Flight number record
AS 548
Alaska Airlines · Santa Ana to Seattle
- Route
- SNA → SEA
- Departs
- 12:05
- Flights
- 263
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 548, check with Alaska Airlines.
AS 548 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 263 flights, with a median arrival 13 minutes early.
Set against the rest of the country, AS 548's record is 12 points better than the US average of 77.3%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.
Key figures
On time
89.6%
Arrivals under 15 minutes late, of 260 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
1.14%
National rate is 1.89%
1 hour+ late
3.5%
National rate is 8.3%
These figures cover 263 flights between September 2025 and August 2026. The median arrival is 13 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 AS 548 flies
AS 548 flies SNA to SEA without a single fixed slot. Its most common scheduled departure was 12:05, used on 69 of 263 flights, with 12:33 (36 flights) and 12:07 (35 flights) next.
- Departs 12:0569 flights26.2%
- Departs 12:3336 flights13.7%
- Departs 12:0735 flights13.3%
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 12:05 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 548 runs 11 points better at 89.6%. 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
AS 548 next to SNA to SEA
Every carrier on SNA to SEA combined arrived on time 85.8% of the time across 3,944 flights, so AS 548 is 4 points ahead of it. Alaska flew 2,569 flights on the same city pair under all its flight numbers, including this one, and those ran 87.9% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 548thin sample | 263 | 89.6% | 51 min | 1.14% | A |
| All Alaska Airlines on SNA–SEA | 2,569 | 87.9% | 48 min | 1.13% | A |
| All carriers on SNA–SEA | 3,944 | 85.8% | 57 min | 1.06% | A |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 548 quarter by quarter
AS 548 did not run the same all year. Its best quarter was Jan–Mar 2026 at 96.4% on time and its weakest Jul–Sep 2026 at 80.3%, a swing of 16 points on roughly 66 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.
- Oct–Dec 202554 flights87.0%
- Jan–Mar 202685 flights96.4%
- Apr–Jun 202662 flights91.9%
- Jul–Sep 202662 flights80.3%
Scale runs 70% to 100%.
By weekday, AS 548 did best on Tuesday at 97.2% on time and worst on Thursday at 77.5%. Each day rests on about 38 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 548 runs when it is late
AS 548 often beats the schedule: 122 of 260 completed flights, 47%, arrived 15 minutes or more early. The 27 late arrivals split 11 under half an hour, 7 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early122 flights46.9%
- Within 15 min111 flights42.7%
- 15–29 min late11 flights4.2%
- 30–59 min late7 flights2.7%
- 1–2 hours late7 flights2.7%
- 2+ hours late2 flights0.8%
Scale runs 0% to 100%.
Share of 260 completed flights by arrival against schedule.
A late pushback is often recovered here: of 42 departures that left 15 minutes late or more, 24 still arrived on time. 9 flights left on time and still arrived late.
The worst days
Worst days for AS 548
The latest arrival of the period was on 24 June 2026, 2 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 June 2026 | 2 hours 48 minutes | Carrier |
| 22 July 2026 | 2 hours 8 minutes | Late-arriving aircraft |
| 26 October 2025 | 1 hour 52 minutes | Late-arriving aircraft |
| 16 July 2026 | 1 hour 47 minutes | Late-arriving aircraft |
| 16 March 2026 | 1 hour 28 minutes | Late-arriving aircraft |
Delay causes
Why AS 548 runs late
Late-arriving aircraft accounts for 60% of the 1,370 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 22%Carrier
- 15%National Airspace System
- 3%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,370 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 1,370 delay minutes reported on AS 548.
Cancellations sit at 1.14% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.5% 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 978 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 CLE to SEA (51), but none flew often enough under AS 548 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SNA to SEA only.
One caution: this is a thin sample. 263 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 AS 548
For a booking, AS 548 has one of the better records a US domestic flight can show: 89.6% on time and 1.14% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SNA to SEA, every carrier and departure
- SEA to SNA, the return direction
- Alaska Airlines 1325 on the same route93.7%
- Alaska Airlines 702 on the same route90.2%
- Alaska Airlines 760 on the same route87.5%
- John Wayne Airport (SNA) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Alaska Airlines on-time record
- Every Alaska 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 Alaska 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.