HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$65+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
May 3 — May 101
Sun 5/3
Sun 5/10
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

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 April 3, 2026.

This Frontier deal was found by Cheapflights users on 3/31. 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.
Sat 4/253:23 pm
ORD
-
ONT
1 stop9h 14m
Frontier
Wed 4/297:44 pm
ONT
-
ORD
1 stop8h 24m
Frontier
Deal found 3/31$160
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/79:39 pm
MSP
-
ONT
1 stop14h 26m
Frontier
Sun 5/106:00 am
ONT
-
MSP
1 stop25h 19m
Frontier
Deal found 3/31$160
This Frontier deal was found by Cheapflights users on 3/31. 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.
Thu 5/77:59 pm
MSN
-
ONT
1 stop5h 50m
Frontier
Sun 5/106:00 am
ONT
-
MSN
1 stop11h 14m
Frontier
Deal found 3/31$160
This Frontier deal was found by Cheapflights users on 4/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:23 pm
ORD
-
ONT
1 stop9h 14m
Frontier
Sat 5/27:44 pm
ONT
-
ORD
1 stop8h 24m
Frontier
Deal found 4/1$161
This Frontier deal was found by Cheapflights users on 3/30. 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.
Mon 4/2011:47 am
MSP
-
ONT
1 stop13h 56m
Frontier
Tue 4/2812:59 am
ONT
-
MSP
1 stop20h 59m
Frontier
Deal found 3/30$161
This Booking.com deal was found by Cheapflights users on 4/3. 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.
Fri 5/18:58 pm
ORD
-
ONT
1 stop23h 51m
Frontier
Sat 5/212:59 am
ONT
-
ORD
1 stop6h 46m
Frontier
Deal found 4/3$167
This Booking.com deal was found by Cheapflights users on 3/31. 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.
Tue 4/288:15 am
MSP
-
ONT
1 stop17h 40m
Frontier
Thu 4/3012:59 am
ONT
-
MSP
1 stop8h 03m
Frontier
Deal found 3/31$167
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:58 pm
ORD
-
ONT
1 stop15h 46m
Frontier
Wed 4/2211:44 am
ONT
-
ORD
1 stop16h 24m
Frontier
Deal found 3/30$171
This CheapOair deal was found by Cheapflights users on 3/29. 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.
Wed 4/2911:15 am
MSP
-
ONT
1 stop22h 16m
Frontier
Wed 5/66:00 am
ONT
-
MSP
1 stop25h 19m
Frontier
Deal found 3/29$171
This Booking.com deal was found by Cheapflights users on 3/31. 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.
Thu 4/235:20 am
ORD
-
ONT
1 stop13h 18m
Frontier
Fri 5/18:26 am
ONT
-
ORD
1 stop27h 56m
Frontier
Deal found 3/31$172
This Booking.com deal was found by Cheapflights users on 4/2. 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.
Wed 5/69:39 pm
MSP
-
ONT
1 stop14h 26m
Frontier
Fri 5/86:00 am
ONT
-
MSP
1 stop25h 19m
Frontier
Deal found 4/2$172
This Trip.com deal was found by Cheapflights users on 4/2. 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.
Mon 4/278:58 pm
ORD
-
ONT
1 stop23h 51m
Frontier
Sat 5/27:44 pm
ONT
-
ORD
1 stop8h 24m
Frontier
Deal found 4/2$177

Find flight deals from Wisconsin to Ontario

Keep the following information in mind while searching for Wisconsin to Ontario flight deals. Data was last updated April 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(Frontier)

One-way from

$65
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$395
Provider with most accurate pricing for Milwaukee-Mitchell-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Los Angeles Los Angeles flights.
Search Deals
From Wisconsin to Ontario
Search Deals
One-way flight from Wisconsin to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($43 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 April 2026
Search Deals

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 April 3, 2026.
Use the filters below to find and compare flights from Wisconsin to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Thu 4/30

