HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$100+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Wisconsin to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 18, 2025.

Round-trip from

$200
(Frontier)

One-way from

$100
(Frontier)

Popular in

March

Cheapest in

August

Average price

$388
From Wisconsin to Ontario
Search Deals
One-way flight from Wisconsin to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 June 18, 2025.

This Frontier deal was found by Cheapflights users on 6/17. 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 7/1410:50 amMSP - ONT
1 stop10h 24mFrontier
Wed 7/165:21 pmONT - MSP
1 stop5h 04mFrontier
Deal found 6/17$200
This Gotogate deal was found by Cheapflights users on 6/16. 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.
Tue 7/17:00 amORD - ONT
1 stop18h 50mFrontier
Mon 7/76:00 amONT - ORD
1 stop13h 06mFrontier
Deal found 6/16$205
This CheapOair deal was found by Cheapflights users on 6/18. 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 7/117:58 pmMKE - ONT
1 stop15h 11mFrontier
Sun 7/135:21 pmONT - MKE
1 stop23h 52mFrontier
Deal found 6/18$210
This Trip.com deal was found by Cheapflights users on 6/18. 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.
Wed 7/93:18 pmORD - ONT
1 stop8h 34mMultiple Airlines
Mon 7/217:22 pmONT - ORD
1 stop8h 41mMultiple Airlines
Deal found 6/18$227
This American Airlines deal was found by Cheapflights users on 6/18. 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 8/142:37 pmMSP - ONT
1 stop9h 02mAmerican Airlines
Mon 8/1812:22 pmONT - MSP
1 stop9h 37mAmerican Airlines
Deal found 6/18$237
This CheapOair deal was found by Cheapflights users on 6/16. 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 6/207:53 pmGRB - ONT
1 stop15h 08mFrontier
Sun 6/2212:59 amONT - GRB
1 stop15h 55mFrontier
Deal found 6/16$259
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 11/118:00 amORD - ONT
1 stop14h 48mAlaska Airlines
Wed 11/1211:39 amONT - ORD
1 stop10h 20mAlaska Airlines
Deal found 6/16$275
This American Airlines deal was found by Cheapflights users on 6/17. 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 7/155:30 pmMSN - ONT
1 stop7h 04mAmerican Airlines
Tue 7/2211:59 pmONT - MSN
1 stop8h 47mAmerican Airlines
Deal found 6/17$289
This Delta deal was found by Cheapflights users on 6/17. 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.
Wed 9/245:45 amMSN - ONT
1 stop7h 39mDelta
Mon 9/2910:59 pmONT - MSN
1 stop9h 16mDelta
Deal found 6/17$299
This American Airlines deal was found by Cheapflights users on 6/18. 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 8/216:02 amGRB - ONT
2 stops12h 22mAmerican Airlines
Sun 8/2411:59 pmONT - GRB
2 stops12h 30mAmerican Airlines
Deal found 6/18$299
This FlightHub deal was found by Cheapflights users on 6/18. 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.
Thu 6/197:10 pmMSN - ONT
1 stop6h 40mFrontier
Sat 6/2112:59 amONT - MSN
1 stop15h 26mFrontier
Deal found 6/18$308
This Delta deal was found by Cheapflights users on 6/16. 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 9/3012:45 pmMSP - ONT
1 stop5h 29mDelta
Tue 9/3010:59 pmONT - MSP
1 stop8h 12mDelta
Deal found 6/16$319

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 June 18, 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

Fri 7/11

11:20 am-7:14 pm

1 stop9h 54m

Ontario

Sat 7/12

5:21 pm-12:37 am

1 stop5h 16m

$200

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 7/1

7:00 am-11:50 pm

1 stop18h 50m

Ontario

Mon 7/7

6:00 am-9:06 pm

1 stop13h 06m

$205

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 7/11

7:58 pm-9:09 am

1 stop15h 11m

Ontario

Sun 7/13

5:21 pm-7:13 pm

1 stop23h 52m

$210

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Wed 7/9

3:18 pm-9:52 pm

1 stop8h 34m

Ontario

Mon 7/21

7:22 pm-6:03 am

1 stop8h 41m

$227

MinneapolisOntario

MSP - ONT

MSPONT

Minneapolis St Paul

Thu 8/14

2:37 pm-9:39 pm

1 stop9h 02m

Ontario

Mon 8/18

12:22 pm-11:59 pm

1 stop9h 37m

$237

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 11/11

8:00 am-8:48 pm

1 stop14h 48m

Ontario

Wed 11/12

11:39 am-11:59 pm

1 stop10h 20m

$275

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Tue 7/15

5:30 pm-10:34 pm

1 stop7h 04m

Ontario

Tue 7/22

11:59 pm-10:46 am

1 stop8h 47m

$289

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Wed 9/24

5:45 am-11:24 am

1 stop7h 39m

Ontario

Mon 9/29

10:59 pm-10:15 am

1 stop9h 16m

$299

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Thu 8/21

6:02 am-4:24 pm

2 stops12h 22m

Ontario

Sun 8/24

11:59 pm-2:29 pm

2 stops12h 30m

$299

MinneapolisOntario

MSP - ONT

MSPONT

Minneapolis St Paul

Tue 9/30

12:45 pm-4:14 pm

1 stop5h 29m

Ontario

Tue 9/30

10:59 pm-9:11 am

1 stop8h 12m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 60 results
1
2
3
...
6

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 $328). 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 June 18, 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 June 18, 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
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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
4,280 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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
2,507 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

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 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 $100. Users have also found prices from $124 and $137 on American Airlines and Alaska 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 $328). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Wisconsin to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Los Angeles flights
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
Los Angeles to San Francisco flights
Newark to San Francisco flights
San Jose to Los Angeles flights
San Francisco to Los Angeles flights
O'Hare Intl to Los Angeles flights
Seattle to Las Vegas flights
Hobby to Las Vegas flights
Newark to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Los Angeles to San Jose flights
LaGuardia to Los Angeles flights
Los Angeles to Las Vegas flights
Atlanta to Las Vegas flights
Seattle to Santa Ana flights
Reagan-National to Los Angeles flights
O'Hare Intl to Las Vegas flights
Dulles Intl to Los Angeles flights
San Francisco to Las Vegas flights
Santa Ana to Las Vegas flights
LaGuardia to Las Vegas flights
Denver to Las Vegas flights
Boston to Los Angeles flights
Baltimore to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Boston to Las Vegas flights
Los Angeles to Oakland flights
Burbank to Las Vegas flights
LaGuardia to San Francisco flights
Seattle to San Francisco flights
John F Kennedy Intl to Ontario flights
Portland to Los Angeles flights
Seattle to San Diego flights
Dulles Intl to Las Vegas flights
Hobby to Los Angeles flights
Oakland to Las Vegas flights
Reagan-National to Las Vegas flights
Oakland to Santa Ana flights
Dulles Intl to San Francisco flights
Miami to Los Angeles flights
Oakland to Los Angeles flights
O'Hare Intl to San Francisco flights
Newark to San Diego flights
John F Kennedy Intl to San Diego flights
Reagan-National to San Francisco flights

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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$127Average$206FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$258Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$270Average$487FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$406FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$336Average$426FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.