HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

$68+ Cheap flights from Ontario to Milwaukee (ONT - MKE)

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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Jul 31 — Aug 71
From?
To?
Wed 7/31
Wed 8/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Leverage Cheapflights for Your Next Trip

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.

The best prices from Ontario to Milwaukee-Mitchell are usually found in September or October, booked 46 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Ontario to Milwaukee

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Milwaukee (MKE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 26, 2024.

Popular in

February

Cheapest in

September

Round-trip from

$144
(mytrip.com)

One-way from

$68
(mytrip.com)
High demand for flights, 25% potential price rise
Search Deals
Best time to find cheap flights, 44% potential price drop
Search Deals
From Ontario to Milwaukee-Mitchell
Search Deals
One-way flight from Ontario to Milwaukee-Mitchell
Search Deals

What is the cheapest day to fly round-trip from Ontario to Milwaukee?

Travelers have found that booking a Sunday departure is the best way to save up to 214% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Ontario to Milwaukee?

To save on the cost of your flight from Ontario to Milwaukee, book at least 43 days before your planned departure. Booking around this time can save you about 75% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $295 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $755.

What is the cheapest month to fly from Ontario to Milwaukee?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, October can be a great choice for travel to Milwaukee. Flights to Milwaukee from Ontario in October are about $399 on average during October, but can be found for as low as $125.

What is the cheapest time of day to fly from ONT to MKE?

One of the essential ways to save on airfare from Ontario to Milwaukee is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 47% on airfare.

Cheap Ontario to Milwaukee flights in July & August 2024

Find cheap flight options from Ontario to Milwaukee specifically for the months of July and August 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Prices were last updated on July 26, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Milwaukee in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop11h 36mFrontier
Deal found 7/25$144
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2812:49 amONT - MKE
1 stop18h 18mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$146
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/316:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$147
This mytrip.com deal was found by Cheapflights users on 7/24. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/316:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/24$152
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2112:49 amONT - MKE
1 stop18h 18mFrontier
Sun 8/2510:07 pmMKE - ONT
1 stop11h 10mFrontier
Deal found 7/25$162
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/226:37 pmONT - MKE
1 stop24h 04mFrontier
Sun 8/2510:07 pmMKE - ONT
1 stop11h 10mFrontier
Deal found 7/25$164
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1512:59 amONT - MKE
1 stop17h 42mFrontier
Mon 8/199:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$168
This Gotogate deal was found by Cheapflights users on 7/25. 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.
Wed 8/146:31 pmONT - MKE
1 stop24h 36mFrontier
Sun 8/1810:07 pmMKE - ONT
1 stop27h 42mFrontier
Deal found 7/25$170
This CheapOair deal was found by Cheapflights users on 7/25. 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 8/2812:49 amONT - MKE
1 stop18h 18mFrontier
Sun 9/110:07 pmMKE - ONT
1 stop11h 10mFrontier
Deal found 7/25$178

Ontario to Milwaukee 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Milwaukee in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 26, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to Milwaukee in 2024. If these deals don't appeal to you, be sure to come back soon for more options.
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop11h 36mFrontier
Deal found 7/25$144
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2812:49 amONT - MKE
1 stop18h 18mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$146
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/316:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$147
This mytrip.com deal was found by Cheapflights users on 7/24. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/56:06 pmONT - MKE
1 stop18h 03mFrontier
Thu 9/1212:15 pmMKE - ONT
1 stop13h 44mFrontier
Deal found 7/24$151
This mytrip.com deal was found by Cheapflights users on 7/24. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/316:31 pmONT - MKE
1 stop24h 36mFrontier
Mon 9/29:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/24$152
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2112:49 amONT - MKE
1 stop18h 18mFrontier
Sun 8/2510:07 pmMKE - ONT
1 stop11h 10mFrontier
Deal found 7/25$162
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/226:37 pmONT - MKE
1 stop24h 04mFrontier
Sun 8/2510:07 pmMKE - ONT
1 stop11h 10mFrontier
Deal found 7/25$164
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1512:59 amONT - MKE
1 stop17h 42mFrontier
Mon 8/199:41 pmMKE - ONT
1 stop28h 18mFrontier
Deal found 7/25$168
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/196:06 pmONT - MKE
1 stop18h 03mFrontier
Sun 9/2212:42 pmMKE - ONT
1 stop20h 40mFrontier
Deal found 7/25$169

