Flights from Ontario/LA, CA to Portland, OR

Promo Code

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

Oct 2026
from$138*
Last seen: 19 hours ago
One-way/Economy
Nov 2026
from$86*
Last seen: 2 hours ago
One-way/Economy
Dec 2026
from$88*
Last seen: 2 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $88
cmp-daily-histogram-bars-legend-max-price-aria-label $260
Displaying fares for October-2026
  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
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    OCT

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    27

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    Wed

  • ONT–PDX, Oct 29, 2026: from $138
    29

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    30

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  • ONT–PDX, Oct 31, 2026: from $138
    31

    Sat

  • ONT–PDX, Nov 1, 2026: from $144
    01

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    NOV

  • ONT–PDX, Nov 2, 2026: from $144
    02

    Mon

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    03

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    04

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    06

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    Sat

  • ONT–PDX, Nov 8, 2026: from $118
    08

    Sun

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    09

    Mon

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    10

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  • ONT–PDX, Nov 11, 2026: from $88
    11

    Wed

  • ONT–PDX, Nov 12, 2026: from $88
    12

    Thu

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    13

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  • ONT–PDX, Nov 14, 2026: from $88
    14

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  • ONT–PDX, Nov 15, 2026: from $260
    15

    Sun

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    16

    Mon

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

  • ONT–PDX, Nov 18, 2026: from $88
    18

    Wed

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    19

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  • ONT–PDX, Nov 20, 2026: from $93
    20

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  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    21

    Sat

    • Range$88-$260

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

    $
    Flights Deals from Ontario/LA, CA to Portland, OR on Frontier
    From
    To
    Ontario/LA, CA (ONT)Portland, OR (PDX)One-way
    /
    Discount Den Basic Fare    		Departing Mar 4, 2027

    From

    $148

    Last seen: 16 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®.

    Ontario/LA, CA Portland, OR

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