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$99+ 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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
may. 17 — may. 241
sáb. 5/17
sáb. 5/24
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 mayo 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$208
(Cheapflightsfares)

One-way from

$99
(Cheapflightsfares)

Popular in

December

Cheapest in

May

Average price

$373
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 ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in May 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 mayo 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 5/11. 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.
sáb. 6/75:21 pmONT - MSP
1 stop5h 23mFrontier
mar. 6/106:25 amMSP - ONT
1 stop6h 18mFrontier
Deal found 5/11$208
This United Airlines deal was found by Cheapflights users on 5/11. 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.
mié. 6/256:41 pmONT - ORD
1 stop8h 23mUnited Airlines
sáb. 7/127:35 pmORD - ONT
Nonstop4h 31mUnited Airlines
Deal found 5/11$237
This Gotogate deal was found by Cheapflights users on 5/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/2212:59 amONT - ORD
1 stop20h 54mFrontier
dom. 9/149:57 pmORD - ONT
1 stop15h 50mFrontier
Deal found 5/11$238
This Alaska Airlines deal was found by Cheapflights users on 5/10. 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.
mar. 8/2611:39 amONT - ORD
1 stop10h 20mAlaska Airlines
mar. 9/95:45 pmORD - ONT
1 stop8h 14mAlaska Airlines
Deal found 5/10$246
This Southwest deal was found by Cheapflights users on 5/10. 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.
sáb. 8/231:25 pmONT - ORD
1 stop7h 40mSouthwest
sáb. 9/67:00 amORD - ONT
1 stop6h 00mSouthwest
Deal found 5/10$247
This Delta deal was found by Cheapflights users on 5/10. 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.
mié. 7/161:15 pmONT - ORD
1 stop6h 53mDelta
sáb. 7/197:40 amORD - ONT
1 stop6h 34mDelta
Deal found 5/10$255
This Booking.com deal was found by Cheapflights users on 5/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/225:21 pmONT - GRB
1 stop23h 32mFrontier
vie. 5/307:48 pmGRB - ONT
1 stop6h 03mFrontier
Deal found 5/12$271
This CheapOair deal was found by Cheapflights users on 5/11. 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.
dom. 6/812:59 amONT - MKE
1 stop16h 12mFrontier
lun. 6/167:56 pmMKE - ONT
1 stop15h 05mFrontier
Deal found 5/11$279
This Hawaiian Airlines deal was found by Cheapflights users on 5/11. 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.
lun. 6/306:58 pmONT - ORD
1 stop8h 42mHawaiian Airlines
jue. 7/106:00 amORD - ONT
1 stop9h 26mHawaiian Airlines
Deal found 5/11$286
This Delta deal was found by Cheapflights users on 5/12. 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.
mar. 8/1210:59 pmONT - MSN
1 stop9h 13mDelta
jue. 8/217:00 pmMSN - ONT
1 stop6h 43mDelta
Deal found 5/12$289
This American Airlines deal was found by Cheapflights users on 5/11. 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.
lun. 6/3012:59 amONT - ORD
1 stop7h 56mAmerican Airlines
sáb. 7/123:52 pmORD - ONT
1 stop8h 35mAmerican Airlines
Deal found 5/11$293
This Delta deal was found by Cheapflights users on 5/12. 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.
jue. 6/512:18 pmONT - GRB
1 stop8h 33mDelta
sáb. 6/74:13 pmGRB - ONT
2 stops8h 03mDelta
Deal found 5/12$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 mayo 12, 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

sáb. 6/7

5:21 pm-12:44 am

1 stop5h 23m

Minneapolis St Paul

mar. 6/10

6:25 am-10:43 am

1 stop6h 18m

$208

OntarioChicago

ONT - ORD

ONTORD

Ontario

mié. 6/25

6:41 pm-5:04 am

1 stop8h 23m

Chicago O'Hare Intl

sáb. 7/12

7:35 pm-10:06 pm

Nonstop4h 31m

$237

OntarioChicago

ONT - ORD

ONTORD

Ontario

vie. 8/22

12:59 am-11:53 pm

1 stop20h 54m

Chicago O'Hare Intl

dom. 9/14

9:57 pm-11:47 am

1 stop15h 50m

$238

OntarioChicago

ONT - ORD

ONTORD

Ontario

mar. 8/26

11:39 am-11:59 pm

1 stop10h 20m

Chicago O'Hare Intl

mar. 9/9

5:45 pm-11:59 pm

1 stop8h 14m

$246

OntarioChicago

ONT - ORD

ONTORD

Ontario

sáb. 8/23

1:25 pm-11:05 pm

1 stop7h 40m

Chicago O'Hare Intl

sáb. 9/6

7:00 am-11:00 am

1 stop6h 00m

$247

OntarioChicago

ONT - ORD

ONTORD

Ontario

mié. 7/16

1:15 pm-10:08 pm

1 stop6h 53m

Chicago O'Hare Intl

sáb. 7/19

7:40 am-12:14 pm

1 stop6h 34m

$255

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

jue. 5/22

5:21 pm-6:53 pm

1 stop23h 32m

Green Bay Austin-Straubel

vie. 5/30

7:48 pm-11:51 pm

1 stop6h 03m

$271

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

dom. 6/8

12:59 am-7:11 pm

1 stop16h 12m

Milwaukee-Mitchell

lun. 6/16

7:56 pm-9:01 am

1 stop15h 05m

$279

OntarioChicago

ONT - ORD

ONTORD

Ontario

lun. 6/30

6:58 pm-5:40 am

1 stop8h 42m

Chicago O'Hare Intl

jue. 7/10

6:00 am-1:26 pm

1 stop9h 26m

$286

OntarioMadison

ONT - MSN

ONTMSN

Ontario

mar. 8/12

10:59 pm-10:12 am

1 stop9h 13m

Madison Truax Field

jue. 8/21

7:00 pm-11:43 pm

1 stop6h 43m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 59 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 mayo 12, 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 mayo 12, 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
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,290 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,431 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    $99 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 Alaska 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 mayo 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$246FlexibilityNo cancel feeOn-time62%
DeltaCheapest$279Average$465FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$288Average$522FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$515FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$416FlexibilityNo cancel feeOn-time63%

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