Flight number record

OO 3343

SkyWest Airlines · Seattle to Fresno

Route: SEA → FAT
Departs: 19:50
Flights: 292
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3343, 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 3343 lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 292 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 3343's record is 6 points better than the US average of 77.6%. That gap is worth roughly 61 fewer late arrivals for every thousand flights.

On time

83.7%

Arrivals under 15 minutes late, of 288 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

5.2%

National rate is 8.1%

These figures cover 292 flights between July 2025 and June 2026. The median arrival is 7 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.

Schedule

When OO 3343 flies

OO 3343 flies SEA to FAT without a single fixed slot. Its most common scheduled departure was 19:50, used on 107 of 292 flights, with 19:55 (66 flights) and 19:54 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:50107 flights36.6%
Departs 19:5566 flights22.6%
Departs 19:5436 flights12.3%

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 19:50 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3343 runs 16 points better at 83.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 3343 next to SEA to FAT

Every carrier on SEA to FAT combined arrived on time 82.8% of the time across 965 flights, so OO 3343 is about level with it. SkyWest flew 588 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 5 points.

OO 3343 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3343thin sample	292	83.7%	62 min	1.37%	B
All SkyWest Airlines on SEA–FAT	588	83.6%	51 min	0.68%	B+
All carriers on SEA–FAT	965	82.8%	50 min	0.93%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3343 quarter by quarter

OO 3343 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.2% on time and its weakest Oct–Dec 2025 at 75.4%, a swing of 16 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 202542 flights90.5%
Oct–Dec 202569 flights75.4%
Jan–Mar 202690 flights79.1%
Apr–Jun 202691 flights91.2%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3343 ranged from 78.6% on Sunday to 90.2% on Thursday. With about 42 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 3343 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 48% of the 2,904 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.

Late-arriving aircraft
48%
National Airspace System
20%
Carrier
18%
Extreme weather
15%

Extreme weather accounts for 15% 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 2.3 times the usual weather exposure. The split is drawn from 2,904 delay minutes reported on OO 3343.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 748 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 SAN to SFO (54), but none flew often enough under OO 3343 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to FAT only.

One caution: this is a thin sample. 292 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 3343

For a booking, read OO 3343 as 83.7% on time with 1.37% cancelled over 292 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