Route reliability record
LAS→PDX
Las Vegas to Portland
- Flights
- 2,932
- Period
- September 2025 to August 2026
- Distance
- 763 mi
- Carriers
- 4
This route lands a B+, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 2,932 LAS to PDX flights, of which Alaska Airlines flew 1,570 at 82.7% on time.
Best time to fly LAS to PDX: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 92.3% of the time and Saturday flights 83.5%, against 78.2% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.2%
Arrivals under 15 minutes late, of 2,911 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.65%
National rate is 1.89%
Best carrier
Alaska
82.7% on time across 1,570 flights
These figures cover 2,932 flights between September 2025 and August 2026. The median arrival is 5 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
Which airline is most reliable on LAS to PDX
The choice of carrier is not cosmetic here. Alaska Airlines arrives on time 82.7% of the time; Southwest Airlines manages 72.2%. Sample sizes sit next to every figure, because a two-point gap across 1,150 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 29 | 92.9% | 62 min | 0.00% | A+ |
| Alaska Airlines | 1,570 | 82.7% | 59 min | 0.57% | B+ |
| Frontier Airlinesthin sample | 183 | 75.0% | 87 min | 3.83% | B− |
| Southwest Airlines | 1,150 | 72.2% | 54 min | 0.26% | C+ |
Alaska leads Southwest by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Flights on LAS to PDX
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Las Vegas to Portland
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. LAS → PDXLas Vegas to Portland | Alaska Airlines | 82.2% | 82.7% | 0.57% | 5am–8am, Wed | AS 1467 11:00 |
| 2. LAS → PDXLas Vegas to Portland | Southwest Airlines | 72.0% | 72.2% | 0.26% | 5am–8am, Sat | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 points, against 11 points between the best and worst carrier.
- 5am–8am455 flights92.3%
- 8am–11am394 flights86.6%
- 11am–2pm449 flights86.1%
- 2pm–5pm614 flights72.7%
- 5pm–8pm616 flights73.0%
- 8pm–5am404 flights61.6%
Scale runs 55% to 100%.
The 8pm–5am window is where this operation falls apart: 61.6% on time, against 92.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 616 flights scheduled in it.
Explore
Filter LAS to PDX by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On LAS to PDX, the best departure window is 5am–8am at 92.3% on time and the worst is 8pm–5am at 61.6%, a wide gap of 30.7 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am92.3%
- 8–11am86.6%
- 11am–2pm86.1%
- 2–5pm72.7%
- 5–8pm73.0%
- 8pm–5am61.6%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
This route's year swings by 15 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 72.4% on time, against 87.4% in February. 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. July was the busiest month here, with 276 flights.
Across the week, Saturday is the strongest day at 83.5% on time and Friday the weakest at 72.7%, a spread of 11 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 56% of the 37,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 32%Carrier
- 10%National Airspace System
- 2%Extreme weather
- 0%Security
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 37,000 reported delay minutes here, that single category outweighs weather by 23 to one. The split is drawn from 37,012 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 92.3% on time here.
Cancellations are rare at 0.65%, below the national 1.89% 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 actually costs
6.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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.
The return leg runs 79.9% on time across 2,934 flights, within 2 points 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 2,932 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.
Work out the risk of missing a connection in PDX after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 87.4% on time and December 72.4%, a swing of 15 points. If the dates move at all, move them out of December before you think about anything else. 2,911 completed flights over 12 months sit behind that.
Common questions
LAS to PDX questions
How often is LAS to PDX delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.8% of the 2,932 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on LAS to PDX?
Alaska Airlines leads at 82.7% on time across 1,570 flights. Southwest Airlines is at the other end on 72.2%, a gap of 11 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 LAS to PDX?
The 5am–8am departure window is the strongest at 92.3% on time. The 8pm–5am window is the weakest at 61.6%, 31 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 LAS to PDX?
December is the weakest month at 72.4% on time, compared with 87.4% in February. Across the year that is 15 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- PDX to LAS — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Portland International (PDX) delay statistics
- Alaska Airlines on LAS to PDX82.7%
- Frontier Airlines on LAS to PDX75.0%
- Southwest Airlines on LAS to PDX72.2%
- LAS to LAX, a related route77.9%
- SEA to PDX, a related route82.2%
- LAS to DEN, a related route76.5%
- Spirit Airlines on-time record92.9%
- Alaska Airlines on-time record82.7%
- Frontier Airlines on-time record75.0%
- Same route, different airline: where the carrier you pick matters most
- Why the first flight of the morning is statistically safest
Direction matters. LAS to PDX and PDX to LAS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.