Carrier route record

OOGEG→DEN

SkyWest Airlines · Spokane to Denver

Flights: 258
Period: September 2025 to August 2026
Share of route: 13%
Carriers: 4

Historical statistics for September 2025 to August 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 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 258 flights. The strongest carrier on the route with a full sample, United Airlines, flew 826 at 85.8% on time.

Set against the rest of the country, SkyWest's GEG to DEN record is 9 points better than the US average of 77.3%. That gap is worth roughly 90 fewer late arrivals for every thousand flights.

On time

86.3%

Arrivals under 15 minutes late, of 255 completed flights

Avg delay

98 min

Across delayed arrivals only, not all flights

Cancelled

1.16%

National rate is 1.89%

Whole route

84.2%

Every carrier on GEG to DEN, 2,042 flights

These figures cover 258 flights between September 2025 and August 2026. The median arrival is 5 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

SkyWest against every carrier on GEG to DEN

SkyWest flew 258 of the 2,042 flights on GEG to DEN, about 13% of it. Its 86.3% on time is 2 points better than the route as a whole, which runs 84.2%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from SkyWest at 86.3% to Frontier at 80.6%. 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	258	86.3%	98 min	1.16%	A
United Airlines	826	85.8%	86 min	0.36%	A+
Southwest Airlines	859	82.4%	54 min	0.12%	B+
Frontier Airlinesthin sample	99	80.6%	32 min	0.00%	B+

No carrier stands out. United tops the table at 85.8%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.

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

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 258 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 86.3% is the reliable figure here.

Across the year

SkyWest on GEG to DEN through the year

Jul–Sep 202530 flights93.3%
Oct–Dec 202591 flights88.9%
Jan–Mar 202666 flights84.6%
Apr–Jun 202650 flights90.0%
Jul–Sep 202621 flights—

Scale runs 75% to 100%. 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 86.3% on time across 258 flights.

Quarter by quarter SkyWest on GEG to DEN held fairly steady: 93.3% 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, Friday is the strongest day at 97.1% on time and Monday the weakest at 76.3%, a spread of 21 points.

Arrival by arrival

How late SkyWest on GEG to DEN runs when it is late

The 35 late arrivals split 14 under half an hour, 7 between 30 and 60 minutes, and 14 an hour or more.

15+ min early62 flights24.3%
Within 15 min158 flights62.0%
15–29 min late14 flights5.5%
30–59 min late7 flights2.7%
1–2 hours late8 flights3.1%
2+ hours late6 flights2.4%

Scale runs 0% to 100%.

Share of 255 completed flights by arrival against schedule.

8 of 34 late departures made up the time and arrived on time, 24% of them. 9 flights left on time and still arrived late.

The worst days

Worst days for SkyWest on GEG to DEN

The latest arrival of the period was on 14 January 2026, 18 hours 37 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of SkyWest on GEG to DEN in the period
Date	Arrived late by	Largest filed cause
14 January 2026	18 hours 37 minutes	Extreme weather
8 January 2026	5 hours 6 minutes	Carrier
12 April 2026	3 hours 12 minutes	Carrier
19 May 2026	3 hours	Carrier
27 December 2025	2 hours 46 minutes	Carrier

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 3,423 reported delay minutes.

Extreme weather
33%
Carrier
32%
National Airspace System
16%
Late-arriving aircraft
16%
Security
2%

Extreme weather accounts for 33% 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 5.4 times the usual weather exposure. The split is drawn from 3,423 reported delay minutes.

Cancellations sit at 1.16% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

5.5% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, 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.

The return leg is a different operation and performs like one: it runs 89.4% on time across 258 flights, 3 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 3 points of difference.

One caution: this is a thin sample. 258 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. 258 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 86.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 255 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures