Which airlines fly from Denver to Ontario?

This route is served by 1 airlines: Frontier Airlines.

Are there direct flights from Denver to Ontario?

Yes, there are direct flights on this route. Check the calendar above — prices for direct flights are highlighted.

Cheap flights Denver — Ontario | Prices from 135 $

Q: How long is the flight from Denver to Ontario?

Approximate flight time — 2 h 1 min. This is an average for a direct flight. With connections, the time may be longer.

Q: What is the distance from Denver to Ontario?

The straight-line distance — 1 289 km. This is the "as-the-crow-flies" distance; the actual route may be longer.

Q: How much do flights from Denver to Ontario cost?

The minimum price over 6 months — from 135 $ on 14.11.2026. Prices depend on the season, day of the week and how far in advance you book.

Q: What is the time difference between Denver and Ontario?

The time difference — -1 h. Keep this in mind when planning your flight and connections.

Q: When is the best time to buy tickets Denver — Ontario?

Optimal — 1–3 months before departure. The cheapest days — Tuesday, Wednesday, Saturday. Check the calendar above — it shows the best dates.

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Route characteristics

Distance

1 289 km

Flight time

2 h 1 min

Time difference

-1 h

Minimum price

from 135 $ (14.11.2026)

Departure airports

2 pcs.

Arrival airports

1 pcs.

Airlines on the route

1 pcs.

Who flies this route 1 pcs.

Frontier Airlines

Low-cost 1 flight

Where to buy tickets 1 pcs.

Farera

1 ticket

Airports

From — Denver

APA Centennial Airport
DEN Denver International Airport

To — Ontario

ONT Ontario International Airport

Frequently asked questions about the route Denver — Ontario

How long is the flight from Denver to Ontario?

Approximate flight time — 2 h 1 min. This is an average for a direct flight. With connections, the time may be longer. You will see the exact time when searching for tickets.

What is the distance from Denver to Ontario?

The straight-line distance — 1 289 km. This is the "as-the-crow-flies" distance; the actual route may be longer.

How much do flights from Denver to Ontario cost?

The minimum price over 6 months — from 135 $ on 14.11.2026. Prices depend on the season, day of the week and how far in advance you book. Usually cheaper 1–3 months before departure.

What is the time difference?

The difference — -1 h. Keep this in mind when planning your flight and connections.

From which airports does Denver operate flights?

From Denver: APA (Centennial Airport), DEN (Denver International Airport). Choose the most convenient airport.

To which airports in Ontario do flights arrive?

To Ontario: ONT (Ontario International Airport). Check which airport your flight arrives at.

Which airlines fly this route?

This route is served by 1 airline: Frontier Airlines.

When is the best time to buy tickets?

Optimal — 1–3 months before departure. The cheapest days — Tuesday, Wednesday, Saturday. Check the calendar above — it shows the best dates.

How do I book tickets?

Choose a date, passengers and click "Find tickets" — a search will open comparing prices from 800+ airlines. Booking is made directly with the airline or agency.

About the route Denver — Ontario

Flights Denver — Ontario is a popular route. The straight-line distance is 1 289 km. Flight time 2 h 1 min. Time difference -1 h.

From Denver (DEN) flights depart from 2 airports. To Ontario (ONT) — one arrival airport.

1 airline operate on this route: Frontier Airlines. Compare prices, baggage allowance and departure times.

The minimum price for the next 6 months — from 135 $ (14.11.2026). The cheapest dates are highlighted in the calendar above.

Other destinations from Denver