Ontario International ⇄ San Francisco International ONT–SFO
Airlines flew 2,618 flights between Ontario International ONT in Ontario, CA and San Francisco International SFO in San Francisco, CA in the twelve months to July 2026, both directions together: 296,329 passengers in 409,750 seats, 72% of them filled, and 15,933 pounds of freight. 363 miles, about 60 minutes in the air, on 7 airlines: United Air Lines Inc. (1,959), Frontier Airlines Inc. (381), SkyWest Airlines Inc. (267), Air Transport International (6) and 3 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 | 203 |
| 2/25 | 204 |
| 3/25 | 229 |
| 4/25 | 306 |
| 5/25 | 263 |
| 6/25 | 207 |
| 7/25 | 208 |
| 8/25 | 218 |
| 9/25 | 217 |
| 10/25 | 229 |
| 11/25 | 208 |
| 12/25 | 206 |
| 1/26 | 184 |
| 2/26 | 160 |
| 3/26 | 204 |
| 4/26 | 252 |
| 5/26 | 252 |
| 6/26 | 240 |
| 7/26 | 248 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 21,915 |
| 2/25 | 21,637 |
| 3/25 | 23,387 |
| 4/25 | 27,933 |
| 5/25 | 33,242 |
| 6/25 | 30,106 |
| 7/25 | 29,935 |
| 8/25 | 29,272 |
| 9/25 | 29,774 |
| 10/25 | 32,812 |
| 11/25 | 27,966 |
| 12/25 | 22,971 |
| 1/26 | 15,958 |
| 2/26 | 17,040 |
| 3/26 | 23,277 |
| 4/26 | 24,101 |
| 5/26 | 25,781 |
| 6/26 | 23,805 |
| 7/26 | 23,572 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 1,959 | 228,275 | 72% | scheduled passenger service |
| Frontier Airlines Inc. F9 | 381 | 52,590 | 72% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 267 | 15,204 | 79% | scheduled passenger service |
| Air Transport International 8C | 6 | 0 | charter cargo service | |
| Horizon Air QX | 2 | 124 | 82% | scheduled passenger service |
| Southwest Airlines Co. WN | 2 | 136 | 50% | scheduled passenger service |
| Delta Air Lines Inc. DL | 1 | 0 | 0% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 900 | 531 | 179 | 56,393 |
| Airbus Industrie A320-100/200 | 483 | 152 | 58,806 |
| Boeing B737 Max 800 | 369 | 166 | 45,880 |
| Boeing 737-800 | 324 | 166 | 42,071 |
| Airbus Industrie A320-200n | 289 | 186 | 40,302 |
| Embraer ERJ-175 | 225 | 73 | 12,712 |
| Airbus Industrie A319 | 218 | 126 | 21,644 |
| Airbus Industrie A321-200n | 60 | 217 | 7,968 |
| Boeing 737-900ER | 58 | 179 | 6,324 |
| Canadair RJ-700 | 44 | 70 | 2,616 |
| Airbus Industrie A321Neoxlr | 8 | 230 | 1,477 |
| Boeing 767-300/300ER | 6 | 0 | 0 |
| Boeing 737-700/700LR/Max 7 | 2 | 137 | 136 |
| Boeing 757-200 | 1 | 199 | 0 |
ONT → SFO this direction alone · flown January 2025 to July 2026
1,302 flights of 1,303 scheduled, 147,955 passengers in 203,650 seats, 2,674 pounds of freight. United Air Lines Inc. 977; Frontier Airlines Inc. 191; SkyWest Airlines Inc. 131; Air Transport International 2; Delta Air Lines Inc. 1.
SFO → ONT this direction alone · flown January 2025 to July 2026
1,316 flights of 1,308 scheduled, 148,374 passengers in 206,100 seats, 13,259 pounds of freight. United Air Lines Inc. 982; Frontier Airlines Inc. 190; SkyWest Airlines Inc. 136; Air Transport International 4; Horizon Air 2; Southwest Airlines Co. 2.
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: Ontario International ONT and San Francisco International SFO; all routes.