Cheap flights from Ontario to Denver

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In 1861, the Colorado Territory and Arapaho County were formed.  In this same year, Denver City was made an official city and finally became the Arapaho County seat.  Four years later, Denver City was made the capital of the Colorado Territory and on August 1, 1876 the city was named the state capital when Colorado was accepted as a state in the union.  The name Denver City was shortened to Denver during this time.  ... (read more in our Denver History)

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Check our newest flight offers to Denver:

  • $63Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Denver, CO (DEN)08/03/202412:39 am
    Denver, CO (DEN)Ontario, CA (ONT)08/14/202410:20 pm
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  • $78Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Denver, CO (DEN)07/24/202412:59 am
    Denver, CO (DEN)Ontario, CA (ONT)08/03/202410:40 pm
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  • $83Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Denver, CO (DEN)08/04/202412:59 am
    Denver, CO (DEN)Ontario, CA (ONT)08/17/202405:11 am
    cheapoair.com check price
  • $88Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Denver, CO (DEN)07/31/202412:59 am
    Denver, CO (DEN)Ontario, CA (ONT)08/15/202406:00 am
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  • $94Frontier Airlines flight Frontier Airlines 
    FromToDepartureTime
    Ontario, CA (ONT)Denver, CO (DEN)08/09/202406:05 am
    Denver, CO (DEN)Ontario, CA (ONT)08/23/202406:00 am
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