United flights to Ontario from $ 67*
United's most popular flights to Ontario (ONT)
San Francisco (SFO)to
Ontario (ONT)Denver (DEN)to
Ontario (ONT)New York/Newark (EWR)to
Ontario (ONT)Redding (RDD)to
Ontario (ONT)Chicago (ORD)to
Ontario (ONT)Boston (BOS)to
Ontario (ONT)Fort Lauderdale (FLL)to
Ontario (ONT)Washington, D.C. (IAD)to
Ontario (ONT)Houston (IAH)to
Ontario (ONT)Atlanta (ATL)to
Ontario (ONT)New York/Newark (LGA)to
Ontario (ONT)Portland, OR (PDX)to
Ontario (ONT)Sacramento (SMF)to
Ontario (ONT)Tampa (TPA)to
Ontario (ONT)Miami (MIA)to
Ontario (ONT)Maui (OGG)to
Ontario (ONT)Eugene (EUG)to
Ontario (ONT)Dallas (DFW)to
Ontario (ONT)Orlando (MCO)to
Ontario (ONT)Boise (BOI)to
Ontario (ONT)*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.
Business class deals on flights to Ontario (ONT)
San Francisco (SFO)to
Roundtrip
Business
New York/Newark (LGA)to
Roundtrip
Business
Cleveland (CLE)to
Roundtrip
Business
Denver (DEN)to
Roundtrip
Business
New York/Newark (EWR)to
Roundtrip
Business
Redding (RDD)to
Roundtrip
Business
Chicago (ORD)to
Roundtrip
Business
Raleigh (RDU)to
Roundtrip
Business
Boston (BOS)to
Roundtrip
Business
Washington, D.C. (IAD)to
Roundtrip
Business
Houston (IAH)to
Roundtrip
Business
Atlanta (ATL)to
Roundtrip
Business
Portland, OR (PDX)to
Roundtrip
Business
Sacramento (SMF)to
Roundtrip
Business
Tampa (TPA)to
Roundtrip
Business
Detroit (DTW)to
Roundtrip
Business
Eugene (EUG)to
Roundtrip
Business
Dallas (DFW)to
Roundtrip
Business
Saginaw (MBS)to
Roundtrip
Business
Baltimore (BWI)to
Roundtrip
Business
*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.
Things to do after your flight to Ontario (ONT)
Fly to Ontario with United Airlines from over 200 airports within the United States and an additional 100 airports internationally.
Ontario’s top attractions
- Visit the Ontario Museum of History and Art for an overview of the region.
- Tour the grand Graber Olive House, home to the oldest operating olive packer in the U.S.
- Shop till you drop at Ontario Mills.
- Take the family to Scandia Ontario, an amusement park with rides, mini golf, go karts and games.
- Head to iFLY Ontario for an indoor skydiving experience.
- Relax on the beaches in nearby Los Angeles County.
Best time to travel to Ontario
Visit Ontario during the summer and fall for sunny and dry weather. The Los Angeles County Fair is held for four weeks each fall, beginning on Labor Day. Taste diverse food and drinks from near and far, see farm animals, learn more about agriculture and enjoy live entertainment. The Lights on Miracle Hill in nearby Walnut is the perfect winter warm up for the holidays.
Find more flights to Ontario (ONT) with United
From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| FromSan Francisco (SFO) | ToOntario (ONT) | Roundtrip | Economy | 03/01/25 - 03/01/25 | from $ 81* Viewed: 18 hours ago |
| FromDenver (DEN) | ToOntario (ONT) | Roundtrip | Economy | 02/19/25 - 02/25/25 | from $ 157* Viewed: 11 hours ago |
| FromNew York/Newark (EWR) | ToOntario (ONT) | Roundtrip | Economy | 02/25/25 - 03/04/25 | from $ 287* Viewed: 18 hours ago |
| FromRedding (RDD) | ToOntario (ONT) | Roundtrip | Economy | 03/19/25 - 03/26/25 | from $ 244* Viewed: 9 hours ago |
| FromChicago (ORD) | ToOntario (ONT) | Roundtrip | Economy | 02/22/25 - 02/25/25 | from $ 247* Viewed: 10 hours ago |
| FromBoston (BOS) | ToOntario (ONT) | Roundtrip | Economy | 02/22/25 - 03/01/25 | from $ 294* Viewed: 14 hours ago |
| FromFort Lauderdale (FLL) | ToOntario (ONT) | Roundtrip | Economy | 04/09/25 - 04/16/25 | from $ 337* Viewed: 12 hours ago |
| FromWashington, D.C. (IAD) | ToOntario (ONT) | Roundtrip | Economy | 04/01/25 - 04/08/25 | from $ 327* Viewed: 16 hours ago |
| FromHouston (IAH) | ToOntario (ONT) | Roundtrip | Economy | 04/16/25 - 04/23/25 | from $ 227* Viewed: 11 hours ago |
| FromAtlanta (ATL) | ToOntario (ONT) | Roundtrip | Economy | 04/16/25 - 04/19/25 | from $ 417* Viewed: 15 hours ago |
| FromSacramento (SMF) | ToOntario (ONT) | Roundtrip | Economy | 04/09/25 - 04/13/25 | from $ 259* Viewed: 8 hours ago |
| FromNew York/Newark (LGA) | ToOntario (ONT) | Roundtrip | Economy | 02/19/25 - 02/26/25 | from $ 282* Viewed: 15 hours ago |
| FromPortland, OR (PDX) | ToOntario (ONT) | Roundtrip | Economy | 02/18/25 - 02/25/25 | from $ 157* Viewed: 10 hours ago |
| FromMiami (MIA) | ToOntario (ONT) | Roundtrip | Economy | 04/16/25 - 04/23/25 | from $ 373* Viewed: 6 hours ago |
| FromMaui (OGG) | ToOntario (ONT) | Roundtrip | Economy | 03/04/25 - 03/11/25 | from $ 294* Viewed: 6 hours ago |
| FromTampa (TPA) | ToOntario (ONT) | Roundtrip | Economy | 04/09/25 - 04/16/25 | from $ 327* Viewed: 8 hours ago |
| FromDallas (DFW) | ToOntario (ONT) | Roundtrip | Economy | 04/16/25 - 04/23/25 | from $ 237* Viewed: 13 hours ago |
| FromEugene (EUG) | ToOntario (ONT) | Roundtrip | Economy | 02/18/25 - 02/22/25 | from $ 241* Viewed: 13 hours ago |
| FromSaginaw (MBS) | ToOntario (ONT) | Roundtrip | Economy | 03/04/25 - 03/11/25 | from $ 299* Viewed: 6 hours ago |
| FromMilwaukee (MKE) | ToOntario (ONT) | Roundtrip | Economy | 03/04/25 - 03/08/25 | from $ 343* Viewed: 10 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.
