United flights to Ontario from $ 156*

United's most popular flights to Ontario (ONT)

$
Select travel class

Denver (DEN)to

Ontario (ONT)
01/15/25 - 01/22/25
from
$ 157*
Viewed: 1 day ago
Roundtrip
|
Economy

San Francisco (SFO)to

Ontario (ONT)
01/16/25 - 01/19/25
from
$ 159*
Viewed: 18 hours ago
Roundtrip
|
Economy

New York/Newark (EWR)to

Ontario (ONT)
01/11/25 - 01/18/25
from
$ 266*
Viewed: 23 hours ago
Roundtrip
|
Economy

Portland, OR (PDX)to

Ontario (ONT)
01/11/25 - 01/14/25
from
$ 156*
Viewed: 20 hours ago
Roundtrip
|
Economy

Pittsburgh (PIT)to

Ontario (ONT)
01/11/25 - 01/14/25
from
$ 328*
Viewed: 20 hours ago
Roundtrip
|
Economy

Washington, D.C. (IAD)to

Ontario (ONT)
01/14/25 - 01/21/25
from
$ 341*
Viewed: 8 minutes ago
Roundtrip
|
Economy

Nashville (BNA)to

Ontario (ONT)
01/16/25 - 01/19/25
from
$ 256*
Viewed: 1 day ago
Roundtrip
|
Economy

Orlando (MCO)to

Ontario (ONT)
01/14/25 - 01/21/25
from
$ 346*
Viewed: 22 hours ago
Roundtrip
|
Economy

Redmond (RDM)to

Ontario (ONT)
01/16/25 - 01/20/25
from
$ 278*
Viewed: 19 hours ago
Roundtrip
|
Economy

Reno (RNO)to

Ontario (ONT)
01/14/25 - 01/18/25
from
$ 209*
Viewed: 20 hours ago
Roundtrip
|
Economy

Washington, D.C. (DCA)to

Ontario (ONT)
01/14/25 - 01/21/25
from
$ 341*
Viewed: 12 minutes ago
Roundtrip
|
Economy

Chicago (ORD)to

Ontario (ONT)
01/15/25 - 01/22/25
from
$ 246*
Viewed: 20 hours ago
Roundtrip
|
Economy

Colorado Springs (COS)to

Ontario (ONT)
01/08/25 - 01/15/25
from
$ 334*
Viewed: 1 day ago
Roundtrip
|
Economy

Cincinnati (CVG)to

Ontario (ONT)
01/11/25 - 01/15/25
from
$ 298*
Viewed: 1 day ago
Roundtrip
|
Economy

Phoenix (PHX)to

Ontario (ONT)
01/16/25 - 01/23/25
from
$ 345*
Viewed: 20 hours ago
Roundtrip
|
Economy

Saint Louis (STL)to

Ontario (ONT)
01/11/25 - 01/18/25
from
$ 298*
Viewed: 16 hours ago
Roundtrip
|
Economy

Seattle (SEA)to

Ontario (ONT)
01/07/25 - 01/11/25
from
$ 176*
Viewed: 20 hours ago
Roundtrip
|
Economy

Pensacola (PNS)to

Ontario (ONT)
01/08/25 - 01/15/25
from
$ 356*
Viewed: 16 hours ago
Roundtrip
|
Economy

Tampa (TPA)to

Ontario (ONT)
01/14/25 - 01/21/25
from
$ 304*
Viewed: 18 hours ago
Roundtrip
|
Economy

Dallas (DFW)to

Ontario (ONT)
01/11/25 - 01/14/25
from
$ 218*
Viewed: 23 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)

