORD · Chicago | 530 | 70.4% | 103 min | 1.32% | C |
| SFO to LAS · Las Vegas | 511 | 61.1% | 74 min | 0.59% | D+ |
| SFO to BOS · Boston | 502 | 68.9% | 68 min | 0.80% | C+ |
| SFO to DEN · Denver | 494 | 63.7% | 60 min | 0.20% | D+ |
| SFO to DFW · Dallas-Fort Worth | 424 | 60.9% | 103 min | 3.54% | D− |
| SFO to PHX · Phoenix | 384 | 64.5% | 62 min | 0.26% | D+ |
| SFO to SNA · Santa Ana | 373 | 68.9% | 66 min | 1.34% | C |
| SFO to EWR · Newark | 371 | 77.6% | 88 min | 0.27% | B+ |
| SFO to ATL · Atlantathin sample | 304 | 77.5% | 56 min | 0.66% | B+ |
| SFO to IAH · Houstonthin sample | 300 | 81.9% | 46 min | 0.00% | B+ |
| SFO to SLC · Salt Lake Citythin sample | 291 | 61.8% | 59 min | 1.03% | D |
| SFO to PDX · Portlandthin sample | 289 | 68.2% | 57 min | 0.00% | C+ |
| SFO to HNL · Honoluluthin sample | 270 | 84.0% | 46 min | 0.74% | B+ |
| SFO to BUR · Burbankthin sample | 261 | 58.5% | 52 min | 1.15% | D |
| SFO to AUS · Austinthin sample | 242 | 61.4% | 66 min | 0.00% | D+ |
| SFO to IAD · Washingtonthin sample | 234 | 72.6% | 61 min | 0.00% | C+ |
| SFO to PHL · Philadelphiathin sample | 230 | 85.5% | 120 min | 1.30% | A |
| SFO to PSP · Palm Springsthin sample | 194 | 58.2% | 70 min | 0.00% | D+ |
| SFO to MSP · Minneapolisthin sample | 184 | 57.6% | 59 min | 0.00% | D+ |
| SFO to OGG · Kahuluithin sample | 181 | 85.0% | 49 min | 0.00% | A+ |
| SFO to DTW · Detroitthin sample | 177 | 68.0% | 45 min | 0.56% | C+ |
Delay causes
What held SFO up in June
Late-arriving aircraft accounts for 52% of the 291,000 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Late-arriving aircraft
- 25%Carrier
- 22%National Airspace System
- 2%Extreme weather
- 0%Security
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 291,000 reported delay minutes here, that single category outweighs weather by 22 to one. The split is drawn from 290,938 reported delay minutes.
Cancellations are rare at 0.70%, below the national 1.65% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
11.4% of arrivals land a full hour or more behind schedule, against 9.7% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
What to do with this
Flying from SFO in June
For a June trip through SFO: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 92.8% on time, and with 11.4% of arrivals an hour or more late, a connection here deserves more slack than the same trip in March would.
Related
Where to go next
- San Francisco International (SFO), the whole year
- SFO in September82.4%
- SFO in October80.1%
- SFO in November78.6%
- SFO in December76.3%
- SFO in January82.5%
- SFO in February81.7%
- SFO in March84.0%
- SFO in April74.7%
- SFO in May70.1%
- SFO in July66.1%
- SFO in August65.5%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.