Tucson (TUS) to Seattle (SEA): On-Time Performance
Data through July 2026
Tucson (TUS) to Seattle (SEA) effectively runs on two schedules. In July 2025, 95% of arrivals were on time; in August 2024 that fell to 65% — a 30-point seasonal swing. Across the full period the route averages 84% on-time against a national 78%.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 2.9
- last 12 months
- Duration
- 3h 24m
- scheduled
- Distance
- 1,215 mi
Best airline from TUS to SEA
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 88% | 14 min | 1.3% | 315 |
| SkyWest Airlines | 85% | 10 min | 0.1% | 760 |
| Alaska Airlines | 83% | 9 min | 0.5% | 1,135 |
Monthly on-time trend
Best time to fly from TUS to SEA
Aim for departures around 6 a.m. (94% on-time); avoid 3 p.m. departures (72%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 9 min |
| Tuesday | 84% | 9 min |
| Wednesdaybest | 87% | 10 min |
| Thursday | 84% | 12 min |
| Friday | 82% | 11 min |
| Saturday | 86% | 9 min |
| Sunday | 82% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft39%
- Airline operations40%
- National airspace system15%
- Weather5%
Frequently asked questions
- How often are flights from TUS to SEA delayed?
- 16% of TUS–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 10 minutes.
- Which airline is most reliable from TUS to SEA?
- Delta Air Lines has the best on-time record on this route at 88%, based on 315 flights. 3 airlines flew TUS–SEA frequently enough to compare in this period.
- What is the best time of day to fly from TUS to SEA?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 3 p.m. have the worst (72%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from TUS to SEA?
- The scheduled TUS–SEA flight time averages 3h 24m over 1,215 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are TUS to SEA flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from TUS to SEA?
- August 2024 was the roughest month in this dataset, with only 65% of arrivals on time. The best was July 2025 at 95%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 2,210 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.