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Flight Reliability

UA 4645 · United Airlines

Chicago → FWA (ORD–FWA)83% of its flights flew this route. The rest (ATW–ORD, COS–DEN) are included in these numbers.

60
A Little Dicey
WanderNerd Reliability Score
69%
Arrive within 15 minutes
20 min
Average arrival delay
2.8%
Cancelled
2 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Monday is the weak spot.

UA 4645 arrived on time 72% of the time on Wednesdays. On Mondays: 64%.

A bit ahead of the ORD–FWA route.

UA 4645 arrived on time 69% of the time, versus 64% across the ORD–FWA route.

Lagging the United Airlines network.

UA 4645 arrived on time 69% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 4645 arrived on time 65% of the time over the last three months in the data, compared with 53% in the three months before that.

The breakdown

On-time by weekday
  • Mon64%(50 flights)
  • Tue69%(51 flights)
  • Wed72%(50 flights)
  • Thu71%(49 flights)
  • Fri65%(51 flights)
  • Sat72%(50 flights)
  • Sun71%(51 flights)
On-time by departure window
  • 6–9 AM71%(48 flights)
  • 9 AM–12 PM69%(292 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM—(2 flights)
On-time trend by month
60%
May

Jun 67% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202574%31
August 202593%30
September 202590%29
October 202581%31
November 202569%29
December 202541%27
January 202648%31
February 202670%27
March 202679%28
April 202655%29
May 202660%30
Departures on time
77%
Diverted
0.3%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.