Fly nonstop from Ontario, CA to Denver $96 round-trip on Southwest.

Seen below, we found seats departing ONT on Tuesday, February 13, returning from DEN on Saturday, February 17, 2018.

Travel on select Tuesdays, Wednesdays, and Saturdays through February 28, 2018

See our Ontario ONT fare deals page for a complete look at current finds.

Need a room in Denver? Here's what's available for the above dates on Hotelwatchdog.

Stay on top of breaking airfare deals as we find them! Follow @airfarewatchdog on Twitter.

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