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Flight Reliability

UA 1559 · United Airlines

Santa Ana → Newark (SNA–EWR)93% of its flights flew this route. The rest (DEN–MTJ) are included in these numbers.

43
Bring Snacks
WanderNerd Reliability Score
58%
Arrive within 15 minutes
38 min
Average arrival delay
1.4%
Cancelled
5 min
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 1559 departing between 12–3 PM arrived on time 59% of the time, versus 44% between 6–9 PM.

Skip Thursday if you can.

UA 1559 arrived on time 63% of the time on Mondays. On Thursdays: 52%.

Well behind the SNA–EWR route.

UA 1559 arrived on time 58% of the time, versus 79% across the SNA–EWR route.

Well behind the United Airlines network.

UA 1559 arrived on time 58% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon63%(51 flights)
  • Tue60%(52 flights)
  • Wed59%(51 flights)
  • Thu52%(50 flights)
  • Fri60%(52 flights)
  • Sat55%(51 flights)
  • Sun55%(49 flights)
On-time by departure window
  • 12–3 PM59%(331 flights)
  • 6–9 PM44%(25 flights)
On-time trend by month
90%
May

Jun 37% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202537%30
July 202540%30
August 202542%31
September 202572%29
October 202542%31
November 202546%28
December 202555%31
January 202657%30
February 202673%26
March 202652%29
April 202687%30
May 202690%31
Departures on time
58%
Diverted
0.8%
Flights flown
356
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.