Flights from Ontario (ONT) starting at $ 137*
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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)06/03/26 - 06/10/26from$ 137Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Denver (DEN)05/26/26 - 06/02/26from$ 169Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Chicago (ORD)08/18/26 - 08/19/26from$ 199Viewed: 1 day agoRoundtripEconomy
Ontario (ONT)to
Houston (IAH)05/16/26 - 05/19/26from$ 274Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Newark/New York (EWR)05/23/26 - 05/27/26from$ 307Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Seattle (SEA)05/16/26 - 05/19/26from$ 217Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Orlando (MCO)06/03/26 - 06/10/26from$ 351Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Miami (MIA)07/08/26 - 07/15/26from$ 327Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Burlington (BTV)05/30/26 - 06/03/26from$ 357Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Maui (OGG)05/26/26 - 06/02/26from$ 434Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Honolulu (HNL)05/12/26 - 05/19/26from$ 396Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Dallas (DFW)06/03/26 - 06/10/26from$ 313Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Cancun (CUN)05/24/26 - 05/28/26from$ 506Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
San Salvador (SAL)04/25/26 - 05/02/26from$ 511Viewed: 1 hour agoRoundtripEconomy
Ontario (ONT)to
London (LHR)05/06/26 - 05/13/26from$ 925Viewed: 11 hours agoRoundtripEconomy
Ontario (ONT)to
Nashville (BNA)07/07/26 - 07/14/26from$ 321Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Boston (BOS)05/06/26 - 05/09/26from$ 292Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Las Vegas (LAS)05/20/26 - 05/27/26from$ 187Viewed: 17 hours agoRoundtripEconomy
Ontario (ONT)to
Washington, D.C. (IAD)07/07/26 - 07/14/26from$ 321Viewed: 2 hours agoRoundtripEconomy
Ontario (ONT)to
Vancouver (YVR)06/09/26 - 06/13/26from$ 298Viewed: 11 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 | 06/02/26 - 06/09/26 | from $ 137 Viewed: 17 hours ago |
| Ontario (ONT) | Denver (DEN) | Roundtrip | Economy | 06/02/26 - 06/09/26 | from $ 169 Viewed: 17 hours ago |
| Ontario (ONT) | Chicago (ORD) | Roundtrip | Economy | 08/18/26 - 08/19/26 | from $ 199 Viewed: 1 day ago |
| Ontario (ONT) | Houston (IAH) | Roundtrip | Economy | 05/16/26 - 05/19/26 | from $ 274 Viewed: 17 hours ago |
| Ontario (ONT) | Newark/New York (EWR) | Roundtrip | Economy | 05/23/26 - 05/27/26 | from $ 307 Viewed: 17 hours ago |
| Ontario (ONT) | Seattle (SEA) | Roundtrip | Economy | 06/03/26 - 06/06/26 | from $ 217 Viewed: 17 hours ago |
| Ontario (ONT) | Orlando (MCO) | Roundtrip | Economy | 06/03/26 - 06/10/26 | from $ 351 Viewed: 17 hours ago |
| Ontario (ONT) | Miami (MIA) | Roundtrip | Economy | 05/27/26 - 06/03/26 | from $ 327 Viewed: 17 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.