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Flight Reliability

UA 3437 · United Airlines

Newark → Detroit (EWR–DTW)81% of its flights flew this route. The rest (EWR–MSY, BNA–EWR) are included in these numbers.

69
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
2 min
Average arrival delay
4.8%
Cancelled
13 min early
Median arrival delay

Based on 352 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 3437 departing between 3–6 PM arrived on time 84% of the time, versus 70% between 12–3 PM.

Thursday is the weak spot.

UA 3437 arrived on time 87% of the time on Tuesdays. On Thursdays: 77%.

Keep a backup plan handy.

UA 3437 was cancelled 4.8% of the time. Typical for U.S. flights is around 1–2%.

Ticking up lately.

UA 3437 arrived on time 91% of the time over the last three months in the data, compared with 87% in the three months before that.

The breakdown

On-time by weekday
  • Mon83%(46 flights)
  • Tue87%(47 flights)
  • Wed84%(49 flights)
  • Thu77%(48 flights)
  • Fri79%(48 flights)
  • Sat79%(47 flights)
  • Sun82%(49 flights)
On-time by departure window
  • 9 AM–12 PM—(3 flights)
  • 12–3 PM70%(47 flights)
  • 3–6 PM84%(273 flights)
  • 6–9 PM—(9 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
93%
May

Jun 58% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%19
July 202564%25
August 202574%31
September 202579%29
October 202574%31
November 202585%27
December 202579%28
January 202686%29
February 202696%25
March 202684%31
April 202697%30
May 202693%29
Departures on time
82%
Diverted
0.3%
Flights flown
334
Months covered
12

Same route, other flights

Keep nerding

Based on 352 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.