Ontario (ONT) to San Francisco (SFO)
Flight time
≈ 1h 32m
Bearing
314° NW
Ontario (ONT) to San Francisco (SFO) is 363 miles (585 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies ONT–SFO
US DOT T-100 · filed dataIn April 2026, United Airlines operated the most departures, one of 4 carriers flying nonstop ONT–SFO; the Boeing 737 MAX 8 was the most common aircraft at 28% of departures; flights ran 59% full.
Departures
251
April 2026
Seats
40,616
both directions
Passengers
24,101
both directions
Load factor
59.3%
passengers ÷ seats
Who flies ONT–SFO?
United Airlines operated the most nonstop ONT–SFO departures in April 2026 (216), one of 4 carriers on the route.
- UA
United Airlines
216 departures · 34,781 seats
Share of departures86.1%61.2%
Load
- F9
Frontier Airlines
26 departures · 5,052 seats
Share of departures10.4%50.2%
Load
- OO
SkyWest Airlines
8 departures · 584 seats
Share of departures3.2%49.0%
Load
- DL
Delta Air Lines
1 departures · 199 seats
Share of departures0.4%0.0%
Load
What plane flies ONT–SFO?
In April 2026, the Boeing 737 MAX 8 flew 28% of ONT–SFO departures — more than any other aircraft type.
- Boeing 737 MAX 8
71 departures · 64.7% load
28.3% - Boeing 737 MAX 9
59 departures · 56.1% load
23.5% - Airbus A319
36 departures · 64.1% load
14.3% - Airbus A320
32 departures · 57.9% load
12.8% - Airbus A320neo
20 departures · 52.2% load
8.0% - Boeing 737-800
14 departures · 66.6% load
5.6% - Embraer E175
8 departures · 49.0% load
3.2% - Boeing 737-900ER
6 departures · 56.0% load
2.4% - Airbus A321neo
4 departures · 46.5% load
1.6% - Boeing 757-200
1 departures · 0.0% load
0.4%
How has ONT–SFO traffic changed?
Nonstop ONT–SFO departures fell from 262 in May 2025 to 251 in April 2026.
Monthly nonstop ONT–SFO traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
262 departures · 33,242 passengers
91.4%
Load
June 2025
207 departures · 30,106 passengers
93.4%
Load
July 2025
208 departures · 29,935 passengers
91.4%
Load
August 2025
216 departures · 29,272 passengers
87.0%
Load
September 2025
216 departures · 29,774 passengers
87.7%
Load
October 2025
229 departures · 32,812 passengers
88.0%
Load
November 2025
207 departures · 27,966 passengers
81.0%
Load
December 2025
206 departures · 22,971 passengers
80.6%
Load
January 2026
184 departures · 15,958 passengers
57.6%
Load
February 2026
160 departures · 17,040 passengers
67.6%
Load
March 2026
204 departures · 23,277 passengers
72.9%
Load
April 2026
251 departures · 24,101 passengers
59.3%
Load
By direction
The DOT files each direction separately — they rarely match.
ONT → SFO
57.3% full
126 departures · 11,626 passengers
SFO → ONT
61.4% full
125 departures · 12,475 passengers
Nonstop ONT–SFO traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Ontario (ONT) from San Francisco (SFO)?
ONT to SFO is 363 miles (585 km / 316 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from ONT to SFO?
A nonstop covers the 363-mile great-circle distance in roughly 1h 32m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies ONT–SFO?
In April 2026, the Boeing 737 MAX 8 flew the largest share of departures (28.3%), followed by the Boeing 737 MAX 9 (23.5%).
What mileage do I earn flying ONT–SFO?
Distance-based programs credit off the 363-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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