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$80+ Cheap flights from Ontario (ONT) to Wisconsin

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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Cheap flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated April 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$176
(Cheapflightsfares)

One-way from

$80
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$369
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
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From Ontario to Wisconsin
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One-way flight from Ontario to Wisconsin
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Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/45:21 pmONT - MSP
1 stop5h 23mFrontier
Wed 6/116:00 amMSP - ONT
1 stop5h 21mFrontier
Deal found 4/23$176
This Frontier deal was found by Cheapflights users on 4/23. 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.
Sun 5/1112:59 amONT - GRB
1 stop15h 48mFrontier
Mon 5/197:47 pmGRB - ONT
1 stop6h 12mFrontier
Deal found 4/23$218
This Frontier deal was found by Cheapflights users on 4/21. 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.
Mon 5/52:28 pmONT - ORD
1 stop12h 42mFrontier
Fri 5/168:40 amORD - ONT
1 stop11h 07mFrontier
Deal found 4/21$218
This CheapOair deal was found by Cheapflights users on 4/23. 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.
Wed 5/2112:08 amONT - MKE
1 stop16h 52mFrontier
Thu 5/297:45 pmMKE - ONT
1 stop6h 06mFrontier
Deal found 4/23$221
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 5/297:00 amONT - ORD
Nonstop4h 03mUnited Airlines
Sun 6/17:55 pmORD - ONT
Nonstop4h 31mUnited Airlines
Deal found 4/23$227
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 6/37:20 pmONT - ORD
1 stop8h 20mAlaska Airlines
Tue 6/103:17 pmORD - ONT
1 stop9h 29mAlaska Airlines
Deal found 4/21$246
This American Airlines deal was found by Cheapflights users on 4/23. 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 7/264:45 pmONT - ORD
1 stop5h 52mAmerican Airlines
Sun 8/105:00 amORD - ONT
1 stop5h 38mAmerican Airlines
Deal found 4/23$247
This Southwest deal was found by Cheapflights users on 4/22. 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.
Thu 9/2512:55 pmONT - ORD
2 stops8h 45mSouthwest
Sun 9/285:25 pmORD - ONT
1 stop8h 00mSouthwest
Deal found 4/22$252
This Delta deal was found by Cheapflights users on 4/21. 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.
Mon 6/210:01 amONT - ORD
1 stop6h 19mDelta
Sun 6/87:40 amORD - ONT
1 stop6h 37mDelta
Deal found 4/21$257
This CheapOair deal was found by Cheapflights users on 4/23. 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.
Fri 4/2512:59 amONT - MSN
1 stop15h 48mFrontier
Thu 5/17:52 pmMSN - ONT
1 stop17h 34mFrontier
Deal found 4/23$271
This Kissandfly.com deal was found by Cheapflights users on 4/23. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/810:59 pmONT - ORD
1 stop7h 33mHawaiian Airlines
Tue 8/128:00 amORD - ONT
1 stop8h 46mHawaiian Airlines
Deal found 4/23$287
This Hawaiian Airlines deal was found by Cheapflights users on 4/23. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/173:00 pmONT - MSP
1 stop6h 59mHawaiian Airlines
Wed 9/246:56 amMSP - ONT
1 stop9h 10mHawaiian Airlines
Deal found 4/23$294

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Wisconsin 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 April 24, 2025.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Ontario

Fly to

Wisconsin

Route

Depart

Return

Price

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 6/4

5:21 pm-12:44 am

1 stop5h 23m

Minneapolis St Paul

Wed 6/11

6:00 am-9:21 am

1 stop5h 21m

$176

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Sun 5/11

12:59 am-6:47 pm

1 stop15h 48m

Green Bay Austin-Straubel

Mon 5/19

7:47 pm-11:59 pm

1 stop6h 12m

$218

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 5/5

2:28 pm-5:10 am

1 stop12h 42m

Chicago O'Hare Intl

Fri 5/16

8:40 am-5:47 pm

1 stop11h 07m

$218

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

Wed 5/21

12:08 am-7:00 pm

1 stop16h 52m

Milwaukee-Mitchell

Thu 5/29

7:45 pm-11:51 pm

1 stop6h 06m

$221

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 5/29

7:00 am-1:03 pm

Nonstop4h 03m

Chicago O'Hare Intl

Sun 6/1

7:55 pm-10:26 pm

Nonstop4h 31m

$227

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 6/3

6:00 am-6:55 pm

1 stop10h 55m

Chicago O'Hare Intl

Wed 6/4

3:17 pm-10:46 pm

1 stop9h 29m

$246

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 7/26

4:45 pm-12:37 am

1 stop5h 52m

Chicago O'Hare Intl

Sun 8/10

5:00 am-8:38 am

1 stop5h 38m

$247

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 9/25

12:55 pm-11:40 pm

2 stops8h 45m

Chicago O'Hare Intl

Sun 9/28

5:25 pm-11:25 pm

1 stop8h 00m

$252

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 6/2

10:01 am-6:20 pm

1 stop6h 19m

Chicago O'Hare Intl

Mon 6/9

7:20 pm-11:46 pm

1 stop6h 26m

$257

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 8/8

10:59 pm-8:32 am

1 stop7h 33m

Chicago O'Hare Intl

Tue 8/12

8:00 am-2:46 pm

1 stop8h 46m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

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

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

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $280). Flying from Ontario to Wisconsin in June is currently the most expensive (average of $376). 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 ONT to WI?

Find hourly flight availability from Ontario to Wisconsin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

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

Rainfall in Wisconsin by month

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

In terms of precipitation, rainfall in Wisconsin ranges from 1.4 - 4.0 inches per month. June is typically the wettest month, when rainfall can reach 4.0 in. January is typically the driest time to visit Wisconsin when rainfall is around 1.4 in.

Temperature in Wisconsin by month

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

If weather is an important factor for your trip to Wisconsin, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. 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 Wisconsin. Reviews last updated April 24, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Ontario to Wisconsin. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,918 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,286 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,393 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,685 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. 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 from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

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

    $80 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Hawaiian Airlines, with prices starting from $114 and $123, respectively.

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

    The most popular flight routes from Ontario to Wisconsin are Ontario - Chicago O'Hare Intl, Ontario - Minneapolis St Paul and Ontario - Milwaukee-Mitchell.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $280). Flying from Ontario to Wisconsin in June is currently the most expensive (average of $376). 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 Ontario to Wisconsin

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

Discover the top 5 airlines that operate flights from Ontario to Wisconsin. 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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$236FlexibilityNo cancel feeOn-time62%
DeltaCheapest$254Average$435FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$263Average$506FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$523FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$418FlexibilityNo cancel feeOn-time63%

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