Carrier route record

OOSEA→TUS

SkyWest Airlines · Seattle to Tucson

Flights: 371
Period: September 2025 to August 2026
Share of route: 35%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SEA to TUS earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 371 flights, with a median arrival 7 minutes early.

Set against the rest of the country, SkyWest's SEA to TUS record is 11 points better than the US average of 77.3%. That gap is worth roughly 108 fewer late arrivals for every thousand flights.

On time

88.1%

Arrivals under 15 minutes late, of 370 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

Whole route

82.5%

Every carrier on SEA to TUS, 1,065 flights

These figures cover 371 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Carrier by carrier

SkyWest against every carrier on SEA to TUS

SkyWest flew 371 of the 1,065 flights on SEA to TUS, about 35% of it. Its 88.1% on time is 6 points better than the route as a whole, which runs 82.5%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 88.1% to Alaska at 78.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on SEA to TUS
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	371	88.1%	62 min	0.00%	A+
Delta Air Linesthin sample	138	83.8%	73 min	1.45%	B
Alaska Airlines	556	78.5%	38 min	0.54%	B+

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Departure window

When SkyWest runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 10 points, against half a point between the best and worst carrier.

5am–8am—
8am–11am227 flights92.1%
11am–2pm—
2pm–5pm—
5pm–8pm144 flights81.8%
8pm–5am—

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 92.1% of the time, against 81.8% for the evening window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 227 flights scheduled in it.

Across the year

SkyWest on SEA to TUS through the year

Jul–Sep 202560 flights81.7%
Oct–Dec 202583 flights89.2%
Apr–Jun 2026104 flights86.5%
Jul–Sep 2026124 flights91.9%

Scale runs 75% to 95%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 88.1% on time across 371 flights.

SkyWest on SEA to TUS did not run the same all year. Its best quarter was Jul–Sep 2026 at 91.9% on time and its weakest Jul–Sep 2025 at 81.7%, a swing of 10 points on roughly 93 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Wednesday is the strongest day at 96.2% on time and Thursday the weakest at 77.8%, a spread of 18 points.

Arrival by arrival

How late SkyWest on SEA to TUS runs when it is late

SkyWest on SEA to TUS often beats the schedule: 108 of 370 completed flights, 29%, arrived 15 minutes or more early. The 44 late arrivals split 20 under half an hour, 10 between 30 and 60 minutes, and 14 an hour or more.

15+ min early108 flights29.2%
Within 15 min218 flights58.9%
15–29 min late20 flights5.4%
30–59 min late10 flights2.7%
1–2 hours late6 flights1.6%
2+ hours late8 flights2.2%

Scale runs 0% to 100%.

Share of 370 completed flights by arrival against schedule.

A late pushback is often recovered here: of 42 departures that left 15 minutes late or more, 13 still arrived on time. 15 flights left on time and still arrived late.

The worst days

Worst days for SkyWest on SEA to TUS

The latest arrival of the period was on 25 June 2026, 4 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.

The latest arrivals of SkyWest on SEA to TUS in the period
Date	Arrived late by	Largest filed cause
25 June 2026	4 hours 3 minutes	Late-arriving aircraft
27 September 2025	3 hours 22 minutes	Carrier
22 June 2026	3 hours 1 minute	Late-arriving aircraft
11 September 2025	2 hours 58 minutes	Extreme weather
21 July 2026	2 hours 55 minutes	Late-arriving aircraft

Delay causes

Why SkyWest runs late on this route

Late-arriving aircraft accounts for 44% of the 2,709 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
44%
Carrier
41%
Extreme weather
8%
National Airspace System
7%

44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,709 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 2,709 reported delay minutes.

The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,120 of the 2,709 delay minutes reported here.

Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,215 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg runs 86.8% on time across 371 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 371 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking SkyWest on SEA to TUS

Put together: treat all of this as provisional. 371 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 88.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 370 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures