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Flight Reliability

UA 5046 · United Airlines

JST → Washington (JST–IAD)81% of its flights flew this route. The rest (IAD–JST, DEN–LBL) are included in these numbers.

53
A Little Dicey
WanderNerd Reliability Score
73%
Arrive within 15 minutes
41 min
Average arrival delay
3.1%
Cancelled
8 min early
Median arrival delay

Based on 351 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

UA 5046 arrived on time 84% of the time on Saturdays and just 65% on Mondays. That gap is worth planning around.

A bit behind the United Airlines network.

UA 5046 arrived on time 73% of the time, versus 79% across the United Airlines network.

Keep a backup plan handy.

UA 5046 was cancelled 3.1% of the time. Typical for U.S. flights is around 1–2%.

Trending in the right direction.

UA 5046 arrived on time 72% of the time over the last three months in the data, compared with 62% in the three months before that.

The breakdown

On-time by weekday
  • Mon65%(48 flights)
  • Tue71%(44 flights)
  • Wed67%(51 flights)
  • Thu81%(52 flights)
  • Fri78%(50 flights)
  • Sat84%(45 flights)
  • Sun66%(50 flights)
On-time by departure window
  • 6–9 AM73%(273 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM72%(65 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
92%
May

Jun 53% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202590%31
August 202577%31
September 202587%30
October 202594%31
November 202567%30
December 202548%27
January 202675%28
February 202664%28
March 202657%28
April 202667%21
May 202692%25
Departures on time
77%
Diverted
0%
Flights flown
340
Months covered
12

Same route, other flights

Keep nerding

Based on 351 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.