Carrier route record

ASPDX→LAS

Alaska Airlines · Portland to Las Vegas

Flights: 1,534
Period: July 2025 to June 2026
Share of route: 51%
Carriers: 4

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Alaska Airlines.

Alaska on PDX to LAS lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That is a workable record, not a spotless one. That rests on 1,534 flights, with a median arrival 4 minutes early.

Set against the rest of the country, Alaska's PDX to LAS record is 5 points better than the US average of 77.6%. That gap is worth roughly 51 fewer late arrivals for every thousand flights.

On time

82.7%

Arrivals under 15 minutes late, of 1,524 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.52%

National rate is 1.81%

Whole route

80.2%

Every carrier on PDX to LAS, 2,983 flights

These figures cover 1,534 flights between July 2025 and June 2026. The median arrival is 4 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.

Carrier by carrier

Alaska against every carrier on PDX to LAS

Alaska flew 1,534 of the 2,983 flights on PDX to LAS, most of the route. Its 82.7% on time is 3 points better than the route as a whole, which runs 80.2%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Spirit at 86.6% to Frontier at 72.3%. Two 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 PDX to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	128	86.6%	90 min	0.00%	A+
Alaska Airlines (this page)	1,534	82.7%	51 min	0.52%	B+
Southwest Airlines	1,149	77.2%	46 min	0.17%	B+
Frontier Airlinesthin sample	172	72.3%	101 min	3.49%	C−

Flight by flight

Alaska flight numbers on PDX to LAS

Departure window

When Alaska runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am318 flights86.7%
8am–11am328 flights83.6%
11am–2pm45 flights80.0%
2pm–5pm368 flights84.2%
5pm–8pm308 flights80.3%
8pm–5am167 flights75.3%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 86.7% of the time, against 75.3% for the overnight window. That is 11 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 368 flights scheduled in it.

Across the year

Alaska on PDX to LAS through the year

Darker means more delays. Figures are on-time percentages.May best, December worst

December is the weak month at 72.0% on time, against 90.8% in May. 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. March was the busiest month here, with 148 flights.

Across the week, Saturday is the strongest day at 87.1% on time and Sunday the weakest at 79.7%. 7 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Alaska runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 13,000 reported delay minutes.

Late-arriving aircraft
38%
Carrier
33%
National Airspace System
28%
Extreme weather
0%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 13,000 reported delay minutes here, that single category outweighs weather by 38 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 13,326 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.7% on time here.

Cancellations are rare at 0.52%, below the national 1.81% 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.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 4.0% land an hour or more behind schedule, against 8.1% 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 763 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 83.2% on time across 1,534 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

The sample behind these figures is 1,534 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.

What to do with this

Booking Alaska on PDX to LAS

Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 90.8% on time and December 72.0%, a swing of 19 points. If the dates move at all, move them out of December before you think about anything else. 1,524 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures