Flight number record
OO 3828
SkyWest Airlines · Salt Lake City to Billings
- Route
- SLC → BIL
- Departs
- 16:14
- Flights
- 346
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3828, 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 3828 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 346 flights, with a median arrival 8 minutes early.
Set against the rest of the country, OO 3828's record is 10 points better than the US average of 77.3%. That gap is worth roughly 99 fewer late arrivals for every thousand flights.
Key figures
On time
87.2%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.89%
1 hour+ late
5.2%
National rate is 8.3%
These figures cover 346 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 3828 flies
OO 3828 flies SLC to BIL without a single fixed slot. Its most common scheduled departure was 16:14, used on 56 of 346 flights, with 16:10 (37 flights) and 16:17 (36 flights) next.
- Departs 16:1456 flights16.2%
- Departs 16:1037 flights10.7%
- Departs 16:1736 flights10.4%
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 16:14 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 3828 runs 15 points better at 87.2%. 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 3828 next to SLC to BIL
Every carrier on SLC to BIL combined arrived on time 87.2% of the time across 1,074 flights, so OO 3828 is about level with it. SkyWest flew 709 flights on the same city pair under all its flight numbers, including this one, and those ran 91.1% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3828thin sample | 346 | 87.2% | 76 min | 0.29% | A+ |
| All SkyWest Airlines on SLC–BIL | 709 | 91.1% | 70 min | 0.56% | A+ |
| All carriers on SLC–BIL | 1,074 | 87.2% | 64 min | 0.47% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3828 quarter by quarter
OO 3828 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 78.9%, a swing of 21 points on roughly 69 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 flights100.0%
- Oct–Dec 202588 flights93.1%
- Jan–Mar 202676 flights78.9%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202661 flights80.0%
Scale runs 70% to 100%.
By weekday, OO 3828 did best on Tuesday at 96.2% on time and worst on Friday at 78.8%. Each day rests on about 49 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3828 runs when it is late
OO 3828 often beats the schedule: 86 of 344 completed flights, 25%, arrived 15 minutes or more early. The 44 late arrivals split 17 under half an hour, 9 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early86 flights25.0%
- Within 15 min214 flights62.2%
- 15–29 min late17 flights4.9%
- 30–59 min late9 flights2.6%
- 1–2 hours late9 flights2.6%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
6 of 45 late departures made up the time and arrived on time, 13% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 3828
The latest arrival of the period was on 26 March 2026, 4 hours 40 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).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 March 2026 | 4 hours 40 minutes | Extreme weather |
| 20 February 2026 | 4 hours 32 minutes | Carrier |
| 19 March 2026 | 4 hours 20 minutes | Carrier |
| 5 February 2026 | 3 hours 30 minutes | Carrier |
| 14 August 2026 | 3 hours 28 minutes | Carrier |
Delay causes
Why OO 3828 runs late
Carrier accounts for 86% of the 3,351 delay minutes carriers reported here, and the remaining four split what is left.
- 86%Carrier
- 13%Extreme weather
- 1%National Airspace System
Extreme weather accounts for 13% 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 2.2 times the usual weather exposure. The split is drawn from 3,351 delay minutes reported on OO 3828.
Cancellations are rare at 0.29%, 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
5.2% 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 a little over an hour, which a normal layover absorbs.
OO 3828 is not only a SLC to BIL flight. It also flew BIL to SLC (346 flights, 85.1% 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. 346 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 |
|---|---|---|---|---|---|
| BIL to SLCthin sample | 346 | 85.1% | 86 min | 0.58% | A+ |
What to do with this
Booking OO 3828
For a booking, OO 3828 has one of the better records a US domestic flight can show: 87.2% on time and 0.29% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to BIL, every carrier and departure
- BIL to SLC, the return direction
- Delta Air Lines 1340 on the same route79.7%
- SkyWest Airlines 4038 on the same route94.9%
- Salt Lake City International (SLC) 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.