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Wisconsin

$102+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$227
(United Airlines)

One-way from

$102
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$439
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
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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. 6% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 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 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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/27. 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.
Mon 5/267:00 amONT - ORD
Nonstop4h 03mUnited Airlines
Fri 5/307:55 pmORD - ONT
Nonstop4h 31mUnited Airlines
Deal found 3/27$227
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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.
Fri 4/184:25 pmONT - MSP
1 stop5h 06mFrontier
Sun 4/206:00 amMSP - ONT
1 stop5h 22mFrontier
Deal found 3/27$236
This Frontier deal was found by Cheapflights users on 3/27. 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.
Fri 4/2512:11 pmONT - ORD
1 stop9h 26mFrontier
Fri 5/25:21 pmORD - ONT
1 stop8h 38mFrontier
Deal found 3/27$238
This Southwest deal was found by Cheapflights users on 3/27. 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 7/196:15 amONT - ORD
1 stop6h 45mSouthwest
Mon 7/215:25 pmORD - ONT
1 stop5h 45mSouthwest
Deal found 3/27$242
This Delta deal was found by Cheapflights users on 3/27. 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.
Sat 5/35:15 pmONT - ORD
1 stop5h 38mDelta
Wed 5/77:30 amORD - ONT
1 stop6h 45mDelta
Deal found 3/27$257
This CheapOair deal was found by Cheapflights users on 3/27. 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 4/912:59 amONT - MKE
1 stop6h 28mFrontier
Sun 4/1310:32 amMKE - ONT
1 stop24h 50mFrontier
Deal found 3/27$260
This Hawaiian Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 4/266:00 amONT - ORD
1 stop9h 00mHawaiian Airlines
Sat 5/39:00 amORD - ONT
1 stop8h 32mHawaiian Airlines
Deal found 3/27$267
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 9/237:17 pmONT - ORD
1 stop8h 23mAlaska Airlines
Fri 10/35:54 pmORD - ONT
1 stop8h 05mAlaska Airlines
Deal found 3/27$287
This American Airlines deal was found by Cheapflights users on 3/27. 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 5/611:59 pmONT - MSN
1 stop8h 34mAmerican Airlines
Tue 5/135:21 pmMSN - ONT
1 stop8h 22mAmerican Airlines
Deal found 3/27$289
This American Airlines deal was found by Cheapflights users on 3/27. 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 4/2511:59 pmONT - ATW
2 stops13h 33mAmerican Airlines
Sat 5/36:30 amATW - ONT
1 stop9h 19mAmerican Airlines
Deal found 3/27$293
This American Airlines deal was found by Cheapflights users on 3/28. 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.
Thu 6/52:40 pmONT - ORD
1 stop8h 19mAmerican Airlines
Sun 6/85:00 amORD - ONT
1 stop7h 04mAmerican Airlines
Deal found 3/28$312
This Frontier deal was found by Cheapflights users on 3/27. 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.
Wed 4/212:59 amONT - MSN
1 stop10h 10mFrontier
Sun 4/61:52 pmMSN - ONT
1 stop12h 07mFrontier
Deal found 3/27$318

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 March 28, 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

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 5/26

7:00 am-1:03 pm

Nonstop4h 03m

Chicago O'Hare Intl

Fri 5/30

7:55 pm-10:26 pm

Nonstop4h 31m

$227

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Fri 4/18

4:25 pm-11:31 pm

1 stop5h 06m

Minneapolis St Paul

Mon 4/21

6:00 am-9:22 am

1 stop5h 22m

$236

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 4/25

12:11 pm-11:37 pm

1 stop9h 26m

Chicago O'Hare Intl

Fri 5/2

5:21 pm-11:59 pm

1 stop8h 38m

$238

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 5/6

7:00 am-3:00 pm

1 stop6h 00m

Chicago O'Hare Intl

Tue 5/13

6:55 pm-11:00 pm

1 stop6h 05m

$247

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 5/3

5:15 pm-12:53 am

1 stop5h 38m

Chicago O'Hare Intl

Wed 5/7

7:30 am-12:15 pm

1 stop6h 45m

$257

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

Wed 4/9

12:59 am-9:27 am

1 stop6h 28m

Milwaukee-Mitchell

Sun 4/13

10:32 am-9:22 am

1 stop24h 50m

$260

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 4/26

6:00 am-5:00 pm

1 stop9h 00m

Chicago O'Hare Intl

Sat 5/3

9:00 am-3:32 pm

1 stop8h 32m

$267

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 4/30

11:46 am-11:59 pm

1 stop10h 13m

Chicago O'Hare Intl

Sat 5/3

9:00 am-3:32 pm

1 stop8h 32m

$287

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Tue 5/6

11:59 pm-10:33 am

1 stop8h 34m

Madison Truax Field

Tue 5/13

5:21 pm-11:43 pm

1 stop8h 22m

$289

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 4/25

11:59 pm-3:32 pm

2 stops13h 33m

Appleton Intl

Sat 5/3

6:30 am-1:49 pm

1 stop9h 19m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

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 March 28, 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 March 28, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Boarding

8.2

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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?

    $102 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 Southwest, with prices starting from $114 and $119, 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$231FlexibilityNo cancel feeOn-time62%
DeltaCheapest$254Average$435FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$263Average$506FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$539FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$429FlexibilityNo cancel feeOn-time63%
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