TUS to SEA flight delays
Tucson, AZ (TUS) Seattle, WA (SEA) · 1,215 miles
1,065 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
86.96%
Arrived on time
Within 15 minutes of schedule
0.66%
Cancelled
Share of scheduled flights
63 min
When late, late by
Average across delayed arrivals
9 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In July it ran 20.5 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. SEA to TUS arrives on time 5.2 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Tucson to Seattle keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
The 3 airlines here are separated by under 3 points — close enough to call a tie. Choose on price and departure time.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on TUS to SEA. Alaska Airlines was late most often. Flights ran closest to schedule in July and worst in December.
Every airline on TUS to SEA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Alaska Airlines | 556 | 86.21% | 0.9% | 44 min | B |
| SkyWest Airlines | 371 | 87.33% | 0% | 65 min | A |
| Delta Air Lines | 138 | 88.97% | 1.45% | 152 min | A |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SEA to TUS Seattle back to Tucson 81.79% on time BOther routes from Tucson
Common questions
Are flights from Tucson to Seattle usually delayed?
86.96% of flights on the TUS to SEA route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Tucson to Seattle?
Delta Air Lines, at 88.97% on time across 138 flights. The least punctual on the route was Alaska Airlines at 86.21%.
How often are TUS to SEA flights cancelled?
0.66% of scheduled flights did not operate — about 7 in every thousand. That is in the normal range.
What is the best month to fly Tucson to Seattle?
July, when 94.6% of flights arrived on time. The worst was December at 74.1%.
When TUS to SEA flights are late, how late are they?
About 63 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on TUS to SEA during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →