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Route Reliability

Buffalo → Chicago

BUF–ORD · 474 miles · Buffalo Niagara International Airport to Chicago O'Hare International Airport

65
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
20 min
Average arrival delay
2.8%
Cancelled
2,540
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.American Airlines77%1,232 flights
  2. 2.United Airlines71%1,308 flights

What the data says

Morning-you made the right choice.

BUF–ORD flights departing between 3–6 AM arrived on time 93% of the time, versus 54% between 3–6 PM.

Thursday has been the better bet.

A small edge: 78% on time on Thursdays against 72% on Sundays.

American Airlines has a slight edge here.

American Airlines arrived on time 77% of the time on this route; United Airlines managed 71%.

Trending in the right direction.

BUF–ORD flights arrived on time 76% of the time over the last three months in the data, compared with 67% in the three months before that.

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

On-time by weekday
  • Mon73%(368 flights)
  • Tue73%(357 flights)
  • Wed73%(353 flights)
  • Thu78%(360 flights)
  • Fri74%(360 flights)
  • Sat75%(311 flights)
  • Sun72%(357 flights)
On-time by departure window
  • 3–6 AM93%(57 flights)
  • 6–9 AM83%(713 flights)
  • 9 AM–12 PM87%(494 flights)
  • 12–3 PM71%(491 flights)
  • 3–6 PM54%(588 flights)
  • 6–9 PM69%(120 flights)
  • 9 PM–12 AM—(3 flights)
On-time trend by month
80%
May

Jun 78% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%231
July 202573%237
August 202576%208
September 202578%208
October 202577%212
November 202572%212
December 202563%188
January 202667%168
February 202670%165
March 202670%177
April 202677%215
May 202680%245

Same trip, other airports

Keep nerding

Based on 2,540 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.