Flights from Ontario (ONT) starting at $ 117*
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1 Passenger, Economy
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today
today
Fly from Ontario and get United's best fares
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Ontario (ONT)to
San Francisco (SFO)04/07/26 - 04/08/26from$Â 117Viewed: 21 hours agoRoundtripEconomy
Ontario (ONT)to
Houston (IAH)04/30/26 - 05/03/26from$Â 237Viewed: 22 hours agoRoundtripEconomy
Ontario (ONT)to
Denver (DEN)05/18/26 - 05/20/26from$Â 168Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Chicago (ORD)04/21/26 - 04/28/26from$Â 323Viewed: 51 minutes agoRoundtripEconomy
Ontario (ONT)to
Newark/New York (EWR)04/01/26 - 04/10/26from$Â 287Viewed: 19 hours agoRoundtripEconomy
Ontario (ONT)to
Nashville (BNA)03/18/26 - 03/21/26from$Â 257Viewed: 22 hours agoRoundtripEconomy
Ontario (ONT)to
Dallas (DFW)05/05/26 - 05/12/26from$Â 343Viewed: 22 hours agoRoundtripEconomy
Ontario (ONT)to
Boston (BOS)04/19/26 - 04/22/26from$Â 274Viewed: 21 hours agoRoundtripEconomy
Ontario (ONT)to
Taipei (TPE)03/08/26 - 03/12/26from$Â 848Viewed: 15 hours agoRoundtripEconomy
Ontario (ONT)to
Miami (MIA)05/06/26 - 05/13/26from$Â 341Viewed: 18 hours agoRoundtripEconomy
Ontario (ONT)to
Honolulu (HNL)04/22/26 - 04/29/26from$Â 336Viewed: 22 hours agoRoundtripEconomy
Ontario (ONT)to
Orlando (MCO)04/23/26 - 04/28/26from$Â 326Viewed: 15 hours agoRoundtripEconomy
Ontario (ONT)to
Baltimore (BWI)05/06/26 - 05/10/26from$Â 257Viewed: 1 day agoRoundtripEconomy
Ontario (ONT)to
Las Vegas (LAS)04/01/26 - 04/04/26from$Â 188Viewed: 15 hours agoRoundtripEconomy
Ontario (ONT)to
Seattle (SEA)04/18/26 - 04/22/26from$Â 197Viewed: 22 hours agoRoundtripEconomy
Ontario (ONT)to
Austin (AUS)05/01/26 - 05/04/26from$Â 232Viewed: 18 hours agoRoundtripEconomyOntario (ONT)to
Newark/New York (LGA)05/02/26 - 05/06/26from$Â 272Viewed: 7 hours agoRoundtripEconomy
Ontario (ONT)to
Greenville (GSP)05/05/26 - 05/12/26from$Â 367Viewed: 18 hours agoRoundtripEconomy
Ontario (ONT)to
Philadelphia (PHL)04/11/26 - 04/15/26from$Â 342Viewed: 7 hours agoRoundtripEconomy
Ontario (ONT)to
Monterey (MRY)04/10/26 - 04/14/26from$Â 259Viewed: 22 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 | 04/07/26 - 04/08/26 | from $Â 117 Viewed: 21 hours ago |
| Ontario (ONT) | Houston (IAH) | Roundtrip | Economy | 04/20/26 - 04/24/26 | from $Â 237 Viewed: 22 hours ago |
| Ontario (ONT) | Denver (DEN) | Roundtrip | Economy | 05/18/26 - 05/20/26 | from $Â 168 Viewed: 17 hours ago |
| Ontario (ONT) | Chicago (ORD) | Roundtrip | Economy | 04/21/26 - 04/28/26 | from $Â 323 Viewed: 51 minutes ago |
| Ontario (ONT) | Newark/New York (EWR) | Roundtrip | Economy | 04/01/26 - 04/10/26 | from $Â 287 Viewed: 19 hours ago |
| Ontario (ONT) | Nashville (BNA) | Roundtrip | Economy | 04/04/26 - 04/08/26 | from $Â 257 Viewed: 22 hours ago |
| Ontario (ONT) | Dallas (DFW) | Roundtrip | Economy | 04/07/26 - 04/14/26 | from $Â 343 Viewed: 22 hours ago |
| Ontario (ONT) | Boston (BOS) | Roundtrip | Economy | 05/11/26 - 05/14/26 | from $Â 274 Viewed: 21 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.