Flight number record

OO 3481

SkyWest Airlines · Boise to San Diego

Route: BOI → SAN
Departs: 19:55
Flights: 305
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3481, 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 3481 lands a B+, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 305 flights, with a median arrival 2 minutes early.

On time

78.4%

Arrivals under 15 minutes late, of 301 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

0.66%

National rate is 1.81%

1 hour+ late

6.6%

National rate is 8.1%

These figures cover 305 flights between July 2025 and June 2026. The median arrival is 2 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 3481 flies

OO 3481 flies BOI to SAN without a single fixed slot. Its most common scheduled departure was 19:55, used on 77 of 305 flights, with 20:18 (45 flights) and 19:31 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:5577 flights25.2%
Departs 20:1845 flights14.8%
Departs 19:3134 flights11.1%

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 19:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3481 runs 10 points better at 78.4%. 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 3481 next to BOI to SAN

Every carrier on BOI to SAN combined arrived on time 82.1% of the time across 1,039 flights, so OO 3481 is 4 points behind it. Across its whole network SkyWest Airlines managed 79.0%, close to this flight's figure.

OO 3481 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3481thin sample	305	78.4%	61 min	0.66%	B+
All SkyWest Airlines on BOI–SAN	404	82.2%	60 min	0.50%	B+
All carriers on BOI–SAN	1,039	82.1%	50 min	0.58%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3481 quarter by quarter

OO 3481 did not run the same all year. Its best quarter was Oct–Dec 2025 at 81.6% on time and its weakest Apr–Jun 2026 at 71.4%, a swing of 10 points on roughly 76 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 202591 flights77.8%
Oct–Dec 202590 flights81.6%
Jan–Mar 202675 flights80.0%
Apr–Jun 202649 flights71.4%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3481 did best on Wednesday at 92.9% on time and worst on Sunday at 65.9%. Each day rests on about 44 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3481 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 3,945 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.

Late-arriving aircraft
46%
National Airspace System
30%
Carrier
18%
Extreme weather
5%

46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,945 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,945 delay minutes reported on OO 3481.

Cancellations are rare at 0.66%, 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

6.6% 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 about an hour, which a normal layover absorbs.

The 749 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 305 flights under OO 3481 in the data flew BOI to SAN. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 305 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 3481

For a booking, read OO 3481 as 78.4% on time with 0.66% cancelled over 305 flights. Those are rates from the past twelve months, not a forecast for any particular 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