Ontario to Milwaukee flights leaving soon

Find last-minute flight options from Ontario to Milwaukee for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 26, 2024.
Consider one of these great deals we found on last-minute flights from Ontario to Milwaukee. Users should examine the flight details to ensure there are no surprises.
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/112:59 amONT - MKE
1 stop17h 39mFrontier
Fri 8/99:38 pmMKE - ONT
1 stop28h 23mFrontier
Deal found 7/25$237
This mytrip.com deal was found by Cheapflights users on 7/24. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/3012:59 amONT - MKE
1 stop5h 47mFrontier
Mon 8/59:31 pmMKE - ONT
1 stop28h 28mFrontier
Deal found 7/24$299
This Frontier deal was found by Cheapflights users on 7/25. 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 8/212:39 amONT - MKE
1 stop7h 44mFrontier
Mon 8/59:31 pmMKE - ONT
1 stop11h 56mFrontier
Deal found 7/25$358
This Trip.com deal was found by Cheapflights users on 7/24. 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.
Thu 8/11:35 pmONT - MKE
2 stops29h 03mFrontier
Sat 8/311:13 amMKE - ONT
2 stops21h 50mFrontier
Deal found 7/24$436
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Fri 8/25:10 amONT - MKE
1 stop14h 18mUnited Airlines
Thu 8/82:40 pmMKE - ONT
1 stop8h 08mUnited Airlines
Deal found 7/25$650
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sat 8/35:10 amONT - MKE
1 stop16h 49mUnited Airlines
Mon 8/55:50 pmMKE - ONT
1 stop25h 38mUnited Airlines
Deal found 7/25$663
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Thu 8/15:10 amONT - MKE
1 stop6h 26mUnited Airlines
Thu 8/82:40 pmMKE - ONT
1 stop8h 08mUnited Airlines
Deal found 7/25$711
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Wed 7/315:10 amONT - MKE
1 stop14h 18mUnited Airlines
Mon 8/52:40 pmMKE - ONT
1 stop8h 08mUnited Airlines
Deal found 7/24$725
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sat 8/35:10 amONT - MKE
2 stops13h 32mUnited Airlines
Mon 8/57:18 amMKE - ONT
1 stop7h 15mUnited Airlines
Deal found 7/25$750

One-way flights to Milwaukee from Ontario

Search for one-way flight options from Ontario to Milwaukee. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 26, 2024.
Users in need of a one-way flight from Ontario to Milwaukee can choose from these deals. Those seeking round-trip flights from Ontario to Milwaukee should utilize the search form at the the top of the page.
This mytrip.com deal was found by Cheapflights users on 7/26. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2212:49 amONT - MKE
1 stop5h 57mFrontier
Deal found 7/26$68
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1812:59 amONT - MKE
1 stop17h 42mFrontier
Deal found 7/25$74
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/226:37 pmONT - MKE
1 stop24h 04mFrontier
Deal found 7/25$75
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:31 pmONT - MKE
1 stop24h 36mFrontier
Deal found 7/25$78
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/176:31 pmONT - MKE
1 stop24h 36mFrontier
Deal found 7/25$79
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1812:59 amONT - MKE
1 stop17h 42mFrontier
Deal found 7/25$80
This mytrip.com deal was found by Cheapflights users on 7/24. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1412:49 amONT - MKE
1 stop18h 18mFrontier
Deal found 7/24$82
This CheapOair deal was found by Cheapflights users on 7/25. 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.
Sun 9/86:30 amONT - MKE
1 stop25h 29mFrontier
Deal found 7/25$89
This mytrip.com deal was found by Cheapflights users on 7/25. 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.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2212:59 amONT - MKE
1 stop17h 42mFrontier
Deal found 7/25$91

