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

Frontier, at $172, was found to be the cheapest airline from Ontario to Milwaukee.Alternate airlines to your destination round-trip include Delta and United Airlines. Frontier is currently priced 59% 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 $101. Users have also found prices from $187 and $196 on Alaska Airlines and Delta, respectively.

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 day to fly round-trip from Ontario to Milwaukee?

Travelers have found that booking a Tuesday departure is the best way to save up to 44% 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 57 days before your planned departure. Booking around this time can save you about 140% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $330 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $854.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Milwaukee. Flights to Milwaukee from Ontario in February are about $418 on average during February, but can be found for as low as $177.

Most accurate provider : When it comes to deals on Ontario-Milwaukee flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Milwaukee flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Milwaukee flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Milwaukee flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Milwaukee flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$101+ Flights from Ontario to Milwaukee

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1. Tell us where you want to go

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Cheap flight deals from Ontario to Milwaukee

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$172 (Booking.com)
One-way from	$101 (Trip.com)
Popular in	February
Cheapest in	November
Average price	$421

Provider with most accurate pricing for Ontario-Milwaukee-Mitchell flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Milwaukee-Mitchell flights.

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From Ontario to Milwaukee-Mitchell

Search Deals

One-way flight from Ontario to Milwaukee-Mitchell

Search Deals

High demand for flights, 5% potential price rise

Search Deals

Best time to find cheap flights, 3% potential price drop

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Average for round-trip flights in December 2024

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Find flight deals from Ontario to Milwaukee

Cheapest flights from Ontario to Milwaukee
Explore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.

dom. 12/2912:59 amONT - MKE

1 stop7h 32mAmerican Airlines

lun. 1/67:28 amMKE - ONT

1 stop6h 34mAmerican Airlines

Deal found 12/17

$566

mié. 12/1812:11 pmONT - MKE

1 stop9h 50mDelta

mar. 12/2411:23 amMKE - ONT

1 stop10h 18mDelta

Deal found 12/17

$725

lun. 12/305:05 amONT - MKE

1 stop6h 30mUnited Airlines

jue. 1/22:35 pmMKE - ONT

1 stop8h 14mUnited Airlines

Deal found 12/17

$726

dom. 12/223:45 pmONT - MKE

2 stops7h 20mSouthwest

mar. 12/246:15 pmMKE - ONT

1 stop5h 55mSouthwest

Deal found 12/17

$802

jue. 12/268:52 pmONT - MKE

1 stop14h 34mAlaska Airlines

vie. 1/32:22 pmMKE - ONT

1 stop11h 37mAlaska Airlines

Deal found 12/16

$872

Best flights from Ontario to Milwaukee
Discover carefully curated flight deals from Ontario to Milwaukee that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 18, 2024.

mié. 2/1912:59 amONT - MKE

1 stop6h 33mFrontier

dom. 2/2310:32 amMKE - ONT

1 stop15h 37mFrontier

Deal found 12/17

$172

jue. 1/301:21 pmONT - MKE

1 stop6h 10mDelta

mar. 2/46:00 amMKE - ONT

2 stops11h 25mDelta

Deal found 12/18

$377

vie. 1/245:10 amONT - MKE

1 stop7h 01mUnited Airlines

lun. 1/274:09 pmMKE - ONT

1 stop6h 42mUnited Airlines

Deal found 12/17

$404

dom. 1/266:00 amONT - MKE

1 stop29h 49mAlaska Airlines

dom. 2/22:49 pmMKE - ONT

2 stops21h 45mAlaska Airlines

Deal found 12/16

$441

lun. 4/214:55 pmONT - MKE

1 stop5h 15mSouthwest

lun. 5/265:25 amMKE - ONT

2 stops7h 35mSouthwest

Deal found 12/17

$471

dom. 12/2912:59 amONT - MKE

1 stop7h 32mAmerican Airlines

lun. 1/67:28 amMKE - ONT

1 stop6h 34mAmerican Airlines

Deal found 12/17

$566

Last-minute flights from Ontario to Milwaukee
Discover last-minute flight deals from Ontario to Milwaukee. Data last updated diciembre 18, 2024 and is based on user searches.

