Carrier route record
OOSLC→GEG
SkyWest Airlines · Salt Lake City to Spokane
- Flights
- 739
- Period
- July 2025 to June 2026
- Share of route
- 44%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SLC 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 739 flights, with a median arrival 9 minutes early.
Set against the rest of the country, SkyWest's SLC to GEG record is 15 points better than the US average of 77.6%. That gap is worth roughly 153 fewer late arrivals for every thousand flights.
Key figures
On time
92.9%
Arrivals under 15 minutes late, of 733 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
0.14%
National rate is 1.81%
Whole route
86.7%
Every carrier on SLC to GEG, 1,666 flights
These figures cover 739 flights between July 2025 and June 2026. The median arrival is 9 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 SLC to GEG
SkyWest flew 739 of the 1,666 flights on SLC to GEG, about 44% of it. Its 92.9% on time is 6 points better than the route as a whole, which runs 86.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 92.9% to Delta at 81.8%.
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 (this page) | 739 | 92.9% | 57 min | 0.14% | A+ |
| Delta Air Lines | 927 | 81.8% | 80 min | 0.76% | B+ |
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 739 flights.
- 5am–8am—
- 8am–11am336 flights96.1%
- 11am–2pm26 flights—
- 2pm–5pm153 flights91.4%
- 5pm–8pm224 flights88.4%
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 96.1% on time for the 8am–11am window against 88.4% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection. The 8am–11am window is the busiest, with 336 flights scheduled in it.
Across the year
SkyWest on SLC to GEG through the year
Delays peak in March, when the on-time rate falls to 88.8%. August is the strongest month at 98.2%. Moving a flexible trip across that boundary buys 9 points. April was the busiest month here, with 102 flights.
Across the week, Saturday is the strongest day at 96.9% on time and Sunday the weakest at 89.2%. 8 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 78% of the 2,962 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.
- 78%Carrier
- 19%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 19% 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 3.0 times the usual weather exposure. The split is drawn from 2,962 reported delay minutes.
The largest share of delay minutes, 78%, 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 2,304 of the 2,962 delay minutes reported here.
Cancellations are rare at 0.14%, 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
Badly late arrivals are rare here: only 2.2% 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.
The 546 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 runs 93.7% on time across 739 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. 739 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 SLC to GEG
Put together: treat all of this as provisional. 739 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 92.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 733 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to GEG, every carrier
- SkyWest on GEG to SLC, the return leg
- Delta Air Lines on SLC to GEG81.8%
- SkyWest Airlines network-wide record
- Salt Lake City International (SLC) delay statistics
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
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.