Menu

Cheap flights from Ontario to Denver (ONT - DEN)

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

The best prices from Ontario to Denver are usually found in February or January, booked 29 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

How to find the cheapest flight from
Ontario (ONT) to Denver (DEN)

ONT - DEN
Price
$130 - $238
DEN
Temperature
44.6 - 89.6 °F
DEN
Rainfall
0.5 - 2.7 inches
Popular in December High demand for flights, 24% potential price rise
Cheapest in February Best time to find cheap flights, 28% potential price drop
Average price $167 Average for round-trip flights in August 2020
Round-trip from $130 From Ontario to Denver
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Ontario to Denver?

Saturday flights are found to be more expensive to fly from Ontario to Denver. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Denver.

How far in advance should I book a flight from Ontario to Denver?

To save on the cost of your flight from Ontario to Denver, book at least 57 days before your planned departure. Booking around this time can save you about 12% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $116 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $131.

When is the cheapest time to fly from Ontario to Denver (ONT - DEN)?

It’s typically best to fly out from Ontario to Denver in the afternoon. Doing so could potentially save you 42% on the flight price compared to flying in the noon, which is usually more expensive.

Cheap flights from Ontario to Denver in August, September 2020

The best prices found for ONT to DEN flights for August, September
7 Aug - 9 Aug
$127pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario
3 Aug - 10 Aug
$131pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
American Airlines
 
1 STOP
ONT
Ontario
24 Jul - 24 Aug
$132pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario

Ontario to Denver 2020 flight deals

Cheap flights to Denver from Ontario found for this year
7 Aug - 9 Aug
$127pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario
3 Aug - 10 Aug
$131pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
American Airlines
 
1 STOP
ONT
Ontario
24 Jul - 24 Aug
$132pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario

Non-stop flights to Denver from Ontario

Save time with Ontario to Denver direct flight deals
7 Aug - 9 Aug
$127pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario
24 Jul - 24 Aug
$132pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario
3 Aug - 6 Aug
$137pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario

Last minute flights from Ontario to Denver

Late deals on round-trip flights to Denver from Ontario, departing today and this week
24 Jul - 15 Aug
$127pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario
24 Jul - 24 Aug
$131pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
American Airlines
 
1 STOP
ONT
Ontario
24 Jul - 24 Aug
$132pp
ONT
Ontario
Multiple Airlines
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Non-Stop
ONT
Ontario

One-way flights to Denver from Ontario

The cheapest one-way flights from Ontario to Denver
9:32 am - 12:50 pm
Allegiant Air
Nonstop
2h 18m
ONT - DEN
Allegiant Air
$176
Ovago
1:25 pm - 6:53 pm
Spirit Airlines
1 Stop
4h 28m
ONT - DEN
Spirit Airlines
$253
Ovago
6:20 pm - 6:10 am
JetBlue
1 Stop
10h 50m
ONT - DEN
JetBlue

Related info for your journey

Useful info, stats and facts about Ontario to Denver flights.

Flight FAQs

From Ontario to Denver

Are flight prices decreasing from Ontario to Denver due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and Denver for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Ontario to Denver for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to Denver for under $200. The cheapest flight booked recently is on Multiple Airlines for just $127, but on average you can expect to pay $157.

Are there nonstop flights from Ontario to Denver for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Ontario to Denver under $200. A good price for a nonstop flight from Ontario to Denver is less than $212.

Are there last-minute flights available from Ontario to Denver for under $200?

There are currently 20+ open flights from Ontario to Denver within the next 7 days for less than $200.

What days are nonstop flights available from Ontario to Denver?

Nonstop flights are available for this route on the following days: Sunday, Saturday.

How popular is this flight route?

This flight path from Ontario to Denver Intl was viewed by 816 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from Ontario to Denver on average per day?

On average, you can expect to see 2 flights from Ontario to Denver Intl a day.
Early Morning (Midnight to 6am) - 100% of flight departures

Does it rain more in Ontario or Denver?

Expected rainfall in Ontario is more than in Denver. You can expect this to be the case over the next 1 days.

Is Ontario weather warmer or cooler than Denver?

Expect the weather to be around 95 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Denver is generally colder than in Ontario.

How long is the flight from Ontario to Denver?

Sun Country Air can get you from Ontario to Denver in just under 2h 11m. Your travel time will be generally consistent. The distance between Ontario and Denver is about 822 mi. Generally, flights for this route are nonstop.

What are the cheapest airlines flying from Ontario to Denver round-trip?

Cheapflights users have booked flights from Ontario to Denver round-trip from $177. Another airline that can offer you cheap pricing is Delta. You may be able to fly from Ontario to Denver for 1% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ontario to Denver one-way?

$89 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Sun Country Air and Delta, with prices starting from $93 and $103, respectively.

Alternative routes for Ontario to Denver

Destination information for Denver

Things to know before you go. Useful info for your trip from Ontario to Denver
Flight duration
2h 20m
Average temperature for August in Denver
86.0 °F
Avg rainfall for August in Denver
2.7 ″

Airports servicing Ontario

Airports servicing Denver

Hourly flight availability from Ontario to Denver

Early morning Midnight to 6 AM 42% of ONT to DEN departures
Afternoon Noon to 6 PM 31% of ONT to DEN departures
Morning 6 AM to noon 26% of ONT to DEN departures
Evening 6 PM to midnight 1% of ONT to DEN departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Ontario to Denver
Sunday
3 daily flights
Monday
9 daily flights
Tuesday
7 daily flights
Wednesday
9 daily flights
Thursday
11 daily flights
Friday
13 daily flights
Saturday
5 daily flights
Home North America USA Colorado Denver Cheap flights from Ontario to Denver