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Flight Reliability

UA 4970 · United Airlines

Albany → Washington (ALB–IAD)

80
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
6 min
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 342 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

UA 4970 departing between 6–9 AM arrived on time 86% of the time, versus 75% between 3–6 AM.

Tuesdays have been rough.

UA 4970 arrived on time 93% of the time on Wednesdays and just 73% on Tuesdays. That gap is worth planning around.

Better than the ALB–IAD route average.

UA 4970 arrived on time 82% of the time, versus 71% across the ALB–IAD route.

Trending in the right direction.

UA 4970 arrived on time 85% of the time over the last three months in the data, compared with 67% in the three months before that.

The breakdown

On-time by weekday
  • Mon79%(48 flights)
  • Tue73%(45 flights)
  • Wed93%(45 flights)
  • Thu89%(47 flights)
  • Fri77%(51 flights)
  • Sat81%(47 flights)
  • Sun80%(51 flights)
On-time by departure window
  • 3–6 AM75%(126 flights)
  • 6–9 AM86%(208 flights)
On-time trend by month
94%
May

Jun 86% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%28
July 202568%31
August 202590%31
September 202586%29
October 202584%31
November 202593%29
December 202576%29
January 202654%13
February 202671%21
March 202674%31
April 202687%30
May 202694%31
Departures on time
85%
Diverted
0.6%
Flights flown
334
Months covered
12

Same route, other flights

Keep nerding

Based on 342 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.