Route
ORD → LAS
Chicago O'Hare International Airport Harry Reid International Airport
How punctual is this route?
- On-time arrivals
- 72.9%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5,154
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 47%
- Airline (crew, maintenance, cleaning) 27%
- Air traffic control & airport 20%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 79.2% | 481 |
| October 2025 | 75.6% | 484 |
| November 2025 | 80.5% | 389 |
| December 2025 | 69.5% | 358 |
| January 2026 | 73.7% | 360 |
| February 2026 | 82.6% | 392 |
| March 2026 | 72.4% | 487 |
| April 2026 | 64.5% | 508 |
| May 2026 | 72.0% | 482 |
| June 2026 | 68.0% | 396 |
| July 2026 | 71.8% | 419 |
| August 2026 | 65.6% | 398 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 2,354 | 79.5% | 0.3% | 72 min |
| American Airlines | 1,897 | 64.9% | 2.2% | 74 min |
| Southwest Airlines | 551 | 73.4% | 0.7% | 72 min |
| Frontier Airlines | 215 | 60.7% | 6.5% | 158 min |
| NK | 137 | 85.8% | 2.2% | 95 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA777
25% late · 364 flights
-
UA574
3% late · 290 flights
-
UA2440
16% late · 271 flights
-
AA3323
44% late · 247 flights
-
UA1875
26% late · 235 flights
-
F92145
37% late · 190 flights
-
UA1933
21% late · 178 flights
-
AA3292
51% late · 138 flights
-
AA1393
41% late · 106 flights
-
UA215
21% late · 101 flights
-
AA2254
29% late · 92 flights
-
AA2311
29% late · 88 flights
-
UA2137
17% late · 87 flights
-
UA2684
19% late · 84 flights
-
AA1465
52% late · 76 flights
-
AA2020
13% late · 76 flights
-
AA2877
35% late · 76 flights
-
AA1105
27% late · 66 flights
-
AA1880
56% late · 66 flights
-
AA2016
26% late · 65 flights
-
WN2723
19% late · 64 flights
-
WN1573
22% late · 58 flights
-
WN4283
16% late · 58 flights
-
WN4646
9% late · 57 flights
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