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Flight Reliability

UA 1155 · United Airlines

Newark → Austin (EWR–AUS)80% of its flights flew this route. The rest (RDU–EWR, IAD–EWR) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
1 min
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 357 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 1155 departing between 9 AM–12 PM arrived on time 87% of the time, versus 76% between 12–3 PM.

Skip Saturday if you can.

UA 1155 arrived on time 90% of the time on Wednesdays. On Saturdays: 77%.

A bit ahead of the EWR–AUS route.

UA 1155 arrived on time 83% of the time, versus 79% across the EWR–AUS route.

A bit ahead of the United Airlines network.

UA 1155 arrived on time 83% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(51 flights)
  • Tue90%(51 flights)
  • Wed90%(52 flights)
  • Thu78%(50 flights)
  • Fri81%(52 flights)
  • Sat77%(43 flights)
  • Sun80%(50 flights)
On-time by departure window
  • 6–9 AM86%(58 flights)
  • 9 AM–12 PM87%(171 flights)
  • 12–3 PM76%(120 flights)
On-time trend by month
93%
May

Jun 62% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202583%30
August 202587%31
September 2025100%30
October 202577%31
November 202571%28
December 202577%31
January 202676%29
February 202692%26
March 202684%31
April 202692%25
May 202693%28
Departures on time
85%
Diverted
0.3%
Flights flown
349
Months covered
12

Same route, other flights

Keep nerding

Based on 357 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.