Find flights from Ontario to Milwaukee within your budget

Customize your flight search to find flights from Ontario to Milwaukee 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 2,752,877 searches. Data last updated July 26, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$144 - $366

Route

Depart

Return

Price

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Sat 8/24

1 stop24h 36m

Milwaukee-Mitchell

Mon 9/2

1 stop11h 36m

$144

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Wed 8/28

1 stop18h 18m

Milwaukee-Mitchell

Mon 9/2

1 stop28h 18m

$146

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Sat 8/31

1 stop24h 36m

Milwaukee-Mitchell

Mon 9/2

1 stop28h 18m

$147

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Thu 9/5

1 stop18h 03m

Milwaukee-Mitchell

Thu 9/12

1 stop13h 44m

$151

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Wed 8/7

1 stop12h 50m

Milwaukee-Mitchell

Fri 8/9

1 stop28h 23m

$322

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Sat 8/31

1 stop6h 02m

Milwaukee-Mitchell

Sat 9/7

1 stop6h 39m

$326

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Sat 10/12

2 stops10h 30m

Milwaukee-Mitchell

Tue 10/15

1 stop9h 14m

$341

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Tue 11/12

1 stop29h 27m

Milwaukee-Mitchell

Tue 11/19

1 stop7h 40m

$364

OntarioMilwaukee-Mitchell

ONT - MKE

ONTMKE

Ontario

Sun 8/25

1 stop8h 27m

Milwaukee-Mitchell

Sat 8/31

1 stop6h 47m

$366

Flights are sorted by cheapest first

Deals found on 7/25

How far ahead should I book a flight from Ontario to Milwaukee?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Milwaukee. Price data was last updated on July 25, 2024.
The best time to book flights from Ontario to Milwaukee is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

What is the cheapest day to fly from Ontario to Milwaukee?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Milwaukee. Price data was last updated on July 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Milwaukee flight should consider departing on Monday mornings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Ontario to Milwaukee

Have a flexible travel schedule? Discover the best time to fly to Milwaukee 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.

Temperature and rainfall in Milwaukee by month

Plan your trip to Milwaukee by taking into account the average temperature and rainfall totals by month.

MKE

Temperature

21.2 - 73.4 °F

If weather is an important factor for your trip to Milwaukee, 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 Milwaukee

Get insights into the airlines that provide service to Milwaukee. 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 Milwaukee. Reviews last updated July 26, 2024.
See what other customers who have flown with Frontier, Delta and United Airlines from Ontario to Milwaukee have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,365 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.0
Very good
9,630 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Frontier
6.2
Okay
3,835 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Overall

8.1

Entertainment

7.2

Food

7.2

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Milwaukee. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Ontario to Milwaukee for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to Milwaukee for under $200. The cheapest flight booked recently is on Frontier for just $144, but on average you can expect to pay $182.

  • Are there last-minute flights available from Ontario to Milwaukee for under $300?

    There are currently 20+ open flights from Ontario to Milwaukee within the next 7 days for less than $300.

  • What are the cheapest airlines flying from Ontario to Milwaukee round-trip?

    Frontier, at $144, was found to be the cheapest airline from Ontario to Milwaukee. An alternate airline flying to your destination would be Delta. Frontier is currently priced 68% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ontario to Milwaukee one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $68. Users have also found prices from $163 and $207 on Delta and Alaska Airlines, respectively.

  • What does ONT to MKE mean?

    Ontario Airport is ONT and Milwaukee-Mitchell Airport is MKE. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from Ontario to Milwaukee that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Milwaukee flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Milwaukee with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Milwaukee flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to Milwaukee that include hotel bookings?

    Yes. In addition to deals on Ontario to Milwaukee flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Milwaukee?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Milwaukee.

  • Can I find deals for business class flights from Ontario to Milwaukee?

    Yes. Cheapflights offers flight deals from Ontario to Milwaukee by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to Milwaukee that allow pets onboard?

    Many airlines flying from Ontario to Milwaukee offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Milwaukee?

    Yes, you can often find last-minute deals on Ontario to Milwaukee flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Milwaukee flight deals updated?

