Seattle (SEA) to San Diego (SAN) flights

Alaska Airlines, Delta Air Lines, Southwest Airlines fly nonstop from Seattle-Tacoma International Airport to San Diego International Airport, with about 102 flights a week in July 2026. The 1,050-mile flight takes about 2h 49m gate to gate.

From

SEA

Seattle

Seattle-Tacoma International Airport

SAN

San Diego

San Diego International Airport

Distance: 1,050 mi · 1,690 km
Flight time: 2h 49m
Airlines: 3
Seats filled: 82%

Flights a week, July 2026

4,536 flights and 613,573 passengers in 12 months

Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying SEA to SAN

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
Alaska Airlines	62	Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800	393,930	2h 49m
Delta Air Lines	33	Boeing 737-800, Airbus A220-300, Airbus A220-100	199,135	2h 49m
Southwest Airlines	7	Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800	20,508	2h 45m

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

SEA to SAN flight schedule

26 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 6:21am and the last at 8:49pm. Times are local and can change; check with the airline before you book.

Flight	Departs	Arrives	Days flown in August 2026	On time (12 months)
AS 1361Alaska Airlines	6:21am	9:10am	18	89%
DL 2508Delta Air Lines	7:15am	10:11am	31	90%
AS 1471Alaska Airlines	7:26am	10:23am	18	71%
AS 1367Alaska Airlines	7:40am	10:39am	13	88%
AS 650Alaska Airlines	8:48am	11:45am	13	78%
WN 3409Southwest Airlines	9:05am	11:50am	4	n/a
DL 2533Delta Air Lines	9:45am	12:39pm	31	77%
AS 467Alaska Airlines	10:03am	1:01pm	18	59%
AS 697Alaska Airlines	10:18am	1:19pm	13	77%
AS 1346Alaska Airlines	11:26am	2:18pm	18	53%
AS 621Alaska Airlines	11:41am	2:44pm	13	78%
DL 2572Delta Air Lines	12:14pm	3:16pm	31	82%
AS 765Alaska Airlines	2:18pm	5:13pm	13	76%
AS 1432Alaska Airlines	2:23pm	5:17pm	15	70%
DL 2613Delta Air Lines	3:15pm	6:05pm	26	83%
AS 1348Alaska Airlines	4:45pm	7:36pm	18	54%
AS 635Alaska Airlines	4:52pm	7:47pm	15	56%
WN 2623Southwest Airlines	5:30pm	8:20pm	28	29%
WN 3538Southwest Airlines	5:50pm	8:45pm	24	46%
AS 1388Alaska Airlines	5:53pm	8:49pm	17	46%
AS 247Alaska Airlines	5:59pm	8:54pm	13	46%
AS 336Alaska Airlines	7:06pm	10:07pm	16	36%
AS 254Alaska Airlines	7:50pm	10:45pm	8	59%
DL 2672Delta Air Lines	7:55pm	10:49pm	31	74%
AS 1398Alaska Airlines	8:25pm	11:21pm	13	63%
AS 604Alaska Airlines	8:49pm	11:44pm	13	85%

Is SEA to SAN on time?

From September 2025 to August 2026, 75% of 4,648 flights arrived within 15 minutes of schedule and 0.9% were cancelled. Flights leaving around 7am were the most punctual (88%), those around 7pm the least (69%). Most delay time was caused by air traffic control and airport congestion (36%).

Airline	Flights	On time	Average delay	Cancelled
Alaska Airlines	2,730	73%	13 min	1%
Delta Air Lines	1,710	81%	11 min	0.9%
Southwest Airlines	208	47%	26 min	0%

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 departure	Flights	On time
6am to 7am	96	87%
7am to 8am	642	88%
9am to 10am	474	74%
10am to 11am	300	78%
11am to 12pm	496	73%
12pm to 1pm	198	85%
1pm to 2pm	191	73%
2pm to 3pm	300	73%
3pm to 4pm	408	78%
4pm to 5pm	306	69%
5pm to 6pm	191	51%
6pm to 7pm	165	65%
7pm to 8pm	562	69%
8pm to 9pm	201	77%
9pm to 10pm	97	81%

Flights by month

Month	Flights	Passengers
August 2025	419	62,645
September 2025	378	48,611
October 2025	337	45,098
November 2025	319	40,075
December 2025	351	45,841
January 2026	330	41,692
February 2026	305	41,120
March 2026	381	49,043
April 2026	410	55,076
May 2026	423	55,471
June 2026	434	59,890
July 2026	453	69,103

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