Flight number record

OO 3494

SkyWest Airlines · San Francisco to Santa Ana

Route: SFO → SNA
Departs: 15:48
Flights: 286
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3494, 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 3494 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 286 flights, with a median arrival 6 minutes early.

On time

80.6%

Arrivals under 15 minutes late, of 284 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.70%

National rate is 1.89%

1 hour+ late

8.1%

National rate is 8.3%

These figures cover 286 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When OO 3494 flies

OO 3494 flies SFO to SNA without a single fixed slot. Its most common scheduled departure was 15:48, used on 70 of 286 flights, with 17:00 (36 flights) and 16:19 (34 flights) next.

Departs 15:4870 flights24.5%
Departs 17:0036 flights12.6%
Departs 16:1934 flights11.9%

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 15:48 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 3494 runs 9 points better at 80.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

OO 3494 next to SFO to SNA

Every carrier on SFO to SNA combined arrived on time 77.4% of the time across 4,701 flights, so OO 3494 is 3 points ahead of it. SkyWest flew 3,497 flights on the same city pair under all its flight numbers, including this one, and those ran 76.9% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 2 points.

OO 3494 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3494thin sample	286	80.6%	58 min	0.70%	B+
All SkyWest Airlines on SFO–SNA	3,497	76.9%	61 min	1.69%	B
All carriers on SFO–SNA	4,701	77.4%	61 min	1.43%	B
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3494 quarter by quarter

OO 3494 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.8% on time and its weakest Jul–Sep 2026 at 67.8%, a swing of 20 points on roughly 57 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 flights86.7%
Oct–Dec 202572 flights80.6%
Jan–Mar 202682 flights87.8%
Apr–Jun 202641 flights80.5%
Jul–Sep 202661 flights67.8%

Scale runs 60% to 95%.

By weekday, OO 3494 did best on Tuesday at 87.5% on time and worst on Monday at 73.2%. Each day rests on about 41 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 3494 runs when it is late

The 55 late arrivals split 18 under half an hour, 14 between 30 and 60 minutes, and 23 an hour or more.

15+ min early67 flights23.6%
Within 15 min162 flights57.0%
15–29 min late18 flights6.3%
30–59 min late14 flights4.9%
1–2 hours late17 flights6.0%
2+ hours late6 flights2.1%

Scale runs 0% to 100%.

Share of 284 completed flights by arrival against schedule.

10 of 54 late departures made up the time and arrived on time, 19% of them. 11 flights left on time and still arrived late.

The worst days

Worst days for OO 3494

The latest arrival of the period was on 11 April 2026, 2 hours 32 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.

The latest arrivals of OO 3494 in the period
Date	Arrived late by	Largest filed cause
11 April 2026	2 hours 32 minutes	Late-arriving aircraft
5 November 2025	2 hours 26 minutes	National Airspace System
19 March 2026	2 hours 23 minutes	Late-arriving aircraft
9 September 2025	2 hours 18 minutes	Late-arriving aircraft
11 February 2026	2 hours 15 minutes	National Airspace System

Delay causes

Why OO 3494 runs late

Late-arriving aircraft accounts for 49% of the 3,172 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
49%
National Airspace System
32%
Carrier
16%
Extreme weather
2%

49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,172 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 3,172 delay minutes reported on OO 3494.

Cancellations are rare at 0.70%, below the national 1.89% 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

8.1% 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 same number turns up on two other city pairs in the data, including SNA to SFO (220) and SJC to SNA (1), but none flew often enough under OO 3494 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to SNA only.

One caution: this is a thin sample. 286 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 3494

For a booking, read OO 3494 as 80.6% on time with 0.70% cancelled over 286 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