Anchorage (ANC) to Seattle (SEA): On-Time Performance
Data through July 2026
When you fly ANC to SEA matters as much as anything else about the booking: the route swung from 95% on-time in April 2026 to just 75% in July 2024. Across the full period the route averages 85% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 79%), which matters most in the rough months.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 18
- last 12 months
- Duration
- 3h 34m
- scheduled
- Distance
- 1,448 mi
Best airline from ANC to SEA
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 90% | 11 min | 0.5% | 3,413 |
| Alaska Airlines | 84% | 9 min | 1.0% | 11,084 |
| Hawaiian Airlines | 31% | 53 min | 1.9% | 162 |
Monthly on-time trend
Best time to fly from ANC to SEA
Aim for departures around 11 p.m. (91% on-time); avoid 4 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 11 min |
| Tuesday | 84% | 10 min |
| Wednesdaybest | 87% | 7 min |
| Thursday | 85% | 10 min |
| Friday | 86% | 10 min |
| Saturday | 84% | 10 min |
| Sunday | 86% | 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 aircraft33%
- Airline operations45%
- National airspace system16%
- Weather6%
Frequently asked questions
- How often are flights from ANC to SEA delayed?
- 15% of ANC–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 10 minutes.
- Which airline is most reliable from ANC to SEA?
- Delta Air Lines has the best on-time record on this route at 90%, based on 3,413 flights. 3 airlines flew ANC–SEA frequently enough to compare in this period.
- What is the best time of day to fly from ANC to SEA?
- Departures around 11 p.m. have the best record (91% on-time), while departures around 4 p.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ANC to SEA?
- The scheduled ANC–SEA flight time averages 3h 34m over 1,448 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are ANC to SEA flights cancelled?
- 0.9% 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 ANC to SEA?
- July 2024 was the roughest month in this dataset, with only 75% of arrivals on time. The best was April 2026 at 95%. If your dates are flexible, that 19-point gap is worth planning around.
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Based on 14,659 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.