Flight number record

OO 5937

SkyWest Airlines · San Francisco to Santa Ana

Route: SFO → SNA
Departs: 07:15
Flights: 278
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5937, 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 5937 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 278 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 5937's record is 11 points better than the US average of 77.6%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.

On time

88.8%

Arrivals under 15 minutes late, of 277 completed flights

Avg delay

91 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

5.4%

National rate is 8.1%

These figures cover 278 flights between July 2025 and June 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.

Schedule

When OO 5937 flies

OO 5937 flies SFO to SNA without a single fixed slot. Its most common scheduled departure was 07:15, used on 117 of 278 flights, with 07:20 (47 flights) and 08:25 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:15117 flights42.1%
Departs 07:2047 flights16.9%
Departs 08:2531 flights11.2%

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 07:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5937 runs level with that at 88.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5937 next to SFO to SNA

Every carrier on SFO to SNA combined arrived on time 80.3% of the time across 4,726 flights, so OO 5937 is 9 points ahead of it. SkyWest flew 3,521 flights on the same city pair under all its flight numbers, including this one, and those ran 79.4% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 10 points.

OO 5937 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5937thin sample	278	88.8%	91 min	0.00%	A+
All SkyWest Airlines on SFO–SNA	3,521	79.4%	60 min	1.42%	B
All carriers on SFO–SNA	4,726	80.3%	60 min	1.18%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5937 quarter by quarter

Quarter by quarter OO 5937 held fairly steady: 91.3% in Jul–Sep 2025, 87.0% in Oct–Dec 2025, 91.5% in Jan–Mar 2026 and 81.6% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights91.3%
Oct–Dec 202555 flights87.0%
Jan–Mar 202682 flights91.5%
Apr–Jun 202649 flights81.6%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5937 did best on Saturday at 94.6% on time and worst on Monday at 82.5%. Each day rests on about 40 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5937 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 49% of the 2,831 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
49%
Carrier
44%
National Airspace System
6%

49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,831 reported delay minutes here, that single category outweighs weather by 49 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,831 delay minutes reported on OO 5937.

Cancellations are rare at 0.00%, below the national 1.81% 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

5.4% 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 an hour and a half, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including ORD to MLI (36) and MTJ to ORD (30), but none flew often enough under OO 5937 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. 278 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 5937

For a booking, OO 5937 has one of the better records a US domestic flight can show: 88.8% 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures