Carrier route record

F9PDX→LAS

Frontier Airlines · Portland to Las Vegas

Flights: 172
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 PDX to LAS sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land close to two hours behind schedule. That rests on 172 flights. The strongest carrier on the route with a full sample, Alaska Airlines, flew 1,534 at 82.7% on time.

The national on-time rate over the same period is 77.6%, so Frontier on PDX to LAS runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.

On time

72.3%

Arrivals under 15 minutes late, of 166 completed flights

Avg delay

101 min

Across delayed arrivals only, not all flights

Cancelled

3.49%

National rate is 1.81%

Whole route

80.2%

Every carrier on PDX to LAS, 2,983 flights

These figures cover 172 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% 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 PDX to LAS

Frontier flew 172 of the 2,983 flights on PDX to LAS, about 6% of it. Its 72.3% on time is 8 points worse than the route as a whole, which runs 80.2%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Spirit at 86.6% to Frontier at 72.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: 6 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

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	1,534	82.7%	51 min	0.52%	B+
Southwest Airlines	1,149	77.2%	46 min	0.17%	B+
Frontier Airlines (this page)thin sample	172	72.3%	101 min	3.49%	C−

No carrier stands out. Alaska tops the table at 82.7%, 6 points clear of the bottom, which is inside the range this kind of sample moves year to year.

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 13 points, against 6 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am7 flights—
11am–2pm88 flights78.8%
2pm–5pm8 flights—
5pm–8pm32 flights65.6%
8pm–5am37 flights77.1%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 11am–2pm slot at 78.8% on time, ahead of 5pm–8pm at 65.6%. 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. The 11am–2pm window is the busiest, with 88 flights scheduled in it.

Across the year

Frontier on PDX to LAS through the year

Jul–Sep 202542 flights65.9%
Oct–Dec 202542 flights66.7%
Jan–Mar 202638 flights73.0%
Apr–Jun 202650 flights82.6%

Scale runs 55% to 90%. 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 72.3% on time across 172 flights.

Frontier on PDX to LAS did not run the same all year. Its best quarter was Apr–Jun 2026 at 82.6% on time and its weakest Jul–Sep 2025 at 65.9%, a swing of 17 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.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. Carrier accounts for 57% of the 4,645 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.

Carrier
57%
Late-arriving aircraft
30%
National Airspace System
13%

The largest share of delay minutes, 57%, 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 2,655 of the 4,645 delay minutes reported here. The split is drawn from 4,645 reported delay minutes.

Cancellations run at 3.49%, against 1.81% nationally. That is about 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 76.2% on time across 173 flights, 4 points above 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. 172 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 PDX to LAS

Put together: the delay figures matter less here than the 3.49% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 166 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