Flight number record
OO 3343
SkyWest Airlines · Seattle to Fresno
- Route
- SEA → FAT
- Departs
- 19:50
- Flights
- 342
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 342 flights, with a median arrival 5 minutes early.
Set against the rest of the country, OO 3343's record is 5 points better than the US average of 77.3%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.
Key figures
On time
82.2%
Arrivals under 15 minutes late, of 338 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
1.17%
National rate is 1.89%
1 hour+ late
5.3%
National rate is 8.3%
These figures cover 342 flights between September 2025 and August 2026. The median arrival is 5 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 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 342 flights, with 20:25 (69 flights) and 19:55 (54 flights) next.
- Departs 19:50107 flights31.3%
- Departs 20:2569 flights20.2%
- Departs 19:5554 flights15.8%
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 19:50 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3343 runs 14 points better at 82.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 3343 next to SEA to FAT
Every carrier on SEA to FAT combined arrived on time 82.3% of the time across 882 flights, so OO 3343 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3343thin sample | 342 | 82.2% | 63 min | 1.17% | B |
| All SkyWest Airlines on SEA–FAT | 465 | 83.5% | 61 min | 0.86% | B+ |
| All carriers on SEA–FAT | 882 | 82.3% | 55 min | 0.79% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 68 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 flights90.0%
- Oct–Dec 202569 flights75.4%
- Jan–Mar 202690 flights79.1%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202662 flights77.4%
Scale runs 65% to 95%.
By weekday, OO 3343 ranged from 79.6% on Sunday to 87.5% on Thursday. With about 49 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 3343 runs when it is late
OO 3343 often beats the schedule: 92 of 338 completed flights, 27%, arrived 15 minutes or more early. The 60 late arrivals split 21 under half an hour, 21 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early92 flights27.2%
- Within 15 min186 flights55.0%
- 15–29 min late21 flights6.2%
- 30–59 min late21 flights6.2%
- 1–2 hours late8 flights2.4%
- 2+ hours late10 flights3.0%
Scale runs 0% to 100%.
Share of 338 completed flights by arrival against schedule.
11 of 62 late departures made up the time and arrived on time, 18% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for OO 3343
The latest arrival of the period was on 28 July 2026, 3 hours 35 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 July 2026 | 3 hours 35 minutes | Late-arriving aircraft |
| 7 August 2026 | 3 hours 28 minutes | Late-arriving aircraft |
| 15 March 2026 | 3 hours 3 minutes | Late-arriving aircraft |
| 31 December 2025 | 3 hours 2 minutes | Extreme weather |
| 3 March 2026 | 2 hours 36 minutes | National Airspace System |
Delay causes
Why OO 3343 runs late
Late-arriving aircraft accounts for 49% of the 3,773 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 19%Carrier
- 19%National Airspace System
- 12%Extreme weather
Extreme weather accounts for 12% 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 2.1 times the usual weather exposure. The split is drawn from 3,773 delay minutes reported on OO 3343.
Cancellations sit at 1.17% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.3% of arrivals land an hour or more late, close to the national 8.3%, so 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.
The same number turns up on one other city pair in the data, including SAN to SFO (12), 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. 342 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 82.2% on time with 1.17% cancelled over 342 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to FAT, every carrier and departure
- FAT to SEA, the return direction
- Seattle-Tacoma International (SEA) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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 ; recomputed monthly. How this data is collected.