Flights from Denver, CO to Ontario/LA, CA

Promo Code

Best Deals on Flights From Denver, CO (DEN) to Ontario/LA, CA (ONT)

Try alternate month or interact with individual days below in order to find offers.
Jul 2026
No results for this month.
Aug 2026
from$32*
Last seen: 3 hours ago
One-way/Economy
Sep 2026
from$24*
Last seen: 4 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $32
cmp-daily-histogram-bars-legend-max-price-aria-label $185
Displaying fares for July-2026
  • DEN–ONT: cmp-view-offers-disclaimer. Find Offers
    30

    Thu

    JUL

  • DEN–ONT: cmp-view-offers-disclaimer. Find Offers
    31

    Fri

  • DEN–ONT, Aug 1, 2026: from $179
    01

    Sat

    AUG

  • DEN–ONT, Aug 2, 2026: from $185
    02

    Sun

  • DEN–ONT, Aug 3, 2026: from $179
    03

    Mon

  • DEN–ONT, Aug 4, 2026: from $179
    04

    Tue

  • DEN–ONT, Aug 5, 2026: from $169
    05

    Wed

  • DEN–ONT, Aug 6, 2026: from $175
    06

    Thu

  • DEN–ONT, Aug 7, 2026: from $175
    07

    Fri

  • DEN–ONT, Aug 8, 2026: from $169
    08

    Sat

  • DEN–ONT, Aug 9, 2026: from $175
    09

    Sun

  • DEN–ONT, Aug 10, 2026: from $169
    10

    Mon

  • DEN–ONT, Aug 11, 2026: from $169
    11

    Tue

  • DEN–ONT, Aug 12, 2026: from $136
    12

    Wed

  • DEN–ONT, Aug 13, 2026: from $136
    13

    Thu

  • DEN–ONT, Aug 14, 2026: from $136
    14

    Fri

  • DEN–ONT, Aug 15, 2026: from $136
    15

    Sat

  • DEN–ONT, Aug 16, 2026: from $136
    16

    Sun

  • DEN–ONT, Aug 17, 2026: from $136
    17

    Mon

  • DEN–ONT, Aug 18, 2026: from $66
    18

    Tue

  • DEN–ONT, Aug 19, 2026: from $32
    19

    Wed

  • DEN–ONT, Aug 20, 2026: from $32
    20

    Thu

  • DEN–ONT, Aug 21, 2026: from $112
    21

    Fri

  • DEN–ONT, Aug 22, 2026: from $32
    22

    Sat

  • DEN–ONT, Aug 23, 2026: from $43
    23

    Sun

  • DEN–ONT, Aug 24, 2026: from $32
    24

    Mon

  • DEN–ONT, Aug 25, 2026: from $32
    25

    Tue

  • DEN–ONT, Aug 26, 2026: from $32
    26

    Wed

  • DEN–ONT, Aug 27, 2026: from $32
    27

    Thu

  • DEN–ONT, Aug 28, 2026: from $99
    28

    Fri

  • DEN–ONT, Aug 29, 2026: from $32
    29

    Sat

    • Range$32-$185

    *Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

    Flights Deals from Denver, CO to Ontario/LA, CA on Frontier

    $
    Flights Deals from Denver, CO to Ontario/LA, CA on Frontier
    From
    To
    Denver, CO (DEN)Ontario/LA, CA (ONT)One-way
    /
    Discount Den Basic Fare    		Departing Nov 9, 2026

    From

    $32

    Last seen: 11 hours ago

    *Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

    Denver, CO Ontario/LA, CA

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