Medford (MFR) to San Francisco (SFO): On-Time Performance
Data through May 2026
The calendar drives reliability on MFR–SFO. September 2024 flights landed on schedule 89% of the time, but May 2026 dropped to 53% — a gap of 36 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 75%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 2.8
- last 12 months
- Duration
- 1h 30m
- scheduled
- Distance
- 329 mi
Best airline from MFR to SFO
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 79% | 14 min | 0.7% | 842 |
| SkyWest Airlines | 77% | 19 min | 1.5% | 1,115 |
Monthly on-time trend
Best time to fly from MFR to SFO
Aim for departures around 6 a.m. (90% on-time); avoid 2 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 18 min |
| Tuesday | 80% | 17 min |
| Wednesday | 78% | 17 min |
| Thursday | 74% | 19 min |
| Friday | 79% | 17 min |
| Saturdaybest | 81% | 12 min |
| Sunday | 77% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft24%
- Airline operations28%
- National airspace system38%
- Weather9%
Frequently asked questions
- How often are flights from MFR to SFO delayed?
- 22% of MFR–SFO flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from MFR to SFO?
- United Airlines has the best on-time record on this route at 79%, based on 842 flights. 2 airlines flew MFR–SFO frequently enough to compare in this period.
- What is the best time of day to fly from MFR to SFO?
- Departures around 6 a.m. have the best record (90% on-time), while departures around 2 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MFR to SFO?
- The scheduled MFR–SFO flight time averages 1h 30m over 329 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are MFR to SFO flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from MFR to SFO?
- May 2026 was the roughest month in this dataset, with only 53% of arrivals on time. The best was September 2024 at 89%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,957 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.