Route reliability record
SLC→EUG
Salt Lake City to Eugene
- Flights
- 800
- Period
- September 2025 to August 2026
- Distance
- 618 mi
- Carriers
- 1
This route earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 55 minutes. That rests on 800 SLC to EUG flights, with a median arrival 7 minutes early.
Best time to fly SLC to EUG: a 11am–2pm departure, ideally on a Tuesday. Flights in that window arrived on time 92.8% of the time and Tuesday flights 94.7%, against 90.9% for the route overall.
Set against the rest of the country, this route's record is 14 points better than the US average of 77.3%. That gap is worth roughly 136 fewer late arrivals for every thousand flights.
Key figures
On time
90.9%
Arrivals under 15 minutes late, of 800 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Best carrier
SkyWest
90.9% on time across 800 flights
These figures cover 800 flights between September 2025 and August 2026. The median arrival is 7 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.
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Carrier by carrier
Which airline is most reliable on SLC 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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 800 | 90.9% | 54 min | 0.00% | A+ |
Flight by flight
Flights on SLC 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–11am254 flights90.9%
- 11am–2pm111 flights92.8%
- 2pm–5pm70 flights81.4%
- 5pm–8pm1 flights—
- 8pm–5am364 flights92.0%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 92.8% on time, ahead of 2pm–5pm at 81.4%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 364 flights scheduled in it.
Explore
Filter SLC 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 SLC to EUG, the best departure window is 11am–2pm at 92.8% on time and the worst is 2pm–5pm at 81.4%, a wide gap of 11.4 points. All US flights leaving 11am–2pm ran 78.3%.
- 5–8am—
- 8–11am90.9%
- 11am–2pm92.8%
- 2–5pm81.4%
- 5–8pm—
- 8pm–5am92.0%
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 22 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.
August is the worst month at 76.3% on time, 22 points below September, the best at 98.3%. 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 93 flights.
Across the week, Tuesday is the strongest day at 94.7% on time and Thursday the weakest at 86.0%, a spread of 9 points.
Delay causes
Why this route gets delayed
Carrier accounts for 82% of the 3,957 delay minutes carriers reported here, and the remaining four split what is left.
- 82%Carrier
- 11%Extreme weather
- 6%National Airspace System
Extreme weather accounts for 11% 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 1.9 times the usual weather exposure. The split is drawn from 3,957 reported delay minutes.
The largest share of delay minutes, 82%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,261 of the 3,957 delay minutes reported here.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
Badly late arrivals are rare here: only 2.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 618 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 92.0% on time across 800 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 800 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. 800 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 90.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 800 completed flights over 12 months sit behind that.
Common questions
SLC to EUG questions
How often is SLC to EUG delayed?
Roughly one flight in ten arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 9.1% of the 800 flights in this analysis, against 22.7% nationally. Delayed flights are late by about 55 minutes on average.
How reliable is SLC to EUG compared with the rest of the country?
90.9% of flights arrive on time here against a national 77.3%, a difference of 14 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on SLC to EUG?
The 11am–2pm departure window is the strongest at 92.8% on time. The 2pm–5pm window is the weakest at 81.4%, 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 August delays on SLC to EUG?
August is the weakest month at 76.3% on time, compared with 98.3% in September. Across the year that is 22 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 SLC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- SLC to DEN, a related route79.0%
- SEA to EUG, a related route84.2%
- SLC to PHX, a related route83.5%
- SkyWest Airlines on-time record90.9%
- The most punctual routes in the US, and the least
- The best time of day to fly, according to 7.05 million flight records
Direction matters. SLC to EUG and EUG to SLC 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.