Route on-time record
TUS to SEA: most on-time flights and the best time to fly
Tucson (Tucson International Airport) to Seattle (Seattle–Tacoma International Airport). 1,065 nonstop flights in Jun 2025 to May 2026, 87% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was SkyWest 3679 at 11:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
TUS → SEA
Tucson to Seattle: 1,065 nonstop flights a year
On time (12 months)
87%
Cancelled
0.7%
avg delay 9 min
Best time to leave
Before 9 AM
90% on time vs 74% 3 to 6 PM
Most reliable airline
SkyWest
88% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 3679 · sold as United Express, Delta Connection, American Eagle or Alaska
11:45 AM → 3:20 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 96% of the time (25 flights, Jun 2025 to May 2026).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find 11:45 AM flight fares Opens this date on Aviasales#2 · Alaska 767
7:46 AM → 11:12 AM3h 26m nonstop
Local times, typical schedule. Last flown 2026-05-12.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 1.4%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (217 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 74%).
Strong track record · 217 flights
Find Alaska 767 fares Opens this date on Aviasales#3 · Delta 2251
1:30 PM → 4:58 PM3h 28m nonstop
Local times, typical schedule. Last flown 2026-05-06.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 1.6%
- Avg arrival delay
- 20 min
- Arrived on time 88% of the time (120 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Moderate track record · 120 flights
Find Delta 2251 fares Opens this date on Aviasales#4 · SkyWest 3287 · sold as United Express, Delta Connection, American Eagle or Alaska
8:07 AM → 11:39 AM3h 32m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 74% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 74%).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find 8:07 AM flight fares Opens this date on Aviasales#5 · Alaska 641
3:44 PM → 7:10 PM3h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.6%
- Avg arrival delay
- 10 min
- Arrived on time 81% of the time (333 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 74% on time; Before 9 AM: 90%).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 333 flights
Find Alaska 641 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)88%
371 flights · 88% on time as flown · 0.2% cancel
- Delta Air Lines87%
138 flights · 89% on time as flown · 1.0% cancel
- Alaska Airlines85%
556 flights · 86% on time as flown · 0.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
358 flights · avg delay 6 min
- Noon to 3 PM89%
503 flights · avg delay 9 min
- 3 to 6 PM74%
173 flights · avg delay 15 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)46%
- Late-arriving aircraft37%
- Air traffic control and airport volume13%
- Severe weather5%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
TUS to SEA questions
- What time of day is best to fly TUS to SEA?
- Before 9 AM: 90% of flights arrived on time, against 74% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from TUS to SEA?
- SkyWest, with a season-adjusted 88% chance of operating and arriving on time over 371 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on TUS to SEA?
- June (74% on time); the best was February (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from TUS
- SEA to TUS (return)
- TUS to PHX 84%
- TUS to DEN 82%
- TUS to LAX 86%
- TUS to DFW 80%
- TUS to LAS 85%
- TUS to SLC 94%
- TUS to ORD 76%
- TUS to SFO 75%
- TUS to ATL 92%
- TUS to SAN 78%
- TUS to PDX 93%
- TUS to MDW 84%
Live status: FAA delays and ground stops