Chicago O'Hare International ⇄ San Diego International ORD–SAN
Airlines flew 7,595 flights between Chicago O'Hare International ORD in Chicago, IL and San Diego International SAN in San Diego, CA in the twelve months to July 2026, both directions together: 1,117,940 passengers in 1,372,969 seats, 81% of them filled, and 349,668 pounds of freight. 1,723 miles, about 231 minutes in the air, on 8 airlines: United Air Lines Inc. (3,311), American Airlines Inc. (2,710), Alaska Airlines Inc. (1,506), Frontier Airlines Inc. (61) and 4 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 376 |
| 2/25 | 335 |
| 3/25 | 455 |
| 4/25 | 525 |
| 5/25 | 552 |
| 6/25 | 628 |
| 7/25 | 661 |
| 8/25 | 630 |
| 9/25 | 539 |
| 10/25 | 706 |
| 11/25 | 611 |
| 12/25 | 603 |
| 1/26 | 485 |
| 2/26 | 483 |
| 3/26 | 636 |
| 4/26 | 659 |
| 5/26 | 723 |
| 6/26 | 744 |
| 7/26 | 776 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 57,730 |
| 2/25 | 48,974 |
| 3/25 | 65,645 |
| 4/25 | 72,250 |
| 5/25 | 77,556 |
| 6/25 | 94,955 |
| 7/25 | 102,574 |
| 8/25 | 96,676 |
| 9/25 | 80,666 |
| 10/25 | 100,026 |
| 11/25 | 84,711 |
| 12/25 | 86,838 |
| 1/26 | 69,072 |
| 2/26 | 72,791 |
| 3/26 | 98,727 |
| 4/26 | 96,324 |
| 5/26 | 99,505 |
| 6/26 | 114,174 |
| 7/26 | 118,430 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 3,311 | 519,401 | 83% | scheduled passenger service |
| American Airlines Inc. AA | 2,710 | 403,888 | 86% | scheduled passenger service |
| Alaska Airlines Inc. AS | 1,506 | 185,185 | 72% | scheduled passenger service |
| Frontier Airlines Inc. F9 | 61 | 8,625 | 68% | scheduled passenger service |
| Delta Air Lines Inc. DL | 4 | 476 | 63% | charter passenger service |
| Breeze Aviation Group DBA Breeze MX | 1 | 52 | 48% | charter passenger service |
| Lufthansa German Airlines LH | 1 | 257 | 96% | scheduled passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 1 | 56 | 30% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 2,857 | 169 | 405,133 |
| Airbus Industrie A321-200n | 1,937 | 200 | 324,843 |
| Boeing 737-900ER | 1,168 | 179 | 159,860 |
| Boeing B737 Max 900 | 874 | 178 | 116,689 |
| Boeing B737 Max 800 | 350 | 169 | 47,422 |
| Airbus Industrie A321Neoxlr | 325 | 190 | 52,284 |
| Boeing 757-200 | 41 | 177 | 5,612 |
| Airbus Industrie A320-200n | 33 | 186 | 4,657 |
| Airbus Industrie A320-100/200 | 6 | 160 | 903 |
| Embraer 190 | 1 | 108 | 52 |
| Airbus Industrie A350-900 | 1 | 267 | 257 |
| Boeing 737-700/700LR/Max 7 | 1 | 126 | 69 |
| Boeing 737-900 | 1 | 179 | 159 |
ORD → SAN this direction alone · flown January 2025 to July 2026
3,818 flights of 3,868 scheduled, 560,398 passengers in 689,993 seats, 75,715 pounds of freight, 222,341 pounds of mail. United Air Lines Inc. 1,662; American Airlines Inc. 1,363; Alaska Airlines Inc. 759; Frontier Airlines Inc. 31; Delta Air Lines Inc. 2; Breeze Aviation Group DBA Breeze 1.
SAN → ORD this direction alone · flown January 2025 to July 2026
3,777 flights of 3,860 scheduled, 557,542 passengers in 682,976 seats, 273,953 pounds of freight, 96,985 pounds of mail. United Air Lines Inc. 1,649; American Airlines Inc. 1,347; Alaska Airlines Inc. 747; Frontier Airlines Inc. 30; Delta Air Lines Inc. 2; Lufthansa German Airlines 1; Sun Country Airlines d/b/a MN Airlines 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Chicago O'Hare International ORD and San Diego International SAN; all routes.