Ontario (ONT) to Chicago (ORD)
Flight time
≈ 4h 12m
Bearing
62° NE
Ontario (ONT) to Chicago (ORD) is 1,697 miles (2,730 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies ONT–ORD
Filed traffic dataIn July 2026, United Airlines operated the most departures, one of 2 carriers flying nonstop ONT–ORD; the Boeing 737-900ER was the most common aircraft at 92% of departures; flights ran 89% full.
Departures
60
July 2026
Seats
10,719
both directions
Passengers
9,523
both directions
Load factor
88.8%
RPM ÷ ASM
Who flies ONT–ORD?
United Airlines operated the most nonstop ONT–ORD departures in July 2026 (57), one of 2 carriers on the route.
- UA
57 departures · 10,203 seats
Share of departures95.0%88.3%
Load
- AA
3 departures · 516 seats
Share of departures5.0%98.6%
Load
What plane flies ONT–ORD?
In July 2026, the Boeing 737-900ER flew 92% of ONT–ORD departures — more than any other aircraft type.
- Boeing 737-900ER
55 departures · 89.2% load
91.7% - Boeing 737-800
3 departures · 98.6% load
5.0% - Boeing 737 MAX 9
2 departures · 65.6% load
3.3%
How has ONT–ORD traffic changed?
Nonstop ONT–ORD departures fell from 62 in August 2025 to 60 in July 2026.
Monthly nonstop ONT–ORD traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
62 departures · 8,686 passengers
85.5%
Load
September 2025
59 departures · 8,182 passengers
83.5%
Load
October 2025
62 departures · 8,787 passengers
85.0%
Load
November 2025
60 departures · 7,760 passengers
77.3%
Load
December 2025
31 departures · 4,215 passengers
81.3%
Load
January 2026
11 departures · 1,629 passengers
88.9%
Load
February 2026
1 departures · 168 passengers
97.7%
Load
March 2026
52 departures · 5,795 passengers
70.4%
Load
April 2026
58 departures · 6,793 passengers
83.8%
Load
May 2026
62 departures · 9,439 passengers
85.7%
Load
June 2026
59 departures · 8,805 passengers
83.4%
Load
July 2026
60 departures · 9,523 passengers
88.8%
Load
By direction
Each direction is filed separately — they rarely match.
ORD → ONT
86.2% full
32 departures · 4,922 passengers
ONT → ORD
91.8% full
28 departures · 4,601 passengers
Nonstop ONT–ORD traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Ontario (ONT) from Chicago (ORD)?
ONT to ORD is 1,697 miles (2,730 km / 1,474 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from ONT to ORD?
A nonstop covers the 1,697-mile great-circle distance in roughly 4h 12m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies ONT–ORD?
In July 2026, the Boeing 737-900ER flew the largest share of departures (91.7%), followed by the Boeing 737-800 (5.0%).
What mileage do I earn flying ONT–ORD?
Distance-based programs credit off the 1,697-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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