Flights from Ontario/LA, CA to Philadelphia, PA

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Best Deals on Flights From Ontario/LA, CA (ONT) to Philadelphia, PA (PHL)

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Sep 2026
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Oct 2026
from$118*
Last seen: 21 hours ago
One-way/Economy
Nov 2026
No results for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label $118
Displaying fares for September-2026
  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
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    SEP

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    OCT

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  • ONT–PHL, Oct 8, 2026: from $213
    08

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  • ONT–PHL, Oct 9, 2026: from $213
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  • ONT–PHL, Oct 12, 2026: from $213
    12

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  • ONT–PHL, Oct 13, 2026: from $124
    13

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  • ONT–PHL, Oct 14, 2026: from $124
    14

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  • ONT–PHL, Oct 15, 2026: from $163
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  • ONT–PHL, Oct 16, 2026: from $132
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  • ONT–PHL, Oct 22, 2026: from $118
    22

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    • Range$118-$213

    *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 Philadelphia, PA 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®.

    Ontario/LA, CA Philadelphia, PA

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