SEA to JNU flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Juneau International Airport · 909 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or JNU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Juneau (JNU) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.1% were cancelled, and 5% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (83% on time); Alaska Airlines was the least (79%).
- Departures scheduled around 8pm did best (86% on time); around 7pm did worst (61%).
- Wednesday was the most reliable day to fly (86% on time) and Thursday the least (71%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (50%).
Which airline is most on time from SEA to JNU?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 83% | 0.7% | 9 min | 5.7% | 141 |
| Alaska Airlines | 79% | 1.2% | 12 min | 4.9% | 1,447 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am86%362 flights
- 9am80%116 flights
- 10am79%28 flights
- 11am75%334 flights
- 1pm85%121 flights
- 3pm84%20 flights
- 4pm83%121 flights
- 7pm61%127 flights
- 8pm86%106 flights
- 9pm79%140 flights
- 10pm67%49 flights
- 11pm78%64 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%0.0% cancelled
- Tuesday83%1.8% cancelled
- Wednesday86%0.9% cancelled
- Thursday71%0.9% cancelled
- Friday80%0.9% cancelled
- Saturday77%1.3% cancelled
- Sunday78%2.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)50%
- Late-arriving aircraft30%
- Air traffic control & airport congestion14%
- Extreme weather7%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather56%
- Airline (crew, maintenance, cleaning, fueling)44%
- Air traffic control & airport congestion0%
- Security0%
SEA to JNU: common questions
- How often are SEA to JNU flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Juneau cancelled?
- 1.1% of scheduled flights were cancelled (18 of 1,588).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 50 min behind schedule on average, and 5.0% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: JNU to SEA — 81% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → JNU, nonstop flights by US airlines that report to the DOT. How we calculate this.