Carrier route record
UAEUG→SFO
United Airlines · Eugene to San Francisco
- Flights
- 756
- Period
- September 2025 to August 2026
- Share of route
- 75%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on EUG to SFO sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 756 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.3%, so United on EUG to SFO runs 4 points behind the country as a whole. Across a thousand flights that is about 44 extra late arrivals.
Key figures
On time
72.9%
Arrivals under 15 minutes late, of 752 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.53%
National rate is 1.89%
Whole route
65.6%
Every carrier on EUG to SFO, 1,004 flights
These figures cover 756 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
United against every carrier on EUG to SFO
United flew 756 of the 1,004 flights on EUG to SFO, most of the route. Its 72.9% on time is 7 points better than the route as a whole, which runs 65.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 72.9% to SkyWest at 43.2%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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) | 756 | 72.9% | 67 min | 0.53% | C+ |
| SkyWest Airlinesthin sample | 248 | 43.2% | 88 min | 2.02% | F |
Flight by flight
United flight numbers on EUG 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 40 points, against half a point between the best and worst carrier.
- 5am–8am318 flights94.3%
- 8am–11am—
- 11am–2pm—
- 2pm–5pm354 flights54.1%
- 5pm–8pm84 flights71.4%
- 8pm–5am—
Scale runs 45% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 94.3% of the time, against 54.1% for the afternoon window. That is 40 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 354 flights scheduled in it.
Across the year
United on EUG to SFO through the year
July is the worst month at 53.6% on time, 34 points below January, 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. October was the busiest month here, with 92 flights.
Across the week, Tuesday is the strongest day at 81.9% on time and Wednesday the weakest at 67.7%, a spread of 14 points.
Arrival by arrival
How late United on EUG to SFO runs when it is late
The 204 late arrivals split 60 under half an hour, 66 between 30 and 60 minutes, and 78 an hour or more.
- 15+ min early172 flights22.9%
- Within 15 min376 flights50.0%
- 15–29 min late60 flights8.0%
- 30–59 min late66 flights8.8%
- 1–2 hours late49 flights6.5%
- 2+ hours late29 flights3.9%
Scale runs 0% to 100%.
Share of 752 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 182 departures that left 15 minutes late or more, only 14 made it up before arrival. 36 flights left on time and still arrived late.
The worst days
Worst days for United on EUG to SFO
The latest arrival of the period was on 1 May 2026, 9 hours 8 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 |
|---|---|---|
| 1 May 2026 | 9 hours 8 minutes | Carrier |
| 6 June 2026 | 6 hours 41 minutes | Carrier |
| 24 November 2025 | 4 hours 58 minutes | Late-arriving aircraft |
| 21 April 2026 | 4 hours 43 minutes | Late-arriving aircraft |
| 30 May 2026 | 4 hours 10 minutes | Carrier |
Delay causes
Why United runs late on this route
National Airspace System accounts for 56% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%National Airspace System
- 23%Late-arriving aircraft
- 21%Carrier
- 0%Extreme weather
56% 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 7,719 minutes out of 14,000, against a national NAS share of 21%. The split is drawn from 13,727 reported delay minutes.
Cancellations are rare at 0.53%, 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
10.4% 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 451 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 77.5% on time across 755 flights, 5 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 5 points of difference.
One caution: this is a thin sample. 756 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 EUG to SFO
Put together: treat all of this as provisional. 756 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 72.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 752 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.