Route reliability record
EUG→SLC
Eugene to Salt Lake City
- 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 800 EUG to SLC flights, with a median arrival 11 minutes early.
Best time to fly EUG to SLC: a 5am–8am departure, ideally on a Friday. Flights in that window arrived on time 94.5% of the time and Friday flights 96.5%, against 92.0% for the route overall.
Set against the rest of the country, this route's record is 15 points better than the US average of 77.3%. That gap is worth roughly 147 fewer late arrivals for every thousand flights.
Key figures
On time
92.0%
Arrivals under 15 minutes late, of 800 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Best carrier
SkyWest
92.0% on time across 800 flights
These figures cover 800 flights between September 2025 and August 2026. The median arrival is 11 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.
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
Which airline is most reliable on EUG to SLC
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 | 92.0% | 62 min | 0.00% | A+ |
Flight by flight
Flights on EUG to SLC
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.
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
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 10 points, against half a point between the best and worst carrier.
- 5am–8am365 flights94.5%
- 8am–11am—
- 11am–2pm365 flights91.0%
- 2pm–5pm70 flights84.3%
- 5pm–8pm—
- 8pm–5am—
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 94.5% of the time, against 84.3% for the afternoon window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Explore
Filter EUG to SLC 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 EUG to SLC, the best departure window is 5am–8am at 94.5% on time and the worst is 2pm–5pm at 84.3%, a wide gap of 10.2 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am94.5%
- 8–11am—
- 11am–2pm91.0%
- 2–5pm84.3%
- 5–8pm—
- 8pm–5am—
best all US flightsScale 60% to 100%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 13 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.
January is the weak month at 85.5% on time, against 98.3% 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. August was the busiest month here, with 93 flights.
Across the week, Friday is the strongest day at 96.5% on time and Thursday the weakest at 87.7%, a spread of 9 points.
Delay causes
Why this route gets delayed
Carrier accounts for 75% of the 3,964 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Carrier
- 20%Extreme weather
- 6%National Airspace System
Extreme weather accounts for 20% 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 3.3 times the usual weather exposure. The split is drawn from 3,964 reported delay minutes.
The largest share of delay minutes, 75%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,954 of the 3,964 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 2.5% 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 90.9% 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 SLC 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 92.0% 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
EUG to SLC questions
How often is EUG to SLC delayed?
About one flight in twelve arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 8.0% of the 800 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is EUG to SLC compared with the rest of the country?
92.0% of flights arrive on time here against a national 77.3%, a difference of 15 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on EUG to SLC?
The 5am–8am departure window is the strongest at 94.5% on time. The 2pm–5pm window is the weakest at 84.3%, 10 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 January delays on EUG to SLC?
January is the weakest month at 85.5% on time, compared with 98.3% in September. Across the year that is 13 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
- SLC to EUG — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- EUG to SEA, a related route87.5%
- DEN to SLC, a related route78.2%
- EUG to DEN, a related route79.9%
- SkyWest Airlines on-time record92.0%
- 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. EUG to SLC and SLC to EUG are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed EUG to SLC’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.