Flight number record
AS 70
Alaska Airlines · Juneau to Sitka
- Route
- JNU → SIT
- Departs
- 22:15
- Flights
- 362
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AS 70, check with Alaska Airlines.
AS 70 lands a B−, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 362 flights, with a median arrival 16 minutes early.
Set against the rest of the country, AS 70's record is 6 points better than the US average of 77.6%. That gap is worth roughly 61 fewer late arrivals for every thousand flights.
Key figures
On time
83.7%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
3.04%
National rate is 1.81%
1 hour+ late
6.3%
National rate is 8.1%
These figures cover 362 flights between July 2025 and June 2026. The median arrival is 16 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.
Schedule
When AS 70 flies
AS 70 flies JNU to SIT without a single fixed slot. Its most common scheduled departure was 22:15, used on 98 of 362 flights, with 22:13 (68 flights) and 22:16 (63 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 22:1598 flights27.1%
- Departs 22:1368 flights18.8%
- Departs 22:1663 flights17.4%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 22:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and AS 70 runs 13 points better at 83.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
AS 70 next to JNU to SIT
Every carrier on JNU to SIT combined arrived on time 84.0% of the time across 725 flights, so AS 70 is about level with it. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 70thin sample | 362 | 83.7% | 58 min | 3.04% | B− |
| All Alaska Airlines on JNU–SIT | 725 | 84.0% | 66 min | 2.07% | B |
| All carriers on JNU–SIT | 725 | 84.0% | 66 min | 2.07% | B |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | 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 91 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 202592 flights82.6%
- Oct–Dec 202589 flights85.4%
- Jan–Mar 202690 flights73.3%
- Apr–Jun 202691 flights93.3%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 70 did best on Tuesday at 94.0% on time and worst on Thursday at 75.0%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Delay causes
Why AS 70 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 60% of the 3,330 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 60%Late-arriving aircraft
- 26%Carrier
- 9%National Airspace System
- 4%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,330 reported delay minutes here, that single category outweighs weather by 15 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,330 delay minutes reported on AS 70.
Cancellations run at 3.04%, against 1.81% nationally. That is roughly 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
6.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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, 85.1% 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 | 85.1% | 56 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: 3.04% 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 route84.2%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.