Carrier performance at one airport

OO→PDX

SkyWest Airlines at Portland International

Departures: 10,452
Period: June 2025 to May 2026
Routes: 25
Rank here: #2 of 9

SkyWest Airlines at Portland earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.4%. When something does go wrong the average delay runs about an hour. That rests on 10,452 flights, of which Delta Air Lines flew 7,318 at 89.4% on time.

Measured against the airport rather than the country, SkyWest Airlines runs 2 points ahead of the 82.4% weighted average across all carriers at PDX. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.

On time

84.7%

10,370 completed departures

Avg delay

63 min

Across delayed flights only

Cancelled

0.57%

At PDX, this carrier only

Rank here

Of 9 carriers clearing the floor at PDX

These figures cover 10,000 flights between June 2025 and May 2026. The median arrival is 6 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.

Against the competition

Every carrier at PDX, ranked

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 89.4% of the time; Hawaiian Airlines manages 57.7%. Sample sizes sit next to every figure, because a two-point gap across 540 flights means less than a ten-point one.

On-time performance of all carriers departing PDX
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	7,318	89.4%	77 min	0.98%	A+
SkyWest Airlines (this page)	10,452	84.7%	63 min	0.57%	B+
Alaska Airlines	22,840	82.8%	47 min	0.74%	B+
United Airlines	6,521	82.3%	65 min	0.67%	B+
American Airlines	4,386	79.7%	98 min	1.92%	B
Southwest Airlines	8,633	77.1%	48 min	0.32%	B+
Frontier Airlines	1,008	76.1%	74 min	1.79%	B
Allegiant Air	436	72.1%	119 min	0.00%	C+
Hawaiian Airlines	540	57.7%	74 min	0.93%	D+

The spread between Delta and Hawaiian is 32 points, wide enough that it should decide the booking. On a hundred trips that is 32 more arrivals inside the on-time window.

Route by route

Where SkyWest Airlines flies from PDX

SkyWest Airlines operates 25 routes out of PDX with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.

SkyWest Airlines routes from PDX
Route	Flights	On time	Avg delay	Cancelled	Grade
PDX to SEA · Seattle	3,492	84.2%	57 min	0.54%	B+
PDX to FAT · Fresno	656	84.2%	79 min	0.30%	B+
PDX to SLC · Salt Lake City	601	84.5%	52 min	0.17%	B+
PDX to LAX · Los Angeles	598	79.8%	115 min	0.33%	B+
PDX to STS · Santa Rosa	565	81.3%	64 min	0.35%	B+
PDX to EUG · Eugene	524	91.7%	47 min	1.34%	A
PDX to SMF · Sacramento	518	83.7%	59 min	0.19%	B+
PDX to SJC · San Jose	499	87.3%	52 min	0.00%	A+
PDX to SFO · San Francisco	485	85.9%	73 min	0.41%	A+
PDX to GEG · Spokane	403	86.6%	47 min	0.25%	A+
PDX to TUS · Tucsonthin sample	318	84.9%	57 min	0.00%	B+
PDX to BOI · Boisethin sample	279	89.8%	60 min	1.79%	A
PDX to RDM · Redmondthin sample	268	83.0%	53 min	1.49%	B
PDX to PSP · Palm Springsthin sample	230	73.8%	55 min	2.17%	C
PDX to MFR · Medfordthin sample	201	88.1%	71 min	2.99%	A
PDX to RNO · Renothin sample	168	86.7%	50 min	0.00%	A+
PDX to PHX · Phoenixthin sample	86	90.7%	151 min	0.00%	A+
PDX to SBP · San Luis Obispothin sample	85	92.9%	64 min	1.18%	A
PDX to BZN · Bozemanthin sample	84	91.7%	58 min	0.00%	A+
PDX to BLI · Bellinghamthin sample	75	95.9%	39 min	1.33%	A
PDX to ONT · Ontariothin sample	62	82.3%	49 min	0.00%	B+
PDX to MSO · Missoulathin sample	56	91.1%	83 min	0.00%	A+
PDX to OAK · Oaklandthin sample	52	88.5%	50 min	0.00%	A+
PDX to SAN · San Diegothin sample	41	90.2%	68 min	0.00%	A+
PDX to FCA · Kalispellthin sample	30	70.0%	47 min	0.00%	C+

Departure window

Best time of day for this operation

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 10,000 flights.

5am–8am1,777 flights86.8%
8am–11am1,612 flights84.6%
11am–2pm955 flights88.4%
2pm–5pm2,706 flights85.4%
5pm–8pm2,334 flights79.5%
8pm–5am1,068 flights87.8%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 11am–2pm slot at 88.4% on time, ahead of 5pm–8pm at 79.5%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation.

Across the year

Seasonal pattern

Darker means more delays. Figures are on-time percentages.April best, June worst

December is the weak month at 79.7% on time, against 89.6% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.

Delay causes

What holds this operation up

Carrier
44%
Late-arriving aircraft
33%
National Airspace System
13%
Extreme weather
9%
Security
0%

The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 45,000 of the 100,000 delay minutes reported here.

Cancellations are rare at 0.57%, below the national 1.80% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.2% 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 sample behind these figures is 10,452 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

Put together: SkyWest's PDX operation record is 84.7% on time with 0.57% cancelled, worth a B+. The largest single lever is the 11am–2pm departure window, and the numbers below the table are where the reasoning behind that lives.

Common questions

SkyWest Airlines at PDX

How often is SkyWest Airlines at PDX delayed?

About one flight in seven arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 15.3% of the 10,452 flights in this analysis, against 22.6% nationally. Delayed flights are late by about an hour on average.

Which airline is most reliable on SkyWest Airlines at PDX?

Delta Air Lines leads at 89.4% on time across 7,318 flights. Hawaiian Airlines is at the other end on 57.7%, a gap of 32 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.

What time of day has the fewest delays on SkyWest Airlines at PDX?

The 11am–2pm departure window is the strongest at 88.4% on time. The 5pm–8pm window is the weakest at 79.5%, 9 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.

How bad are December delays on SkyWest Airlines at PDX?

December is the weakest month at 79.7% on time, compared with 89.6% in April. Across the year that is 10 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.

Key figures