Carrier route record

OOSEA→EUG

SkyWest Airlines · Seattle to Eugene

Flights: 1,562
Period: July 2025 to June 2026
Share of route: 80%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SEA to EUG 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 1,562 flights, with a median arrival 8 minutes early.

Set against the rest of the country, SkyWest's SEA to EUG record is 10 points better than the US average of 77.6%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.

On time

87.1%

Arrivals under 15 minutes late, of 1,540 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

1.34%

National rate is 1.81%

Whole route

84.4%

Every carrier on SEA to EUG, 1,951 flights

These figures cover 1,562 flights between July 2025 and June 2026. The median arrival is 8 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.

Carrier by carrier

SkyWest against every carrier on SEA to EUG

SkyWest flew 1,562 of the 1,951 flights on SEA to EUG, most of the route. Its 87.1% on time is 3 points better than the route as a whole, which runs 84.4%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 87.1% to Alaska at 73.2%.

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.

On-time performance by carrier on SEA to EUG
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	1,562	87.1%	61 min	1.34%	A
Alaska Airlines	389	73.2%	43 min	1.03%	C

Flight by flight

SkyWest flight numbers on SEA to EUG

Departure window

When SkyWest runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am314 flights90.3%
11am–2pm184 flights79.6%
2pm–5pm400 flights89.6%
5pm–8pm134 flights75.4%
8pm–5am530 flights89.1%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 90.3% of the time, against 75.4% for the evening window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 530 flights scheduled in it.

Across the year

SkyWest on SEA to EUG through the year

Darker means more delays. Figures are on-time percentages.November best, March worst

November is the best month on the calendar at 95.9% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. June was the busiest month here, with 156 flights.

Across the week, Tuesday is the strongest day at 90.3% on time and Thursday the weakest at 84.5%. 6 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

One category carries most of the weight here. Carrier accounts for 57% of the 12,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
57%
Extreme weather
17%
Late-arriving aircraft
17%
National Airspace System
9%
Security
0%

Extreme weather accounts for 17% 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 2.8 times the usual weather exposure. The split is drawn from 12,011 reported delay minutes.

The largest share of delay minutes, 57%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 6,831 of the 12,000 delay minutes reported here.

Cancellations sit at 1.34% against a national 1.81%, which is ordinary. Diversions add another 0.06%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.1% 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.

At 234 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 runs 88.3% on time across 1,565 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.

The sample behind these figures is 1,562 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

What to do with this

Booking SkyWest on SEA to EUG

Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 95.9% on time and March 80.7%, a swing of 15 points. If the dates move at all, move them out of March before you think about anything else. 1,540 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures