Which airlines fly the Boeing 737 (all variants) from DEN to ONT?

See the operators list on this page — it is compiled from open ADS-B observed-flights data updated nightly. Operators with the most recent observations are listed first.

How often is the Boeing 737 (all variants) used on the DEN to ONT route?

Observed model variants and date ranges are listed below. Aircraft assignments can change seasonally; data refreshes nightly.

What is the typical schedule for Boeing 737 (all variants) flights from Denver to Ontario?

Schedules vary by operator. For live schedules and fares, search by aircraft on the FlightFinder home page.

Where does this data come from?

Operator and aircraft observations come from the adsb.lol open ADS-B network under the Open Database License. Data refreshes nightly.

Denver to Ontario on the Boeing 737 (all variants)

DEN → ONT · operated by the Boeing 737 (all variants)

Distance: 1,316 km (818 mi)
Est. flight time: ~1h 53m
Operators on Boeing 737 (all variants): 1
Observations (14 days): 2

Airlines operating the Boeing 737 (all variants) on DEN → ONT

Airline	Observations	First seen	Last seen
Southwest Airlines	2	2026-05-20	2026-05-20

About the Boeing 737 (all variants) on this route

The Boeing 737 (all variants) is used by 1 operator on Denver → Ontario.

For specifications, safety record, and global deployment data, see the Boeing 737 (all variants) family page or the Boeing 737 (all variants) safety record.

Other aircraft on the DEN–ONT route

Airbus A320 (all variants) — 1 observation

Airport details

Departure: Denver International Airport (DEN)

City: Denver
Country: United States
IATA / ICAO: DEN / KDEN

Arrival: Ontario International Airport (ONT)

City: Ontario
Country: United States
IATA / ICAO: ONT / KONT

Frequently asked questions

Which airlines fly the Boeing 737 (all variants) on the DEN-ONT route?

Airlines observed operating the Boeing 737 (all variants) on DEN to ONT include: Southwest Airlines.

How often does the Boeing 737 (all variants) fly DEN-ONT?

The Boeing 737 (all variants) was observed 2 times on the DEN–ONT route in the last 14 days across 1 operator.

What's the distance from Denver to Ontario?

The great-circle distance from Denver (DEN) to Ontario (ONT) is approximately 1,316 km (818 miles). Estimated flight time is ~1h 53m.

What other aircraft fly the DEN-ONT route?

Other aircraft observed on DEN–ONT include: Airbus A320 (all variants).

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