SEA to ANC flight delays
Seattle, WA (SEA) Anchorage, AK (ANC) · 1,448 miles
665 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
75.98%
Arrived on time
Within 15 minutes of schedule
0.45%
Cancelled
Share of scheduled flights
42 min
When late, late by
Average across delayed arrivals
12 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. ANC to SEA arrives on time 13.7 points more 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.
The 2 airlines here are separated by under 2 points — close enough to call a tie. Choose on price and departure time.
Flights from Seattle to Anchorage run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, Alaska Airlines arrived on time most often on SEA to ANC. Delta Air Lines was late most often.
Every airline on SEA to ANC
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 | 515 | 76.37% | 0.58% | 39 min | C |
| Delta Air Lines | 150 | 74.67% | 0% | 51 min | C |
The return leg
ANC to SEA Anchorage back to Seattle 89.68% on time AOther routes from Seattle
Common questions
Are flights from Seattle to Anchorage usually delayed?
75.98% of flights on the SEA to ANC route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Seattle to Anchorage?
Alaska Airlines, at 76.37% on time across 515 flights. The least punctual on the route was Delta Air Lines at 74.67%.
How often are SEA to ANC flights cancelled?
0.45% of scheduled flights did not operate — about 5 in every thousand. That is in the normal range.
When SEA to ANC flights are late, how late are they?
About 42 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 SEA to ANC during March 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 →