Carrier route record
UASFO→MFR
United Airlines · San Francisco to Medford
- Flights
- 397
- Period
- September 2025 to August 2026
- Share of route
- 39%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on SFO to MFR lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 397 flights, with a median arrival 4 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate United on SFO to MFR from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.1%
Arrivals under 15 minutes late, of 397 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
78.0%
Every carrier on SFO to MFR, 1,017 flights
These figures cover 397 flights between September 2025 and August 2026. The median arrival is 4 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
United against every carrier on SFO to MFR
United flew 397 of the 1,017 flights on SFO to MFR, about 39% of it. Its 79.1% on time is about level with the route as a whole at 78.0%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 79.1% to SkyWest at 77.3%.
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 |
|---|---|---|---|---|---|
| United Airlines (this page) | 397 | 79.1% | 58 min | 0.00% | B+ |
| SkyWest Airlines | 620 | 77.3% | 79 min | 1.77% | B |
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 United 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–8am—
- 8am–11am211 flights82.5%
- 11am–2pm—
- 2pm–5pm10 flights—
- 5pm–8pm35 flights97.1%
- 8pm–5am141 flights70.2%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 97.1% on time. The full set of windows spans 27 points.
Across the year
United on SFO to MFR through the year
- Jul–Sep 202560 flights96.7%
- Oct–Dec 202586 flights82.6%
- Jan–Mar 20263 flights—
- Apr–Jun 2026133 flights69.2%
- Jul–Sep 2026115 flights78.3%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 79.1% on time across 397 flights.
United on SFO to MFR did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Apr–Jun 2026 at 69.2%, a swing of 28 points on roughly 99 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Sunday is the strongest day at 87.3% on time and Thursday the weakest at 72.2%, a spread of 15 points.
Arrival by arrival
How late United on SFO to MFR runs when it is late
The 83 late arrivals split 32 under half an hour, 26 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early85 flights21.4%
- Within 15 min229 flights57.7%
- 15–29 min late32 flights8.1%
- 30–59 min late26 flights6.5%
- 1–2 hours late17 flights4.3%
- 2+ hours late8 flights2.0%
Scale runs 0% to 100%.
Share of 397 completed flights by arrival against schedule.
20 of 90 late departures made up the time and arrived on time, 22% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for United on SFO to MFR
The latest arrival of the period was on 26 May 2026, 7 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 May 2026 | 7 hours 43 minutes | Carrier |
| 3 June 2026 | 3 hours 13 minutes | Late-arriving aircraft |
| 17 July 2026 | 2 hours 56 minutes | Late-arriving aircraft |
| 22 August 2026 | 2 hours 53 minutes | Late-arriving aircraft |
| 7 August 2026 | 2 hours 47 minutes | Carrier |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 57% of the 4,825 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Late-arriving aircraft
- 32%Carrier
- 11%National Airspace System
57% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,825 reported delay minutes here, that single category outweighs weather by 57 to one. The split is drawn from 4,825 reported delay minutes.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
6.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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 5pm–8pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 63.0% on time across 397 flights, 16 points below 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 16 points of difference.
One caution: this is a thin sample. 397 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 United on SFO to MFR
Put together: treat all of this as provisional. 397 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 79.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 397 completed flights over 12 months sit behind that.
Related
Where to go next
- SFO to MFR, every carrier
- United on MFR to SFO, the return leg
- SkyWest Airlines on SFO to MFR77.3%
- United Airlines network-wide record
- San Francisco International (SFO) delay statistics
- Why the first flight of the morning is statistically safest
- 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.