Las Vegas (LAS) to Chicago (ORD): On-Time Performance
Data through July 2026
Las Vegas (LAS) to Chicago (ORD) effectively runs on two schedules. In November 2024, 90% of arrivals were on time; in July 2024 that fell to 65% — a 24-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 14
- last 12 months
- Duration
- 3h 45m
- scheduled
- Distance
- 1,514 mi
Best airline from LAS to ORD
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 82% | 13 min | 1.0% | 1,037 |
| United Airlines | 82% | 14 min | 0.7% | 4,741 |
| American Airlines | 77% | 22 min | 1.6% | 3,661 |
| Southwest Airlines | 72% | 17 min | 0.4% | 1,135 |
| Frontier Airlines | 65% | 29 min | 3.6% | 418 |
Monthly on-time trend
Best time to fly from LAS to ORD
Aim for departures around 6 a.m. (93% on-time); avoid 12 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 23 min |
| Tuesdaybest | 84% | 10 min |
| Wednesday | 81% | 14 min |
| Thursday | 76% | 18 min |
| Friday | 74% | 20 min |
| Saturday | 82% | 18 min |
| Sunday | 77% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations31%
- National airspace system26%
- Weather1%
Frequently asked questions
- How often are flights from LAS to ORD delayed?
- 22% of LAS–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from LAS to ORD?
- Spirit Airlines has the best on-time record on this route at 82%, based on 1,037 flights. 5 airlines flew LAS–ORD frequently enough to compare in this period.
- What is the best time of day to fly from LAS to ORD?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 12 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to ORD?
- The scheduled LAS–ORD flight time averages 3h 45m over 1,514 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are LAS to ORD flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to ORD?
- July 2024 was the roughest month in this dataset, with only 65% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 24-point gap is worth planning around.
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Based on 10,992 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.