Southwest® flights from Greenville-Spartanburg to Ontario/LA from $514

Promo Code

Low fares from Greenville-Spartanburg to Ontario/LA

$

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/23/2026

One-way

Choice

From
$514
Seen: 19 hrs ago

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/20/2026

One-way

Choice

From
$514
Seen: 17 hrs ago

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/20/2026

One-way

Choice Preferred

From
$594
Seen: 17 hrs ago

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/17/2026

One-way

Choice

From
$594
Seen: 15 hrs ago

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/23/2026

One-way

Choice Preferred

From
$594
Seen: 19 hrs ago

Greenville-Spartanburg (GSP)to

Ontario/LA (ONT)
Depart: 11/20/2026

One-way

Choice Extra

From
$654
Seen: 17 hrs ago

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Explore flights from Greenville-Spartanburg to Ontario/LA

Nov 2026
From$514*
Seen: 19 hrs ago
One Way/Basic
Dec 2026
No result for this month.
Jan 2027
No result for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label $514
Displaying fares for November-2026
  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    13

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    NOV

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  • GSP–ONT, 11/17/2026: From $594
    17

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    20

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  • GSP–ONT, 11/23/2026: From $514
    23

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    DEC

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    11

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    12

    Sat

    • Range$514-$594

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Greenville-Spartanburg International Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    2010 miles

    Questions we hear the most

    There are 41 weekly flights from Greenville-Spartanburg to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Greenville-Spartanburg to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from Greenville-Spartanburg to Ontario/LA—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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