Flight number record

OO 3828

SkyWest Airlines · Billings to Salt Lake City

Route: BIL → SLC
Departs: 18:15
Flights: 345
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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+. 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 an hour and a half. That rests on 345 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 3828's 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.

On time

86.3%

Arrivals under 15 minutes late, of 342 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

National rate is 1.81%

1 hour+ late

5.3%

National rate is 8.1%

These figures cover 345 flights between July 2025 and June 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.

Schedule

When OO 3828 flies

OO 3828 flies BIL to SLC without a single fixed slot. Its most common scheduled departure was 18:15, used on 59 of 345 flights, with 18:19 (56 flights) and 18:26 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:1559 flights17.1%
Departs 18:1956 flights16.2%
Departs 18:2640 flights11.6%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3828 runs 18 points better at 86.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 3828 next to BIL to SLC

Every carrier on BIL to SLC combined arrived on time 91.6% of the time across 1,074 flights, so OO 3828 is 5 points behind it. SkyWest flew 708 flights on the same city pair under all its flight numbers, including this one, and those ran 90.7% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 7 points.

OO 3828 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3828thin sample	345	86.3%	84 min	0.58%	A+
All SkyWest Airlines on BIL–SLC	708	90.7%	79 min	0.71%	A+
All carriers on BIL–SLC	1,074	91.6%	84 min	0.65%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	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 91.1% on time and its weakest Jan–Mar 2026 at 76.0%, a swing of 15 points on roughly 86 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 202590 flights91.1%
Oct–Dec 202588 flights87.2%
Jan–Mar 202676 flights76.0%
Apr–Jun 202691 flights89.0%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3828 did best on Tuesday at 92.5% on time and worst on Wednesday at 78.0%. Each day rests on about 49 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3828 runs late

One category carries most of the weight here. Carrier accounts for 85% of the 3,926 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.

Carrier
85%
Extreme weather
12%
National Airspace System
4%

Extreme weather accounts for 12% 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 1.9 times the usual weather exposure. The split is drawn from 3,926 delay minutes reported on OO 3828.

Cancellations are rare at 0.58%, 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 routes

What a delay on this flight costs

5.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

OO 3828 is not only a BIL to SLC flight. It also flew SLC to BIL (345 flights, 89.0% 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. 345 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.

Other routes flown as OO 3828
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to BILthin sample	345	89.0%	74 min	0.29%	A+

What to do with this

Booking OO 3828

For a booking, OO 3828 is one of the weaker ways to fly BIL to SLC: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures