Direct flights from Ontario to Denver

Did you mean Flights from Denver to Ontario?

Ontario

United States

ONT

Ontario International Airport

Denver

United States

DEN

Denver International Airport

Route: Nonstop service available
Distance: 818 miles
Marketing airlines: 5 airlines
Aircraft: 11 aircraft types
Dates: Nov 2, 2026 – Oct 31, 2027

Observed award fares

A sample of one-way prices for one traveler from Roame’s fare cache. Points, fees, and seats describe the same observation. Availability can change; confirm with the loyalty program before transferring points.

Lowest price in this limited sample: 12,500 points + $9.00 for ONT → DEN, Economy, on 2026-11-12, booked with Virgin Australia. This is an observed fare, not a guaranteed price or the lowest price across all dates and programs.

Departure window: 2026-11-12 – 2026-12-11.

ONT → DENEconomy
UA2446
12,500 points+ $9.00
Departure
2026-11-12
Seats seen
9
Book with
Virgin Australia
Observed (UTC)
2026-11-10 20:11
ONT → DENEconomy
UA2446
12,500 points+ $9.00
Departure
2026-11-15
Seats seen
9
Book with
Virgin Australia
Observed (UTC)
2026-11-11 00:06
ONT → DENEconomy
UA2446
12,500 points+ $9.00
Departure
2026-11-17
Seats seen
9
Book with
Virgin Australia
Observed (UTC)
2026-11-10 15:18
ONT → DENEconomy
UA1263
12,500 points+ $9.00
Departure
2026-12-11
Seats seen
9
Book with
Virgin Australia
Observed (UTC)
2026-11-11 13:52
ONT → DENEconomy
UA2446
12,500 points+ $9.00
Departure
2026-12-11
Seats seen
9
Book with
Virgin Australia
Observed (UTC)
2026-11-11 13:52

Ontario to Denver route overview

Ontario International Airport (ONT) serves Ontario; Denver International Airport (DEN) serves Denver.

The airports are 818 miles apart by great-circle distance.

Roame's current schedule feed shows nonstop service from ONT to DEN.

Marketing airlines listed in the current schedule, including codeshare sellers, are Air Canada (AC), Frontier Airlines (F9), United Airlines (UA), Southwest Airlines (WN) and Volaris (Y4). This list does not identify the operating airline for each flight; check the flight details before booking.

Published schedule dates span Nov 2, 2026 – Oct 31, 2027.

Marketing airlines on the Ontario to Denver route

These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.

Air Canada (AC)Codeshare only
Volaris (Y4)Codeshare only

Airline alliance affiliations represented: Star Alliance

Aircraft flying from ONT to DEN

Frequently asked questions

Which airports serve the Ontario to Denver route?

Ontario International Airport (ONT) is the origin airport and Denver International Airport (DEN) is the destination airport.

How far is Denver from Ontario?

ONT and DEN are approximately 818 miles apart by great-circle distance.

Are there direct flights from ONT to DEN?

Yes. Roame's current schedule feed shows nonstop service from ONT to DEN.

Which airlines market flights from ONT to DEN?

Which aircraft fly from ONT to DEN?

Aircraft listed in the current schedule include 2PM, Airbus A320 (320), Airbus A321 (321), Airbus A320neo (32N), Airbus A321neo (32Q), Boeing 737-800 (738), Boeing 737-900 / Boeing 737-900ER (739), Boeing 737-800 Winglets (73H), Boeing 737 MAX 8 (7M8), 7S7 and JET.