Carrier route record

ASLAS→PDX

Alaska Airlines · Las Vegas to Portland

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 LAS to PDX lands a B+, 6 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 an hour on average. That is a workable record, not a spotless one. That rests on 1,534 flights, with a median arrival 10 minutes early.

Set against the rest of the country, Alaska's LAS to PDX record is 6 points better than the US average of 77.6%. That gap is worth roughly 56 fewer late arrivals for every thousand flights.

On time

83.2%

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

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.65%

National rate is 1.81%

Whole route

78.8%

Every carrier on LAS to PDX, 2,984 flights

These figures cover 1,534 flights between July 2025 and June 2026. The median arrival is 10 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 LAS to PDX

Alaska flew 1,534 of the 2,984 flights on LAS to PDX, most of the route. Its 83.2% on time is 4 points better than the route as a whole, which runs 78.8%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Spirit at 88.2% to Southwest 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 LAS to PDX
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	128	88.2%	42 min	0.00%	A+
Alaska Airlines (this page)	1,534	83.2%	58 min	0.65%	B+
Frontier Airlinesthin sample	173	76.2%	53 min	2.89%	B
Southwest Airlines	1,149	72.3%	56 min	0.26%	C+

Flight by flight

Alaska flight numbers on LAS to PDX

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 23 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–8am336 flights91.6%
8am–11am29 flights—
11am–2pm336 flights87.7%
2pm–5pm354 flights77.9%
5pm–8pm350 flights82.1%
8pm–5am129 flights68.8%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.6% of the time, against 68.8% for the overnight window. That is 23 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 354 flights scheduled in it.

Across the year

Alaska on LAS to PDX through the year

Darker means more delays. Figures are on-time percentages.February best, October worst

Delays peak in October, when the on-time rate falls to 72.2%. February is the strongest month at 90.4%. Moving a flexible trip across that boundary buys 18 points. March was the busiest month here, with 148 flights.

Across the week, Wednesday is the strongest day at 87.6% on time and Friday the weakest at 78.2%. 9 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Alaska runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 15,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
52%
Carrier
29%
National Airspace System
13%
Extreme weather
6%
Security
0%

52% 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 15,000 reported delay minutes here, that single category outweighs weather by 9 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 14,914 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 91.6% on time here.

Cancellations are rare at 0.65%, 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 4.9% 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 82.7% 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 LAS to PDX

Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 90.4% on time and October 72.2%, a swing of 18 points. If the dates move at all, move them out of October 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