Flight number record

OO 5583

SkyWest Airlines · Tucson to San Francisco

Route: TUS → SFO
Departs: 13:40
Flights: 334
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5583, 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 5583 lands a B+, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 334 flights, with a median arrival 7 minutes early.

On time

76.5%

Arrivals under 15 minutes late, of 332 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

National rate is 1.81%

1 hour+ late

10.8%

National rate is 8.1%

These figures cover 334 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% 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 5583 flies

OO 5583 flies TUS to SFO without a single fixed slot. Its most common scheduled departure was 13:40, used on 102 of 334 flights, with 12:40 (56 flights) and 12:35 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:40102 flights30.5%
Departs 12:4056 flights16.8%
Departs 12:3553 flights15.9%

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 13:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5583 runs 2 points worse at 76.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5583 next to TUS to SFO

Every carrier on TUS to SFO combined arrived on time 71.7% of the time across 966 flights, so OO 5583 is 5 points ahead of it. SkyWest flew 904 flights on the same city pair under all its flight numbers, including this one, and those ran 71.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 3 points.

OO 5583 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5583thin sample	334	76.5%	75 min	0.30%	B+
All SkyWest Airlines on TUS–SFO	904	71.9%	70 min	0.33%	C+
All carriers on TUS–SFO	966	71.7%	71 min	0.41%	C+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5583 quarter by quarter

OO 5583 did not run the same all year. Its best quarter was Jul–Sep 2025 at 94.2% on time and its weakest Apr–Jun 2026 at 58.9%, a swing of 35 points on roughly 84 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 202586 flights94.2%
Oct–Dec 202567 flights79.1%
Jan–Mar 202690 flights75.3%
Apr–Jun 202691 flights58.9%

Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5583 did best on Tuesday at 85.7% on time and worst on Friday at 61.7%. Each day rests on about 48 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5583 runs late

One category carries most of the weight here. National Airspace System accounts for 50% of the 5,872 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.

National Airspace System
50%
Late-arriving aircraft
30%
Carrier
17%
Extreme weather
3%

50% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,950 minutes out of 5,872, against a national NAS share of 21%. The split is drawn from 5,872 delay minutes reported on OO 5583.

Cancellations are rare at 0.30%, 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% 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 751 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.

The same number turns up on one other city pair in the data, including SFO to RNO (66), but none flew often enough under OO 5583 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to TUS to SFO only.

One caution: this is a thin sample. 334 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 5583

For a booking, read OO 5583 as 76.5% on time with 0.30% cancelled over 334 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