Cheap flights from Colorado to Los Angeles from $43
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Los Angeles departing on 5/28. 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 Colorado to Los Angeles
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Frontier flights from Colorado to Ontario
Our best Frontier deals on Colorado to Ontario flight tickets
Alaska Airlines flights from Colorado to Ontario
Our best Alaska Airlines deals on Colorado to Ontario flight tickets
See travel insights to Los Angeles from
How to get the cheapest flight ticket from Colorado to Ontario
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 Ontario?
In general, August is the cheapest month to fly from Colorado to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $113. If you aren’t able to travel during the month of August, then book flights to Ontario from Colorado during January instead. Flights to Ontario in January, while not as cheap as those in August, still average around $115.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $119. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Colorado to Ontario for around $149.
What is the cheapest time of day to depart on your flight to Ontario?
In the morning is the cheapest time of day to fly from Colorado to Ontario when you can find flight prices for as low as $132. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $197 on average. Flights to Ontario from Colorado at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Colorado to Ontario flight route?
Fly from Denver Intl to Ontario for the best Colorado - Ontario flight prices
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from Colorado when booking 7 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $143 when searching 7 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Colorado for as low as $104 on momondo.
What cabin class options are available on Colorado to Ontario flights?
There are 4 cabin classes available to choose from on Colorado to Ontario 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 Colorado to Ontario?
Frontier, United Airlines, and Southwest are the most popular carriers operating from Colorado to Ontario
What airlines fly to Ontario?
Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Ontario from Colorado according to our data. Frontier is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
How many flights depart from Colorado to Ontario on average per day?
9 flights are operational daily from Colorado to Ontario as of May 2025. The most popular departure time for this route is 7:00PM, with 42% of flights per day taking off in the evening.
How many flights depart from Colorado to Ontario on average per week?
As of May 2025, there are 64 flights per week flying from Colorado to Ontario. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.
Cheap Colorado to Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Colorado to Ontario
When did momondo last update prices for flights from Colorado to Ontario Airport?
Prices for flights from Colorado to Ontario Airport refresh daily.
How many operators does momondo search for flights from Colorado to Ontario Airport?
As of May 2025, there are 5 operators available to choose from for flights from Colorado to Ontario Airport.
How old do you have to be to fly from Colorado to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Colorado to Ontario?
momondo data reveals that the most frequently booked plane model on the route from Colorado to Ontario is Airbus A320neo, representing 16.81% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 12.62%, Boeing 737-800 at 11.06%, and Boeing 737-700 Passenger/BBJ1 (winglets) at 10.11%.
Best airlines flying from Colorado to Ontario
Compare and see reviews for airlines that fly from Colorado to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $55 | Free Cancellation | Rating 5.9 3,289 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 8.0 4,292 reviews | |||
| PriceFrom $137 | Free Cancellation | Rating 7.4 8,710 reviews | |||
| PriceFrom $218 | Free Cancellation | Rating 8.0 7,944 reviews | |||
| PriceFrom $278 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Colorado to Ontario?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Colorado.
Can I find flights from Colorado to Ontario with flexible booking policies on momondo?
All flight searches from Colorado to Ontario on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Colorado to Ontario?
Once all potential Colorado to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Colorado to Ontario right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Colorado to Ontario 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.