Route reliability record
OGG→SEA
Kahului to Seattle
- Flights
- 1,809
- Period
- September 2025 to August 2026
- Distance
- 2,639 mi
- Carriers
- 3
This route 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 roughly 55 minutes on average. That rests on 1,809 OGG to SEA flights, of which Delta Air Lines flew 365 at 95.3% on time.
Best time to fly OGG to SEA: a 8am–11am departure, ideally on a Monday. Flights in that window arrived on time 90.5% of the time and Monday flights 83.3%, against 81.1% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 1,774 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.60%
National rate is 1.89%
Best carrier
Delta
95.3% on time across 365 flights
These figures cover 1,809 flights between September 2025 and August 2026. The median arrival is 9 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.
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Carrier by carrier
Which airline is most reliable on OGG to SEA
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 95.3% of the time; Alaska Airlines manages 79.3%. Sample sizes sit next to every figure, because a two-point gap across 1,322 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 365 | 95.3% | 94 min | 1.10% | A |
| Alaska Airlines | 1,322 | 79.3% | 52 min | 1.82% | B |
| Hawaiian Airlinesthin sample | 122 | 58.7% | 47 min | 0.82% | D+ |
The spread between Delta and Alaska is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.
Flight by flight
Flights on OGG to SEA
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Kahului to Seattle
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. OGG → SEAKahului to Seattle | Delta Air Lines | 94.3% | 95.3% | 1.10% | 8pm–5am, Thu | DL 394 22:00 |
| 2. OGG → SEAKahului to Seattle | Alaska Airlines | 77.9% | 79.3% | 1.82% | 8am–11am, Tue | AS 206 21:40 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 29 points, against 16 points between the best and worst carrier.
- 5am–8am83 flights89.0%
- 8am–11am251 flights90.5%
- 11am–2pm270 flights61.6%
- 2pm–5pm446 flights76.5%
- 5pm–8pm—
- 8pm–5am759 flights86.9%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 61.6% on time against 90.5% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8pm–5am window is the busiest, with 759 flights scheduled in it.
Explore
Filter OGG to SEA by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On OGG to SEA, the best departure window is 8am–11am at 90.5% on time and the worst is 11am–2pm at 61.6%, a wide gap of 28.9 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am89.0%
- 8–11am90.5%
- 11am–2pm61.6%
- 2–5pm76.5%
- 5–8pm—
- 8pm–5am86.9%
best all US flightsScale 55% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 16 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
Delays peak in October, when the on-time rate falls to 70.9%. June is the strongest month at 86.5%. Moving a flexible trip across that boundary buys 16 points. March was the busiest month here, with 155 flights.
Across the week, Monday is the strongest day at 83.3% on time and Thursday the weakest at 79.2%, a spread of 4 points.
Delay causes
Why this route gets delayed
Carrier accounts for 44% of the 18,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 34%Late-arriving aircraft
- 15%National Airspace System
- 6%Extreme weather
- 0%Security
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 18,000 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 17,763 reported delay minutes.
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 7,903 of the 18,000 delay minutes reported here.
Cancellations sit at 1.60% against a national 1.89%, which is ordinary. Diversions add another 0.33%.
Connections and stage length
What a delay here actually costs
5.0% 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 roughly 55 minutes, which a normal layover absorbs.
At 2,639 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 runs 79.2% on time across 1,809 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,809 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in SEA after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. June runs 86.5% on time and October 70.9%, a swing of 16 points. If the dates move at all, move them out of October before you think about anything else. 1,774 completed flights over 12 months sit behind that.
Common questions
OGG to SEA questions
How often is OGG to SEA delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.9% of the 1,809 flights in this analysis, against 22.7% nationally. Delayed flights are late by roughly 55 minutes on average.
Which airline is most reliable on OGG to SEA?
Delta Air Lines leads at 95.3% on time across 365 flights. Alaska Airlines is at the other end on 79.3%, a gap of 16 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on OGG to SEA?
The 8am–11am departure window is the strongest at 90.5% on time. The 11am–2pm window is the weakest at 61.6%, 29 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are October delays on OGG to SEA?
October is the weakest month at 70.9% on time, compared with 86.5% in June. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SEA to OGG — the return legseparate record
- Kahului Airport (OGG) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Delta Air Lines on OGG to SEA95.3%
- Alaska Airlines on OGG to SEA79.3%
- Hawaiian Airlines on OGG to SEA58.7%
- OGG to HNL, a related route84.1%
- LAX to SEA, a related route85.0%
- OGG to LAX, a related route80.5%
- Delta Air Lines on-time record95.3%
- Alaska Airlines on-time record79.3%
- Hawaiian Airlines on-time record58.7%
- Same route, different airline: where the carrier you pick matters most
- Why the first flight of the morning is statistically safest
Direction matters. OGG to SEA and SEA to OGG are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.