Route reliability record
JNU→ANC
Juneau to Anchorage
- Flights
- 1,230
- Period
- September 2025 to August 2026
- Distance
- 571 mi
- Carriers
- 1
This route earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 1,230 JNU to ANC flights, with a median arrival 11 minutes early.
Best time to fly JNU to ANC: a 5pm–8pm departure, ideally on a Saturday. Flights in that window arrived on time 91.1% of the time and Saturday flights 88.2%, against 84.2% for the route overall.
Set against the rest of the country, this route's record is 7 points better than the US average of 77.3%. That gap is worth roughly 69 fewer late arrivals for every thousand flights.
Key figures
On time
84.2%
Arrivals under 15 minutes late, of 1,194 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
2.76%
National rate is 1.89%
Best carrier
Alaska
84.2% on time across 1,230 flights
These figures cover 1,230 flights between September 2025 and August 2026. The median arrival is 11 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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Carrier by carrier
Which airline is most reliable on JNU to ANC
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Alaska Airlines | 1,230 | 84.2% | 71 min | 2.76% | B |
Flight by flight
Flights on JNU to ANC
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 10 points, against half a point between the best and worst carrier.
- 5am–8am362 flights86.6%
- 8am–11am—
- 11am–2pm362 flights81.5%
- 2pm–5pm21 flights—
- 5pm–8pm123 flights91.1%
- 8pm–5am362 flights81.0%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 91.1% on time. The full set of windows spans 10 points.
Explore
Filter JNU to ANC by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On JNU to ANC, the best departure window is 5pm–8pm at 91.1% on time and the worst is 8pm–5am at 81.0%, a wide gap of 10.1 points. All US flights leaving 5pm–8pm ran 68.0%.
- 5–8am86.6%
- 8–11am—
- 11am–2pm81.5%
- 2–5pm—
- 5–8pm91.1%
- 8pm–5am81.0%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 33 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 62.0% on time, against 94.5% in May. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. August was the busiest month here, with 124 flights.
Across the week, Saturday is the strongest day at 88.2% on time and Monday the weakest at 79.0%, a spread of 9 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 64% of the 13,000 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Late-arriving aircraft
- 17%Carrier
- 12%National Airspace System
- 7%Extreme weather
- 0%Security
64% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 13,000 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 13,482 reported delay minutes.
Cancellations run at 2.76%, against 1.89% nationally. That is roughly one flight in 40 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 stage length
What a delay here actually costs
6.1% 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 a little over an hour, which a normal layover absorbs.
The 571 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.
The return leg is a different operation and performs like one: it runs 87.4% on time across 1,230 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
The sample behind these figures is 1,230 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in ANC after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 94.5% on time and December 62.0%, a swing of 33 points. If the dates move at all, move them out of December before you think about anything else. 1,194 completed flights over 12 months sit behind that.
Common questions
JNU to ANC questions
How often is JNU to ANC delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 15.8% of the 1,230 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is JNU to ANC compared with the rest of the country?
84.2% of flights arrive on time here against a national 77.3%, a difference of 7 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on JNU to ANC?
The 5pm–8pm departure window is the strongest at 91.1% on time. The 8pm–5am window is the weakest at 81.0%, 10 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on JNU to ANC?
December is the weakest month at 62.0% on time, compared with 94.5% in May. Across the year that is 33 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ANC to JNU — the return legseparate record
- JNU to SEA, a related route81.4%
- SEA to ANC, a related route76.5%
- JNU to SIT, a related route85.0%
- Alaska Airlines on-time record84.2%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. JNU to ANC and ANC to JNU are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.