Flight number record
AS 70
Alaska Airlines · Juneau to Sitka
- Route
- JNU → SIT
- Departs
- 22:16
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 70, check with Alaska Airlines.
AS 70 earns an A−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 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 17 minutes early.
Set against the rest of the country, AS 70's record is 8 points better than the US average of 77.3%. That gap is worth roughly 81 fewer late arrivals for every thousand flights.
Key figures
On time
85.4%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.89%
1 hour+ late
5.2%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. The median arrival is 17 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 70 flies
AS 70 flies JNU to SIT without a single fixed slot. Its most common scheduled departure was 22:16, used on 76 of 362 flights, with 22:18 (70 flights) and 22:13 (68 flights) next.
- Departs 22:1676 flights21.0%
- Departs 22:1870 flights19.3%
- Departs 22:1368 flights18.8%
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 22:16 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and AS 70 runs 15 points better at 85.4%. 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 70 next to JNU to SIT
Every carrier on JNU to SIT combined arrived on time 85.0% of the time across 725 flights, so AS 70 is about level with it. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 70thin sample | 362 | 85.4% | 55 min | 3.31% | A− |
| All Alaska Airlines on JNU–SIT | 725 | 85.0% | 65 min | 2.21% | A |
| All carriers on JNU–SIT | 725 | 85.0% | 65 min | 2.21% | A |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 70 quarter by quarter
AS 70 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.3% on time and its weakest Jan–Mar 2026 at 73.3%, a swing of 20 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 flights90.0%
- Oct–Dec 202589 flights85.4%
- Jan–Mar 202690 flights73.3%
- Apr–Jun 202691 flights93.3%
- Jul–Sep 202662 flights88.5%
Scale runs 65% to 100%.
By weekday, AS 70 ranged from 80.8% on Friday to 92.0% on Saturday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AS 70 runs when it is late
AS 70 often beats the schedule: 196 of 349 completed flights, 56%, arrived 15 minutes or more early. The 51 late arrivals split 15 under half an hour, 18 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early196 flights56.2%
- Within 15 min102 flights29.2%
- 15–29 min late15 flights4.3%
- 30–59 min late18 flights5.2%
- 1–2 hours late15 flights4.3%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 349 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 48 departures that left 15 minutes late or more, only 4 made it up before arrival. 7 flights left on time and still arrived late.
The worst days
Worst days for AS 70
The latest arrival of the period was on 27 February 2026, 2 hours 36 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 February 2026 | 2 hours 36 minutes | Carrier |
| 29 December 2025 | 2 hours 27 minutes | Late-arriving aircraft |
| 28 December 2025 | 2 hours 15 minutes | Extreme weather |
| 20 December 2025 | 1 hour 53 minutes | Late-arriving aircraft |
| 26 January 2026 | 1 hour 51 minutes | Late-arriving aircraft |
Delay causes
Why AS 70 runs late
Late-arriving aircraft accounts for 60% of the 2,824 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 24%Carrier
- 12%National Airspace System
- 5%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,824 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 2,824 delay minutes reported on AS 70.
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
5.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
AS 70 is not only a JNU to SIT flight. It also flew ANC to JNU (362 flights, 86.2% 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 |
|---|---|---|---|---|---|
| ANC to JNUthin sample | 362 | 86.2% | 52 min | 0.83% | A+ |
What to do with this
Booking AS 70
For a booking, the cancellation rate is the figure to plan around on AS 70: 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
- JNU to SIT, every carrier and departure
- SIT to JNU, the return direction
- Alaska Airlines 62 on the same route84.5%
- 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.