United Airlines ORD to BUF on-time performance
United Airlines nonstop flights from Chicago to Buffalo · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.2%
7 flights
Avg arrival delay
21 min
81 min when late
Rank on route
#3 of 5
route average 71% on time
Key facts
- United Airlines flights on ORD to BUF arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1.2% were cancelled, and 10% arrived an hour or more late.
- That ranks #3 of 5 airlines on this route, which averaged 71% on time overall.
- The largest source of delay minutes was late-arriving aircraft (43%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion14%
- Extreme weather10%
- Security0%
Other airlines on ORD to BUF
- American Airlines60% on time · 35 min avg delay
- SkyWest Airlines65% on time · 28 min avg delay
- Republic Airways76% on time · 19 min avg delay
- Envoy Air80% on time · 13 min avg delay
Full ORD to BUF comparison →
United Airlines on-time record across all routes →
592 United Airlines flights tracked on this route; 7 cancelled, 1 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.