$

Denver (DEN)to

Ontario (ONT)
01/15/25 - 01/21/25

Roundtrip

|

Business

from
$ 417*
Viewed: 4 hours ago

San Francisco (SFO)to

Ontario (ONT)
01/16/25 - 01/18/25

Roundtrip

|

Business

from
$ 357*
Viewed: 20 hours ago

New York/Newark (EWR)to

Ontario (ONT)
01/09/25 - 01/13/25

Roundtrip

|

Business

from
$ 1,111*
Viewed: 8 hours ago

Portland, OR (PDX)to

Ontario (ONT)
01/15/25 - 01/19/25

Roundtrip

|

Business

from
$ 704*
Viewed: 7 hours ago

Pittsburgh (PIT)to

Ontario (ONT)
01/14/25 - 01/24/25

Roundtrip

|

Business

from
$ 1,132*
Viewed: 15 hours ago

Washington, D.C. (IAD)to

Ontario (ONT)
01/03/25 - 01/04/25

Roundtrip

|

Business

from
$ 1,462*
Viewed: 13 hours ago

Orlando (MCO)to

Ontario (ONT)
12/25/24 - 12/31/24

Roundtrip

|

Business

from
$ 1,345*
Viewed: 21 hours ago

Washington, D.C. (DCA)to

Ontario (ONT)
01/01/25 - 01/06/25

Roundtrip

|

Business

from
$ 1,372*
Viewed: 10 hours ago

Honolulu (HNL)to

Ontario (ONT)
12/17/24 - 12/19/24

Roundtrip

|

Business

from
$ 1,699*
Viewed: 6 hours ago

Chicago (ORD)to

Ontario (ONT)
01/15/25 - 01/18/25

Roundtrip

|

Business

from
$ 856*
Viewed: 23 hours ago

Nashville (BNA)to

Ontario (ONT)
01/09/25 - 01/10/25

Roundtrip

|

Business

from
$ 996*
Viewed: 7 hours ago

Colorado Springs (COS)to

Ontario (ONT)
12/18/24 - 12/19/24

Roundtrip

|

Business

from
$ 1,167*
Viewed: 5 hours ago

Seattle (SEA)to

Ontario (ONT)
01/07/25 - 01/11/25

Roundtrip

|

Business

from
$ 606*
Viewed: 20 hours ago

Phoenix (PHX)to

Ontario (ONT)
12/25/24 - 12/25/24

Roundtrip

|

Business

from
$ 1,630*
Viewed: 8 minutes ago

Pensacola (PNS)to

Ontario (ONT)
12/27/24 - 01/01/25

Roundtrip

|

Business

from
$ 1,926*
Viewed: 7 hours ago

Tampa (TPA)to

Ontario (ONT)
12/29/24 - 01/04/25

Roundtrip

|

Business

from
$ 1,603*
Viewed: 22 hours ago

Hartford (BDL)to

Ontario (ONT)
12/23/24 - 01/05/25

Roundtrip

|

Business

from
$ 1,590*
Viewed: 2 hours ago

Dallas (DFW)to

Ontario (ONT)
12/19/24 - 12/23/24

Roundtrip

|

Business

from
$ 1,296*
Viewed: 6 minutes ago

Atlanta (ATL)to

Ontario (ONT)
12/27/24 - 12/30/24

Roundtrip

|

Business

from
$ 1,716*
Viewed: 10 hours ago

Las Vegas (LAS)to

Ontario (ONT)
12/23/24 - 12/26/24

Roundtrip

|

Business

from
$ 1,336*
Viewed: 1 hour 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
FromDenver (DEN)ToOntario (ONT)Roundtrip
|
Economy
03/01/25 - 03/04/25

from

$ 157*

Viewed: 1 day ago

FromSan Francisco (SFO)ToOntario (ONT)Roundtrip
|
Economy
01/30/25 - 02/02/25

from

$ 159*

Viewed: 18 hours ago

FromNew York/Newark (EWR)ToOntario (ONT)Roundtrip
|
Economy
01/18/25 - 01/22/25

from

$ 266*

Viewed: 23 hours ago

FromPortland, OR (PDX)ToOntario (ONT)Roundtrip
|
Economy
02/01/25 - 02/04/25

from

$ 156*

Viewed: 20 hours ago

FromPittsburgh (PIT)ToOntario (ONT)Roundtrip
|
Economy
01/18/25 - 01/21/25

from

$ 328*

Viewed: 20 hours ago

FromWashington, D.C. (IAD)ToOntario (ONT)Roundtrip
|
Economy
02/19/25 - 02/22/25

from

$ 336*

Viewed: 8 minutes ago

FromNashville (BNA)ToOntario (ONT)Roundtrip
|
Economy
02/01/25 - 02/04/25

from

$ 256*

Viewed: 1 day ago

FromOrlando (MCO)ToOntario (ONT)Roundtrip
|
Economy
02/19/25 - 02/26/25

from

$ 346*

Viewed: 22 hours ago

FromRedmond (RDM)ToOntario (ONT)Roundtrip
|
Economy
02/18/25 - 02/22/25

from

$ 235*

Viewed: 19 hours ago

FromReno (RNO)ToOntario (ONT)Roundtrip
|
Economy
01/21/25 - 01/25/25

from

$ 204*

Viewed: 20 hours ago

FromWashington, D.C. (DCA)ToOntario (ONT)Roundtrip
|
Economy
01/18/25 - 01/25/25

from

$ 336*

Viewed: 12 minutes ago

FromChicago (ORD)ToOntario (ONT)Roundtrip
|
Economy
03/03/25 - 03/06/25

from

$ 246*

Viewed: 20 hours ago

FromColorado Springs (COS)ToOntario (ONT)Roundtrip
|
Economy
02/05/25 - 02/12/25

from

$ 334*

Viewed: 1 day ago

FromCincinnati (CVG)ToOntario (ONT)Roundtrip
|
Economy
02/11/25 - 02/15/25

from

$ 298*

Viewed: 1 day ago

FromPhoenix (PHX)ToOntario (ONT)Roundtrip
|
Economy
02/27/25 - 03/03/25

from

$ 325*

Viewed: 20 hours ago

FromSaint Louis (STL)ToOntario (ONT)Roundtrip
|
Economy
02/15/25 - 02/19/25

from

$ 298*

Viewed: 16 hours ago

FromSeattle (SEA)ToOntario (ONT)Roundtrip
|
Economy
02/18/25 - 02/21/25

from

$ 186*

Viewed: 19 hours ago

FromPensacola (PNS)ToOntario (ONT)Roundtrip
|
Economy
01/22/25 - 01/29/25

from

$ 356*

Viewed: 16 hours ago

FromTampa (TPA)ToOntario (ONT)Roundtrip
|
Economy
02/15/25 - 02/22/25

from

$ 298*

Viewed: 18 hours ago

FromDallas (DFW)ToOntario (ONT)Roundtrip
|
Economy
01/18/25 - 01/22/25

from

$ 218*

Viewed: 23 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.

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