Flight number record
OO 4104
SkyWest Airlines · Seattle to Bozeman
- Route
- SEA → BZN
- Departs
- 11:45
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4104, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 4104 lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 255 flights, with a median arrival 7 minutes early.
Set against the rest of the country, OO 4104's record is 5 points better than the US average of 77.3%. That gap is worth roughly 50 fewer late arrivals for every thousand flights.
Key figures
On time
82.3%
Arrivals under 15 minutes late, of 254 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
0.39%
National rate is 1.89%
1 hour+ late
4.3%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. The median arrival is 7 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.
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Schedule
When OO 4104 flies
OO 4104 flies SEA to BZN without a single fixed slot. Its most common scheduled departure was 11:45, used on 45 of 255 flights, with 11:40 (40 flights) and 11:36 (38 flights) next.
- Departs 11:4545 flights17.6%
- Departs 11:4040 flights15.7%
- Departs 11:3638 flights14.9%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 11:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4104 runs 4 points better at 82.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4104 next to SEA to BZN
Every carrier on SEA to BZN combined arrived on time 81.6% of the time across 1,566 flights, so OO 4104 is about level with it. SkyWest flew 937 flights on the same city pair under all its flight numbers, including this one, and those ran 84.2% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4104thin sample | 255 | 82.3% | 56 min | 0.39% | B+ |
| All SkyWest Airlines on SEA–BZN | 937 | 84.2% | 54 min | 0.21% | B+ |
| All carriers on SEA–BZN | 1,566 | 81.6% | 52 min | 0.45% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4104 quarter by quarter
Quarter by quarter OO 4104 held fairly steady: 79.8% in Jan–Mar 2026, 85.7% in Apr–Jun 2026 and 79.0% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights79.8%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights79.0%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4104 did best on Monday at 89.2% on time and worst on Thursday at 75.0%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4104 runs when it is late
OO 4104 often beats the schedule: 65 of 254 completed flights, 26%, arrived 15 minutes or more early. Most of the lateness is short. 23 of the 45 late arrivals were under half an hour behind, and 11 reached an hour or more.
- 15+ min early65 flights25.6%
- Within 15 min144 flights56.7%
- 15–29 min late23 flights9.1%
- 30–59 min late11 flights4.3%
- 1–2 hours late7 flights2.8%
- 2+ hours late4 flights1.6%
Scale runs 0% to 100%.
Share of 254 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 34 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 15 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BZN.
The worst days
Worst days for OO 4104
The latest arrival of the period was on 15 January 2026, 6 hours 12 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 January 2026 | 6 hours 12 minutes | Extreme weather |
| 16 July 2026 | 5 hours 57 minutes | Extreme weather |
| 23 July 2026 | 2 hours 30 minutes | Carrier |
| 17 February 2026 | 2 hours 1 minute | Carrier |
| 25 July 2026 | 1 hour 47 minutes | Carrier |
Delay causes
Why OO 4104 runs late
Carrier accounts for 49% of the 2,516 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 41%Extreme weather
- 9%National Airspace System
- 1%Security
Extreme weather accounts for 41% 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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 6.8 times the usual weather exposure. The split is drawn from 2,516 delay minutes reported on OO 4104.
Cancellations are rare at 0.39%, below the national 1.89% 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.3% 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.
The same number turns up on five other city pairs in the data, including BZN to SEA (165), DTW to PIT (34) and PIT to DTW (34), but none flew often enough under OO 4104 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to BZN only.
One caution: this is a thin sample. 255 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 OO 4104
For a booking, read OO 4104 as 82.3% on time with 0.39% cancelled over 255 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to BZN, every carrier and departure
- BZN to SEA, the return direction
- SkyWest Airlines 4039 on the same route82.7%
- Seattle-Tacoma International (SEA) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.