Flights from Ontario/LA, CA
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Traveling From Ontario/LA, CA
Take the leap and book the trip you’ve been waiting for. Choose from over 100 destinations across the United States, or fly from the USA to some of your favorite destinations in Mexico and the Caribbean.
Best Flight Deals from Ontario/LA, CA with Frontier
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From | To | |||
|---|---|---|---|---|
| Ontario/LA, CA (ONT) | Las Vegas, NV (LAS) | One-way / Discount Den Basic Fare | Departing Dec 14, 2025 | From $16 Last seen: 13 hours ago |
| Ontario/LA, CA (ONT) | Denver, CO (DEN) | One-way / Discount Den Basic Fare | Departing Dec 5, 2025 | From $21 Last seen: 11 hours ago |
| Ontario/LA, CA (ONT) | Dallas, TX (DFW) | One-way / Discount Den Basic Fare | Departing Nov 6, 2025 | From $29 Last seen: 17 hours ago |
| Ontario/LA, CA (ONT) | San Francisco, CA (SFO) | One-way / Discount Den Basic Fare | Departing Nov 16, 2025 | From $16 Last seen: 8 hours ago |
| Ontario/LA, CA (ONT) | Seattle, WA (SEA) | One-way / Discount Den Basic Fare | Departing Nov 10, 2025 | From $31 Last seen: 8 hours ago |
| Ontario/LA, CA (ONT) | Houston, TX (IAH) | One-way / Discount Den Basic Fare | Departing Dec 15, 2025 | From $31 Last seen: 12 hours ago |
| Ontario/LA, CA (ONT) | Portland, OR (PDX) | One-way / Discount Den Basic Fare | Departing Nov 10, 2025 | From $31 Last seen: 6 hours ago |
| Ontario/LA, CA (ONT) | Sacramento, CA (SMF) | One-way / Discount Den Basic Fare | Departing Dec 5, 2025 | From $73 Last seen: 13 hours ago |
| Ontario/LA, CA (ONT) | Salt Lake City, UT (SLC) | One-way / Discount Den Basic Fare | Departing Nov 17, 2025 | From $29 Last seen: 11 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®.
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