Ontario, California (ONT) – San Francisco (SFO)
- Distance
- 585 km
- 363 mi · 316 nm
- Flight time
- 1 h 31 min / 1 h 26 min
- Average gate to gate: ONT → SFO / back
- Time difference
- none
- CO2 per passenger
- 74 kg
- One way, economy, incl. RF (43 kg CO2 only)
- Passengers / year
- 296,329
- Aug 2025 – Jul 2026 · −10.1%
- Flights / week
- 50
- Both directions, average
- Seats filled
- 72%
- 409,551 seats a year
- Airlines nonstop
- 3
- UA, F9, OO
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from ONT
- 314°
- Heading from SFO
- 131°
- Halfway point
- 35.86, -119.93
- Great-circle km
- 585 km (sphere, for EU261)
- In the air ONT → SFO
- 1 h
- In the air SFO → ONT
- 58 min
- Clocks
- Same time in both
The estimate for a route without real times is 1 h 30 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 29,272 |
| Sep 2025 | 29,774 |
| Oct 2025 | 32,812 |
| Nov 2025 | 27,966 |
| Dec 2025 | 22,971 |
| Jan 2026 | 15,958 |
| Feb 2026 | 17,040 |
| Mar 2026 | 23,277 |
| Apr 2026 | 24,101 |
| May 2026 | 25,781 |
| Jun 2026 | 23,805 |
| Jul 2026 | 23,572 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 216 |
| Sep 2025 | 216 |
| Oct 2025 | 229 |
| Nov 2025 | 207 |
| Dec 2025 | 206 |
| Jan 2026 | 184 |
| Feb 2026 | 160 |
| Mar 2026 | 204 |
| Apr 2026 | 250 |
| May 2026 | 251 |
| Jun 2026 | 240 |
| Jul 2026 | 248 |
Airlines flying ONT–SFO nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 38 | 77% |
| F9Frontier Airlines | 7.3 | 18% |
| OOSkyWest Airlines | 5.1 | 5% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Boeing B737 Max 900 · 531 flights
- Airbus Industrie A320-100/200 · 483 flights
- Boeing B737 Max 800 · 369 flights
- Boeing 737-800 · 324 flights
- Airbus Industrie A320-200n · 289 flights
- Embraer ERJ-175 · 225 flights
- Airbus Industrie A319 · 218 flights
- Airbus Industrie A321-200n · 60 flights
Also carried: 1 tonnes of freight and 0 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 69.3%
- Arrived within 15 min of schedule
- Average delay
- 21 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.9%
- Flights counted
- 2,619
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 75.5% | 16 min |
| F9Frontier Airlines | 47.5% | 42 min |
| OOSkyWest Airlines | 54.8% | 30 min |
Delay minutes by cause: airline 20% · aircraft arriving late 36% · air traffic system 41% · weather 3% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $211
- One way, all cabins
- Average over a year
- $153
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 87% of passengers · $223
- Lowest-fare airline
- Frontier Airlines
- 11% of passengers · $115
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $134 · Q3 2025 $137 · Q4 2025 $150 · Q1 2026 $211).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 585 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.