    The Ontario to Milwaukee flight deals you see on this page were last updated on 7/25.

  • What are the most popular airlines that fly from Ontario to Milwaukee?

    American Airlines, Delta and Frontier are the most popular airlines when flying from Ontario to Milwaukee.

  • What is the cheapest month to book a flight from Ontario to Milwaukee?

    Currently, December is the cheapest month in which you can book a flight from Ontario to Milwaukee (average of $261). Flying from Ontario to Milwaukee in June is currently the most expensive (average of $363). 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 Ontario to Milwaukee
See prices for flight routes from nearby airports that may be better suited for you.

Los Angeles to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Los Angeles to Minneapolis flights
Burbank to O'Hare Intl flights
Ontario to O'Hare Intl flights
Santa Ana to O'Hare Intl flights
Oakland to O'Hare Intl flights
San Francisco to Minneapolis flights
San Diego to O'Hare Intl flights
Las Vegas to O'Hare Intl flights
Ontario to Minneapolis flights
San Jose to O'Hare Intl flights
Los Angeles to Milwaukee flights
San Diego to Minneapolis flights
Santa Ana to Minneapolis flights
Sacramento to O'Hare Intl flights
Burbank to Minneapolis flights
Sacramento to Minneapolis flights
San Jose to Minneapolis flights
San Francisco to Milwaukee flights
Las Vegas to Minneapolis flights
San Francisco to Madison flights
Reno to Minneapolis flights
Los Angeles to Madison flights
Palm Springs to O'Hare Intl flights
Oakland to Minneapolis flights
San Diego to Milwaukee flights
Burbank to Milwaukee flights
Fresno to O'Hare Intl flights
Long Beach to O'Hare Intl flights
Ontario to Madison flights
San Diego to Madison flights
Las Vegas to Milwaukee flights
Fresno to Minneapolis flights
Reno to O'Hare Intl flights
Santa Ana to Milwaukee flights
Santa Ana to Madison flights
Los Angeles to Green Bay flights
Long Beach to Minneapolis flights
Oakland to Milwaukee flights
San Jose to Milwaukee flights
San Francisco to Green Bay flights
Medford to O'Hare Intl flights
San Francisco to Appleton flights
Sacramento to Milwaukee flights
Santa Barbara to O'Hare Intl flights
Los Angeles to Appleton flights
Santa Barbara to Minneapolis flights
San Jose to Madison flights

Top 5 airlines flying from Ontario to Milwaukee

Discover the top 5 airlines that operate flights from Ontario to Milwaukee. 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 2,752,877 searches. Data last updated July 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$132Average$206FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$185Average$303FlexibilityNo cancel feeOn-time65%
DeltaCheapest$284Average$569FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$347Average$517FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$387Average$527FlexibilityNo cancel feeOn-time69%
Dallas to Atlanta flights
Dallas to Cabo San Lucas flights
Boston to Rome flights
Las Vegas to Reno flights
New York to Mexico City flights
USA to Europe flights
Newark Airport to Paris flights
New York to Dublin flights
New York to Singapore flights
Salt Lake City to Los Angeles flights
Los Angeles to Cancún flights
Ontario to Luqa flights

Search flights from Ontario to Milwaukee by cabin class

Find flights from Ontario to Milwaukee, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Abha
Flights to Komatsu
Flights to Skardu
Flights to Laayoune Hassan I
Flights to Aqaba King Hussein Intl
Flights to Nampula
Flights to Bourgas
Flights to Riverton
Flights to Alpena Phelps/Collins
Flights to Palmas
Flights to Newport State
Flights to Antofagasta Cerro Moreno
Flights to Nuku‘alofa Fua'Amotu Intl
Flights to Ndola
Flights to Fort Dodge
Flights to Miri
Flights to Rhinelander Oneida County
Flights to Seattle Lake Union Spb
Flights to Portsmouth Pease Intl
Flights to Tumbes
Flights to Jigiga
Flights to Diyarbakir
Flights to Akureyri
Flights to Brainerd Crow Wing County
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.
View all available airlines