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Flight Reliability

UA 3709 · United Airlines

Indianapolis → Washington (IND–IAD)84% of its flights flew this route. The rest (IAD–PIT, PWM–IAD) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
6 min early
Average arrival delay
1.1%
Cancelled
12 min early
Median arrival delay

Based on 353 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 3709 departing between 12–3 PM arrived on time 100% of the time, versus 80% between 6–9 AM.

Tuesday is the weak spot.

UA 3709 arrived on time 98% of the time on Mondays. On Tuesdays: 88%.

A bit ahead of the IND–IAD route.

UA 3709 arrived on time 91% of the time, versus 86% across the IND–IAD route.

Better than the United Airlines network average.

UA 3709 arrived on time 91% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon98%(52 flights)
  • Tue88%(50 flights)
  • Wed92%(50 flights)
  • Thu92%(50 flights)
  • Fri89%(54 flights)
  • Sat90%(40 flights)
  • Sun89%(52 flights)
On-time by departure window
  • 6–9 AM80%(15 flights)
  • 9 AM–12 PM91%(292 flights)
  • 12–3 PM100%(18 flights)
  • 3–6 PM94%(17 flights)
  • 6–9 PM—(6 flights)
On-time trend by month
98%
May

Jun 93% → May 98% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202594%31
August 202587%31
September 2025100%29
October 202596%25
November 2025100%27
December 202581%31
January 202686%29
February 202692%25
March 202680%25
April 202682%22
May 202698%43
Departures on time
92%
Diverted
0.3%
Flights flown
348
Months covered
12

Same route, other flights

Keep nerding

Based on 353 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.