United Airlines BUF to ORD on-time performance
United Airlines nonstop flights from Buffalo to Chicago · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.3%
8 flights
Avg arrival delay
24 min
91 min when late
Rank on route
#3 of 5
route average 75% on time
Key facts
- United Airlines flights on BUF to ORD arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 9% arrived an hour or more late.
- That ranks #3 of 5 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (39%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion39%
- Airline (crew, maintenance, cleaning, fueling)35%
- Late-arriving aircraft21%
- Extreme weather4%
- Security0%
Other airlines on BUF to ORD
- American Airlines84% on time · 19 min avg delay
- SkyWest Airlines62% on time · 50 min avg delay
- Envoy Air71% on time · 21 min avg delay
- Republic Airways78% on time · 22 min avg delay
Full BUF to ORD comparison →
United Airlines on-time record across all routes →
593 United Airlines flights tracked on this route; 8 cancelled, 0 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.