Flight number record

OO 3800

SkyWest Airlines · Great Falls to Salt Lake City

Route: GTF → SLC
Departs: 18:10
Flights: 311
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3800, 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 3800 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 311 flights, with a median arrival 11 minutes early.

Set against the rest of the country, OO 3800's record is 11 points better than the US average of 77.6%. That gap is worth roughly 111 fewer late arrivals for every thousand flights.

On time

88.7%

Arrivals under 15 minutes late, of 309 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.64%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 311 flights between July 2025 and June 2026. The median arrival is 11 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 3800 flies

OO 3800 flies GTF to SLC without a single fixed slot. Its most common scheduled departure was 18:10, used on 61 of 311 flights, with 18:20 (43 flights) and 18:22 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:1061 flights19.6%
Departs 18:2043 flights13.8%
Departs 18:2236 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 18:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3800 runs 21 points better at 88.7%. 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 3800 next to GTF to SLC

Every carrier on GTF to SLC combined arrived on time 92.3% of the time across 1,071 flights, so OO 3800 is 4 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 10 points.

OO 3800 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3800thin sample	311	88.7%	58 min	0.64%	A+
All SkyWest Airlines on GTF–SLC	1,071	92.3%	78 min	0.75%	A+
All carriers on GTF–SLC	1,071	92.3%	78 min	0.75%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3800 quarter by quarter

Quarter by quarter OO 3800 held fairly steady: 91.0% in Jul–Sep 2025, 91.8% in Oct–Dec 2025, 82.7% in Jan–Mar 2026 and 88.3% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202589 flights91.0%
Oct–Dec 202586 flights91.8%
Jan–Mar 202676 flights82.7%
Apr–Jun 202660 flights88.3%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3800 did best on Tuesday at 95.9% on time and worst on Sunday at 81.8%. Each day rests on about 44 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3800 runs late

One category carries most of the weight here. Carrier accounts for 71% of the 2,029 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
71%
Extreme weather
18%
National Airspace System
11%

Extreme weather accounts for 18% 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 2.8 times the usual weather exposure. The split is drawn from 2,029 delay minutes reported on OO 3800.

Cancellations are rare at 0.64%, 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

Badly late arrivals are rare here: only 3.9% 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.

OO 3800 is not only a GTF to SLC flight. It also flew SLC to GTF (258 flights, 87.5% 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. 311 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 3800
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to GTFthin sample	258	87.5%	55 min	0.78%	A+

What to do with this

Booking OO 3800

For a booking, OO 3800 has one of the better records a US domestic flight can show: 88.7% on time and 0.64% cancelled. That is a base rate, not a promise about any single day.

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