Dulles (IAD) to San Diego (SAN) flights

United Airlines, Alaska Airlines fly nonstop from Washington Dulles International Airport to San Diego International Airport, with about 27 flights a week in July 2026. The 2,253-mile flight takes about 5h 29m gate to gate.

From
IAD
Dulles
Washington Dulles International Airport
To
SAN
San Diego
San Diego International Airport
Distance
2,253 mi · 3,626 km
Flight time
5h 29m
Airlines
2
Seats filled
83%
Flights a week, July 2026
1,384 flights and 203,988 passengers in 12 months
SANSANIAD
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying IAD to SAN

AirlineFlights a weekAircraftPassengers (12 months)Flight time
United Airlines21Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737 MAX 8159,7255h 26m
Alaska Airlines7Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-80044,2635h 36m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

IAD to SAN flight schedule

4 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 8:55am and the last at 7:53pm. Times are local and can change; check with the airline before you book.

FlightDepartsArrivesDays flown in August 2026On time (12 months)
UA 1930United Airlines8:55am11:17am3194%
UA 2163United Airlines12:35pm2:57pm3183%
UA 2054United Airlines6:00pm8:29pm3181%
AS 201Alaska Airlines7:53pm10:17pm2872%

Is IAD to SAN on time?

From September 2025 to August 2026, 83% of 1,402 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 9am were the most punctual (95%), those around 7pm the least (64%). Most delay time was caused by air traffic control and airport congestion (41%).

AirlineFlightsOn timeAverage delayCancelled
United Airlines1,04186%10 min0.7%
Alaska Airlines36173%14 min0.8%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departureFlightsOn time, relativeOn time
8am to 9am160
93%
9am to 10am175
95%
12pm to 1pm345
85%
5pm to 6pm369
81%
6pm to 7pm223
76%
7pm to 8pm101
64%

Flights by month

MonthFlightsFlights, relativePassengers
August 2025123
17,679
September 2025116
15,765
October 2025116
17,292
November 2025115
16,103
December 2025120
17,697
January 2026107
14,633
February 2026100
14,214
March 2026116
17,587
April 2026110
16,743
May 2026120
17,602
June 2026120
19,207
July 2026121
19,466

Related

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.