ANC to SEA flight delays & on-time performance
Nonstop flights from Ted Stevens Anchorage International Airport to Seattle–Tacoma International Airport · 1,448 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ANC or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Anchorage (ANC) to Seattle (SEA) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 4% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (88% on time); Alaska Airlines was the least (86%).
- Departures scheduled around 9am did best (92% on time); around 4pm did worst (76%).
- Wednesday was the most reliable day to fly (88% on time) and Thursday the least (85%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
Which airline is most on time from ANC to SEA?
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 | 88% | 0.7% | 13 min | 4.8% | 1,614 |
| Alaska Airlines | 86% | 0.9% | 8 min | 3.5% | 4,980 |
| Hawaiian Airlines | 27% | 0.0% | 51 min | 16.1% | 62 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am91%631 flights
- 1am90%695 flights
- 2am82%357 flights
- 5am89%277 flights
- 6am87%668 flights
- 7am85%324 flights
- 8am90%312 flights
- 9am92%319 flights
- 10am88%303 flights
- 11am92%359 flights
- 12pm88%252 flights
- 1pm87%336 flights
- 2pm81%497 flights
- 3pm79%307 flights
- 4pm76%294 flights
- 5pm76%457 flights
- 6pm84%117 flights
- 7pm86%124 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday86%0.8% cancelled
- Tuesday86%0.6% cancelled
- Wednesday88%0.6% cancelled
- Thursday85%0.8% cancelled
- Friday86%1.3% cancelled
- Saturday86%0.8% cancelled
- Sunday87%1.1% 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)45%
- Late-arriving aircraft33%
- Air traffic control & airport congestion14%
- Extreme weather8%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)66%
- Extreme weather26%
- Air traffic control & airport congestion9%
- Security0%
ANC to SEA: common questions
- How often are ANC to SEA flights on time?
- 86% 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 Anchorage to Seattle cancelled?
- 0.9% of scheduled flights were cancelled (58 of 6,656).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 3.9% of flights were an hour or more late.
- How long is taxi time at ANC?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to ANC — 76% on time
More flights from Anchorage
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ANC → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.