Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 2012 · United Airlines

Baltimore → Denver (BWI–DEN)90% of its flights flew this route. The rest (ONT–SFO) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
13 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 2012 departing between 6–9 AM arrived on time 89% of the time, versus 75% between 3–6 PM.

Thursdays have been rough.

UA 2012 arrived on time 86% of the time on Tuesdays and just 69% on Thursdays. That gap is worth planning around.

The breakdown

On-time by weekday
  • Mon75%(52 flights)
  • Tue86%(51 flights)
  • Wed73%(52 flights)
  • Thu69%(52 flights)
  • Fri75%(52 flights)
  • Sat81%(52 flights)
  • Sun78%(50 flights)
On-time by departure window
  • 6–9 AM89%(37 flights)
  • 3–6 PM75%(324 flights)
On-time trend by month
90%
May

Jun 48% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202545%29
August 202568%31
September 202583%30
October 202590%31
November 202590%30
December 202574%31
January 202683%30
February 202686%28
March 202668%31
April 202693%30
May 202690%31
Departures on time
84%
Diverted
0.5%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.