Carrier route record

OOGEG→DEN

SkyWest Airlines · Spokane to Denver

Flights: 250
Period: July 2025 to June 2026
Share of route: 12%
Carriers: 4

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

SkyWest on GEG to DEN earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 250 flights. The strongest carrier on the route with a full sample, United Airlines, flew 833 at 85.4% on time.

Set against the rest of the country, SkyWest's GEG to DEN record is 9 points better than the US average of 77.6%. That gap is worth roughly 91 fewer late arrivals for every thousand flights.

On time

86.7%

Arrivals under 15 minutes late, of 248 completed flights

Avg delay

105 min

Across delayed arrivals only, not all flights

Cancelled

0.80%

National rate is 1.81%

Whole route

83.8%

Every carrier on GEG to DEN, 2,063 flights

These figures cover 250 flights between July 2025 and June 2026. The median arrival is 6 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 GEG to DEN

SkyWest flew 250 of the 2,063 flights on GEG to DEN, about 12% of it. Its 86.7% on time is 3 points better than the route as a whole, which runs 83.8%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from SkyWest at 86.7% to Frontier at 77.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on GEG to DEN
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)thin sample	250	86.7%	105 min	0.80%	A+
United Airlines	833	85.4%	83 min	0.36%	A+
Southwest Airlines	858	82.4%	54 min	0.00%	B+
Frontier Airlinesthin sample	122	77.7%	36 min	0.00%	B+

No carrier stands out. United tops the table at 85.4%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Departure window

When SkyWest runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 250 flights.

There are not enough flights in each departure window to split SkyWest's GEG to DEN record by time of day without the percentages moving on noise. The headline rate of 86.7% is the reliable figure here.

Across the year

SkyWest on GEG to DEN through the year

Jul–Sep 202543 flights81.4%
Oct–Dec 202591 flights88.9%
Jan–Mar 202666 flights84.6%
Apr–Jun 202650 flights90.0%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 86.7% on time across 250 flights.

Quarter by quarter SkyWest on GEG to DEN held fairly steady: 81.4% in Jul–Sep 2025, 88.9% in Oct–Dec 2025, 84.6% in Jan–Mar 2026 and 90.0% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Sunday is the strongest day at 91.7% on time and Monday the weakest at 75.0%. 17 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,447 reported delay minutes.

Extreme weather
34%
Carrier
34%
National Airspace System
16%
Late-arriving aircraft
15%

Extreme weather accounts for 34% 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 5.5 times the usual weather exposure. The split is drawn from 3,447 reported delay minutes.

The largest share of delay minutes, 34%, 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 1,177 of the 3,447 delay minutes reported here.

Cancellations are rare at 0.80%, below the national 1.81% 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 costs

6.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.

The 836 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg is a different operation and performs like one: it runs 90.3% on time across 250 flights, 4 points above 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 4 points of difference.

One caution: this is a thin sample. 250 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.

What to do with this

Booking SkyWest on GEG to DEN

Put together: treat all of this as provisional. 250 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 86.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 248 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