Flight number record

OO 5313

SkyWest Airlines · Arcata/Eureka to San Francisco

Route: ACV → SFO
Departs: 06:00
Flights: 364
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5313, 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 5313 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 364 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.3%, so OO 5313 runs 5 points behind the country as a whole. Across a thousand flights that is about 50 extra late arrivals.

On time

72.3%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

95 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.89%

1 hour+ late

9.5%

National rate is 8.3%

These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When OO 5313 flies

OO 5313 flies ACV to SFO without a single fixed slot. Its most common scheduled departure was 06:00, used on 143 of 364 flights, with 07:16 (44 flights) next.

Departs 06:00143 flights39.3%
Departs 07:1644 flights12.1%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5313 runs 17 points worse at 72.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

OO 5313 next to ACV to SFO

Every carrier on ACV to SFO combined arrived on time 56.5% of the time across 1,291 flights, so OO 5313 is 16 points ahead of it. SkyWest flew 1,271 flights on the same city pair under all its flight numbers, including this one, and those ran 57.3% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 6 points.

OO 5313 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5313thin sample	364	72.3%	95 min	1.65%	C
All SkyWest Airlines on ACV–SFO	1,271	57.3%	80 min	2.75%	D
All carriers on ACV–SFO	1,291	56.5%	79 min	2.71%	D
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 5313 quarter by quarter

OO 5313 did not run the same all year. Its best quarter was Apr–Jun 2026 at 86.0% on time and its weakest Oct–Dec 2025 at 55.6%, a swing of 30 points on roughly 73 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 flights60.0%
Oct–Dec 202591 flights55.6%
Jan–Mar 202690 flights75.3%
Apr–Jun 202691 flights86.0%
Jul–Sep 202662 flights79.0%

Scale runs 45% to 90%.

By weekday, OO 5313 did best on Saturday at 82.4% on time and worst on Sunday at 64.7%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 5313 runs when it is late

The 99 late arrivals split 46 under half an hour, 19 between 30 and 60 minutes, and 34 an hour or more.

15+ min early89 flights24.9%
Within 15 min169 flights47.3%
15–29 min late46 flights12.9%
30–59 min late19 flights5.3%
1–2 hours late12 flights3.4%
2+ hours late22 flights6.2%

Scale runs 0% to 100%.

Share of 357 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 45 departures that left 15 minutes late or more, only 1 made it up before arrival. In the other direction, 55 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 SFO.

The worst days

Worst days for OO 5313

The latest arrival of the period was on 18 August 2026, 10 hours 35 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across August, May, January and June, with no single month standing out.

The latest arrivals of OO 5313 in the period
Date	Arrived late by	Largest filed cause
18 August 2026	10 hours 35 minutes	National Airspace System
29 May 2026	10 hours	Extreme weather
18 January 2026	9 hours 19 minutes	Late-arriving aircraft
19 January 2026	8 hours 16 minutes	Extreme weather
27 June 2026	8 hours 12 minutes	Late-arriving aircraft

Delay causes

Why OO 5313 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 9,437 reported delay minutes.

Carrier
38%
Extreme weather
23%
National Airspace System
22%
Late-arriving aircraft
17%

Extreme weather accounts for 23% 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 3.9 times the usual weather exposure. The split is drawn from 9,437 delay minutes reported on OO 5313.

Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

The same number turns up on one other city pair in the data, including FWA to ORD (1), but none flew often enough under OO 5313 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ACV to SFO only.

One caution: this is a thin sample. 364 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 5313

For a booking, read OO 5313 as 72.3% on time with 1.65% cancelled over 364 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