Book Cheap Flights from Ontario with Alaska Airlines
Compare one-way ticket prices from Ontario.*
Ontario (ONT)to
Seattle (SEA)
Ontario (ONT)to
Portland (PDX)
Ontario (ONT)to
Honolulu (HNL)
Ontario (ONT)to
Anchorage (ANC)
Ontario (ONT)to
Lihue (LIH)
Ontario (ONT)to
Spokane (GEG)
Ontario (ONT)to
Redmond (RDM)Ontario (ONT)to
Kona (KOA)
Ontario (ONT)to
Bellingham (BLI)
Ontario (ONT)to
Pasco (PSC)
Ontario (ONT)to
Eugene (EUG)
Ontario (ONT)to
Nashville (BNA)*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 flight deals from Ontario.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Oct 8, 2025 | From $124 Seen: 6 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Aug 20, 2025 | From $124 Seen: 15 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Aug 12, 2025 | From $124 Seen: 6 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Sep 23, 2025 | From $124 Seen: 13 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Oct 4, 2025 | From $124 Seen: 54 minutes ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Main | Depart: Aug 14, 2025 | From $134 Seen: 15 hours ago | |
| Ontario (ONT) | Portland (PDX) | One-way | Main | Depart: Jul 13, 2025 | From $144 Seen: 3 hours ago | |
| Ontario (ONT) | Redmond (RDM) | One-way | Main | Depart: Jul 23, 2025 | From $158 Seen: 9 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Main | Depart: Oct 4, 2025 | From $168 Seen: 15 hours ago | |
| Ontario (ONT) | Portland (PDX) | One-way | Main | Depart: Jul 20, 2025 | From $174 Seen: 14 hours ago | |
| Ontario (ONT) | Portland (PDX) | One-way | Main | Depart: Aug 28, 2025 | From $174 Seen: 3 hours ago | |
| Ontario (ONT) | Portland (PDX) | One-way | Main | Depart: Jun 25, 2025 | From $174 Seen: 9 hours ago | |
| Ontario (ONT) | Eugene (EUG) | One-way | Main | Depart: Jul 16, 2025 | From $201 Seen: 14 hours ago | |
| Ontario (ONT) | Honolulu (HNL) | One-way | Main | Depart: Feb 23, 2026 | From $209 Seen: 12 hours ago | |
| Ontario (ONT) | Honolulu (HNL) | One-way | Main | Depart: Sep 16, 2025 | From $209 Seen: 9 hours ago | |
| Ontario (ONT) | Anchorage (ANC) | One-way | Main | Depart: Aug 27, 2025 | From $221 Seen: 6 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Main | Depart: Jun 30, 2025 | From $222 Seen: 11 hours ago | |
| Ontario (ONT) | Portland (PDX) | One-way | Main | Depart: Jun 26, 2025 | From $239 Seen: 9 hours ago | |
| Ontario (ONT) | Honolulu (HNL) | One-way | Main | Depart: Dec 1, 2025 | From $239 Seen: 5 hours ago | |
| Ontario (ONT) | Honolulu (HNL) | One-way | Main | Depart: Oct 5, 2025 | From $239 Seen: 4 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.
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