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Route Reliability

Washington → Boston

IAD–BOS · 412 miles · Washington Dulles International Airport to Boston Logan International Airport

76
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
12 min
Average arrival delay
1.7%
Cancelled
1,487
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 76% of the time across 1,487 flights. No comparison to make.

What the data says

Morning-you made the right choice.

IAD–BOS flights departing between 6–9 AM arrived on time 92% of the time, versus 58% between 3–6 PM.

Skip Monday if you can.

IAD–BOS flights arrived on time 84% of the time on Saturdays. On Mondays: 72%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon72%(209 flights)
  • Tue76%(203 flights)
  • Wed78%(205 flights)
  • Thu73%(211 flights)
  • Fri79%(215 flights)
  • Sat84%(207 flights)
  • Sun73%(212 flights)
On-time by departure window
  • 6–9 AM92%(233 flights)
  • 9 AM–12 PM92%(107 flights)
  • 12–3 PM80%(362 flights)
  • 3–6 PM58%(411 flights)
  • 9 PM–12 AM79%(349 flights)
On-time trend by month
81%
May

Jun 63% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%145
July 202571%122
August 202581%134
September 202559%140
October 202576%123
November 202578%117
December 202578%122
January 202689%104
February 202686%95
March 202680%117
April 202683%120
May 202681%123

Same trip, other airports

Keep nerding

Based on 1,487 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.