Carrier route record
UARDM→SFO
United Airlines · Redmond to San Francisco
- Flights
- 656
- Period
- September 2025 to August 2026
- Share of route
- 50%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on RDM to SFO draws a D+. Roughly 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 656 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so United on RDM to SFO runs 14 points behind the country as a whole. Across a thousand flights that is about 141 extra late arrivals.
Key figures
On time
63.2%
Arrivals under 15 minutes late, of 653 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
0.46%
National rate is 1.89%
Whole route
61.8%
Every carrier on RDM to SFO, 1,311 flights
These figures cover 656 flights between September 2025 and August 2026. Beyond the headline rate, 11.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
United against every carrier on RDM to SFO
United flew 656 of the 1,311 flights on RDM to SFO, most of the route. Its 63.2% on time is about level with the route as a whole at 61.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 63.2% to SkyWest at 60.3%.
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) | 656 | 63.2% | 64 min | 0.46% | D+ |
| SkyWest Airlines | 655 | 60.3% | 77 min | 1.37% | D |
Flight by flight
United flight numbers on RDM to SFO
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 72 points, against half a point between the best and worst carrier.
- 5am–8am271 flights91.1%
- 8am–11am19 flights—
- 11am–2pm87 flights19.5%
- 2pm–5pm276 flights51.6%
- 5pm–8pm3 flights—
- 8pm–5am—
Scale runs 10% 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 19.5% on time against 91.1% 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 276 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 81.7% in September. 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 67.7% on time and Saturday the weakest at 57.0%, a spread of 11 points.
Arrival by arrival
How late United on RDM to SFO runs when it is late
The 240 late arrivals split 92 under half an hour, 70 between 30 and 60 minutes, and 78 an hour or more.
- 15+ min early112 flights17.2%
- Within 15 min301 flights46.1%
- 15–29 min late92 flights14.1%
- 30–59 min late70 flights10.7%
- 1–2 hours late49 flights7.5%
- 2+ hours late29 flights4.4%
Scale runs 0% to 100%.
Share of 653 completed flights by arrival against schedule.
30 of 226 late departures made up the time and arrived on time, 13% of them. In the other direction, 44 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 United on RDM to SFO
The latest arrival of the period was on 18 July 2026, 9 hours 13 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 July 2026 | 9 hours 13 minutes | Carrier |
| 5 November 2025 | 8 hours 45 minutes | Late-arriving aircraft |
| 18 April 2026 | 6 hours 38 minutes | Carrier |
| 22 February 2026 | 5 hours 54 minutes | Carrier |
| 26 February 2026 | 4 hours 50 minutes | National Airspace System |
Delay causes
Why United runs late on this route
National Airspace System accounts for 51% of the 15,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%National Airspace System
- 26%Carrier
- 23%Late-arriving aircraft
- 0%Extreme weather
51% 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 7,827 minutes out of 15,000, against a national NAS share of 21%. The split is drawn from 15,386 reported delay minutes.
Cancellations are rare at 0.46%, below the national 1.89% 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
11.9% 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 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 80.3% on time across 656 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. 656 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. 656 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 63.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 653 completed flights over 12 months sit behind that.
Related
Where to go next
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.