Flight number record

OO 4715

SkyWest Airlines · San Francisco to Arcata/Eureka

Route: SFO → ACV
Departs: 13:20
Flights: 256
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4715, 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 4715 sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 256 flights, with a median arrival 6 minutes early.

On time

75.9%

Arrivals under 15 minutes late, of 245 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

2.73%

National rate is 1.81%

1 hour+ late

10.6%

National rate is 8.1%

These figures cover 256 flights between July 2025 and June 2026. Beyond the headline rate, 10.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 4715 flies

OO 4715 flies SFO to ACV without a single fixed slot. Its most common scheduled departure was 13:20, used on 98 of 256 flights, with 13:30 (70 flights) and 14:08 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:2098 flights38.3%
Departs 13:3070 flights27.3%
Departs 14:0838 flights14.8%

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 13:20 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4715 runs 3 points worse at 75.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4715 next to SFO to ACV

Every carrier on SFO to ACV combined arrived on time 76.4% of the time across 1,285 flights, so OO 4715 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 3 points.

OO 4715 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4715thin sample	256	75.9%	74 min	2.73%	B
All SkyWest Airlines on SFO–ACV	1,285	76.4%	91 min	2.72%	B
All carriers on SFO–ACV	1,285	76.4%	91 min	2.72%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4715 quarter by quarter

OO 4715 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.8% on time and its weakest Jan–Mar 2026 at 72.2%, a swing of 12 points on roughly 64 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 202569 flights72.5%
Oct–Dec 202592 flights77.6%
Jan–Mar 202657 flights72.2%
Apr–Jun 202638 flights83.8%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4715 did best on Friday at 86.1% on time and worst on Tuesday at 67.7%. Each day rests on about 37 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4715 runs late

One category carries most of the weight here. Carrier accounts for 55% of the 4,374 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
55%
National Airspace System
21%
Late-arriving aircraft
18%
Extreme weather
7%

The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,399 of the 4,374 delay minutes reported here. The split is drawn from 4,374 delay minutes reported on OO 4715.

Cancellations run at 2.73%, against 1.81% nationally. That is roughly one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The same number turns up on five other city pairs in the data, including SBA to SFO (93), CHA to ORD (24) and MAF to IAH (20), but none flew often enough under OO 4715 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to ACV only.

One caution: this is a thin sample. 256 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 4715

For a booking, the cancellation rate is the figure to plan around on OO 4715: 2.73% of its 256 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

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