Ontario (ONT) to San Jose (SJC)
Flight time
≈ 1h 28m
Bearing
314° NW
Ontario (ONT) to San Jose (SJC) is 333 miles (536 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies ONT–SJC
US DOT T-100 · filed dataIn April 2026, Southwest Airlines operated the most departures, one of 2 carriers flying nonstop ONT–SJC; the Boeing 737-700 was the most common aircraft at 53% of departures; flights ran 57% full.
Departures
213
April 2026
Seats
33,005
both directions
Passengers
18,832
both directions
Load factor
57.1%
passengers ÷ seats
Who flies ONT–SJC?
Southwest Airlines operated the most nonstop ONT–SJC departures in April 2026 (212), one of 2 carriers on the route.
- WN
Southwest Airlines
212 departures · 32,806 seats
Share of departures99.5%57.3%
Load
- DL
Delta Air Lines
1 departures · 199 seats
Share of departures0.5%21.1%
Load
What plane flies ONT–SJC?
In April 2026, the Boeing 737-700 flew 53% of ONT–SJC departures — more than any other aircraft type.
- Boeing 737-700
113 departures · 60.4% load
53.0% - Boeing 737 MAX 8
68 departures · 53.9% load
31.9% - Boeing 737-800
31 departures · 55.7% load
14.5% - Boeing 757-200
1 departures · 21.1% load
0.5%
How has ONT–SJC traffic changed?
Nonstop ONT–SJC departures fell from 246 in May 2025 to 213 in April 2026.
Monthly nonstop ONT–SJC traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
246 departures · 22,026 passengers
55.3%
Load
June 2025
230 departures · 21,544 passengers
60.9%
Load
July 2025
237 departures · 19,375 passengers
53.1%
Load
August 2025
222 departures · 21,497 passengers
62.4%
Load
September 2025
214 departures · 21,664 passengers
64.6%
Load
October 2025
226 departures · 23,409 passengers
66.1%
Load
November 2025
236 departures · 22,668 passengers
63.0%
Load
December 2025
239 departures · 20,963 passengers
59.1%
Load
January 2026
203 departures · 15,203 passengers
48.5%
Load
February 2026
199 departures · 16,443 passengers
53.9%
Load
March 2026
216 departures · 19,206 passengers
58.5%
Load
April 2026
213 departures · 18,832 passengers
57.1%
Load
By direction
The DOT files each direction separately — they rarely match.
SJC → ONT
55.4% full
107 departures · 9,378 passengers
ONT → SJC
58.8% full
106 departures · 9,454 passengers
Nonstop ONT–SJC 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
San Jose
US
Norman Y. Mineta San Jose International Airport
Coordinates
37.36°N, 121.93°W
Hemisphere
N · W
Frequently asked
How far is Ontario (ONT) from San Jose (SJC)?
ONT to SJC is 333 miles (536 km / 290 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from ONT to SJC?
A nonstop covers the 333-mile great-circle distance in roughly 1h 28m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies ONT–SJC?
In April 2026, the Boeing 737-700 flew the largest share of departures (53.0%), followed by the Boeing 737 MAX 8 (31.9%).
What mileage do I earn flying ONT–SJC?
Distance-based programs credit off the 333-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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