Flights from Portland, OR to Ontario/LA, CA

Promo Code

Best Deals on Flights From Portland, OR (PDX) to Ontario/LA, CA (ONT)

Sep 2026
from$110*
Last seen: 18 hours ago
One-way/Economy
Oct 2026
from$90*
Last seen: 23 hours ago
One-way/Economy
Nov 2026
from$128*
Last seen: 11 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $110
cmp-daily-histogram-bars-legend-max-price-aria-label $165
Displaying fares for September-2026
  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    07

    Mon

    SEP

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    08

    Tue

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    09

    Wed

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    10

    Thu

  • PDX–ONT, Sep 11, 2026: from $159
    11

    Fri

  • PDX–ONT, Sep 12, 2026: from $165
    12

    Sat

  • PDX–ONT, Sep 13, 2026: from $149
    13

    Sun

  • PDX–ONT, Sep 14, 2026: from $149
    14

    Mon

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

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    16

    Wed

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    17

    Thu

  • PDX–ONT, Sep 18, 2026: from $149
    18

    Fri

  • PDX–ONT, Sep 19, 2026: from $149
    19

    Sat

  • PDX–ONT, Sep 20, 2026: from $149
    20

    Sun

  • PDX–ONT, Sep 21, 2026: from $129
    21

    Mon

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

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    23

    Wed

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    24

    Thu

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    25

    Fri

  • PDX–ONT, Sep 26, 2026: from $129
    26

    Sat

  • PDX–ONT, Sep 27, 2026: from $110
    27

    Sun

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

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    30

    Wed

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

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    02

    Fri

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    03

    Sat

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    04

    Sun

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    05

    Mon

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    Tue

    • Range$110-$165

    *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 Portland, OR to Ontario/LA, CA on Frontier

    $
    *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®.

    Portland, OR Ontario/LA, CA

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