Best Time to Fly ANC to SEA: On-Time Stats by Hour & Airline
Ted Stevens Anchorage International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
6,656 flights were scheduled from Anchorage (ANC) to Seattle (SEA) in the last 12 months, and 86.1% of those that flew arrived on time, 8.4 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 3 airlines on the route at 88.3%, while Hawaiian Airlines trailed at 27.4%.
May has been the best month (91% on time) and Monday the weakest day of the week (85%).
0.9% of flights were cancelled, versus 1.8% nationally.
ANC to SEA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 88.3% | 105 min | 0.7% | 1,614 |
| Alaska Airlines | 86.1% | 52 min | 0.9% | 4,980 |
| Hawaiian Airlines | 27.4% | 68 min | 0.0% | 62 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ANC to SEA
On-time arrival % by scheduled departure hour (local time), 13,790 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 90.1% | 0.9% | 1,252 |
| 1am–2am | 87.8% | 0.7% | 1,498 |
| 2am–3am | 78.7% | 0.6% | 811 |
| 4am–5am | Limited data | 11 | |
| 5am–6am | 90.4% | 0.7% | 768 |
| 6am–7am | 87.7% | 0.6% | 1,311 |
| 7am–8am | 85.9% | 0.3% | 676 |
| 8am–9am | 89.9% | 0.5% | 605 |
| 9am–10am | 91.0% | 1.7% | 654 |
| 10am–11am | 90.5% | 1.0% | 716 |
| 11am–12pm | 90.3% | 2.1% | 535 |
| 12pm–1pm | 88.0% | 1.4% | 594 |
| 1pm–2pm | 87.3% | 1.0% | 582 |
| 2pm–3pm | 83.1% | 0.4% | 1,133 |
| 3pm–4pm | 78.9% | 0.5% | 552 |
| 4pm–5pm | 74.0% | 1.1% | 646 |
| 5pm–6pm | 77.2% | 0.4% | 904 |
| 6pm–7pm | 81.3% | 0.6% | 167 |
| 7pm–8pm | 84.5% | 1.0% | 307 |
| 8pm–9pm | Limited data | 15 | |
| 11pm–12am | 90.6% | 0.0% | 53 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ANC to SEA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 92.1% | +5.2 pts | 0.5% | 217 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.6% | -4.3 pts | 1.0% | 490 |
| Summer peak (Jun 15 - Aug 15) | 81.7% | -5.2 pts | 1.2% | 2,986 |
| All other days | 86.9% | — | 0.7% | 10,097 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).