Flight number record
AS 48
Alaska Airlines · Anchorage to Seattle
- Route
- ANC → SEA
- Departs
- 08:00
- Flights
- 311
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 48, check with Alaska Airlines.
AS 48 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 311 flights, with a median arrival 13 minutes early.
Set against the rest of the country, AS 48'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 308 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
0.96%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 311 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 48 flies
AS 48 flies ANC to SEA without a single fixed slot. Its most common scheduled departure was 08:00, used on 116 of 311 flights, with 10:00 (59 flights) next.
- Departs 08:00116 flights37.3%
- Departs 10:0059 flights19.0%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 48 runs 6 points better at 89.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 48 next to ANC to SEA
Every carrier on ANC to SEA combined arrived on time 86.9% of the time across 6,616 flights, so AS 48 is 3 points ahead of it. Alaska flew 4,997 flights on the same city pair under all its flight numbers, including this one, and those ran 86.4% 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 48thin sample | 311 | 89.6% | 50 min | 0.96% | A+ |
| All Alaska Airlines on ANC–SEA | 4,997 | 86.4% | 54 min | 0.90% | A+ |
| All carriers on ANC–SEA | 6,616 | 86.9% | 64 min | 0.85% | A+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 48 quarter by quarter
AS 48 did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.2% on time and its weakest Jan–Mar 2026 at 80.5%, a swing of 13 points on roughly 78 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 202528 flights—
- Oct–Dec 202573 flights93.2%
- Jan–Mar 202679 flights80.5%
- Apr–Jun 202669 flights91.3%
- Jul–Sep 202662 flights90.2%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 48 ranged from 84.4% on Tuesday to 91.7% on Wednesday. With about 44 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AS 48 runs when it is late
AS 48 often beats the schedule: 134 of 308 completed flights, 44%, arrived 15 minutes or more early. The 32 late arrivals split 14 under half an hour, 11 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early134 flights43.5%
- Within 15 min142 flights46.1%
- 15–29 min late14 flights4.5%
- 30–59 min late11 flights3.6%
- 1–2 hours late5 flights1.6%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 308 completed flights by arrival against schedule.
4 of 28 late departures made up the time and arrived on time, 14% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for AS 48
The latest arrival of the period was on 11 January 2026, 4 hours 31 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 January 2026 | 4 hours 31 minutes | Extreme weather |
| 22 January 2026 | 2 hours 40 minutes | Carrier |
| 2 March 2026 | 1 hour 49 minutes | Carrier |
| 27 January 2026 | 1 hour 47 minutes | Extreme weather |
| 15 August 2026 | 1 hour 8 minutes | Carrier |
Delay causes
Why AS 48 runs late
Carrier accounts for 54% of the 1,601 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 30%Extreme weather
- 14%National Airspace System
- 2%Late-arriving aircraft
Extreme weather accounts for 30% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 4.9 times the usual weather exposure. The split is drawn from 1,601 delay minutes reported on AS 48.
Cancellations sit at 0.96% 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 2.3% 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 1,448 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 311 flights under AS 48 in the data flew ANC 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. 311 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 48
For a booking, AS 48 has one of the better records a US domestic flight can show: 89.6% on time and 0.96% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ANC to SEA, every carrier and departure
- SEA to ANC, the return direction
- Delta Air Lines 853 on the same route89.0%
- Delta Air Lines 922 on the same route86.9%
- Delta Air Lines 925 on the same route90.9%
- Alaska Airlines 47 on the same route80.5%
- Alaska Airlines 82 on the same route87.8%
- Alaska Airlines 54 on the same route87.5%
- 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
- Worst months to fly in the US, ranked by the data
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.