United flights to Ontario from $ 67*

United's most popular flights to Ontario (ONT)

$
Select travel class

San Francisco (SFO)to

Ontario (ONT)
01/29/25 - 02/01/25
from
$ 67*
Viewed: 8 hours ago
Roundtrip
|
Economy

Denver (DEN)to

Ontario (ONT)
02/15/25 - 02/21/25
from
$ 177*
Viewed: 10 hours ago
Roundtrip
|
Economy

New York/Newark (EWR)to

Ontario (ONT)
02/04/25 - 02/11/25
from
$ 258*
Viewed: 12 hours ago
Roundtrip
|
Economy

Redding (RDD)to

Ontario (ONT)
02/11/25 - 02/15/25
from
$ 244*
Viewed: 9 hours ago
Roundtrip
|
Economy

Chicago (ORD)to

Ontario (ONT)
02/11/25 - 02/15/25
from
$ 264*
Viewed: 10 hours ago
Roundtrip
|
Economy

Boston (BOS)to

Ontario (ONT)
02/05/25 - 02/12/25
from
$ 297*
Viewed: 14 hours ago
Roundtrip
|
Economy

Fort Lauderdale (FLL)to

Ontario (ONT)
02/05/25 - 02/09/25
from
$ 347*
Viewed: 12 hours ago
Roundtrip
|
Economy

Washington, D.C. (IAD)to

Ontario (ONT)
01/29/25 - 02/01/25
from
$ 327*
Viewed: 16 hours ago
Roundtrip
|
Economy

Houston (IAH)to

Ontario (ONT)
02/04/25 - 02/11/25
from
$ 317*
Viewed: 11 hours ago
Roundtrip
|
Economy

Atlanta (ATL)to

Ontario (ONT)
02/13/25 - 02/16/25
from
$ 447*
Viewed: 15 hours ago
Roundtrip
|
Economy

New York/Newark (LGA)to

Ontario (ONT)
02/03/25 - 02/06/25
from
$ 229*
Viewed: 15 hours ago
Roundtrip
|
Economy

Portland, OR (PDX)to

Ontario (ONT)
02/05/25 - 02/12/25
from
$ 157*
Viewed: 10 hours ago
Roundtrip
|
Economy

Sacramento (SMF)to

Ontario (ONT)
01/17/25 - 01/20/25
from
$ 206*
Viewed: 16 hours ago
Roundtrip
|
Economy

Tampa (TPA)to

Ontario (ONT)
02/14/25 - 02/18/25
from
$ 327*
Viewed: 8 hours ago
Roundtrip
|
Economy

Miami (MIA)to

Ontario (ONT)
02/14/25 - 02/18/25
from
$ 381*
Viewed: 6 hours ago
Roundtrip
|
Economy

Maui (OGG)to

Ontario (ONT)
01/28/25 - 02/04/25
from
$ 277*
Viewed: 6 hours ago
Roundtrip
|
Economy

Eugene (EUG)to

Ontario (ONT)
02/11/25 - 02/15/25
from
$ 241*
Viewed: 13 hours ago
Roundtrip
|
Economy

Dallas (DFW)to

Ontario (ONT)
02/04/25 - 02/11/25
from
$ 254*
Viewed: 13 hours ago
Roundtrip
|
Economy

Orlando (MCO)to

Ontario (ONT)
02/08/25 - 02/11/25
from
$ 347*
Viewed: 11 hours ago
Roundtrip
|
Economy

Boise (BOI)to

Ontario (ONT)
02/11/25 - 02/15/25
from
$ 233*
Viewed: 14 hours ago
Roundtrip
|
Economy

*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

Ontario (ONT)
01/29/25 - 01/30/25

Roundtrip

|

Business

from
$ 237*
Viewed: 9 hours ago

New York/Newark (LGA)to

Ontario (ONT)
01/18/25 - 01/21/25

Roundtrip

|

Business

from
$ 1,507*
Viewed: 4 hours ago

Cleveland (CLE)to

Ontario (ONT)
02/01/25 - 02/04/25

Roundtrip

|

Business

from
$ 1,107*
Viewed: 2 hours ago

Denver (DEN)to

Ontario (ONT)
02/08/25 - 02/22/25

Roundtrip

|

Business

from
$ 437*
Viewed: 11 hours ago

New York/Newark (EWR)to

Ontario (ONT)
02/11/25 - 02/13/25

Roundtrip

|

Business

from
$ 1,138*
Viewed: 16 hours ago

Redding (RDD)to

Ontario (ONT)
02/05/25 - 02/20/25

Roundtrip

|

Business

from
$ 567*
Viewed: 16 hours ago

Chicago (ORD)to

Ontario (ONT)
02/08/25 - 02/15/25

Roundtrip

|

Business

from
$ 874*
Viewed: 16 hours ago

Raleigh (RDU)to

Ontario (ONT)
02/10/25 - 02/12/25

Roundtrip

|

Business

from
$ 1,142*
Viewed: 1 hour ago

Boston (BOS)to

Ontario (ONT)
02/11/25 - 02/14/25

Roundtrip

|

Business

from
$ 1,183*
Viewed: 1 day ago

Washington, D.C. (IAD)to

Ontario (ONT)
02/11/25 - 02/20/25

Roundtrip

|

Business

from
$ 1,087*
Viewed: 12 hours ago

Houston (IAH)to

Ontario (ONT)
02/04/25 - 02/12/25

Roundtrip

|

Business

from
$ 787*
Viewed: 1 day ago

Atlanta (ATL)to

Ontario (ONT)
01/31/25 - 02/02/25

Roundtrip

|

Business

from
$ 1,359*
Viewed: 19 hours ago

Portland, OR (PDX)to

Ontario (ONT)
01/29/25 - 02/02/25

Roundtrip

|

Business

from
$ 813*
Viewed: 14 hours ago

Sacramento (SMF)to

Ontario (ONT)
01/17/25 - 01/20/25

Roundtrip

|

Business

from
$ 476*
Viewed: 16 hours ago

Tampa (TPA)to

Ontario (ONT)
01/22/25 - 01/29/25

Roundtrip

|

Business

from
$ 1,300*
Viewed: 1 day ago

Detroit (DTW)to

Ontario (ONT)
02/02/25 - 02/08/25

Roundtrip

|

Business

from
$ 1,132*
Viewed: 4 hours ago

Eugene (EUG)to

Ontario (ONT)
02/03/25 - 02/07/25

Roundtrip

|

Business

from
$ 1,087*
Viewed: 21 hours ago

Dallas (DFW)to

Ontario (ONT)
02/02/25 - 02/02/25

Roundtrip

|

Business

from
$ 1,123*
Viewed: 15 hours ago

Saginaw (MBS)to

Ontario (ONT)
02/02/25 - 02/08/25

Roundtrip

|

Business

from
$ 1,367*
Viewed: 12 hours ago

Baltimore (BWI)to

Ontario (ONT)
01/25/25 - 02/08/25

Roundtrip

|

Business

from
$ 1,363*
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.

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

$
Select travel class
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.

United Airlines New Dreamliner Livery