Flight number record
AS 1493
Alaska Airlines · San Diego to Chicago
- Route
- SAN → ORD
- Departs
- 17:23
- Flights
- 257
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 1493, check with Alaska Airlines.
AS 1493 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 257 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.3%, so AS 1493 runs 9 points behind the country as a whole. Across a thousand flights that is about 90 extra late arrivals.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 246 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
2.33%
National rate is 1.89%
1 hour+ late
13.8%
National rate is 8.3%
These figures cover 257 flights between September 2025 and August 2026. Beyond the headline rate, 13.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AS 1493 flies
AS 1493 flies SAN to ORD without a single fixed slot. Its most common scheduled departure was 17:23, used on 60 of 257 flights, with 17:10 (36 flights) and 17:42 (34 flights) next.
- Departs 17:2360 flights23.3%
- Departs 17:1036 flights14.0%
- Departs 17:4234 flights13.2%
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 17:23 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and AS 1493 runs level with that at 68.3%. 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
AS 1493 next to SAN to ORD
Every carrier on SAN to ORD combined arrived on time 77.6% of the time across 3,944 flights, so AS 1493 is 9 points behind it. Alaska flew 862 flights on the same city pair under all its flight numbers, including this one, and those ran 69.7% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 1493thin sample | 257 | 68.3% | 67 min | 2.33% | C |
| All Alaska Airlines on SAN–ORD | 862 | 69.7% | 61 min | 2.55% | C |
| All carriers on SAN–ORD | 3,944 | 77.6% | 79 min | 1.34% | B |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 1493 quarter by quarter
AS 1493 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.8% on time and its weakest Jul–Sep 2026 at 56.5%, a swing of 27 points on roughly 64 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 202563 flights66.1%
- Jan–Mar 202682 flights83.8%
- Apr–Jun 202662 flights59.0%
- Jul–Sep 202650 flights56.5%
Scale runs 50% to 90%.
By weekday, AS 1493 did best on Friday at 71.4% on time and worst on Monday at 58.1%. Each day rests on about 37 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 1493 runs when it is late
AS 1493 often beats the schedule: 91 of 246 completed flights, 37%, arrived 15 minutes or more early. The 78 late arrivals split 26 under half an hour, 18 between 30 and 60 minutes, and 34 an hour or more.
- 15+ min early91 flights37.0%
- Within 15 min77 flights31.3%
- 15–29 min late26 flights10.6%
- 30–59 min late18 flights7.3%
- 1–2 hours late24 flights9.8%
- 2+ hours late10 flights4.1%
Scale runs 0% to 100%.
Share of 246 completed flights by arrival against schedule.
26 of 87 late departures made up the time and arrived on time, 30% of them. In the other direction, 17 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for AS 1493
The latest arrival of the period was on 15 January 2026, 5 hours 1 minute behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in June 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 January 2026 | 5 hours 1 minute | Late-arriving aircraft |
| 10 June 2026 | 4 hours 36 minutes | National Airspace System |
| 8 June 2026 | 4 hours 2 minutes | National Airspace System |
| 12 June 2026 | 3 hours 56 minutes | Late-arriving aircraft |
| 17 April 2026 | 2 hours 43 minutes | National Airspace System |
Delay causes
Why AS 1493 runs late
National Airspace System accounts for 46% of the 5,199 delay minutes carriers reported here, and the remaining four split what is left.
- 46%National Airspace System
- 33%Late-arriving aircraft
- 19%Carrier
- 2%Extreme weather
46% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,397 minutes out of 5,199, against a national NAS share of 21%. The split is drawn from 5,199 delay minutes reported on AS 1493.
Cancellations sit at 2.33% against a national 1.89%, which is ordinary. Diversions add another 1.95%.
Connections and routes
What a delay on this flight costs
13.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,723 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 257 flights under AS 1493 in the data flew SAN to ORD. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 257 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 1493
For a booking, AS 1493 is a flight to put a long connection behind. 13.8% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- SAN to ORD, every carrier and departure
- ORD to SAN, the return direction
- United Airlines 1779 on the same route64.9%
- United Airlines 2486 on the same route78.5%
- San Diego International (SAN) delay statistics
- Chicago O'Hare International (ORD) 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.