ANC to SEA flight delays
ANC SEA Ted Stevens Anchorage to Seattle Tacoma · 1,448 miles
21,631 flights were scheduled from ANC to SEA over July 2023 through June 2026. Of the 21,427 that made the trip, 84.9% reached the gate less than 15 minutes behind schedule. These are arrival figures: “on time” means the flight reached the gate less than 15 minutes behind schedule. Arrivals are what decide whether you make the connection, so route and airline pages are scored on them rather than on pushback.
Data through June 2026 · Bureau of Transportation Statistics
The route in brief
- Flights in the window
- 21,631
- Arrived on time
- 84.9%
- Cancelled
- 0.9%
- Scheduled distance
- 1,448 miles
Cancellations are counted against everything scheduled. Diverted flights are counted with them rather than as very late arrivals, which is why the on-time share and the cancellation rate do not add up to everything that happened.
Airline by airline
Airlines with at least 100 flights on ANC–SEA, busiest first. Same route, same weather, same air traffic — which makes this the fairest comparison on the site.
| Airline | Arrived on time | Typical delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 83.7% | 47 min | 1% | 16,554 |
| Delta Air Lines | 90.5% | 101 min | 0.4% | 4,915 |
| Hawaiian Airlines | 30.8% | 74 min | 1.9% | 162 |
Month by month
July was the month to avoid on ANC–SEA: 79.2% of flights arrived on time, against 91.1% in May. Each bar pools three years of that calendar month.
| Month | Share flights that arrived on time | Flights |
|---|---|---|
| January | 80.7% | 1,487 |
| February | 87.9% | 1,333 |
| March | 84.7% | 1,490 |
| April | 88.6% | 1,514 |
| May | 91.1% | 1,949 |
| June | 86.5% | 2,156 |
| July | 79.2% | 2,448 |
| August | 83.4% | 2,422 |
| September | 85.1% | 1,985 |
| October | 87.8% | 1,741 |
| November | 84.3% | 1,563 |
| December | 80.9% | 1,543 |
Both ends of the route
A route’s record is built out of two airports’ habits. The hour-by-hour grid for each is on its own page.
ANC to SEA in one number
ANC → SEA
When a flight on this route was late, it was late by about 56 min.
Questions about ANC to SEA
- Which airline is most reliable from ANC to SEA?
- Delta Air Lines — its flights on this pairing arrived on time 90.5% of the time, with 4,915 scheduled. Hawaiian Airlines came in at 30.8% over 162 scheduled. Airlines with fewer than 100 flights on the route are not rated.
- What is the worst month to fly ANC to SEA?
- July, at 79.2% of arrivals on time, with 2,448 flights scheduled. May was the best of the year at 91.1%.
- How late are ANC–SEA flights when they are late?
- 56 min on average, counting only the flights that arrived 15 minutes or more behind schedule. The on-time flights are left out of that average on purpose — mixing them in would flatter it.
- How often is the ANC to SEA flight cancelled?
- 0.9% of scheduled flights on this route were cancelled, July 2023 through June 2026. Diverted flights are counted with the cancellations rather than as late arrivals.
- Are these departure or arrival numbers?
- Arrival. A flight counts as on time here if it reached the gate at SEA less than 15 minutes behind schedule. Airport pages score departures instead, because that is the number you can act on when you pick a booking time.