Skip to content
WanderNerd
Check a flight

Route Reliability

Raleigh–Durham → Washington

RDU–IAD · 225 miles · Raleigh–Durham International Airport to Washington Dulles International Airport

88
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
2 min
Average arrival delay
1.7%
Cancelled
1,511
Flights in the data

Data through May 2026.

Airlines on this route

  • United Airlines87% on time · 1,510 flights
  • Delta Air Lines100% on time · 1 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

Morning flights do better here.

RDU–IAD flights departing between 9 AM–12 PM arrived on time 95% of the time, versus 78% between 3–6 PM.

Sunday scaries are real for this one.

RDU–IAD flights arrived on time 91% of the time on Saturdays. On Sundays: 83%.

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
  • Mon85%(209 flights)
  • Tue88%(212 flights)
  • Wed87%(216 flights)
  • Thu88%(210 flights)
  • Fri86%(211 flights)
  • Sat91%(214 flights)
  • Sun83%(213 flights)
On-time by departure window
  • 6–9 AM91%(355 flights)
  • 9 AM–12 PM95%(363 flights)
  • 12–3 PM89%(89 flights)
  • 3–6 PM78%(357 flights)
  • 6–9 PM83%(321 flights)
On-time trend by month
89%
May

Jun 80% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%142
July 202584%143
August 202586%136
September 202594%142
October 202589%124
November 202586%117
December 202582%124
January 202685%92
February 202692%99
March 202683%123
April 202693%120
May 202689%123

Same trip, other airports

Keep nerding

Based on 1,511 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.