Route
BUF → ORD
Buffalo Niagara International Airport Chicago O'Hare International Airport
How punctual is this route?
- On-time arrivals
- 74.4%
- Less than 15 minutes late
- Cancelled
- 3.1%
- Of scheduled flights
- Average delay when late
- 104 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,205
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 31%
- Air traffic control & airport 30%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 76.4% | 179 |
| October 2025 | 76.8% | 181 |
| November 2025 | 74.9% | 189 |
| December 2025 | 64.6% | 166 |
| January 2026 | 64.5% | 164 |
| February 2026 | 70.6% | 127 |
| March 2026 | 67.6% | 182 |
| April 2026 | 77.8% | 185 |
| May 2026 | 80.0% | 216 |
| June 2026 | 83.1% | 209 |
| July 2026 | 79.2% | 217 |
| August 2026 | 70.2% | 190 |
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 | 588 | 74.7% | 1.2% | 90 min |
| American Airlines | 478 | 82.2% | 2.7% | 131 min |
| Republic Airways | 427 | 78.0% | 3.0% | 97 min |
| SkyWest Airlines | 390 | 62.4% | 6.4% | 129 min |
| Envoy Air | 322 | 71.4% | 3.1% | 69 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AA1195
19% late · 164 flights
-
UA543
16% late · 161 flights
-
UA2747
42% late · 100 flights
-
AA2112
18% late · 75 flights
-
YX4413
5% late · 75 flights
-
MQ3410
19% late · 74 flights
-
OO4913
42% late · 73 flights
-
MQ3342
33% late · 51 flights
-
YX4349
42% late · 50 flights
-
UA705
13% late · 47 flights
-
AA2182
14% late · 44 flights
-
AA2359
25% late · 44 flights
-
AA2957
33% late · 44 flights
-
YX4423
19% late · 44 flights
-
AA3001
5% late · 43 flights
-
OO5820
11% late · 39 flights
-
UA228
28% late · 37 flights
-
MQ3703
20% late · 36 flights
-
OO5379
55% late · 36 flights
-
YX4595
14% late · 36 flights
-
MQ4183
28% late · 35 flights
-
OO4690
17% late · 35 flights
-
OO5322
16% late · 35 flights
-
AA1414
9% late · 33 flights
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