Juneau (JNU) to Seattle (SEA): On-Time Performance
Data through July 2026
The calendar drives reliability on JNU–SEA. March 2025 flights landed on schedule 91% of the time, but March 2026 dropped to 69% — a gap of 22 points. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 1.6%
- Flights/day
- 4.4
- last 12 months
- Duration
- 2h 27m
- scheduled
- Distance
- 909 mi
Best airline from JNU to SEA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 93% | 9 min | 0.3% | 322 |
| Alaska Airlines | 80% | 13 min | 1.7% | 3,064 |
Monthly on-time trend
Best time to fly from JNU to SEA
Aim for departures around 7 p.m. (94% on-time); avoid 1 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 11 min |
| Tuesday | 82% | 11 min |
| Wednesday | 78% | 11 min |
| Thursday | 81% | 14 min |
| Friday | 81% | 14 min |
| Saturday | 81% | 13 min |
| Sundaybest | 82% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations41%
- National airspace system19%
- Weather6%
- Security1%
Frequently asked questions
- How often are flights from JNU to SEA delayed?
- 19% of JNU–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from JNU to SEA?
- Delta Air Lines has the best on-time record on this route at 93%, based on 322 flights. 2 airlines flew JNU–SEA frequently enough to compare in this period.
- What is the best time of day to fly from JNU to SEA?
- Departures around 7 p.m. have the best record (94% on-time), while departures around 1 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from JNU to SEA?
- The scheduled JNU–SEA flight time averages 2h 27m over 909 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are JNU to SEA flights cancelled?
- 1.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from JNU to SEA?
- March 2026 was the roughest month in this dataset, with only 69% of arrivals on time. The best was March 2025 at 91%. If your dates are flexible, that 22-point gap is worth planning around.
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Based on 3,386 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.