Carrier route record
UARDM→SFO
United Airlines · Redmond to San Francisco
- Flights
- 620
- Period
- July 2025 to June 2026
- Share of route
- 49%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on RDM to SFO 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 620 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.6%, so United on RDM to SFO runs 11 points behind the country as a whole. Across a thousand flights that is about 107 extra late arrivals.
Key figures
On time
66.9%
Arrivals under 15 minutes late, of 617 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
0.48%
National rate is 1.81%
Whole route
66.7%
Every carrier on RDM to SFO, 1,278 flights
These figures cover 620 flights between July 2025 and June 2026. Beyond the headline rate, 10.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
United against every carrier on RDM to SFO
United flew 620 of the 1,278 flights on RDM to SFO, about 49% of it. Its 66.9% on time is about level with the route as a whole at 66.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 66.9% to SkyWest at 66.5%.
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) | 620 | 66.9% | 65 min | 0.48% | C+ |
| SkyWest Airlines | 658 | 66.5% | 74 min | 1.37% | C |
Flight by flight
United flight numbers on RDM to SFO
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 68 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am222 flights91.9%
- 8am–11am19 flights—
- 11am–2pm46 flights23.9%
- 2pm–5pm317 flights57.3%
- 5pm–8pm16 flights—
- 8pm–5am—
Scale runs 15% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 23.9% on time against 91.9% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 2pm–5pm window is the busiest, with 317 flights scheduled in it.
Across the year
United on RDM to SFO through the year
February is the weak month at 48.8% on time, against 86.0% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. March was the busiest month here, with 62 flights.
Across the week, Thursday is the strongest day at 72.7% on time and Saturday the weakest at 61.6%. 11 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
One category carries most of the weight here. National Airspace System accounts for 52% of the 13,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 52%National Airspace System
- 26%Late-arriving aircraft
- 23%Carrier
- 0%Extreme weather
52% 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 6,839 minutes out of 13,000, against a national NAS share of 21%. The split is drawn from 13,266 reported delay minutes.
Cancellations are rare at 0.48%, below the national 1.81% 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.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 462 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 84.3% on time across 621 flights, 17 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 17 points of difference.
One caution: this is a thin sample. 620 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 RDM to SFO
Put together: treat all of this as provisional. 620 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 66.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 617 completed flights over 12 months sit behind that.
Related
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.