Flight number record

OO 3481

SkyWest Airlines · Boise to San Diego

Route: BOI → SAN
Departs: 19:55
Flights: 257
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 257 flights, with a median arrival 2 minutes early.

On time

77.5%

Arrivals under 15 minutes late, of 253 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.78%

National rate is 1.89%

1 hour+ late

7.5%

National rate is 8.3%

These figures cover 257 flights between September 2025 and August 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.

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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 35 of 257 flights, with 19:31 (34 flights) and 20:18 (33 flights) next.

Departs 19:5535 flights13.6%
Departs 19:3134 flights13.2%
Departs 20:1833 flights12.8%

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 19:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3481 runs 10 points better at 77.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

OO 3481 next to BOI to SAN

Every carrier on BOI to SAN combined arrived on time 79.9% of the time across 1,033 flights, so OO 3481 is 2 points behind it. Across its whole network SkyWest Airlines managed 78.7%, 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	257	77.5%	63 min	0.78%	B+
All SkyWest Airlines on BOI–SANthin sample	355	79.4%	58 min	0.85%	B+
All carriers on BOI–SAN	1,033	79.9%	50 min	0.77%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	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 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 202530 flights—
Oct–Dec 202590 flights81.6%
Jan–Mar 202675 flights80.0%
Apr–Jun 202649 flights71.4%
Jul–Sep 202613 flights—

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

By weekday, OO 3481 did best on Saturday at 91.9% on time and worst on Friday at 58.3%. Each day rests on about 37 flights, so a gap of 34 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 3481 runs when it is late

The 57 late arrivals split 19 under half an hour, 19 between 30 and 60 minutes, and 19 an hour or more.

15+ min early47 flights18.6%
Within 15 min149 flights58.9%
15–29 min late19 flights7.5%
30–59 min late19 flights7.5%
1–2 hours late11 flights4.3%
2+ hours late8 flights3.2%

Scale runs 0% to 100%.

Share of 253 completed flights by arrival against schedule.

10 of 53 late departures made up the time and arrived on time, 19% of them. In the other direction, 14 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SAN.

The worst days

Worst days for OO 3481

The latest arrival of the period was on 18 May 2026, 6 hours 44 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.

The latest arrivals of OO 3481 in the period
Date	Arrived late by	Largest filed cause
18 May 2026	6 hours 44 minutes	Late-arriving aircraft
2 January 2026	3 hours 43 minutes	National Airspace System
12 January 2026	2 hours 37 minutes	Late-arriving aircraft
10 November 2025	2 hours 26 minutes	National Airspace System
3 March 2026	2 hours 22 minutes	Late-arriving aircraft

Delay causes

Why OO 3481 runs late

Late-arriving aircraft accounts for 44% of the 3,587 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
44%
National Airspace System
36%
Carrier
15%
Extreme weather
5%

44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,587 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 3,587 delay minutes reported on OO 3481.

Cancellations are rare at 0.78%, 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

7.5% 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 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.

Every one of the 257 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. 257 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 77.5% on time with 0.78% cancelled over 257 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures