ANC to SEA flight delays
Anchorage, AK (ANC) Seattle, WA (SEA) · 1,448 miles
6,681 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
85.49%
Arrived on time
Within 15 minutes of schedule
1.12%
Cancelled
Share of scheduled flights
64 min
When late, late by
Average across delayed arrivals
10 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 61.3 points more often than Hawaiian Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The two directions do not behave alike. SEA to ANC arrives on time 10.3 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Anchorage to Seattle keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
This is one of the heavily flown routes in the record — 6,681 flights in the period. Frequency is itself a form of insurance: when a flight goes wrong there is another one within hours, which is not true of the thin routes elsewhere on this site.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on ANC to SEA. Hawaiian Airlines was late most often. Flights ran closest to schedule in April and worst in August.
Every airline on ANC to SEA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Alaska Airlines | 4,926 | 85.72% | 1.24% | 52 min | B |
| Delta Air Lines | 1,630 | 89.12% | 0.67% | 105 min | A |
| Hawaiian Airlines | 125 | 27.87% | 2.4% | 74 min | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SEA to ANC Seattle back to Anchorage 75.18% on time COther routes from Anchorage
Common questions
Are flights from Anchorage to Seattle usually delayed?
85.49% of flights on the ANC to SEA route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Anchorage to Seattle?
Delta Air Lines, at 89.12% on time across 1,630 flights. The least punctual on the route was Hawaiian Airlines at 27.87%.
How often are ANC to SEA flights cancelled?
1.12% of scheduled flights did not operate — about 11 in every thousand. That is in the normal range.
What is the best month to fly Anchorage to Seattle?
April, when 94.7% of flights arrived on time. The worst was August at 77.1%.
When ANC to SEA flights are late, how late are they?
About 64 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ANC to SEA during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →