Carrier route record
F9LAS→PDX
Frontier Airlines · Las Vegas to Portland
- Flights
- 173
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on LAS to PDX lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 173 flights. The strongest carrier on the route with a full sample, Alaska Airlines, flew 1,534 at 83.2% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Frontier on LAS to PDX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.2%
Arrivals under 15 minutes late, of 168 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
2.89%
National rate is 1.81%
Whole route
78.8%
Every carrier on LAS to PDX, 2,984 flights
These figures cover 173 flights between July 2025 and June 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Frontier against every carrier on LAS to PDX
Frontier flew 173 of the 2,984 flights on LAS to PDX, about 6% of it. Its 76.2% on time is 3 points worse than the route as a whole, which runs 78.8%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Spirit at 88.2% to Southwest at 72.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Alaska Airlines arrives on time 83.2% of the time; Southwest Airlines manages 72.3%. Sample sizes sit next to every figure, because a two-point gap across 1,149 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 128 | 88.2% | 42 min | 0.00% | A+ |
| Alaska Airlines | 1,534 | 83.2% | 58 min | 0.65% | B+ |
| Frontier Airlines (this page)thin sample | 173 | 76.2% | 53 min | 2.89% | B |
| Southwest Airlines | 1,149 | 72.3% | 56 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.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am37 flights89.2%
- 8am–11am50 flights76.6%
- 11am–2pm4 flights—
- 2pm–5pm61 flights72.1%
- 5pm–8pm21 flights—
- 8pm–5am—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 89.2% of the time, against 72.1% for the afternoon window. That is 17 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 61 flights scheduled in it.
Across the year
Frontier on LAS to PDX through the year
- Jul–Sep 202543 flights65.1%
- Oct–Dec 202542 flights69.0%
- Jan–Mar 202638 flights94.6%
- Apr–Jun 202650 flights78.3%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 76.2% on time across 173 flights.
Frontier on LAS to PDX did not run the same all year. Its best quarter was Jan–Mar 2026 at 94.6% on time and its weakest Jul–Sep 2025 at 65.1%, a swing of 30 points on roughly 43 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, Monday is the strongest day at 82.2% on time and Sunday the weakest at 73.3%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 2,110 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.
- 52%Late-arriving aircraft
- 30%Carrier
- 10%National Airspace System
- 7%Extreme weather
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 2,110 reported delay minutes here, that single category outweighs weather by 7 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 2,110 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 89.2% on time here.
Cancellations run at 2.89%, against 1.81% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
8.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 55 minutes, 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. 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 is a different operation and performs like one: it runs 72.3% on time across 172 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 173 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 Frontier on LAS to PDX
Put together: the delay figures matter less here than the 2.89% cancellation rate. A late arrival costs you roughly 55 minutes; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 168 completed flights over 12 months sit behind that.
Related
Where to go next
- LAS to PDX, every carrier
- Frontier on PDX to LAS, the return leg
- Spirit Airlines on LAS to PDX88.2%
- Alaska Airlines on LAS to PDX83.2%
- Southwest Airlines on LAS to PDX72.3%
- Frontier Airlines network-wide record
- Harry Reid International (LAS) delay statistics
- Portland International (PDX) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
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.