Skip to content

Get United's best fares today on flights to Ontario from *

Select journey type

Enter to select travel class and passengers

Best Business Class fares on flights to Ontario (ONT)

Agana, Guam(GUM)to
toOntario(ONT)
01/18/2020
-
02/01/2020
Roundtrip
Disclaimer including text and Terms & Conditions

Best Business Class fares on flights to Ontario (ONT)

Agana, Guam(GUM)to
toOntario(ONT)
01/15/2020
-
01/22/2020
Roundtrip
Disclaimer including text and Terms & Conditions

Things to do in Ontario

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.

Weather in Ontario

Saturday light rain
11°C 12/14/2019
Sunday broken clouds
14°C 12/15/2019
Monday sky is clear
15°C 12/16/2019
Tuesday overcast clouds
13°C 12/17/2019
Wednesday broken clouds
13°C 12/18/2019
Thursday sky is clear
14°C 12/19/2019
Friday overcast clouds
15°C 12/20/2019
Powered by: OpenWeatherMap.org

Search for more flights to Ontario (ONT)

FromToDatesFare TypePrice

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/18/2020

Return: 02/25/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/16/2020

Return: 02/23/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/17/2020

Return: 02/24/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/19/2020

Return: 02/26/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/21/2020

Return: 02/28/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/22/2020

Return: 02/29/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/25/2020

Return: 03/03/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/24/2020

Return: 03/02/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 03/01/2020

Return: 03/08/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

Agana, Guam (GUM)

Ontario (ONT)

Depart: 02/27/2020

Return: 03/05/2020

Roundtrip
from
USD1,333*
Viewed:4hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. 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.