Carrier route record

DLSEA→OGG

Delta Air Lines · Seattle to Kahului

Flights: 365
Period: September 2025 to August 2026
Share of route: 20%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.

Delta on SEA to OGG earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 365 flights, with a median arrival 10 minutes early.

Set against the rest of the country, Delta's SEA to OGG record is 9 points better than the US average of 77.3%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.

On time

86.0%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

40 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.89%

Whole route

79.2%

Every carrier on SEA to OGG, 1,809 flights

These figures cover 365 flights between September 2025 and August 2026. The median arrival is 10 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

Delta against every carrier on SEA to OGG

Delta flew 365 of the 1,809 flights on SEA to OGG, about 20% of it. Its 86.0% on time is 7 points better than the route as a whole, which runs 79.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Delta at 86.0% to Hawaiian at 70.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

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.

On-time performance by carrier on SEA to OGG
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines (this page)	365	86.0%	40 min	0.82%	A+
Alaska Airlines	1,322	78.2%	46 min	0.61%	B+
Hawaiian Airlinesthin sample	122	70.5%	67 min	0.00%	C+

Flight by flight

Delta flight numbers on SEA to OGG

DL 34413:5986.0% · 365 flights

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 Delta 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 365 flights.

5am–8am—
8am–11am—
11am–2pm38 flights88.9%
2pm–5pm327 flights85.7%
5pm–8pm—
8pm–5am—

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

The 11am–2pm window is the strongest at 88.9% on time. The full set of windows spans 3 points.

Across the year

Delta on SEA to OGG through the year

Darker means more delays. Figures are on-time percentages.May best, July worst

July is the worst month at 77.4% on time, 19 points below May, the best at 96.8%. 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 31 flights.

Across the week, Monday is the strongest day at 92.3% on time and Tuesday the weakest at 78.4%, a spread of 14 points.

Arrival by arrival

How late Delta on SEA to OGG runs when it is late

Delta on SEA to OGG often beats the schedule: 140 of 358 completed flights, 39%, arrived 15 minutes or more early. The 50 late arrivals split 24 under half an hour, 16 between 30 and 60 minutes, and 10 an hour or more.

15+ min early140 flights39.1%
Within 15 min168 flights46.9%
15–29 min late24 flights6.7%
30–59 min late16 flights4.5%
1–2 hours late9 flights2.5%
2+ hours late1 flights0.3%

Scale runs 0% to 100%.

Share of 358 completed flights by arrival against schedule.

A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 18 still arrived on time. In the other direction, 18 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 OGG.

The worst days

Worst days for Delta on SEA to OGG

The latest arrival of the period was on 22 February 2026, 2 hours 30 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across February, August, December and March, with no single month standing out.

The latest arrivals of Delta on SEA to OGG in the period
Date	Arrived late by	Largest filed cause
22 February 2026	2 hours 30 minutes	Extreme weather
5 August 2026	1 hour 30 minutes	Late-arriving aircraft
18 December 2025	1 hour 23 minutes	Carrier
17 March 2026	1 hour 23 minutes	Late-arriving aircraft
19 December 2025	1 hour 18 minutes	National Airspace System

Delay causes

Why Delta runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,015 reported delay minutes.

Carrier
33%
National Airspace System
31%
Late-arriving aircraft
30%
Extreme weather
6%

No single cause dominates. carrier at 33%, national airspace system at 31% and late-arriving aircraft at 30% split the 2,015 reported delay minutes between them. An even spread like this usually means the operation is running close to its designed capacity with no one obvious weak point, and it is the hardest pattern for a traveller to route around. The split is drawn from 2,015 reported delay minutes.

Cancellations are rare at 0.82%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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 is a different operation and performs like one: it runs 95.3% on time across 365 flights, 9 points above 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. 365 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 Delta on SEA to OGG

Put together: treat all of this as provisional. 365 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 86.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 358 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures