Flight number record
OO 4124
SkyWest Airlines · Seattle to Eugene
- Route
- SEA → EUG
- Departs
- 15:40
- Flights
- 350
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4124, 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 4124 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 45 minutes. That rests on 350 flights, with a median arrival 8 minutes early.
Set against the rest of the country, OO 4124's record is 12 points better than the US average of 77.3%. That gap is worth roughly 115 fewer late arrivals for every thousand flights.
Key figures
On time
88.8%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 350 flights between September 2025 and August 2026. The median arrival is 8 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 4124 flies
OO 4124 flies SEA to EUG without a single fixed slot. Its most common scheduled departure was 15:40, used on 60 of 350 flights, with 15:44 (51 flights) and 15:55 (36 flights) next.
- Departs 15:4060 flights17.1%
- Departs 15:4451 flights14.6%
- Departs 15:5536 flights10.3%
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 15:40 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 4124 runs 17 points better at 88.8%. 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 4124 next to SEA to EUG
Every carrier on SEA to EUG combined arrived on time 84.2% of the time across 1,894 flights, so OO 4124 is 5 points ahead of it. SkyWest flew 1,629 flights on the same city pair under all its flight numbers, including this one, and those ran 84.6% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4124thin sample | 350 | 88.8% | 44 min | 0.57% | A+ |
| All SkyWest Airlines on SEA–EUG | 1,629 | 84.6% | 64 min | 1.35% | B |
| All carriers on SEA–EUG | 1,894 | 84.2% | 60 min | 1.32% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4124 quarter by quarter
OO 4124 did not run the same all year. Its best quarter was Oct–Dec 2025 at 95.6% on time and its weakest Jul–Sep 2026 at 82.3%, a swing of 13 points on roughly 70 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202590 flights95.6%
- Jan–Mar 202677 flights85.3%
- Apr–Jun 202691 flights87.9%
- Jul–Sep 202662 flights82.3%
Scale runs 75% to 100%.
By weekday, OO 4124 did best on Wednesday at 96.1% on time and worst on Thursday at 76.5%. Each day rests on about 50 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4124 runs when it is late
OO 4124 often beats the schedule: 94 of 348 completed flights, 27%, arrived 15 minutes or more early. The 39 late arrivals split 17 under half an hour, 14 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early94 flights27.0%
- Within 15 min215 flights61.8%
- 15–29 min late17 flights4.9%
- 30–59 min late14 flights4.0%
- 1–2 hours late6 flights1.7%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
8 of 40 late departures made up the time and arrived on time, 20% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for OO 4124
The latest arrival of the period was on 21 July 2026, 3 hours 3 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 3 hours 3 minutes | Carrier |
| 29 June 2026 | 2 hours 30 minutes | Carrier |
| 27 May 2026 | 1 hour 38 minutes | Carrier |
| 24 August 2026 | 1 hour 15 minutes | Carrier |
| 14 June 2026 | 1 hour 13 minutes | Carrier |
Delay causes
Why OO 4124 runs late
Carrier accounts for 67% of the 1,732 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Carrier
- 25%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 25% 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 4.1 times the usual weather exposure. The split is drawn from 1,732 delay minutes reported on OO 4124.
Cancellations are rare at 0.57%, 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 2.3% 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.
OO 4124 is not only a SEA to EUG flight. It also flew EUG to SEA (347 flights, 90.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 350 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| EUG to SEAthin sample | 347 | 90.7% | 73 min | 0.58% | A+ |
What to do with this
Booking OO 4124
For a booking, OO 4124 has one of the better records a US domestic flight can show: 88.8% on time and 0.57% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SEA to EUG, every carrier and departure
- EUG to SEA, the return direction
- SkyWest Airlines 3855 on the same route87.5%
- 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.