Flights from Petersburg (PSG) to Ontario (ONT) on Alaska Airlines

Lowest fares from Petersburg to Ontario

Nov 2026
From$475*
Seen: 18 hours ago
Flight Type One Way|Saver
Dec 2026
From$466*
Seen: 18 hours ago
Flight Type One Way|Saver
Jan 2027
From$466*
Seen: 18 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $466
cmp-daily-histogram-bars-legend-max-price-aria-label $1.0K
Displaying fares for November-2026
  • PSG–ONT, Nov 11, 2026: From $1,037
    11

    We

    NOV

  • PSG–ONT, Nov 12, 2026: From $1,020
    12

    Th

  • PSG–ONT, Nov 13, 2026: From $873
    13

    Fr

  • PSG–ONT, Nov 14, 2026: From $873
    14

    Sa

  • PSG–ONT, Nov 15, 2026: From $873
    15

    Su

  • PSG–ONT, Nov 16, 2026: From $856
    16

    Mo

  • PSG–ONT, Nov 17, 2026: From $797
    17

    Tu

  • PSG–ONT, Nov 18, 2026: From $856
    18

    We

  • PSG–ONT, Nov 19, 2026: From $856
    19

    Th

  • PSG–ONT, Nov 20, 2026: From $797
    20

    Fr

  • PSG–ONT, Nov 21, 2026: From $797
    21

    Sa

  • PSG–ONT, Nov 22, 2026: From $752
    22

    Su

  • PSG–ONT, Nov 23, 2026: From $561
    23

    Mo

  • PSG–ONT, Nov 24, 2026: From $754
    24

    Tu

  • PSG–ONT, Nov 25, 2026: From $572
    25

    We

  • PSG–ONT: cmp-view-offers-disclaimer. Find Offers
    26

    Th

  • PSG–ONT, Nov 27, 2026: From $651
    27

    Fr

  • PSG–ONT, Nov 28, 2026: From $858
    28

    Sa

  • PSG–ONT, Nov 29, 2026: From $561
    29

    Su

  • PSG–ONT, Nov 30, 2026: From $475
    30

    Mo

  • PSG–ONT, Dec 1, 2026: From $466
    01

    Tu

    DEC

  • PSG–ONT, Dec 2, 2026: From $466
    02

    We

  • PSG–ONT, Dec 3, 2026: From $466
    03

    Th

  • PSG–ONT, Dec 4, 2026: From $466
    04

    Fr

  • PSG–ONT, Dec 5, 2026: From $466
    05

    Sa

  • PSG–ONT, Dec 6, 2026: From $466
    06

    Su

  • PSG–ONT, Dec 7, 2026: From $466
    07

    Mo

  • PSG–ONT, Dec 8, 2026: From $466
    08

    Tu

  • PSG–ONT, Dec 9, 2026: From $466
    09

    We

  • PSG–ONT, Dec 10, 2026: From $475
    10

    Th

    • Range$466-$1,037

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    One-way low-fare flights Petersburg to Ontario.*

    $
    keyboard_arrow_down
    One-way low-fare flights Petersburg to Ontario.*
    From
    To
    Fare Type
    Dates
    Price
    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Mar 20, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Mar 23, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Mar 25, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Apr 7, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Apr 12, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Apr 13, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Apr 16, 2027

    From

    $466

    Seen: 18 hours ago

    Petersburg (PSG)Ontario (ONT)One-way
    |
    Saver    		Depart: Apr 17, 2027

    From

    $466

    Seen: 18 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    Frequently Asked Questions on flights from Petersburg (PSG) to Ontario (ONT)

    When is the best time to book a flight from Petersburg to Ontario?

    Want to find the lowest fares by day and time flying from Petersburg to Ontario on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.

    Can I earn points on my flight to Ontario?

    Yes, with Atmosâ„¢ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmosâ„¢ Rewards member yet? Learn more and join today.

    Can I rent a car when I arrive at LA/Ontario International Airport?

    Yes, you can rent a car at LA/Ontario International Airport. Check availability and book now

    Where can I find the status of my flight to Ontario?

    You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.

    Where can I find answers to questions about flying with Alaska Airlines?

    Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.

    Can I change or cancel my Alaska Airlines flight to Ontario?

    Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here. 

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