Carrier route record
F9ORD→LAS
Frontier Airlines · Chicago to Las Vegas
- Flights
- 186
- Period
- July 2025 to June 2026
- Share of route
- 4%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on ORD to LAS draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 186 flights. The strongest carrier on the route with a full sample, United Airlines, flew 2,328 at 79.6% on time.
United Airlines is the most reliable of the three carriers covered here at 79.6% on time across 2,328 flights.
Key figures
On time
58.3%
Arrivals under 15 minutes late, of 175 completed flights
Avg delay
124 min
Across delayed arrivals only, not all flights
Cancelled
5.91%
National rate is 1.81%
Whole route
73.7%
Every carrier on ORD to LAS, 5,297 flights
These figures cover 186 flights between July 2025 and June 2026. Beyond the headline rate, 18.3% 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 ORD to LAS
Frontier flew 186 of the 5,297 flights on ORD to LAS, about 4% of it. Its 58.3% on time is 15 points worse than the route as a whole, which runs 73.7%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from Spirit at 83.7% to Frontier at 58.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. United Airlines arrives on time 79.6% of the time; American Airlines manages 66.8%. Sample sizes sit next to every figure, because a two-point gap across 1,852 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 261 | 83.7% | 73 min | 1.15% | B |
| United Airlines | 2,328 | 79.6% | 64 min | 0.43% | B+ |
| Southwest Airlines | 670 | 72.1% | 69 min | 0.75% | C+ |
| American Airlines | 1,852 | 66.8% | 71 min | 2.21% | C |
| Frontier Airlines (this page)thin sample | 186 | 58.3% | 124 min | 5.91% | D− |
The spread between United and American is 13 points, wide enough that it should decide the booking. On a hundred trips that is 13 more arrivals inside the on-time window.
Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 186 flights.
There are not enough flights in each departure window to split Frontier's ORD to LAS record by time of day without the percentages moving on noise. The headline rate of 58.3% is the reliable figure here.
Across the year
Frontier on ORD to LAS through the year
- Jul–Sep 202543 flights60.0%
- Oct–Dec 202539 flights62.9%
- Jan–Mar 202654 flights56.9%
- Apr–Jun 202650 flights55.1%
Scale runs 45% to 70%. 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 58.3% on time across 186 flights.
Quarter by quarter Frontier on ORD to LAS held fairly steady: 60.0% in Jul–Sep 2025, 62.9% in Oct–Dec 2025, 56.9% in Jan–Mar 2026 and 55.1% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Sunday is the strongest day at 62.2% on time and Friday the weakest at 50.0%. 12 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 46% of the 9,069 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.
- 46%Late-arriving aircraft
- 42%Carrier
- 7%National Airspace System
- 5%Extreme weather
46% 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 9,069 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 9,069 reported delay minutes.
The largest share of delay minutes, 42%, 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 3,770 of the 9,069 delay minutes reported here.
Cancellations run at 5.91%, against 1.81% nationally. That is roughly one flight in fifteen 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. 18.3% 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.
At 1,514 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 68.6% on time across 184 flights, 10 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 10 points of difference.
One caution: this is a thin sample. 186 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 ORD to LAS
Put together: the delay figures matter less here than the 5.91% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8pm–5am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 175 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to LAS, every carrier
- Frontier on LAS to ORD, the return leg
- Spirit Airlines on ORD to LAS83.7%
- United Airlines on ORD to LAS79.6%
- Southwest Airlines on ORD to LAS72.1%
- American Airlines on ORD to LAS66.8%
- Frontier Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Harry Reid International (LAS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.