Flight number record
AS 758
Alaska Airlines · San Francisco to Seattle
- Route
- SFO → SEA
- Departs
- 17:38
- Flights
- 297
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 758, check with Alaska Airlines.
AS 758 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about 45 minutes behind schedule. Build slack into anything you connect to. That rests on 297 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so AS 758 runs 10 points behind the country as a whole. Across a thousand flights that is about 101 extra late arrivals.
Key figures
On time
67.2%
Arrivals under 15 minutes late, of 296 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.34%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 297 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Schedule
When AS 758 flies
AS 758 flies SFO to SEA without a single fixed slot. Its most common scheduled departure was 17:38, used on 69 of 297 flights, with 18:18 (51 flights) and 18:14 (35 flights) next.
- Departs 17:3869 flights23.2%
- Departs 18:1851 flights17.2%
- Departs 18:1435 flights11.8%
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 17:38 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and AS 758 runs level with that at 67.2%. 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
AS 758 next to SFO to SEA
Every carrier on SFO to SEA combined arrived on time 72.3% of the time across 6,821 flights, so AS 758 is 5 points behind it. Alaska flew 2,729 flights on the same city pair under all its flight numbers, including this one, and those ran 68.8% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 758thin sample | 297 | 67.2% | 46 min | 0.34% | C+ |
| All Alaska Airlines on SFO–SEA | 2,729 | 68.8% | 54 min | 1.28% | C |
| All carriers on SFO–SEA | 6,821 | 72.3% | 56 min | 1.08% | C |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 758 quarter by quarter
AS 758 did not run the same all year. Its best quarter was Jan–Mar 2026 at 84.3% on time and its weakest Jul–Sep 2026 at 49.2%, a swing of 35 points on roughly 74 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 202555 flights72.7%
- Jan–Mar 202690 flights84.3%
- Apr–Jun 202691 flights59.3%
- Jul–Sep 202661 flights49.2%
Scale runs 40% to 90%.
By weekday, AS 758 did best on Tuesday at 85.0% on time and worst on Thursday at 55.8%. Each day rests on about 42 flights, so a gap of 29 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 758 runs when it is late
Most of the lateness is short. 53 of the 97 late arrivals were under half an hour behind, and 13 reached an hour or more.
- 15+ min early58 flights19.6%
- Within 15 min141 flights47.6%
- 15–29 min late53 flights17.9%
- 30–59 min late31 flights10.5%
- 1–2 hours late7 flights2.4%
- 2+ hours late6 flights2.0%
Scale runs 0% to 100%.
Share of 296 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 84 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 22 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 SEA.
The worst days
Worst days for AS 758
The latest arrival of the period was on 27 April 2026, 5 hours 15 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 April 2026 | 5 hours 15 minutes | Late-arriving aircraft |
| 26 December 2025 | 4 hours 26 minutes | Late-arriving aircraft |
| 11 March 2026 | 3 hours 40 minutes | National Airspace System |
| 29 March 2026 | 3 hours 36 minutes | Carrier |
| 17 March 2026 | 3 hours 35 minutes | Carrier |
Delay causes
Why AS 758 runs late
Late-arriving aircraft accounts for 52% of the 4,431 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Late-arriving aircraft
- 25%National Airspace System
- 22%Carrier
- 2%Extreme weather
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,431 reported delay minutes here, that single category outweighs weather by 30 to one. The split is drawn from 4,431 delay minutes reported on AS 758.
Cancellations are rare at 0.34%, 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
Badly late arrivals are rare here: only 4.4% 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 679 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.
Every one of the 297 flights under AS 758 in the data flew SFO to SEA. 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. 297 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 758
For a booking, AS 758 is one of the weaker ways to fly SFO to SEA: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- SFO to SEA, every carrier and departure
- SEA to SFO, the return direction
- Delta Air Lines 2721 on the same route95.3%
- Delta Air Lines 1412 on the same route74.1%
- SkyWest Airlines 3707 on the same route65.1%
- SkyWest Airlines 3991 on the same route64.3%
- United Airlines 2279 on the same route75.7%
- Alaska Airlines 1327 on the same route67.9%
- San Francisco International (SFO) 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.