Route Reliability
Chicago → Buffalo
ORD–BUF · 474 miles · Chicago O'Hare International Airport to Buffalo Niagara International Airport
- 72%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 2.8%
- Cancelled
- 2,539
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines73%1,308 flights
- 2.American Airlines71%1,231 flights
What the data says
Morning-you made the right choice.
ORD–BUF flights departing between 6–9 AM arrived on time 87% of the time, versus 44% between 9 PM–12 AM.
Sunday scaries are real for this one.
ORD–BUF flights arrived on time 76% of the time on Tuesdays. On Sundays: 66%.
Not much between United Airlines and American Airlines.
On this route they all land within 71% to 73% on time. Pick on schedule and price.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon72%(367 flights)
- Tue76%(353 flights)
- Wed72%(355 flights)
- Thu75%(366 flights)
- Fri69%(359 flights)
- Sat74%(310 flights)
- Sun66%(354 flights)
- 12–3 AM—(1 flights)
- 6–9 AM87%(474 flights)
- 9 AM–12 PM74%(535 flights)
- 12–3 PM75%(662 flights)
- 3–6 PM63%(119 flights)
- 6–9 PM59%(602 flights)
- 9 PM–12 AM44%(71 flights)
Jun 75% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 233 |
| July 2025 | 65% | 240 |
| August 2025 | 78% | 207 |
| September 2025 | 80% | 208 |
| October 2025 | 77% | 211 |
| November 2025 | 73% | 207 |
| December 2025 | 64% | 187 |
| January 2026 | 71% | 169 |
| February 2026 | 69% | 163 |
| March 2026 | 65% | 178 |
| April 2026 | 69% | 218 |
| May 2026 | 74% | 243 |
Same trip, other airports
Keep nerding
Based on 2,539 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.