Best Time to Fly BLI to SEA: On-Time Stats by Hour & Airline
Bellingham International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.2% of Bellingham (BLI) to Seattle (SEA) flights arrived on time (1,217 scheduled flights). That is 5.6 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
November has been the best month (87% on time) and Friday the weakest day of the week (77%).
2.1% of flights were cancelled, versus 1.8% nationally.
BLI to SEA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 83.2% | 53 min | 2.1% | 1,217 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BLI to SEA
On-time arrival % by scheduled departure hour (local time), 2,421 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 84.7% | 2.9% | 527 |
| 6am–7am | 92.5% | 0.5% | 200 |
| 8am–9am | 83.3% | 1.4% | 286 |
| 9am–10am | 75.5% | 3.9% | 51 |
| 11am–12pm | 84.1% | 2.2% | 45 |
| 12pm–1pm | 70.5% | 3.7% | 246 |
| 1pm–2pm | 76.5% | 0.0% | 306 |
| 2pm–3pm | 74.8% | 0.7% | 152 |
| 3pm–4pm | 72.2% | 0.0% | 54 |
| 4pm–5pm | 72.7% | 2.6% | 192 |
| 5pm–6pm | 73.2% | 1.6% | 125 |
| 6pm–7pm | 79.9% | 0.9% | 216 |
| 7pm–8pm | Limited data | 21 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BLI to SEA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 81.0% | +1.0 pts | 2.3% | 43 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.2% | +4.2 pts | 5.0% | 101 |
| Summer peak (Jun 15 - Aug 15) | 77.5% | -2.5 pts | 0.2% | 432 |
| All other days | 80.0% | — | 1.9% | 1,845 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).