Book Cheap Flights from Ontario with Alaska Airlines
Find round-trip flight deals from Ontario.*
Ontario (ONT)to
Seattle (SEA)
Ontario (ONT)to
Portland (PDX)
Ontario (ONT)to
Honolulu (HNL)
Ontario (ONT)to
Boise (BOI)
Ontario (ONT)to
Anchorage (ANC)
Ontario (ONT)to
Maui (OGG)
Ontario (ONT)to
Vancouver (YVR)
Ontario (ONT)to
Spokane (GEG)
Ontario (ONT)to
Santa Rosa (STS)
Ontario (ONT)to
Lihue (LIH)
Ontario (ONT)to
Fairbanks (FAI)
Ontario (ONT)to
Newark (EWR)*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 | Saver | Depart: Mar 25, 2026 | From $70 Seen: 45 minutes ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Saver | Depart: Feb 24, 2026 | From $70 Seen: 2 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Saver | Depart: May 28, 2026 | From $70 Seen: 1 hour ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Saver | Depart: May 18, 2026 | From $70 Seen: 11 minutes ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Saver | Depart: Feb 28, 2026 | From $70 Seen: 2 hours ago | |
| Ontario (ONT) | Seattle (SEA) | One-way | Saver | Depart: Mar 3, 2026 | From $70 Seen: 2 hours ago | |
| Ontario (ONT) | Boise (BOI) | One-way | Saver | Depart: Mar 3, 2026 | From $79 Seen: 6 hours ago | |
| Ontario (ONT) | Santa Rosa (STS) | One-way | Saver | Depart: Mar 18, 2026 | From $79 Seen: 1 hour ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Feb 25, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Feb 28, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Mar 3, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Mar 4, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Mar 10, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Spokane (GEG) | One-way | Saver | Depart: Apr 7, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Saver | Depart: May 13, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Saver | Depart: Mar 14, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Saver | Depart: Mar 11, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Saver | Depart: Mar 4, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Pasco (PSC) | One-way | Saver | Depart: Feb 25, 2026 | From $99 Seen: 17 hours ago | |
| Ontario (ONT) | Redmond (RDM) | One-way | Saver | Depart: Apr 21, 2026 | From $99 Seen: 17 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.