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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.HK$653 per passenger.Departing Sat, 13 Sep, returning Sat, 20 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Sat, 13 Sep, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 20 Sep, arriving in Ontario International.Price includes taxes and charges.From HK$653, select.
Montrose.HK$1,550 per passenger.Departing Sat, 7 Feb, returning Wed, 11 Feb.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 7 Feb, arriving in Montrose.Inbound indirect flight with Southwest Airlines, departs from Montrose on Wed, 11 Feb, arriving in Ontario International.Price includes taxes and charges.From HK$1,550, select.
Durango.HK$1,849 per passenger.Departing Sat, 13 Sep, returning Wed, 17 Sep.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Sat, 13 Sep, arriving in Durango La Plata.Inbound indirect flight with United, departs from Durango La Plata on Wed, 17 Sep, arriving in Ontario International.Price includes taxes and charges.From HK$1,849, select.
Aspen.HK$1,930 per passenger.Departing Sat, 13 Sep, returning Wed, 17 Sep.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Sat, 13 Sep, arriving in Aspen.Inbound indirect flight with United, departs from Aspen on Wed, 17 Sep, arriving in Ontario International.Price includes taxes and charges.From HK$1,930, select.
Colorado Springs.HK$2,039 per passenger.Departing Wed, 29 Oct, returning Mon, 3 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 29 Oct, arriving in Colorado Springs Peterson Field.Inbound indirect flight with Southwest Airlines, departs from Colorado Springs Peterson Field on Mon, 3 Nov, arriving in Ontario International.Price includes taxes and charges.From HK$2,039, select.
Grand Junction.HK$2,085 per passenger.Departing Fri, 12 Sep, returning Tue, 16 Sep.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Fri, 12 Sep, arriving in Grand Junction.Inbound indirect flight with United, departs from Grand Junction on Tue, 16 Sep, arriving in Ontario International.Price includes taxes and charges.From HK$2,085, select.
Vail.HK$2,680 per passenger.Departing Sat, 4 Oct, returning Tue, 7 Oct.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Sat, 4 Oct, arriving in Vail Eagle County.Inbound indirect flight with United, departs from Vail Eagle County on Tue, 7 Oct, arriving in Ontario International.Price includes taxes and charges.From HK$2,680, select.
Pueblo.HK$2,854 per passenger.Departing Mon, 15 Sep, returning Fri, 19 Sep.Return flight with Frontier Airlines and Key Lime Air dba Denver Air Connection.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 15 Sep, arriving in Pueblo.Inbound indirect flight with Key Lime Air dba Denver Air Connection, departs from Pueblo on Fri, 19 Sep, arriving in Ontario International.Price includes taxes and charges.From HK$2,854, select.

Flying from Ontario International Airport to Colorado

Arm yourself with these facts on the fly.
Cheapest flight foundHK$653, Denver
Cheapest month to flySeptember
Average flight time2 hrs, 16 mins
Average flights per week77
Most popular airlineSouthwest Airlines

Frequently asked questions

Yes - direct flights currently operate from Ontario International Airport to Denver International Airport in 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 HK$653 is the best price. This is good, compared to the average Colorado ticket price of HK$2,376.
The cheapest month to fly from Ontario International Airport to Pueblo Airport is currently September.
The cheapest month to fly from Ontario International Airport to Gunnison Airport is currently September.
The cheapest month to fly from Ontario International Airport to Grand Junction Airport is currently September.
And the cheapest month to fly from Ontario International Airport to Durango La Plata Airport is usually September.
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, 13 September 2025.
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.
The average flight time between Ontario International Airport and Colorado is 2 hours and 16 minutes.