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  1. Flights
  2. United States
  3. Denver
  4. Ontario, CA - Denver

Cheap Flights from Ontario, CA (ONT) to Denver (DEN)

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Discover the cheapest flights from Ontario, CA to Denver
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Mon, May 12 - Wed, May 14
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
-20 %
56$
45$
Prime price per passenger
Thu, May 1 - Sat, May 10
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
-18 %
57$
47$
Prime price per passenger
Tue, Jun 17 - Thu, Jun 26
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
-18 %
57$
47$
Prime price per passenger
Tue, Jul 8 - Wed, Jul 9
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
-18 %
57$
47$
Prime price per passenger
Sat, Jun 7 - Thu, Jun 12
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
99$
96$
Prime price per passenger
Sat, May 31 - Sat, May 31
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
Frontier Airlines
Frontier AirlinesDirect
DEN - ONT
100$
97$
Prime price per passenger
Tue, Jul 1
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
-18 %
65$
54$
Prime price per passenger
Sat, May 17
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
-18 %
66$
55$
Prime price per passenger
Sat, May 31
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
-17 %
66$
55$
Prime price per passenger
Sat, Jun 7
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
-18 %
67$
56$
Prime price per passenger
Sat, May 10
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
66$
64$
Prime price per passenger
Sat, Jun 21
Frontier Airlines
Frontier AirlinesDirect
ONT - DEN
66$
64$
Prime price per passenger
Prices shown below were available within the past 3 days for the period specified and should not be considered the final price offered. Please note that availability and prices are subject to change.

Cheapest time to fly from Ontario, CA to Denver

Flexible with dates? We find the best price for the week of the day you select *Prices may vary after you search.
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week: Apr 21 - Apr 27
Flights from just $24
$24
$26
$29
$29
$40
$43
$44
$45
$43
$47
$44
$43
AprilMayJuneJuly
Flying Time2 h and 19 mWhen flying from Ontario, CA to Denver, this can take around 2 h and 19 m in flying time, however this flight duration can vary due to other factors
Cheapest flight$45The best price for flights from Ontario, CA to Denver offered by eDreams, which have been found by our customers in the last 3 days
Departure AirportOntario InternationalOntario International is where you'll take off when flying from Ontario, CA to Denver
Arrival AirportDenver InternationalYou'll land at Denver International when flying from Ontario, CA to Denver
Peak seasonJuneJune is the busiest time to fly from Ontario, CA to Denver according to search data results from our customers
Airlines operating this routeFrontier AirlinesAirline(s) that fly from Ontario, CA to Denver
Best time to bookJuneJune is one of the most frequent times to fly to Denver from Ontario, CA according to real data from our customers

Route information

Distance: 801 miles
Ontario, CA airports
Ontario International (ONT)How far from city center: 2 miles
Denver airports
Denver International (DEN)How far from city center: 19 miles

Are you searching for flights from Ontario, CA to Denver?

Are you planning to travel to Denver for vacations, business or family visits? eDreams offers you the cheapest flights and best deals departing from Ontario, CA. With our fast search engine you will get a large selection of airfares from standard and low cost airlines worldwide and easily book your tickets for this route. If you are flexible we help you identify the cheapest day to fly to Denver and if you need to leave soon you can check our most convenient last minute fares. Read all the useful information about your next destination and proceed to the reservation, indicating your flight dates and completing your travel booking with hotels and car rental!

Frequently asked questions about flights from Ontario, CA to Denver

What are the benefits of booking flexible flight tickets?
Using the flexible flight ticket, you're guaranteed a refund or a rebooking option (without fees) in case of flight cancellations when travelling to United States. At eDreams have you covered!
For flights from Ontario, CA to Denver, how can I find the cheapest price?
The cheapest price for a flight from Ontario, CA to Denver is $45. At eDreams we use different machine learned based methodologies to find our costumers the best option available, considering airline combinations, stopovers and direct flights as well as different criteria for inbound and outbound journeys.
When booking, when is the best time to get the best prices for flights from Ontario, CA to Denver?
The most popular months to book a trip from Ontario, CA to Denver are June, May and July, based on the searches of our customers.
When is the best time to travel from Ontario, CA to Denver?
The best time of the year to visit Denver depends on lots of personal preferences, especially the price. Regarding popularity, June is the best month to fly to Denver from Ontario, CA in terms of searches from our customers, followed by August and May. If you prefer to avoid the busy season and get away from the crowds January, December and February are the months with fewer searches for Ontario, CA - Denver.
How long does the flight from Ontario, CA to Denver take?
Flight length from Ontario, CA to Denver is around 02:19 hours on average, at an average distance of 1,317 km, for flights for the route (which may have 1 or more stops in other cities in between).
How is the weather in Denver compared to Ontario, CA?
While in Ontario, CA the temperatures can reach an average of 36.7 ºC in summer, with precipitation levels up to 1.4 mm ,Denver's temperatures can go up to 34.63 ºC during the hot season, with 12 mm average of rain rate . In winter, however, weather indicators show around -17.82 ºC in Denver, compared to the -0.46 ºC average degrees reported in Ontario, CA. During the winter period, Ontario, CA can register 3 mm precipitation, while Denver have an average of 9 mm rain level.
Which airports have flights between Ontario, CA and Denver?

The main route from Ontario, CA to Denver is: Ontario International (ONT) to Denver International (DEN). The following airlines fly this route:

Frontier Airlines.

American Airlines.

Spirit Airlines.

Which airlines fly from Ontario, CA to Denver?

The airlines that fly non-stop from Ontario, CA to Denver are:

  • Frontier Airlines.
  • United Airlines.

Plan your trip

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