Cheap flights from Ontario to Colorado from $39
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Colorado departing on 5/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ontario to Colorado
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
United Airlines flights from Ontario to Colorado
Our best United Airlines deals on Ontario to Colorado flight tickets
Frontier flights from Ontario to Colorado
Our best Frontier deals on Ontario to Colorado flight tickets
See travel insights to Colorado from
How to get the cheapest flight ticket from Ontario to Colorado
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Colorado?
The month of January is, on average, the cheapest month to fly to Colorado from Ontario, with most prices found around $98. The month of February is another great option to travel to Colorado, with average flight prices from Ontario averaging around $108.
What is the cheapest day to depart on your flight to Colorado?
The cheapest day to depart from Ontario to Colorado is on a Saturday when prices can be found for as low as $229. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $314.
What is the cheapest time of day to depart on your flight to Colorado?
The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $194. At noon is when there is more demand to fly to Colorado, so prices are often more expensive at around $420 per ticket.
What is the cheapest Ontario to Colorado flight route?
Fly from Ontario to Denver Intl for the best Ontario - Colorado flight prices
How far in advance should I book a flight to Colorado?
You are more likely to see cheaper flights to Colorado from Ontario when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $143 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Ontario for as low as $106 on momondo.
What cabin class options are available on Ontario to Colorado flights?
There are 4 cabin classes available to choose from on Ontario to Colorado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Colorado?
Frontier, United Airlines, and Southwest are the most popular carriers operating from Ontario to Colorado
What airlines fly to Colorado?
Frontier, United Airlines and Delta are the top three most popular airlines that fly to Colorado from Ontario according to our data. Frontier is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 9 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to Colorado on average per day?
The number of flights available between Ontario and Colorado is 9 per day as of April 2025. The most frequent departure time is 5:00AM, with 49% of daily flights leaving in the afternoon.
How many flights depart from Ontario to Colorado on average per week?
64 flights are operational weekly from Ontario to Colorado as of April 2025. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.
Cheap Ontario to Colorado flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Colorado
When did momondo last update prices for flights from Ontario Airport to Colorado?
Prices for flights from Ontario Airport to Colorado refresh daily.
How many operators does momondo search for flights from Ontario Airport to Colorado?
As of April 2025, there are 5 operators available to choose from for flights from Ontario Airport to Colorado.
How old do you have to be to fly from Ontario Airport to Colorado?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The travel and health documents required for your trip to Colorado can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to Colorado?
Based on momondo bookings for flights between Ontario and Colorado, the leading plane model is Airbus A320neo, making up 15.96% of the total bookings. Other popular models include Boeing 737 MAX 8 with 11.95%, Boeing 737-800 with 9.72%, and Boeing 737-800 Passenger/BBJ2 (winglets) with 9.63%.
Best airlines flying from Ontario to Colorado
Compare and see reviews for airlines that fly from Ontario to Colorado with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $54 | Free Cancellation | Rating 6.0 3,281 reviews | |||
| PriceFrom $97 | Free Cancellation | Rating 8.0 4,280 reviews | |||
| PriceFrom $132 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $159 | Free Cancellation | Rating 8.0 7,916 reviews | |||
| PriceFrom $218 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Colorado?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Colorado for you.
Can I find flights from Ontario to Colorado with flexible booking policies on momondo?
All flight searches from Ontario to Colorado on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Colorado?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Colorado.
I’m not ready to book a flight from Ontario to Colorado right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ontario to Colorado flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.