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Ontario

$70+ Cheap flights from Wisconsin 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
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Cheap flight deals from Wisconsin to Ontario

Keep the following information in mind while searching for Wisconsin to Ontario flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$149
(Trip.com)

One-way from

$70
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$532
Provider with most accurate pricing for Milwaukee-Mitchell-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Los Angeles flights.
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From Wisconsin to Ontario
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One-way flight from Wisconsin to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Wisconsin to Ontario

Cheapest flights from Wisconsin to Ontario
Explore the most affordable flight options available from Wisconsin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/206:00 amMSP - ONT
1 stop19h 59mFrontier
Tue 4/2212:59 amONT - MSP
1 stop21h 36mFrontier
Deal found 3/30$149
This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:24 pmORD - ONT
1 stop8h 35mFrontier
Thu 5/16:35 pmONT - ORD
1 stop8h 35mFrontier
Deal found 3/30$207
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/83:48 pmMKE - ONT
1 stop10h 11mFrontier
Sat 5/1012:59 amONT - MKE
1 stop12h 26mFrontier
Deal found 3/30$238
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/36:15 amORD - ONT
1 stop7h 45mSouthwest
Tue 5/67:00 amONT - ORD
1 stop6h 00mSouthwest
Deal found 3/30$242
This Alaska Airlines deal was found by Cheapflights users on 3/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/36:00 amORD - ONT
1 stop11h 32mAlaska Airlines
Mon 5/56:24 pmONT - ORD
1 stop9h 41mAlaska Airlines
Deal found 3/30$246
This American Airlines deal was found by Cheapflights users on 3/29. 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.
Wed 5/147:05 amORD - ONT
1 stop6h 46mAmerican Airlines
Wed 5/217:25 pmONT - ORD
1 stop7h 48mAmerican Airlines
Deal found 3/29$249
This Delta deal was found by Cheapflights users on 3/29. 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.
Fri 8/157:15 amORD - ONT
1 stop7h 08mDelta
Fri 8/1510:59 pmONT - ORD
1 stop9h 03mDelta
Deal found 3/29$257
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Sat 5/245:21 pmMSN - ONT
1 stop6h 37mAmerican Airlines
Sat 5/312:44 pmONT - MSN
1 stop6h 10mAmerican Airlines
Deal found 3/30$286
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/101:52 pmMSN - ONT
1 stop12h 07mFrontier
Sat 4/1212:59 amONT - MSN
1 stop10h 03mFrontier
Deal found 3/30$298
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/27:53 pmGRB - ONT
1 stop16h 50mFrontier
Sun 6/85:21 pmONT - GRB
1 stop23h 33mFrontier
Deal found 3/30$300
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/237:55 pmORD - ONT
Nonstop4h 31mUnited Airlines
Sun 6/17:00 amONT - ORD
Nonstop4h 03mUnited Airlines
Deal found 3/30$317
This Delta deal was found by Cheapflights users on 3/31. 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.
Tue 4/155:10 pmMSN - ONT
1 stop7h 26mDelta
Sat 4/1912:07 pmONT - MSN
1 stop8h 26mDelta
Deal found 3/31$318

Cheapflights Fare Finder

Customize your flight search to find flights from Wisconsin 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 March 31, 2025.
Use the filters below to find and compare flights from Wisconsin to Ontario that are best for you.

Fly from

Wisconsin

Fly to

Ontario

Route

Depart

Return

Price

MinneapolisOntario

MSP - ONT

MSPONT

Minneapolis St Paul

Sun 4/20

6:00 am-11:59 pm

1 stop19h 59m

Ontario

Tue 4/22

12:59 am-12:35 am

1 stop21h 36m

$149

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Mon 4/28

5:24 pm-11:59 pm

1 stop8h 35m

Ontario

Thu 5/1

6:35 pm-5:10 am

1 stop8h 35m

$207

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Thu 5/8

3:48 pm-11:59 pm

1 stop10h 11m

Ontario

Sat 5/10

12:59 am-3:25 pm

1 stop12h 26m

$238

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 5/3

6:15 am-12:00 pm

1 stop7h 45m

Ontario

Tue 5/6

7:00 am-3:00 pm

1 stop6h 00m

$242

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 5/3

6:00 am-3:32 pm

1 stop11h 32m

Ontario

Mon 5/5

6:24 pm-6:05 am

1 stop9h 41m

$246

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Wed 5/14

7:05 am-11:51 am

1 stop6h 46m

Ontario

Wed 5/21

7:25 pm-5:13 am

1 stop7h 48m

$249

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Wed 5/7

7:30 am-12:15 pm

1 stop6h 45m

Ontario

Wed 8/6

12:00 pm-9:21 pm

1 stop7h 21m

$257

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Sat 5/24

5:21 pm-9:58 pm

1 stop6h 37m

Ontario

Sat 5/31

2:44 pm-10:54 pm

1 stop6h 10m

$286

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Thu 4/10

1:52 pm-11:59 pm

1 stop12h 07m

Ontario

Sat 4/12

12:59 am-1:02 pm

1 stop10h 03m

$298

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Mon 6/2

7:53 pm-10:43 am

1 stop16h 50m

Ontario

Sun 6/8

5:21 pm-6:54 pm

1 stop23h 33m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 60 results
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Best time to book a flight from Wisconsin to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Wisconsin 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 Wisconsin to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Wisconsin to Ontario (average of $246). Flying from Wisconsin to Ontario in March is currently the most expensive (average of $326). 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 WI to ONT?

Find hourly flight availability from Wisconsin 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 March 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Wisconsin to Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 March 31, 2025.
To help decide which airline to fly from Wisconsin to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,276 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,342 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Related info for your journey

Find useful and relevant information for your journey from Wisconsin 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 Wisconsin?

    If you book a flight to Ontario from Wisconsin, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from Wisconsin to Ontario one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $70. Users have also found prices from $114 and $123 on United Airlines and Hawaiian Airlines, respectively.

  • What are the most popular routes from Wisconsin to Ontario?

    When deciding which route to take from Wisconsin to Ontario consider Chicago O'Hare Intl - Ontario, Minneapolis St Paul - Ontario or Milwaukee-Mitchell - Ontario as they are the most popular.

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

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

  • How can I find direct flights from Wisconsin to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Wisconsin 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 Wisconsin to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Wisconsin to Ontario (average of $246). Flying from Wisconsin to Ontario in March is currently the most expensive (average of $326). 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 Wisconsin to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Wisconsin to Ontario

Discover the top 5 airlines that operate flights from Wisconsin 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$127Average$219FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$238Average$405FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$433FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$298Average$520FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$425FlexibilityNo cancel feeOn-time63%
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