San Diego (SAN) to Chicago (ORD) flights

United Airlines, American Airlines, Alaska Airlines fly nonstop from San Diego International Airport to Chicago O'Hare International Airport, with about 86 flights a week in July 2026. The 1,723-mile flight takes about 4h 10m gate to gate.

From

SAN

San Diego

San Diego International Airport

ORD

Chicago

Chicago O'Hare International Airport

Distance: 1,723 mi · 2,773 km
Flight time: 4h 10m
Airlines: 3
Seats filled: 82%

Flights a week, July 2026

3,772 flights and 556,900 passengers in 12 months

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

Airlines flying SAN to ORD

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
United Airlines	34	Airbus A321, Boeing 737-900ER, Boeing 737 MAX 9	259,396	4h 9m
American Airlines	33	Boeing 737-800, Airbus A321, Boeing 737 MAX 8	200,835	4h 9m
Alaska Airlines	19	Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800	92,487	4h 12m
Frontier AirlinesSeasonal or ended	n/a	Airbus A320neo, Airbus A321, Airbus A320-100/200	4,182	4h 14m

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

SAN to ORD flight schedule

20 flight numbers flew this route in August 2026, 12 of them almost daily. The first usually leaves at 6:15am and the last at 10:45pm. 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)
AA 518American Airlines	6:15am	12:50pm	31	90%
UA 1016United Airlines	6:18am	12:37pm	21	81%
UA 1069United Airlines	6:40am	1:09pm	10	90%
AS 1446Alaska Airlines	7:00am	1:21pm	31	72%
AA 3134American Airlines	7:24am	1:54pm	27	71%
AA 1261American Airlines	7:30am	1:59pm	4	86%
AA 2343American Airlines	9:48am	4:23pm	27	79%
AA 2484American Airlines	9:58am	4:30pm	4	78%
UA 1710United Airlines	10:40am	4:59pm	31	79%
AS 1478Alaska Airlines	12:40pm	6:57pm	28	57%
AA 811American Airlines	1:07pm	7:54pm	4	68%
AA 1160American Airlines	1:11pm	7:59pm	8	n/a
AA 2131American Airlines	1:11pm	7:59pm	19	68%
UA 1779United Airlines	2:15pm	8:36pm	31	65%
UA 2486United Airlines	4:08pm	10:14pm	31	79%
AS 1493Alaska Airlines	5:23pm	11:36pm	23	68%
UA 1457United Airlines	10:25pm	4:36am	10	91%
UA 1100United Airlines	10:40pm	4:43am	21	91%
AA 1543American Airlines	10:45pm	5:00am	4	91%
AA 2065American Airlines	10:45pm	5:02am	27	85%

Is SAN to ORD on time?

From September 2025 to August 2026, 78% of 3,944 flights arrived within 15 minutes of schedule and 1.3% were cancelled. Flights leaving around 10pm were the most punctual (93%), those around 2pm the least (65%). Most delay time was caused by air traffic control and airport congestion (36%).

Airline	Flights	On time	Average delay	Cancelled
United Airlines	1,677	80%	17 min	0.5%
American Airlines	1,400	80%	21 min	1.6%
Alaska Airlines	862	70%	20 min	2.6%

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	547	88%
7am to 8am	429	84%
8am to 9am	165	76%
10am to 11am	425	79%
12pm to 1pm	168	61%
1pm to 2pm	431	65%
2pm to 3pm	402	65%
3pm to 4pm	167	69%
4pm to 5pm	175	71%
5pm to 6pm	428	76%
10pm to 11pm	496	93%

Flights by month

Month	Flights	Passengers
August 2025	312	47,898
September 2025	269	39,881
October 2025	353	49,404
November 2025	305	42,145
December 2025	301	42,776
January 2026	242	34,449
February 2026	241	35,870
March 2026	313	48,627
April 2026	327	49,290
May 2026	359	49,067
June 2026	367	59,036
July 2026	384	58,714

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