Flight number record

OO 3736

SkyWest Airlines · Seattle to San Jose

Route: SEA → SJC
Departs: 08:30
Flights: 255
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3736, 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 3736 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 255 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 3736's record is 14 points better than the US average of 77.3%. That gap is worth roughly 137 fewer late arrivals for every thousand flights.

On time

91.0%

Arrivals under 15 minutes late, of 255 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

3.1%

National rate is 8.3%

These figures cover 255 flights between September 2025 and August 2026. The median arrival is 9 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 3736 flies

OO 3736 flies SEA to SJC without a single fixed slot. Its most common scheduled departure was 08:30, used on 75 of 255 flights, with 08:35 (62 flights) and 08:36 (36 flights) next.

Departs 08:3075 flights29.4%
Departs 08:3562 flights24.3%
Departs 08:3636 flights14.1%

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 08:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 3736 runs 7 points better at 91.0%. 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 3736 next to SEA to SJC

Every carrier on SEA to SJC combined arrived on time 80.1% of the time across 4,425 flights, so OO 3736 is 11 points ahead of it. SkyWest flew 1,626 flights on the same city pair under all its flight numbers, including this one, and those ran 85.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.

OO 3736 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3736thin sample	255	91.0%	78 min	0.00%	A+
All SkyWest Airlines on SEA–SJC	1,626	85.7%	59 min	0.18%	A+
All carriers on SEA–SJC	4,425	80.1%	49 min	0.56%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3736 quarter by quarter

Quarter by quarter OO 3736 held fairly steady: 88.9% in Jan–Mar 2026, 96.7% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights88.9%
Apr–Jun 202691 flights96.7%
Jul–Sep 202662 flights90.3%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3736 did best on Saturday at 100.0% on time and worst on Tuesday at 86.1%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 3736 runs when it is late

OO 3736 often beats the schedule: 82 of 255 completed flights, 32%, arrived 15 minutes or more early. The 23 late arrivals split 7 under half an hour, 8 between 30 and 60 minutes, and 8 an hour or more.

15+ min early82 flights32.2%
Within 15 min150 flights58.8%
15–29 min late7 flights2.7%
30–59 min late8 flights3.1%
1–2 hours late3 flights1.2%
2+ hours late5 flights2.0%

Scale runs 0% to 100%.

Share of 255 completed flights by arrival against schedule.

Only 12 of 255 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for OO 3736

The latest arrival of the period was on 31 December 2025, 4 hours 27 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on four of the five worst days.

The latest arrivals of OO 3736 in the period
Date	Arrived late by	Largest filed cause
31 December 2025	4 hours 27 minutes	Extreme weather
13 March 2026	3 hours 43 minutes	Extreme weather
1 January 2026	3 hours 21 minutes	Carrier
30 March 2026	3 hours 10 minutes	Extreme weather
20 January 2026	2 hours 59 minutes	Extreme weather

Delay causes

Why OO 3736 runs late

Extreme weather accounts for 44% of the 1,794 delay minutes carriers reported here, and the remaining four split what is left.

Extreme weather
44%
Carrier
43%
National Airspace System
13%

Extreme weather accounts for 44% 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 7.3 times the usual weather exposure. The split is drawn from 1,794 delay minutes reported on OO 3736.

Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 696 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.

OO 3736 is not only a SEA to SJC flight. It also flew SJC to SEA (252 flights, 91.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 255 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.

Other routes flown as OO 3736
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SJC to SEAthin sample	252	91.7%	65 min	0.00%	A+

What to do with this

Booking OO 3736

For a booking, OO 3736 has one of the better records a US domestic flight can show: 91.0% on time and 0.00% cancelled. That is a base rate, not a promise about any single 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