8:09 pm-10:35 pm

Nonstop4h 26m

Ontario

Mon 5/4

6:59 pm-5:40 am

1 stop8h 41m

$251

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 5/23

7:45 am-12:19 pm

1 stop6h 34m

Ontario

Wed 5/27

6:45 am-9:50 pm

2 stops13h 05m

$266

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Thu 9/24

7:05 am-11:48 am

1 stop6h 43m

Ontario

Tue 9/29

8:02 pm-9:02 am

2 stops11h 00m

$317

Green BayOntario

GRB - ONT

GRBONT

Green Bay Austin-Straubel

Sat 8/22

5:30 am-11:04 am

1 stop7h 34m

Ontario

Wed 8/26

12:00 pm-9:58 pm

1 stop7h 58m

$335
Quickest round-trip

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 4/25

8:05 pm-10:31 pm

Nonstop4h 26m

Ontario

Sat 5/2

7:00 am-12:59 pm

Nonstop3h 59m

$341

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 4/25

8:05 pm-10:31 pm

Nonstop4h 26m

Ontario

Wed 6/3

1:18 pm-9:39 pm

1 stop6h 21m

$351

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 5/23

8:13 pm-10:46 pm

Nonstop4h 33m

Ontario

Tue 5/26

1:50 pm-12:59 am

1 stop9h 09m

$351

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 5/23

8:13 pm-10:46 pm

Nonstop4h 33m

Ontario

Wed 5/27

1:18 pm-9:39 pm

1 stop6h 21m

$351

MinneapolisOntario

MSP - ONT

MSPONT

Minneapolis St Paul

Sat 4/25

6:30 am-12:20 pm

2 stops7h 50m

Ontario

Wed 5/6

11:05 am-9:25 pm

2 stops8h 20m

$367

AppletonOntario

ATW - ONT

ATWONT

Appleton Intl

Sat 5/16

12:33 pm-9:58 pm

2 stops11h 25m

Ontario

Tue 5/19

7:00 am-3:10 pm

1 stop6h 10m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 60 resultsSorted by cheapest first
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, July is the cheapest month in which you can book a flight from Wisconsin to Ontario (average of $60). Flying from Wisconsin to Ontario in February is currently the most expensive (average of $251). 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.

How much does it cost to fly round-trip from Wisconsin to Ontario?

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.

  • How long is the flight from Wisconsin to Ontario?

    For as low as $251, Frontier can have you in Ontario from Wisconsin in 4h 26m. The distance between Wisconsin and Ontario is about 1695 mi. This flight may include one or multiple stops.

  • 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 $129. Users have also found prices from $138 and $143 on United Airlines and American 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, July is the cheapest month in which you can book a flight from Wisconsin to Ontario (average of $60). Flying from Wisconsin to Ontario in February is currently the most expensive (average of $251). 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.
Newark to San Francisco flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
LaGuardia to San Francisco flights
Newark to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Seattle to Las Vegas flights
San Francisco to Las Vegas flights
Seattle to Los Angeles flights
O'Hare Intl to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Newark to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
Dulles Intl to Las Vegas flights
Seattle to San Francisco flights
LaGuardia to Las Vegas flights
LaGuardia to Los Angeles flights
Boston to Las Vegas flights
Denver to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
Ontario to San Francisco flights
San Francisco to Santa Ana flights
San Francisco to Ontario flights
Minneapolis to Las Vegas flights
Boston to Los Angeles flights
San Jose to Los Angeles flights
Atlanta to Las Vegas flights
Santa Ana to San Francisco flights
Seattle to San Diego flights
O'Hare Intl to Los Angeles flights
Detroit to Las Vegas flights
Dulles Intl to Los Angeles flights
Seattle to Ontario flights
Baltimore to Las Vegas flights
Reagan-National to Las Vegas flights
Los Angeles to Las Vegas flights
Reagan-National to Los Angeles flights
Hobby to Los Angeles flights
Baltimore to Los Angeles flights
O'Hare Intl to San Francisco flights
Portland to Las Vegas flights
Boston to San Francisco flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
Santa Ana to Las Vegas flights
Dulles Intl to San Francisco flights
Atlanta to Los Angeles flights
Philadelphia to Las Vegas flights

Top 4 airlines flying from Wisconsin to Ontario

Discover the top 4 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 April 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$420FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$435FlexibilityNo cancel feeOn-time71%
DeltaCheapest$300Average$407FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$316Average$438FlexibilityNo 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.
Site
©2026 Cheapflights