Flights from Ontario (ONT) starting at $ 145*
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1 Passenger, Economy
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today
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Fly from Ontario and get United's best fares
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Ontario (ONT)to
San Francisco (SFO)12/11/25 - 12/15/25from$Â 187Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Houston (IAH)01/24/26 - 01/28/26from$Â 163Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Denver (DEN)02/07/26 - 02/11/26from$Â 145Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Chicago (ORD)02/27/26 - 03/03/26from$Â 232Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Orlando (MCO)02/21/26 - 02/24/26from$Â 227Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Newark/New York (EWR)01/31/26 - 02/03/26from$Â 311Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Miami (MIA)01/21/26 - 01/28/26from$Â 227Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
San Salvador (SAL)01/24/26 - 02/07/26from$Â 374Viewed: 5 hours agoRoundtripEconomy
Ontario (ONT)to
Honolulu (HNL)01/26/26 - 02/02/26from$Â 269Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Dallas (DFW)01/06/26 - 01/10/26from$Â 217Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Cancun (CUN)01/27/26 - 02/03/26from$Â 337Viewed: 8 hours agoRoundtripEconomy
Ontario (ONT)to
Nashville (BNA)02/07/26 - 02/14/26from$Â 237Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Fort Lauderdale (FLL)02/28/26 - 03/03/26from$Â 257Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Arcata (ACV)01/28/26 - 02/01/26from$Â 244Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Raleigh (RDU)02/03/26 - 02/10/26from$Â 243Viewed: 16 hours agoRoundtripEconomyOntario (ONT)to
Newark/New York (LGA)02/03/26 - 02/06/26from$Â 207Viewed: 10 hours agoRoundtripEconomy
Ontario (ONT)to
Seattle (SEA)02/03/26 - 02/07/26from$Â 177Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Portland, OR (PDX)02/03/26 - 02/07/26from$Â 147Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Charlotte (CLT)02/03/26 - 02/10/26from$Â 292Viewed: 16 hours agoRoundtripEconomy
Ontario (ONT)to
Las Vegas (LAS)02/03/26 - 02/10/26from$Â 159Viewed: 16 hours agoRoundtripEconomy
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
United popular flights from Ontario (ONT)
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Ontario (ONT) | San Francisco (SFO) | Roundtrip | Economy | 12/11/25 - 12/15/25 | from $Â 187 Viewed: 16 hours ago |
| Ontario (ONT) | Houston (IAH) | Roundtrip | Economy | 02/18/26 - 02/25/26 | from $Â 163 Viewed: 16 hours ago |
| Ontario (ONT) | Denver (DEN) | Roundtrip | Economy | 02/07/26 - 02/11/26 | from $Â 145 Viewed: 16 hours ago |
| Ontario (ONT) | Chicago (ORD) | Roundtrip | Economy | 01/17/26 - 01/21/26 | from $Â 232 Viewed: 16 hours ago |
| Ontario (ONT) | Orlando (MCO) | Roundtrip | Economy | 02/10/26 - 02/14/26 | from $Â 227 Viewed: 16 hours ago |
| Ontario (ONT) | Newark/New York (EWR) | Roundtrip | Economy | 01/31/26 - 02/03/26 | from $Â 311 Viewed: 16 hours ago |
| Ontario (ONT) | Miami (MIA) | Roundtrip | Economy | 02/03/26 - 02/10/26 | from $Â 227 Viewed: 16 hours ago |
| Ontario (ONT) | San Salvador (SAL) | Roundtrip | Economy | 01/24/26 - 02/07/26 | from $Â 374 Viewed: 5 hours ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.