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
Filed traffic dataIn June 2026, Southwest Airlines was the only carrier flying nonstop ONT–SJC; the Boeing 737-700 was the most common aircraft at 48% of departures; flights ran 57% full.
Departures
227
June 2026
Seats
35,621
both directions
Passengers
20,247
both directions
Load factor
56.8%
RPM ÷ ASM
Who flies ONT–SJC?
Southwest Airlines was the only carrier to fly nonstop ONT–SJC in June 2026 (227 departures).
- WN
227 departures · 35,621 seats
Share of departures100.0%56.8%
Load
What plane flies ONT–SJC?
In June 2026, the Boeing 737-700 flew 48% of ONT–SJC departures — more than any other aircraft type.
- Boeing 737-700
108 departures · 68.5% load
47.6% - Boeing 737 MAX 8
83 departures · 48.6% load
36.6% - Boeing 737-800
36 departures · 48.5% load
15.9%
How has ONT–SJC traffic changed?
Nonstop ONT–SJC departures fell from 237 in July 2025 to 227 in June 2026.
Monthly nonstop ONT–SJC traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
221 departures · 19,768 passengers
57.4%
Load
June 2026
227 departures · 20,247 passengers
56.8%
Load
By direction
Each direction is filed separately — they rarely match.
ONT → SJC
60.0% full
114 departures · 10,371 passengers
SJC → ONT
53.9% full
113 departures · 9,876 passengers
Nonstop ONT–SJC traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
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 June 2026, the Boeing 737-700 flew the largest share of departures (47.6%), followed by the Boeing 737 MAX 8 (36.6%).
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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