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Ontario

$159+ Cheap flights from Westchester County to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
HPN — ONT
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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Find flight deals from Westchester County to Ontario

Cheapest flights from Westchester County to Ontario
Explore the most affordable flight options available from Westchester County to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 18, 2025.

This American Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:00 amHPN - ONT
2 stops13h 02mAmerican Airlines
Sat 12/207:18 pmONT - HPN
2 stops12h 16mAmerican Airlines
Deal found 11/17$327
This American Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amHPN - ONT
2 stops12h 02mAmerican Airlines
Sun 12/217:18 pmONT - HPN
2 stops12h 16mAmerican Airlines
Deal found 11/18$340
This Delta deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:45 pmHPN - ONT
1 stop9h 57mDelta
Wed 12/310:25 pmONT - HPN
1 stop8h 24mDelta
Deal found 11/17$388
This Delta deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:45 pmHPN - ONT
1 stop9h 57mDelta
Thu 12/410:25 pmONT - HPN
1 stop8h 24mDelta
Deal found 11/17$401
This Delta deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:55 pmHPN - ONT
2 stops13h 09mDelta
Sun 12/710:25 pmONT - HPN
1 stop8h 24mDelta
Deal found 11/18$408
This American Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/23:09 pmHPN - ONT
2 stops10h 30mAmerican Airlines
Sat 12/610:34 pmONT - HPN
1 stop7h 55mAmerican Airlines
Deal found 11/17$417

Cheap flight deals from Westchester County to Ontario

Keep the following information in mind while searching for Westchester County to Ontario flight deals. Data was last updated November 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$317
(Delta)

One-way from

$159
(Delta)

Popular in

December

Cheapest in

September

Average price

$385
Provider with most accurate pricing for New York (NYC)-Los Angeles flight deals.
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From Westchester County to Ontario
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One-way flight from Westchester County to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Westchester County to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 18, 2025.
Use the filters below to find and compare flights from Westchester County to Ontario that are best for you.

Fly from

Westchester County

Fly to

Ontario

Route

Depart

Return

Price

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Thu 1/8

6:00 am-11:31 am

1 stop8h 31m

Ontario

Sat 1/17

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Fri 1/9

6:00 am-11:31 am

1 stop8h 31m

Ontario

Tue 1/13

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Thu 1/8

6:00 am-11:31 am

1 stop8h 31m

Ontario

Sun 1/11

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Sat 1/10

6:00 am-11:31 am

1 stop8h 31m

Ontario

Wed 1/14

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Tue 1/6

6:00 am-11:31 am

1 stop8h 31m

Ontario

Sat 1/17

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Fri 1/9

12:59 pm-9:05 pm

1 stop11h 06m

Ontario

Wed 1/14

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Wed 1/7

6:00 am-11:31 am

1 stop8h 31m

Ontario

Sun 1/11

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Wed 1/7

6:00 am-11:31 am

1 stop8h 31m

Ontario

Thu 1/15

10:30 pm-9:49 am

1 stop8h 19m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Tue 1/27

6:00 am-11:31 am

1 stop8h 31m

Ontario

Tue 2/24

10:20 pm-9:45 am

1 stop8h 25m

$317

White PlainsOntario

HPN - ONT

HPNONT

White Plains Westchester County

Tue 1/6

6:00 am-11:31 am

1 stop8h 31m

Ontario

Thu 1/15

10:30 pm-9:49 am

1 stop8h 19m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 23 results
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Best time to book a flight from Westchester County to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Westchester County with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Westchester County to Ontario

What is the cheapest month to book a flight from Westchester County to Ontario?

Currently, May is the cheapest month in which you can book a flight from Westchester County to Ontario (average of $87). Flying from Westchester County to Ontario in November is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from REU to ONT?

Find hourly flight availability from Westchester County to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 18, 2025.

When flying from Westchester County to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight at noon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated November 18, 2025.
Read reviews from past customers who have flown Delta from Westchester County to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,003 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,003 reviews
Delta
7.9
Good
8,003 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Westchester County to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Westchester County?

    For a flight from Westchester County to Ontario, you will be flying into Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • How long is the flight from Westchester County to Ontario?

    A quick flight from Westchester County to Ontario can take about 8h 31m. Delta provides one of the quickest options available for as low as $317. The distance between Westchester County and Ontario is about 2424 mi.

  • Can I find deals for flights from Westchester County to Ontario that include hotel bookings?

    Yes. In addition to deals on Westchester County to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Westchester County to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Westchester County to Ontario.

  • Can I find deals for business class flights from Westchester County to Ontario?

    Yes. Cheapflights offers flight deals from Westchester County to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Westchester County to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Westchester County to Ontario (average of $87). Flying from Westchester County to Ontario in November is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Westchester County to Ontario

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Top airline flying from Westchester County to Ontario

Discover the top airline that operate flights from Westchester County to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$267Average$472FlexibilityNo cancel feeOn-timeN/A

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