Flights from Ontario International Airport to Colorado

Flight deals from Ontario International Airport to Colorado

Looking for cheap tickets from Ontario International Airport to Colorado, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

Denver.$78 per passenger.Departing Sat, 24 Jan, returning Tue, 27 Jan.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Sat, 24 Jan, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 27 Jan, arriving in Ontario International.Price includes taxes and charges.From $78, select.

Grand Junction.$373 per passenger.Departing Wed, 28 Jan, returning Wed, 4 Feb.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Wed, 28 Jan, arriving in Grand Junction.Inbound indirect flight with United, departs from Grand Junction on Wed, 4 Feb, arriving in Ontario International.Price includes taxes and charges.From $373, select.

Aspen.$448 per passenger.Departing Fri, 20 Mar, returning Mon, 23 Mar.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Fri, 20 Mar, arriving in Aspen.Inbound indirect flight with United, departs from Aspen on Mon, 23 Mar, arriving in Ontario International.Price includes taxes and charges.From $448, select.

Vail.$449 per passenger.Departing Sat, 28 Feb, returning Tue, 3 Mar.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Sat, 28 Feb, arriving in Vail Eagle County.Inbound indirect flight with United, departs from Vail Eagle County on Tue, 3 Mar, arriving in Ontario International.Price includes taxes and charges.From $449, select.

Montrose.$506 per passenger.Departing Sun, 11 Jan, returning Thu, 15 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Sun, 11 Jan, arriving in Montrose.Inbound indirect flight with Southwest Airlines, departs from Montrose on Thu, 15 Jan, arriving in Ontario International.Price includes taxes and charges.From $506, select.

Colorado Springs.$578 per passenger.Departing Wed, 22 Jul, returning Wed, 29 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 22 Jul, arriving in Colorado Springs Peterson Field.Inbound indirect flight with Southwest Airlines, departs from Colorado Springs Peterson Field on Wed, 29 Jul, arriving in Ontario International.Price includes taxes and charges.From $578, select.

Durango.$702 per passenger.Departing Sun, 21 Dec, returning Thu, 25 Dec.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Sun, 21 Dec, arriving in Durango La Plata.Inbound indirect flight with United, departs from Durango La Plata on Thu, 25 Dec, arriving in Ontario International.Price includes taxes and charges.From $702, select.

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Flying from Ontario International Airport to Colorado

Arm yourself with these facts on the fly.

Cheapest flight found	$78
Cheapest month to fly	January
Average flight time	2 hrs, 16 mins
Average flights per week	74
Most popular airline	Southwest Airlines

How to find cheap flights from Ontario International Airport to Colorado

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Ontario International Airport to Colorado. Other savvy travellers recently found return flights from $78 and one-way tickets from $38. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in January

The cheapest time to fly from Ontario International Airport to Colorado is currently January.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Ontario International Airport to anywhere you choose in Colorado.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Ontario International Airport to your chosen airport in Colorado go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Colorado Airport to Colorado flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Are there any direct flights from Ontario International Airport to Colorado?

Yes - direct flights currently operate from Ontario International Airport to Denver International Airport in Colorado.

What is the average price of a flight from Ontario International Airport to Colorado?

We looked at all of the upcoming return flights from Ontario International Airport to Colorado we could find over the next 12 months. It looks like $78 is the best price. This is good, compared to the average Colorado ticket price of $448.

What is the cheapest month to fly from Ontario International Airport to Colorado?

The cheapest month to fly from Ontario International Airport to Grand Junction Airport is currently January.
The cheapest month to fly from Ontario International Airport to Montrose Airport is currently January.
The cheapest month to fly from Ontario International Airport to Aspen Airport is currently March.
And the cheapest month to fly from Ontario International Airport to Denver International Airport is usually January.

Which upcoming date is cheapest to fly from Ontario International Airport to Colorado on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ontario International Airport to Colorado on Saturday, 24 January 2026.

If I'm flying from Ontario International Airport, where in Colorado is cheapest to fly into?

If you're flying from Ontario International, the cheapest city in Colorado to fly into is Denver. The cheapest airport serving Denver at the moment is Denver International.