PlainFlights

Route · SEA → JNU · 2020–2025 BTS data

Seattle to Juneau

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to JNU (Seattle to Juneau) ranks #1396 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.7%
On-time
-0.3 pts
vs US avg
51 min
Delay when late
8,680
Flights
#1396 of 4927
Corpus placement

Cancelled

1.2%

Best Month

Mar 2025 88%

Worst Month

Jul 2024 58%

Distance

909 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 30 4 0 AS
Nov 2025 87 15 0 0 AS
Oct 2025 123 22 3 0 AS,DL
Sep 2025 180 23 3 0 DL,AS
Aug 2025 204 54 1 0 AS,DL
Jul 2025 217 84 4 0 AS,DL
Jun 2025 192 71 1 0 AS,DL
May 2025 127 42 1 0 AS
Apr 2025 90 23 0 0 AS
Mar 2025 93 11 0 3 AS
Feb 2025 84 15 2 0 AS
Jan 2025 92 24 3 0 AS
Dec 2024 92 23 1 0 AS
Nov 2024 92 17 3 1 AS,DL
Oct 2024 123 21 3 1 AS,DL
Sep 2024 168 39 2 0 AS,DL
Aug 2024 211 70 1 0 AS,DL
Jul 2024 217 91 2 1 AS,DL
Jun 2024 192 62 0 1 AS,DL
May 2024 140 52 2 0 AS
Apr 2024 105 24 0 0 AS
Mar 2024 93 25 1 1 AS
Feb 2024 87 12 1 1 AS
Jan 2024 92 29 1 1 AS

SEA–JNU seasonal on-time pattern

Best: October (86.7%) · weakest: December (72.0%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 72%

Strongest calendar month

October

86.7% on-time · ~110 flights/mo

Busiest calendar month

August

~193 flights/mo avg

Weakest calendar month

December

72.0% on-time · ~88 flights/mo

Cancellation Rate

1.2%

39 of 3,191 flights

Diversion Rate

0.3%

10 of 3,191 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

JNU - Juneau

Full on-time, delay-cause, and seasonal performance for Juneau, AK.

JNU on-time profile

Compare the two airports

See SEA and JNU side by side on delays, cancellations, and reliability.

Compare SEA vs JNU

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Juneau · fleet on-time rank #3618 of 4927.

What the Data Says About SEA to JNU

8,680 tracked flights put the SEA to JNU pairing (Seattle to Juneau) at a 78.7% on-time rate, squarely in line with the wider network. Delays that do occur run 51.4 minutes on average. Across the 909-mile route and its 3 carriers, the trailing 24 months show 1.2% cancelled and 0.3% diverted (3,191 flights sampled).

The monthly split is wide on this route: Mar 2025 posted the strongest performance at 88% on-time, while Jul 2024 came in at just 58% - a 30-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–JNU peaks in October at 86.7% on-time while August carries the heaviest traffic (~193 flights per month) ; the softest month is December at 72.0%, a 14.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to JNU rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to JNU ranks #1396 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to JNU? ▼
Flights from Seattle to Juneau have a 78.7% on-time rate based on 8,680 flights. The average delay is 51.4 minutes. The best recent month was Mar 2025 with 88% on-time.
What is the cancellation rate for SEA to JNU? ▼
Over the last 24 months, 1.2% of flights on this route were cancelled (39 of 3,191 flights) and 0.3% were diverted.
How far is the flight from SEA to JNU? ▼
The flight distance from Seattle (SEA) to Juneau (JNU) is approximately 909 miles. This route is served by 3 carriers.
When is the best time to fly from SEA to JNU? ▼
The best recent month for on-time performance was Mar 2025 (88% on-time). The worst was Jul 2024 (58% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
JNU Airport

Juneau
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–JNU data

SEA–JNU is mid-pack at 78.7% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and JNU airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, October (86.7% on-time) beats December (72.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.7% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.