Carrier route record
OOMFR→SFO
SkyWest Airlines · Medford to San Francisco
- Flights
- 622
- Period
- September 2025 to August 2026
- Share of route
- 61%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on MFR to SFO draws a D. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 622 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.3%, so SkyWest on MFR to SFO runs 13 points behind the country as a whole. Across a thousand flights that is about 132 extra late arrivals.
Key figures
On time
64.1%
Arrivals under 15 minutes late, of 613 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.29%
National rate is 1.89%
Whole route
63.7%
Every carrier on MFR to SFO, 1,019 flights
These figures cover 622 flights between September 2025 and August 2026. Beyond the headline rate, 12.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on MFR to SFO
SkyWest flew 622 of the 1,019 flights on MFR to SFO, most of the route. Its 64.1% on time is about level with the route as a whole at 63.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 64.1% to United at 63.0%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page) | 622 | 64.1% | 81 min | 1.29% | D |
| United Airlines | 397 | 63.0% | 54 min | 0.00% | D+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against half a point between the best and worst carrier.
- 5am–8am160 flights80.4%
- 8am–11am15 flights—
- 11am–2pm—
- 2pm–5pm154 flights69.3%
- 5pm–8pm293 flights53.3%
- 8pm–5am—
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 53.3% on time, against 80.4% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 293 flights scheduled in it.
Across the year
SkyWest on MFR to SFO through the year
July is the worst month at 23.3% on time, 65 points below March, the best at 87.8%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 84 flights.
Across the week, Saturday is the strongest day at 72.1% on time and Tuesday the weakest at 58.2%, a spread of 14 points.
Arrival by arrival
How late SkyWest on MFR to SFO runs when it is late
The 220 late arrivals split 69 under half an hour, 75 between 30 and 60 minutes, and 76 an hour or more.
- 15+ min early145 flights23.7%
- Within 15 min248 flights40.5%
- 15–29 min late69 flights11.3%
- 30–59 min late75 flights12.2%
- 1–2 hours late37 flights6.0%
- 2+ hours late39 flights6.4%
Scale runs 0% to 100%.
Share of 613 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 184 departures that left 15 minutes late or more, only 21 made it up before arrival. In the other direction, 57 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for SkyWest on MFR to SFO
The latest arrival of the period was on 8 June 2026, 15 hours 27 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as extreme weather.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 June 2026 | 15 hours 27 minutes | National Airspace System |
| 14 July 2026 | 13 hours 54 minutes | Extreme weather |
| 13 January 2026 | 8 hours 48 minutes | Late-arriving aircraft |
| 14 December 2025 | 8 hours 16 minutes | Extreme weather |
| 16 January 2026 | 7 hours 40 minutes | Extreme weather |
Delay causes
Why SkyWest runs late on this route
National Airspace System accounts for 48% of the 18,000 delay minutes carriers reported here, and the remaining four split what is left.
- 48%National Airspace System
- 22%Late-arriving aircraft
- 18%Extreme weather
- 13%Carrier
Extreme weather accounts for 18% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.9 times the usual weather exposure. The split is drawn from 17,825 reported delay minutes.
48% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 8,472 minutes out of 18,000, against a national NAS share of 21%.
Cancellations sit at 1.29% against a national 1.89%, which is ordinary. Diversions add another 0.16%.
Connections and stage length
What a delay here costs
12.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 329 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 77.3% on time across 620 flights, 13 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 13 points of difference.
One caution: this is a thin sample. 622 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on MFR to SFO
Put together: treat all of this as provisional. 622 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 64.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 613 completed flights over 12 months sit behind that.
Related
Where to go next
- MFR to SFO, every carrier
- SkyWest on SFO to MFR, the return leg
- United Airlines on MFR to SFO63.0%
- SkyWest Airlines network-wide record
- San Francisco International (SFO) delay statistics
- How often a connection fails at the major US hubs
- The best time of day to fly, according to 7.05 million flight records
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.