Carrier route record
OOBZN→SEA
SkyWest Airlines · Bozeman to Seattle
- Flights
- 948
- Period
- July 2025 to June 2026
- Share of route
- 60%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on BZN to SEA 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 a little over an hour. That rests on 948 flights, with a median arrival 9 minutes early.
Set against the rest of the country, SkyWest's BZN to SEA record is 9 points better than the US average of 77.6%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.
Key figures
On time
86.3%
Arrivals under 15 minutes late, of 943 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
0.21%
National rate is 1.81%
Whole route
84.4%
Every carrier on BZN to SEA, 1,571 flights
These figures cover 948 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 BZN to SEA
SkyWest flew 948 of the 1,571 flights on BZN to SEA, most of the route. Its 86.3% on time is 2 points better than the route as a whole, which runs 84.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 100.0% to Alaska at 81.5%. 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| SkyWest Airlines (this page) | 948 | 86.3% | 70 min | 0.21% | A+ |
| Alaska Airlines | 622 | 81.5% | 63 min | 1.45% | 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 948 flights.
- 5am–8am308 flights92.5%
- 8am–11am55 flights87.3%
- 11am–2pm183 flights83.0%
- 2pm–5pm252 flights84.9%
- 5pm–8pm130 flights83.1%
- 8pm–5am20 flights—
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 83.0% on time against 92.5% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5am–8am window is the busiest, with 308 flights scheduled in it.
Across the year
SkyWest on BZN to SEA through the year
June is the worst month at 77.8% on time, 16 points below September, the best at 93.3%. 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. December was the busiest month here, with 101 flights.
Across the week, Wednesday is the strongest day at 89.9% on time and Friday the weakest at 82.8%. 7 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 56% of the 8,977 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.
- 56%Carrier
- 17%Extreme weather
- 14%Late-arriving aircraft
- 13%National Airspace System
- 0%Security
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 8,977 reported delay minutes.
The largest share of delay minutes, 56%, 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 5,029 of the 8,977 delay minutes reported here.
Cancellations are rare at 0.21%, 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 4.6% 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 543 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 87.4% on time across 948 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. 948 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 BZN to SEA
Put together: treat all of this as provisional. 948 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. 943 completed flights over 12 months sit behind that.
Related
Where to go next
- BZN to SEA, every carrier
- SkyWest on SEA to BZN, the return leg
- Alaska Airlines on BZN to SEA81.5%
- SkyWest Airlines network-wide record
- Seattle-Tacoma International (SEA) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
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.