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Flights to Ontario/LA, CA
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Traveling to Ontario/LA, CA
The Gateway to Southern California
Just east of Los Angeles, head to Ontario to experience a little bit of that hustle and bustle of LA with a laid-back vibe. With a vibrant music scene, a huge art scene and a wide variety of foreign restaurants, Ontario is a great place to visit.
Where Locals Go
Cucamonga-Guasti Regional Park
Planes of Fame Air Museum
Market Broiler
Vince's Spaghetti
Best Deals on Flights to Ontario/LA, CA
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Dallas, TX (DFW)To
Ontario/LA, CA (ONT)Departing Mar 7, 2026
From
$33
Last seen: 2 hours ago
One-way
Discount Den Basic Fare
Denver, CO (DEN)To
Ontario/LA, CA (ONT)Departing Mar 7, 2026
From
$19
Last seen: 10 hours ago
One-way
Discount Den Basic Fare
Las Vegas, NV (LAS)To
Ontario/LA, CA (ONT)Departing Mar 11, 2026
From
$19
Last seen: 13 hours ago
One-way
Discount Den Basic Fare
San Francisco, CA (SFO)To
Ontario/LA, CA (ONT)Departing Mar 10, 2026
From
$33
Last seen: 8 hours ago
One-way
Discount Den Basic Fare
Houston, TX (IAH)To
Ontario/LA, CA (ONT)Departing Mar 3, 2026
From
$33
Last seen: 5 hours ago
One-way
Discount Den Basic Fare
Salt Lake City, UT (SLC)To
Ontario/LA, CA (ONT)Departing Feb 27, 2026
From
$33
Last seen: 10 hours ago
One-way
Discount Den Basic Fare
Seattle, WA (SEA)To
Ontario/LA, CA (ONT)Departing Mar 2, 2026
From
$33
Last seen: 11 hours ago
One-way
Discount Den Basic Fare
Portland, OR (PDX)To
Ontario/LA, CA (ONT)Departing Apr 25, 2026
From
$33
Last seen: 10 hours ago
One-way
Discount Den Basic Fare
Sacramento, CA (SMF)To
Ontario/LA, CA (ONT)Departing Mar 2, 2026
From
$40
Last seen: 2 hours ago
One-way
Discount Den Basic Fare
*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®.
Best Flight Deals to Ontario/LA, CA with Frontier
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From | To | |||
|---|---|---|---|---|
| Dallas, TX (DFW) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 7, 2026 | From $33 Last seen: 2 hours ago |
| Denver, CO (DEN) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 7, 2026 | From $19 Last seen: 10 hours ago |
| Las Vegas, NV (LAS) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 11, 2026 | From $19 Last seen: 13 hours ago |
| San Francisco, CA (SFO) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 10, 2026 | From $33 Last seen: 8 hours ago |
| Houston, TX (IAH) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 3, 2026 | From $33 Last seen: 5 hours ago |
| Salt Lake City, UT (SLC) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing May 13, 2026 | From $33 Last seen: 3 hours ago |
| Seattle, WA (SEA) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 2, 2026 | From $33 Last seen: 11 hours ago |
| Portland, OR (PDX) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Apr 25, 2026 | From $33 Last seen: 10 hours ago |
| Sacramento, CA (SMF) | Ontario/LA, CA (ONT) | One-way / Discount Den Basic Fare | Departing Mar 2, 2026 | From $40 Last seen: 2 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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