Cheap Flights From Denver, Colorado (DEN) To Ontario, California (ONT)

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Fares from Denver, CO (DEN)
$179 RT to
Ontario, CA (ONT)
Sorry this deal is over or has been sold out! But here’s another great Airfarewatchdog verified fare for this route!
$179 RT Denver to Ontario, CA
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US Airways
Seats are not available on all flights or all dates of travel. You may need to have flexible travel dates to find this fare. Fares for travel on holidays may be higher.
Adv. Purchase:
20 Days
Mon & Fri-Sun
Travel Starting:
Friday, 12 December 2014
More Details:
Lowest fare found for travel within the next 30 days.
Last Updated:
Saturday, 22 November 2014
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All mandatory taxes/fees are included in the price. Tax-inclusive fare may be a few dollars higher or lower depending on the airport you connect through, if any. Baggage fees, if applicable, and other optional fees are not included.

Our Dealhounds found this airfare using flexible date search. This means we searched a range of dates to find you the best price.

More Flights From Denver To Ontario (DEN-ONT)

$206 RT Non-Stop Flights. No min. stay. Fare can be bought one-way for half the... (Southwest) See all details »
  • Airline(s):
  • Seats are:
    Seats Are Not Available On All Flights Or All Dates Of Travel. You May Need To Have Flexible Travel Dates To Find This Fare. Fares For Travel On Holidays May Be Higher.
  • Advance Purchase:
    14 Days
  • Available for travel:
    Mon-Thur & Sat
  • Travel ending:
    Wednesday, February 11, 2015
  • More Details:
    Non-Stop Flights, No Min. Stay, Fare Can Be Bought One-way For Half The Lowest Roundtrip Price, No Peak Holiday Travel At This Price
  • Last Updated:
    Friday, November 21, 2014
  • Our Notes:
    Blackouts: December 17 through January 5. This is a fare from Southwest, please visit to find this fare. Other airlines often match Southwest ...moresales, so search other sites to find the best option.

Reviews for Denver to Ontario (DEN-ONT)

based on 1 reviews
Flown this route before? Write a review
    1. Flight Rating

    2. Check-in Experience:

    3. In-flight Service:

    4. Seat Comfort:

    Will not use cheapoair again.

    by cjet on September 11, 2010

    Flight from Denver to Ontario

    Round Trip
    Number of Stops:
    No stops
    Date of Flight:
    August 2010
    Seat Class:

    I went through cheapoair to book this flight.I did this because they offered continental airlines. My itinerary said continental. When we got to the continental gate they said they did not fly to Ontario, they sent us to United, which was on the other side of the airport. I do not like United so that's why I went continental. Sure enough they proved me right on why I don't fly United. They would not give me seat assignments at the check-in, they said I would get them at the gate. After walking with a baby to the last gate they offered which seemed like about a mile, I went to get my seat assignment and was told to sit down and wait until I was called. We got there an hour early and after they started loading the plane they finally gave us our seat assignments. They didn't have us boarding at the same time. Even the infant and her Mother were different boarding times. But after we got off the ground, the flight attendants and crew were some of the nicest we've had. Coming home, we were scheduled to leave at 11:03a.m. the board said "on time" with no one at the gate and no announcement until 11:45a.m. when the plane finally arrived. We finally took off around 12:15p.m. with the board still saying 11:03a.m. on time!

    We have use airfare watchdog since you were digital city and have always been happy with your hard work in finding us great deals. Thank you. However we will not use cheapoair again. Also Thank You for asking, Cheapoair never asked.

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Sample Fares found by other travelers within the past 72 hours
Price From/To Depart/Return Airline
$321 Flight from Denver to Ontario (DEN-ONT) Sat, Jun 7 - Wed, Jun 11 US Airways
$321 Flight from Denver to Ontario (DEN-ONT) Fri, Jun 6 - Wed, Jun 18 US Airways
$331 Flight from Denver to Ontario (DEN-ONT) Sat, Jun 7 - Thu, Jun 12 US Airways
$351 Flight from Denver to Ontario (DEN-ONT) Fri, Jun 6 - Sun, Jun 22 US Airways
$362 Flight from Denver to Ontario (DEN-ONT) Mon, Jun 9 - Tue, Jun 10 US Airways
$362 Flight from Denver to Ontario (DEN-ONT) Thu, Jun 5 - Thu, Jun 5 US Airways
$362 Flight from Denver to Ontario (DEN-ONT) Sat, Jun 7 - Mon, Jun 9 US Airways
$372 Flight from Denver to Ontario (DEN-ONT) Fri, Jun 6 - Sun, Jun 8 US Airways
$394 Flight from Denver to Ontario (DEN-ONT) Thu, Jun 5 - Sat, Jun 7 US Airways
$394 Flight from Denver to Ontario (DEN-ONT) Thu, Jun 5 - Thu, Jun 5 US Airways
There are approximately 160 flights covering the route from Denver International Airport in Denver to Ontario International Airport in Ontario, provided by as many as 7 airlines.

The following airlines sometimes offer nonstop cheap flights from Denver to Ontario:

Transwest Air

As an alternative to flying from Denver, you may also want to try searching for cheap flights from Colorado Springs (COS).
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