Flights from Ontario (ONT) starting at $ 157*
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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)03/02/26 - 03/03/26from$Â 192Viewed: 19 hours agoRoundtripEconomy
Ontario (ONT)to
Denver (DEN)03/07/26 - 03/11/26from$Â 157Viewed: 12 hours agoRoundtripEconomy
Ontario (ONT)to
Houston (IAH)03/07/26 - 03/11/26from$Â 333Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Chicago (ORD)04/15/26 - 04/18/26from$Â 366Viewed: 1 day agoRoundtripEconomy
Ontario (ONT)to
Nashville (BNA)03/06/26 - 03/10/26from$Â 285Viewed: 12 hours agoRoundtripEconomy
Ontario (ONT)to
Orlando (MCO)03/01/26 - 03/04/26from$Â 357Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Seattle (SEA)04/07/26 - 04/14/26from$Â 177Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Newark/New York (EWR)02/18/26 - 02/21/26from$Â 293Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Miami (MIA)02/10/26 - 02/14/26from$Â 317Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Boston (BOS)04/18/26 - 04/25/26from$Â 255Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Honolulu (HNL)03/03/26 - 03/10/26from$Â 336Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Dallas (DFW)02/24/26 - 02/27/26from$Â 259Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Taipei (TPE)04/19/26 - 04/23/26from$Â 768Viewed: 4 hours agoRoundtripEconomy
Ontario (ONT)to
Sacramento (SMF)02/24/26 - 02/25/26from$Â 189Viewed: 1 day agoRoundtripEconomy
Ontario (ONT)to
Burlington (BTV)04/15/26 - 04/22/26from$Â 322Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Chattanooga (CHA)04/08/26 - 04/11/26from$Â 309Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Fort Lauderdale (FLL)03/04/26 - 03/11/26from$Â 313Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Phoenix (PHX)02/21/26 - 02/24/26from$Â 191Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Atlanta (ATL)04/01/26 - 04/08/26from$Â 415Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Austin (AUS)04/18/26 - 04/25/26from$Â 323Viewed: 7 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 | 03/31/26 - 04/04/26 | from $Â 192 Viewed: 19 hours ago |
| Ontario (ONT) | Denver (DEN) | Roundtrip | Economy | 03/07/26 - 03/11/26 | from $Â 157 Viewed: 12 hours ago |
| Ontario (ONT) | Houston (IAH) | Roundtrip | Economy | 03/05/26 - 03/09/26 | from $Â 333 Viewed: 11 hours ago |
| Ontario (ONT) | Chicago (ORD) | Roundtrip | Economy | 05/13/26 - 05/16/26 | from $Â 366 Viewed: 1 day ago |
| Ontario (ONT) | Nashville (BNA) | Roundtrip | Economy | 03/06/26 - 03/10/26 | from $Â 285 Viewed: 12 hours ago |
| Ontario (ONT) | Orlando (MCO) | Roundtrip | Economy | 02/21/26 - 02/24/26 | from $Â 357 Viewed: 11 hours ago |
| Ontario (ONT) | Seattle (SEA) | Roundtrip | Economy | 04/08/26 - 04/15/26 | from $Â 177 Viewed: 11 hours ago |
| Ontario (ONT) | Newark/New York (EWR) | Roundtrip | Economy | 02/18/26 - 02/21/26 | from $Â 293 Viewed: 11 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.