Carrier route record

OOSEA→GEG

SkyWest Airlines · Seattle to Spokane

Flights: 3,058
Period: July 2025 to June 2026
Share of route: 59%
Carriers: 3

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

SkyWest on SEA to GEG 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 55 minutes. That rests on 3,058 flights, with a median arrival 10 minutes early.

Set against the rest of the country, SkyWest's SEA to GEG record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 3,022 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

1.05%

National rate is 1.81%

Whole route

82.5%

Every carrier on SEA to GEG, 5,221 flights

These figures cover 3,058 flights between July 2025 and June 2026. The median arrival is 10 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 GEG

SkyWest flew 3,058 of the 5,221 flights on SEA to GEG, most of the route. Its 87.7% on time is 5 points better than the route as a whole, which runs 82.5%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 87.7% to Delta at 72.7%. 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.

On-time performance by carrier on SEA to GEG
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	3,058	87.7%	55 min	1.05%	A
Alaska Airlines	1,820	75.6%	43 min	0.82%	B+
Delta Air Linesthin sample	343	72.7%	79 min	1.46%	C

Flight by flight

SkyWest flight numbers on SEA to GEG

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 13 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–8am365 flights96.1%
8am–11am553 flights86.3%
11am–2pm736 flights85.6%
2pm–5pm425 flights83.2%
5pm–8pm442 flights88.3%
8pm–5am537 flights89.1%

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 96.1% of the time, against 83.2% for the afternoon window. That is 13 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 736 flights scheduled in it.

Across the year

SkyWest on SEA to GEG through the year

Darker means more delays. Figures are on-time percentages.May best, July worst

July is the worst month at 81.0% on time, 11 points below May, the best at 91.7%. 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. July was the busiest month here, with 333 flights.

Across the week, Saturday is the strongest day at 91.1% on time and Thursday the weakest at 81.9%. 9 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 45% of the 20,000 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
45%
Extreme weather
32%
National Airspace System
12%
Late-arriving aircraft
11%

Extreme weather accounts for 32% 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 5.2 times the usual weather exposure. The split is drawn from 20,335 reported delay minutes.

The largest share of delay minutes, 45%, 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 9,206 of the 20,000 delay minutes reported here.

Cancellations sit at 1.05% against a national 1.81%, which is ordinary. Diversions add another 0.13%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.2% 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 224 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 runs 88.2% on time across 3,020 flights, within half 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 3,058 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 GEG

Put together: take the 5am–8am departure, avoid July if the dates are flexible, and if two carriers are within a few dollars of each other, Alaska is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 13 points, which is the most any booking decision can do. 3,022 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