Flight number record
AS 73
Alaska Airlines · Sitka to Juneau
- Route
- SIT → JNU
- Departs
- 06:00
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 73, check with Alaska Airlines.
AS 73 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 362 flights, with a median arrival 13 minutes early.
Set against the rest of the country, AS 73's record is 13 points better than the US average of 77.3%. That gap is worth roughly 129 fewer late arrivals for every thousand flights.
Key figures
On time
90.2%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.89%
1 hour+ late
3.7%
National rate is 8.3%
These figures cover 362 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 73 flies
AS 73 flies SIT to JNU without a single fixed slot. Its most common scheduled departure was 06:00, used on 289 of 362 flights, with 06:03 (73 flights) next.
- Departs 06:00289 flights79.8%
- Departs 06:0373 flights20.2%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 73 runs level with that at 90.2%. 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 73 next to SIT to JNU
Every carrier on SIT to JNU combined arrived on time 84.9% of the time across 725 flights, so AS 73 is 5 points ahead of it. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 73thin sample | 362 | 90.2% | 60 min | 3.31% | A− |
| All Alaska Airlines on SIT–JNU | 725 | 84.9% | 62 min | 3.86% | B− |
| All carriers on SIT–JNU | 725 | 84.9% | 62 min | 3.86% | B− |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 73 quarter by quarter
AS 73 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 80.2%, a swing of 17 points on roughly 72 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 202530 flights96.7%
- Oct–Dec 202590 flights90.6%
- Jan–Mar 202689 flights80.2%
- Apr–Jun 202691 flights94.3%
- Jul–Sep 202662 flights95.0%
Scale runs 70% to 100%.
By weekday, AS 73 did best on Thursday at 97.9% on time and worst on Sunday at 85.7%. Each day rests on about 52 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 73 runs when it is late
AS 73 often beats the schedule: 148 of 348 completed flights, 43%, arrived 15 minutes or more early. The 34 late arrivals split 14 under half an hour, 7 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early148 flights42.5%
- Within 15 min166 flights47.7%
- 15–29 min late14 flights4.0%
- 30–59 min late7 flights2.0%
- 1–2 hours late10 flights2.9%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
3 of 22 late departures made up the time and arrived on time, 14% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for AS 73
The latest arrival of the period was on 17 June 2026, 4 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 June 2026 | 4 hours 47 minutes | Carrier |
| 19 October 2025 | 3 hours 50 minutes | Carrier |
| 19 January 2026 | 2 hours 17 minutes | Extreme weather |
| 29 December 2025 | 1 hour 55 minutes | Extreme weather |
| 3 February 2026 | 1 hour 33 minutes | Carrier |
Delay causes
Why AS 73 runs late
Carrier accounts for 46% of the 2,039 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 28%Extreme weather
- 26%National Airspace System
Extreme weather accounts for 28% 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 4.6 times the usual weather exposure. The split is drawn from 2,039 delay minutes reported on AS 73.
Cancellations run at 3.31%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.7% 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.
AS 73 is not only a SIT to JNU flight. It also flew JNU to ANC (362 flights, 86.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 362 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JNU to ANCthin sample | 362 | 86.6% | 70 min | 3.04% | A− |
What to do with this
Booking AS 73
For a booking, the cancellation rate is the figure to plan around on AS 73: 3.31% of its 362 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- SIT to JNU, every carrier and departure
- JNU to SIT, the return direction
- Alaska Airlines 67 on the same route79.5%
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
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.