Carrier route record

OOSFO→MFR

SkyWest Airlines · San Francisco to Medford

Flights: 623
Period: July 2025 to June 2026
Share of route: 61%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SFO to MFR lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 623 flights, with a median arrival 6 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate SkyWest on SFO to MFR from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

79.5%

Arrivals under 15 minutes late, of 604 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

1.77%

National rate is 1.81%

Whole route

79.2%

Every carrier on SFO to MFR, 1,029 flights

These figures cover 623 flights between July 2025 and June 2026. The median arrival is 6 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.

Carrier by carrier

SkyWest against every carrier on SFO to MFR

SkyWest flew 623 of the 1,029 flights on SFO to MFR, most of the route. Its 79.5% on time is about level with the route as a whole at 79.2%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 79.5% to United at 78.8%.

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.

On-time performance by carrier on SFO to MFR
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	623	79.5%	80 min	1.77%	B
United Airlines	406	78.8%	51 min	0.00%	B+

Departure window

When SkyWest runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 623 flights.

5am–8am—
8am–11am152 flights76.5%
11am–2pm—
2pm–5pm326 flights79.6%
5pm–8pm4 flights—
8pm–5am141 flights81.8%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is the strongest at 81.8% on time. The full set of windows spans 5 points.

Across the year

SkyWest on SFO to MFR through the year

Darker means more delays. Figures are on-time percentages.August best, July worst

July is the worst month at 66.7% on time, 27 points below August, the best at 93.5%. 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. December was the busiest month here, with 84 flights.

Across the week, Saturday is the strongest day at 87.1% on time and Sunday the weakest at 75.8%. 11 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 9,930 reported delay minutes.

Late-arriving aircraft
31%
Carrier
29%
National Airspace System
27%
Extreme weather
13%

Extreme weather accounts for 13% 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 2.2 times the usual weather exposure. The split is drawn from 9,930 reported delay minutes.

Cancellations sit at 1.77% against a national 1.81%, which is ordinary. Diversions add another 1.28%.

Connections and stage length

What a delay here costs

7.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over 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 8pm–5am window matters as much as it does.

The return leg is a different operation and performs like one: it runs 68.0% on time across 625 flights, 12 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 12 points of difference.

One caution: this is a thin sample. 623 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 SFO to MFR

Put together: treat all of this as provisional. 623 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 79.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 604 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures