Carrier route record
ASLIH→SEA
Alaska Airlines · Lihue to Seattle
- Flights
- 729
- Period
- September 2025 to August 2026
- Share of route
- 67%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Alaska Airlines.
Alaska on LIH to SEA lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 729 flights, with a median arrival 6 minutes early.
Set against the rest of the country, Alaska's LIH to SEA record is 4 points better than the US average of 77.3%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.
Key figures
On time
81.3%
Arrivals under 15 minutes late, of 717 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
1.51%
National rate is 1.89%
Whole route
83.5%
Every carrier on LIH to SEA, 1,094 flights
These figures cover 729 flights between September 2025 and August 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Alaska against every carrier on LIH to SEA
Alaska flew 729 of the 1,094 flights on LIH to SEA, most of the route. Its 81.3% on time is 2 points worse than the route as a whole, which runs 83.5%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 88.0% to Alaska at 81.3%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 365 | 88.0% | 77 min | 3.29% | A− |
| Alaska Airlines (this page) | 729 | 81.3% | 57 min | 1.51% | B |
Flight by flight
Alaska flight numbers on LIH to SEA
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Alaska runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 729 flights.
- 5am–8am—
- 8am–11am58 flights86.2%
- 11am–2pm289 flights80.8%
- 2pm–5pm18 flights—
- 5pm–8pm—
- 8pm–5am364 flights80.5%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 86.2% on time for the 8am–11am window against 80.5% for 8pm–5am. Worth taking if the schedule allows, not worth an extra connection. The 8pm–5am window is the busiest, with 364 flights scheduled in it.
Across the year
Alaska on LIH to SEA through the year
July is the worst month at 71.7% on time, 20 points below January, the best at 91.8%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 85.6% on time and Tuesday the weakest at 77.2%, a spread of 8 points.
Arrival by arrival
How late Alaska on LIH to SEA runs when it is late
Alaska on LIH to SEA often beats the schedule: 265 of 717 completed flights, 37%, arrived 15 minutes or more early. The 134 late arrivals split 60 under half an hour, 37 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early265 flights37.0%
- Within 15 min318 flights44.4%
- 15–29 min late60 flights8.4%
- 30–59 min late37 flights5.2%
- 1–2 hours late25 flights3.5%
- 2+ hours late12 flights1.7%
Scale runs 0% to 100%.
Share of 717 completed flights by arrival against schedule.
A late pushback is often recovered here: of 166 departures that left 15 minutes late or more, 75 still arrived on time. In the other direction, 43 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.
The worst days
Worst days for Alaska on LIH to SEA
The latest arrival of the period was on 3 May 2026, 7 hours 50 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across May, March, December and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 May 2026 | 7 hours 50 minutes | Late-arriving aircraft |
| 13 March 2026 | 6 hours 58 minutes | Carrier |
| 19 December 2025 | 3 hours 57 minutes | Late-arriving aircraft |
| 12 March 2026 | 3 hours 43 minutes | Extreme weather |
| 4 January 2026 | 3 hours 6 minutes | National Airspace System |
Delay causes
Why Alaska runs late on this route
Late-arriving aircraft accounts for 50% of the 7,680 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 28%Carrier
- 18%National Airspace System
- 3%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,680 reported delay minutes here, that single category outweighs weather by 14 to one. The split is drawn from 7,680 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.2% on time here.
Cancellations sit at 1.51% against a national 1.89%, which is ordinary. Diversions add another 0.14%.
Connections and stage length
What a delay here costs
5.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 2,700 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 72.2% on time across 729 flights, 9 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 9 points of difference.
One caution: this is a thin sample. 729 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Alaska on LIH to SEA
Put together: treat all of this as provisional. 729 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 81.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 717 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.