Denver International ⇄ San Diego International DEN–SAN
Airlines flew 11,981 flights between Denver International DEN in Denver, CO and San Diego International SAN in San Diego, CA in the twelve months to July 2026, both directions together: 1,660,667 passengers in 2,061,833 seats, 81% of them filled, and 627,399 pounds of freight. 853 miles, about 119 minutes in the air, on 12 airlines: Southwest Airlines Co. (4,732), United Air Lines Inc. (4,127), Frontier Airlines Inc. (1,392), Alaska Airlines Inc. (979) and 8 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 | 847 |
| 2/25 | 773 |
| 3/25 | 900 |
| 4/25 | 866 |
| 5/25 | 915 |
| 6/25 | 906 |
| 7/25 | 902 |
| 8/25 | 868 |
| 9/25 | 821 |
| 10/25 | 1,055 |
| 11/25 | 1,036 |
| 12/25 | 1,064 |
| 1/26 | 993 |
| 2/26 | 922 |
| 3/26 | 1,064 |
| 4/26 | 1,013 |
| 5/26 | 1,027 |
| 6/26 | 1,042 |
| 7/26 | 1,076 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 114,120 |
| 2/25 | 103,724 |
| 3/25 | 122,328 |
| 4/25 | 116,312 |
| 5/25 | 128,533 |
| 6/25 | 136,742 |
| 7/25 | 140,036 |
| 8/25 | 134,737 |
| 9/25 | 124,387 |
| 10/25 | 145,235 |
| 11/25 | 132,988 |
| 12/25 | 136,272 |
| 1/26 | 126,601 |
| 2/26 | 127,595 |
| 3/26 | 157,194 |
| 4/26 | 140,354 |
| 5/26 | 137,699 |
| 6/26 | 145,959 |
| 7/26 | 151,646 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 4,732 | 626,086 | 81% | scheduled passenger service |
| United Air Lines Inc. UA | 4,127 | 646,567 | 84% | charter passenger service, scheduled passenger service |
| Frontier Airlines Inc. F9 | 1,392 | 242,887 | 84% | scheduled passenger service |
| Alaska Airlines Inc. AS | 979 | 103,965 | 62% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 736 | 39,607 | 71% | scheduled passenger service |
| Delta Air Lines Inc. DL | 7 | 561 | 65% | charter passenger service, scheduled passenger service |
| JetBlue Airways B6 | 2 | 314 | 99% | scheduled passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 2 | 86 | 23% | charter passenger service |
| American Airlines Inc. AA | 1 | 182 | 93% | scheduled passenger service |
| Air Wisconsin Airlines Corp ZW | 1 | 29 | 58% | charter passenger service |
| Air Canada AC | 1 | 132 | 96% | scheduled passenger service |
| Lufthansa German Airlines LH | 1 | 251 | 94% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Airbus Industrie A321-200n | 2,234 | 207 | 389,048 |
| Boeing B737 Max 800 | 2,168 | 174 | 304,354 |
| Boeing 737-800 | 1,980 | 171 | 266,399 |
| Boeing 737-900ER | 1,576 | 179 | 219,464 |
| Boeing 737-700/700LR/Max 7 | 1,469 | 141 | 169,965 |
| Boeing B737 Max 900 | 891 | 179 | 120,134 |
| Embraer ERJ-175 | 736 | 76 | 39,607 |
| Airbus Industrie A320-200n | 674 | 186 | 105,961 |
| Airbus Industrie A321Neoxlr | 168 | 228 | 33,079 |
| Airbus Industrie A320-100/200 | 77 | 183 | 11,953 |
| Boeing 757-200 | 4 | 72 | 218 |
| Canadair RJ-200ER /RJ-440 | 1 | 50 | 29 |
| Airbus Industrie A350-900 | 1 | 267 | 251 |
| Boeing 757-300 | 1 | 234 | 73 |
| A220-300 BD-500-1A11 | 1 | 137 | 132 |
DEN → SAN this direction alone · flown January 2025 to July 2026
5,997 flights of 6,027 scheduled, 840,196 passengers in 1,031,281 seats, 245,252 pounds of freight, 176,314 pounds of mail. Southwest Airlines Co. 2,371; United Air Lines Inc. 2,064; Frontier Airlines Inc. 697; Alaska Airlines Inc. 488; SkyWest Airlines Inc. 368; Delta Air Lines Inc. 5; American Airlines Inc. 1; JetBlue Airways 1; Sun Country Airlines d/b/a MN Airlines 1; Air Wisconsin Airlines Corp 1.
SAN → DEN this direction alone · flown January 2025 to July 2026
5,984 flights of 6,027 scheduled, 820,471 passengers in 1,030,552 seats, 382,147 pounds of freight, 117,135 pounds of mail. Southwest Airlines Co. 2,361; United Air Lines Inc. 2,063; Frontier Airlines Inc. 695; Alaska Airlines Inc. 491; SkyWest Airlines Inc. 368; Delta Air Lines Inc. 2; Air Canada 1; JetBlue Airways 1; 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: Denver International DEN and San Diego International SAN; all routes.