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Route Reliability

San Diego → Washington

SAN–IAD · 2,253 miles · San Diego International Airport to Washington Dulles International Airport

90
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
4 min early
Average arrival delay
0.6%
Cancelled
1,400
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines89%1,040 flights
  2. 2.Alaska Airlines86%360 flights

What the data says

The 12–3 PM departure wins.

SAN–IAD flights departing between 12–3 PM arrived on time 92% of the time, versus 84% between 9 AM–12 PM.

Sunday scaries are real for this one.

SAN–IAD flights arrived on time 93% of the time on Tuesdays. On Sundays: 84%.

United Airlines has a slight edge here.

United Airlines arrived on time 89% of the time on this route; Alaska Airlines managed 86%.

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%(197 flights)
  • Tue93%(193 flights)
  • Wed88%(199 flights)
  • Thu89%(203 flights)
  • Fri87%(207 flights)
  • Sat90%(178 flights)
  • Sun84%(202 flights)
On-time by departure window
  • 6–9 AM87%(409 flights)
  • 9 AM–12 PM84%(288 flights)
  • 12–3 PM92%(359 flights)
  • 9 PM–12 AM89%(323 flights)
On-time trend by month
90%
May

Jun 79% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%116
July 202578%120
August 202585%122
September 202595%117
October 202595%119
November 202585%114
December 202590%122
January 202689%107
February 202695%99
March 202681%113
April 202695%111
May 202690%119

Same trip, other airports

Keep nerding

Based on 1,400 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.