Route reliability record
SFO→EUG
San Francisco to Eugene
- Flights
- 1,004
- Period
- September 2025 to August 2026
- Distance
- 451 mi
- Carriers
- 2
This route sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 1,004 SFO to EUG flights, with a median arrival 6 minutes early.
Best time to fly SFO to EUG: a 8am–11am departure, ideally on a Saturday. Flights in that window arrived on time 80.3% of the time and Saturday flights 82.1%, against 73.9% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.9%
Arrivals under 15 minutes late, of 1,000 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.40%
National rate is 1.89%
Best carrier
United
77.5% on time across 755 flights
These figures cover 1,004 flights between September 2025 and August 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on SFO to EUG
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 | 755 | 77.5% | 74 min | 0.00% | B+ |
| SkyWest Airlinesthin sample | 249 | 62.9% | 71 min | 1.61% | D |
Flight by flight
Flights on SFO to EUG
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am365 flights80.3%
- 11am–2pm2 flights—
- 2pm–5pm274 flights69.9%
- 5pm–8pm17 flights—
- 8pm–5am346 flights69.8%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 80.3% of the time, against 69.8% for the overnight window. That is 11 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 365 flights scheduled in it.
Explore
Filter SFO to EUG by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On SFO to EUG, the best departure window is 8am–11am at 80.3% on time and the worst is 8pm–5am at 69.8%, a wide gap of 10.5 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am80.3%
- 11am–2pm—
- 2–5pm69.9%
- 5–8pm—
- 8pm–5am69.8%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 42 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 47.2% on time, 42 points below February, the best at 88.9%. 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. August was the busiest month here, with 103 flights.
Across the week, Saturday is the strongest day at 82.1% on time and Monday the weakest at 67.6%, a spread of 15 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 50% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 31%Carrier
- 19%National Airspace System
- 0%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 19,000 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 18,931 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 80.3% on time here.
Cancellations are rare at 0.40%, 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 actually costs
11.0% 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 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 65.6% on time across 1,004 flights, 8 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 8 points of difference.
One caution: this is a thin sample. 1,004 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.
Work out the risk of missing a connection in EUG after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 1,004 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 73.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,000 completed flights over 12 months sit behind that.
Common questions
SFO to EUG questions
How often is SFO to EUG delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 26.1% of the 1,004 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is SFO to EUG compared with the rest of the country?
73.9% of flights arrive on time here against a national 77.3%, a difference of 3 points against it. That is worth a C+ on this site's grading scale.
What time of day has the fewest delays on SFO to EUG?
The 8am–11am departure window is the strongest at 80.3% on time. The 8pm–5am window is the weakest at 69.8%, 11 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on SFO to EUG?
July is the weakest month at 47.2% on time, compared with 88.9% in February. Across the year that is 42 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- EUG to SFO — the return legseparate record
- San Francisco International (SFO) delay statistics
- United Airlines on SFO to EUG77.5%
- SkyWest Airlines on SFO to EUG62.9%
- SFO to LAX, a related route70.9%
- SEA to EUG, a related route84.2%
- SFO to SEA, a related route72.3%
- United Airlines on-time record77.5%
- SkyWest Airlines on-time record62.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. SFO to EUG and EUG to SFO are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.