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Route Reliability

Seattle → Juneau

SEA–JNU · 909 miles · Seattle–Tacoma International Airport to Juneau International Airport

76
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
5 min
Average arrival delay
1.4%
Cancelled
1,582
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines78%140 flights
  2. 2.Alaska Airlines75%1,442 flights

What the data says

The 12–3 PM departure wins.

SEA–JNU flights departing between 12–3 PM arrived on time 87% of the time, versus 67% between 6–9 PM.

Skip Thursday if you can.

SEA–JNU flights arrived on time 81% of the time on Tuesdays. On Thursdays: 70%.

Delta Air Lines has a slight edge here.

Delta Air Lines arrived on time 78% of the time on this route; Alaska Airlines managed 75%.

Trending in the right direction.

SEA–JNU flights arrived on time 84% of the time over the last three months in the data, compared with 74% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon77%(223 flights)
  • Tue81%(221 flights)
  • Wed78%(225 flights)
  • Thu70%(221 flights)
  • Fri74%(222 flights)
  • Sat76%(220 flights)
  • Sun72%(221 flights)
On-time by departure window
  • 6–9 AM84%(357 flights)
  • 9 AM–12 PM72%(471 flights)
  • 12–3 PM87%(126 flights)
  • 3–6 PM78%(139 flights)
  • 6–9 PM67%(217 flights)
  • 9 PM–12 AM70%(243 flights)
On-time trend by month
82%
May

Jun 63% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%191
July 202562%213
August 202573%203
September 202587%177
October 202583%120
November 202583%87
December 202566%86
January 202676%84
February 202681%82
March 202678%91
April 202692%88
May 202682%131

Keep nerding

Based on 1,582 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.