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Route · HNL → SEA · 2020–2025 BTS data

Honolulu to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), HNL to SEA (Honolulu to Seattle) ranks #654 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.9%
On-time
+0.9 pts
vs US avg
66 min
Delay when late
14,557
Flights
#654 of 4927
Corpus placement

Cancelled

1.3%

Best Month

Sep 2024 88%

Worst Month

Jul 2025 70%

Distance

2,677 mi

Carriers

7

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 255 74 1 1 DL,AS,HA
Nov 2025 236 60 2 0 HA,AS,DL
Oct 2025 247 57 5 1 AS,DL,HA
Sep 2025 240 55 0 0 DL,AS,HA
Aug 2025 248 62 1 0 HA,AS,DL
Jul 2025 248 74 6 0 AS,DL,HA
Jun 2025 241 67 0 0 AS,DL,HA
May 2025 249 48 4 0 AS,DL,HA
Apr 2025 240 61 1 0 HA,AS,DL
Mar 2025 271 53 1 1 AS,DL,HA
Feb 2025 244 52 2 1 AS,DL,HA
Jan 2025 277 61 7 0 AS,DL,HA
Dec 2024 275 42 5 0 AS,DL,HA
Nov 2024 243 35 3 1 HA,AS,DL
Oct 2024 249 43 1 1 AS,DL,HA
Sep 2024 240 29 0 0 AS,DL,HA
Aug 2024 248 48 0 0 AS,DL,HA
Jul 2024 248 42 2 0 AS,DL,HA
Jun 2024 240 46 2 0 AS,DL,HA
May 2024 240 60 1 0 AS,DL,HA
Apr 2024 232 49 1 0 AS,DL,HA
Mar 2024 244 47 2 0 AS,DL,HA
Feb 2024 220 44 1 0 AS,DL,HA
Jan 2024 233 49 28 0 AS,DL,HA

HNL–SEA seasonal on-time pattern

Best: September (85.6%) · weakest: February (73.8%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 76.2%

Strongest calendar month

September

85.6% on-time · ~197 flights/mo

Busiest calendar month

December

~221 flights/mo avg

Weakest calendar month

February

73.8% on-time · ~187 flights/mo

Cancellation Rate

1.3%

76 of 5,908 flights

Diversion Rate

0.1%

6 of 5,908 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

HNL - Honolulu

Full on-time, delay-cause, and seasonal performance for Honolulu, HI.

HNL on-time profile

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

Compare the two airports

See HNL and SEA side by side on delays, cancellations, and reliability.

Compare HNL vs SEA

Origin-hub reliability standing

Mid-pack among HNL departures

From HNL, this corridor sits with 11 other 75–85% on-time routes out of 27 tracked departures, not the hub's reliability leaders (13 at ≥85%) and not the softest ( 3 below 75%). Destination: Seattle · fleet on-time rank #3183 of 4927.

What the Data Says About HNL to SEA

14,557 tracked flights put the HNL to SEA pairing (Honolulu to Seattle) at a 79.9% on-time rate, squarely in line with the wider network. Delays that do occur run 65.5 minutes on average. Across the 2,677-mile route and its 7 carriers, the trailing 24 months show 1.3% cancelled and 0.1% diverted (5,908 flights sampled).

The monthly split is wide on this route: Sep 2024 posted the strongest performance at 88% on-time, while Jul 2025 came in at just 70% - a 18-point swing worth factoring into travel timing.

On the multi-year calendar, HNL–SEA peaks in September at 85.6% on-time while December carries the heaviest traffic (~221 flights per month) ; the softest month is February at 73.8%, a 11.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does HNL to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, HNL to SEA ranks #654 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from HNL to SEA? ▼
Flights from Honolulu to Seattle have a 79.9% on-time rate based on 14,557 flights. The average delay is 65.5 minutes. The best recent month was Sep 2024 with 88% on-time.
What is the cancellation rate for HNL to SEA? ▼
Over the last 24 months, 1.3% of flights on this route were cancelled (76 of 5,908 flights) and 0.1% were diverted.
How far is the flight from HNL to SEA? ▼
The flight distance from Honolulu (HNL) to Seattle (SEA) is approximately 2,677 miles. This route is served by 7 carriers.
When is the best time to fly from HNL to SEA? ▼
The best recent month for on-time performance was Sep 2024 (88% on-time). The worst was Jul 2025 (70% on-time). Consider booking during months with historically better performance.

Airports on this route

HNL Airport

Honolulu
SEA Airport

Seattle
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using HNL–SEA data

HNL–SEA is mid-pack at 79.9% on-time; month and carrier mix move more than the corridor headline.

  • Compare HNL and SEA airport profiles: delay causes and top routes differ even on the same corridor. HNL airport
  • If your dates flex, September (85.6% on-time) beats February (73.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.9% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.