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$61+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
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 julio 1, 2025.

Round-trip from

$175
(Frontier)

One-way from

$61
(Priceline)

Popular in

December

Cheapest in

July

Average price

$359
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. 9% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 1, 2025.

This Frontier deal was found by Cheapflights users on 6/30. 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.
sáb. 8/165:21 pmONT - MSP
1 stop5h 16mFrontier
sáb. 8/232:58 pmMSP - ONT
1 stop10h 52mFrontier
Deal found 6/30$175
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/116:56 pmONT - MKE
1 stop21h 45mFrontier
dom. 9/142:59 pmMKE - ONT
1 stop20h 58mFrontier
Deal found 6/30$241
This American Airlines deal was found by Cheapflights users on 7/1. 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.
mar. 8/512:55 pmONT - MSP
1 stop9h 02mAmerican Airlines
lun. 8/117:41 amMSP - ONT
1 stop12h 11mAmerican Airlines
Deal found 7/1$243
This CheapOair deal was found by Cheapflights users on 6/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/1512:59 amONT - ORD
1 stop21h 11mFrontier
jue. 7/245:20 amORD - ONT
2 stops44h 30mFrontier
Deal found 6/29$261
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/145:21 pmONT - MSN
1 stop23h 12mFrontier
jue. 7/177:18 pmMSN - ONT
1 stop15h 51mFrontier
Deal found 6/30$271
This American Airlines deal was found by Cheapflights users on 7/1. 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.
mar. 8/56:15 amONT - ORD
1 stop7h 30mAmerican Airlines
mar. 8/55:08 pmORD - ONT
1 stop7h 26mAmerican Airlines
Deal found 7/1$275
This American Airlines deal was found by Cheapflights users on 6/29. 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.
mié. 9/36:10 amONT - MSN
1 stop8h 43mAmerican Airlines
mar. 9/95:38 pmMSN - ONT
1 stop6h 55mAmerican Airlines
Deal found 6/29$289
This American Airlines deal was found by Cheapflights users on 6/30. 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.
mar. 7/2912:46 pmONT - ATW
1 stop6h 53mAmerican Airlines
mar. 8/53:51 pmATW - ONT
1 stop7h 47mAmerican Airlines
Deal found 6/30$289
This Trip.com deal was found by Cheapflights users on 7/1. 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.
dom. 7/2712:59 amONT - MKE
1 stop16h 14mMultiple Airlines
mié. 7/302:51 pmMKE - ONT
1 stop9h 01mMultiple Airlines
Deal found 7/1$292
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/167:02 amONT - ORD
Nonstop4h 03mUnited Airlines
jue. 10/237:59 pmORD - ONT
Nonstop4h 31mUnited Airlines
Deal found 6/29$297
This Delta deal was found by Cheapflights users on 6/29. 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.
mié. 9/36:05 pmONT - MSN
2 stops14h 02mDelta
mar. 9/92:44 pmMSN - ONT
2 stops9h 56mDelta
Deal found 6/29$299
This American Airlines deal was found by Cheapflights users on 7/1. 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.
sáb. 8/236:10 amONT - GRB
2 stops10h 01mAmerican Airlines
mar. 8/263:05 pmGRB - ONT
2 stops9h 43mAmerican Airlines
Deal found 7/1$299

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 julio 1, 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. 8/16

5:21 pm-12:37 am

1 stop5h 16m

Minneapolis St Paul

sáb. 8/23

2:58 pm-11:50 pm

1 stop10h 52m

$175

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

jue. 9/11

6:56 pm-6:41 pm

1 stop21h 45m

Milwaukee-Mitchell

dom. 9/14

2:59 pm-9:57 am

1 stop20h 58m

$241

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

mar. 8/5

12:55 pm-11:57 pm

1 stop9h 02m

Minneapolis St Paul

lun. 8/11

7:41 am-5:52 pm

1 stop12h 11m

$243

OntarioChicago

ONT - ORD

ONTORD

Ontario

mar. 7/15

12:59 am-12:10 am

1 stop21h 11m

Chicago O'Hare Intl

jue. 7/24

5:20 am-11:50 pm

2 stops44h 30m

$261

OntarioMadison

ONT - MSN

ONTMSN

Ontario

lun. 7/14

5:21 pm-6:33 pm

1 stop23h 12m

Madison Truax Field

jue. 7/17

7:18 pm-9:09 am

1 stop15h 51m

$271

OntarioChicago

ONT - ORD

ONTORD

Ontario

mar. 8/5

6:15 am-3:45 pm

1 stop7h 30m

Chicago O'Hare Intl

mar. 8/5

5:08 pm-10:34 pm

1 stop7h 26m

$275

OntarioMadison

ONT - MSN

ONTMSN

Ontario

mié. 9/3

6:10 am-4:53 pm

1 stop8h 43m

Madison Truax Field

mar. 9/9

5:38 pm-10:33 pm

1 stop6h 55m

$289

OntarioAppleton

ONT - ATW

ONTATW

Ontario

mar. 7/29

12:46 pm-9:39 pm

1 stop6h 53m

Appleton Intl

mar. 8/5

3:51 pm-9:38 pm

1 stop7h 47m

$289

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

dom. 7/27

12:59 am-7:13 pm

1 stop16h 14m

Milwaukee-Mitchell

mié. 7/30

2:51 pm-9:52 pm

1 stop9h 01m

$292

OntarioMadison

ONT - MSN

ONTMSN

Ontario

mié. 9/3

6:05 pm-10:07 am

2 stops14h 02m

Madison Truax Field

mar. 9/9

2:44 pm-10:40 pm

2 stops9h 56m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 58 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 julio 1, 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.

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 julio 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

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

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

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
4,273 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,539 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

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
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.8

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?

    $61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Hawaiian Airlines and Alaska Airlines, with prices starting from $159 and $171, 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 julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$228FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$432FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$288Average$488FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$512FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$416FlexibilityNo cancel feeOn-time63%

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