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Route Reliability

Washington → SBN

IAD–SBN · 504 miles · Washington Dulles International Airport to SBN Airport

76
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
12 min
Average arrival delay
1.9%
Cancelled
366
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 366 flights. No comparison to make.

What the data says

The late departure is the smart one here.

IAD–SBN flights departing between 6–9 PM arrived on time 84% of the time, versus 77% between 3–6 PM.

Friday is doing you no favors.

IAD–SBN flights arrived on time 96% of the time on Tuesdays and just 69% on Fridays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon75%(52 flights)
  • Tue96%(50 flights)
  • Wed78%(50 flights)
  • Thu78%(51 flights)
  • Fri69%(51 flights)
  • Sat86%(51 flights)
  • Sun86%(50 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM77%(136 flights)
  • 6–9 PM84%(218 flights)
On-time trend by month
83%
May

Jun 57% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202559%27
August 202581%31
September 202587%30
October 202588%32
November 202583%29
December 202590%31
January 202673%30
February 202693%28
March 202689%27
April 202690%30
May 202683%30

Same trip, other airports

Keep nerding

Based on 366 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.