dom. 12/223:45 pmONT - MKE

2 stops7h 20mSouthwest

mar. 12/246:15 pmMKE - ONT

1 stop5h 55mSouthwest

Deal found 12/17

$802

lun. 12/2312:36 pmONT - MKE

1 stop8h 46mAmerican Airlines

vie. 12/275:41 pmMKE - ONT

1 stop6h 21mAmerican Airlines

Deal found 12/18

$926

mié. 12/255:05 amONT - MKE

1 stop6h 30mUnited Airlines

lun. 12/302:35 pmMKE - ONT

1 stop8h 14mUnited Airlines

Deal found 12/16

$1,136

jue. 12/268:52 pmONT - MKE

1 stop14h 34mAlaska Airlines

vie. 1/32:22 pmMKE - ONT

1 stop11h 37mAlaska Airlines

Deal found 12/16

$872

dom. 12/2912:59 amONT - MKE

1 stop7h 32mAmerican Airlines

lun. 1/67:28 amMKE - ONT

1 stop6h 34mAmerican Airlines

Deal found 12/17

$566

vie. 1/245:10 amONT - MKE

1 stop7h 01mUnited Airlines

lun. 1/274:09 pmMKE - ONT

1 stop6h 42mUnited Airlines

Deal found 12/17

$404

dom. 1/266:00 amONT - MKE

1 stop29h 49mAlaska Airlines

dom. 2/22:49 pmMKE - ONT

2 stops21h 45mAlaska Airlines

Deal found 12/16

$441

jue. 1/301:21 pmONT - MKE

1 stop6h 10mDelta

mar. 2/46:00 amMKE - ONT

2 stops11h 25mDelta

Deal found 12/18

$377

One-way flights from Ontario to Milwaukee
Search for one-way flight options from Ontario to Milwaukee. Find affordable one-way fares based on user searches. Data last updated diciembre 18, 2024.

lun. 1/276:34 pmONT - MKE

2 stops13h 20mFrontier

Deal found 12/16

$101

mar. 3/186:00 amONT - MKE

1 stop30h 02mAlaska Airlines

Deal found 12/17

$187

sáb. 2/17:05 amONT - MKE

1 stop8h 13mDelta

Deal found 12/18

$196

mié. 12/255:05 amONT - MKE

1 stop6h 30mUnited Airlines

Deal found 12/16

$221

dom. 12/2912:59 amONT - MKE

1 stop7h 32mAmerican Airlines

Deal found 12/17

$258

vie. 3/285:20 pmONT - MKE

1 stop5h 25mSouthwest

Deal found 12/17

$328

Find flights from Ontario to Milwaukee within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

mié. 2/19

12:59 am-9:32 am

1 stop6h 33m

Milwaukee-Mitchell

dom. 2/23

10:32 am-12:09 am

1 stop15h 37m

$172

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

jue. 1/30

1:21 pm-9:31 pm

1 stop6h 10m

Milwaukee-Mitchell

mar. 2/4

6:00 am-3:25 pm

2 stops11h 25m

$377

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

vie. 1/24

5:10 am-2:11 pm

1 stop7h 01m

Milwaukee-Mitchell

lun. 1/27

4:09 pm-8:51 pm

1 stop6h 42m

$404

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

dom. 1/26

6:00 am-1:49 pm

1 stop29h 49m

Milwaukee-Mitchell

dom. 2/2

2:49 pm-10:34 am

2 stops21h 45m

$441

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

lun. 4/21

4:55 pm-12:10 am

1 stop5h 15m

Milwaukee-Mitchell

lun. 5/26

5:25 am-11:00 am

2 stops7h 35m

$471

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

dom. 12/29

12:59 am-10:31 am

1 stop7h 32m

Milwaukee-Mitchell

lun. 1/6

7:28 am-12:02 pm

1 stop6h 34m

$566

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

lun. 1/27

6:34 pm-9:54 am

2 stops13h 20m

$101

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

mar. 3/18

6:00 am-2:02 pm

1 stop30h 02m

$187

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

sáb. 2/1

7:05 am-5:18 pm

1 stop8h 13m

$196

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

mié. 12/25

5:05 am-1:35 pm

1 stop6h 30m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 12 results

Compare providers for flights from Ontario to Milwaukee

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Milwaukee in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*3 stars
CheapOair	Price Accuracy2 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Milwaukee flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Milwaukee flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Milwaukee flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Milwaukee flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Milwaukee flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Ontario to Milwaukee

Get recent, data-driven insights about flights from Ontario to Milwaukee including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Milwaukee (average of $280). Flying from Ontario to Milwaukee in June is currently the most expensive (average of $360). 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 MKE?

One of the essential ways to save on airfare from Ontario to Milwaukee is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 33% on airfare.

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

Travelers seeking maximum savings on their Ontario to Milwaukee flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Milwaukee by month

In terms of precipitation, rainfall in Milwaukee 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 Milwaukee when rainfall is around 1.4 in.

Temperature in Milwaukee by month

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

See what other customers who have flown with United Airlines, Alaska Airlines and American 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.

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest

8.1

Very good

4,848 reviews

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines

8.0

Very good

9,554 reviews

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta

8.0

Very good

8,604 reviews

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines

7.4

Good

9,055 reviews

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines

7.2

Good

10,000 reviews

Southwest

8.1

Very good

4,848 reviews

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

What are the cheapest airlines flying from Ontario to Milwaukee round-trip?
Frontier, at $172, was found to be the cheapest airline from Ontario to Milwaukee.Alternate airlines to your destination round-trip include Delta and United Airlines. Frontier is currently priced 59% 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 $101. Users have also found prices from $187 and $196 on Alaska Airlines and Delta, respectively.
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.
What is the cheapest month to book a flight from Ontario to Milwaukee?
Currently, February is the cheapest month in which you can book a flight from Ontario to Milwaukee (average of $280). Flying from Ontario to Milwaukee in June is currently the most expensive (average of $360). 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

Top 5 airlines flying from Ontario to Milwaukee

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$128	Average$217	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$319	Average$371	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$326	Average$502	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$326	Average$394	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$406	Average$514	FlexibilityNo cancel fee	On-time69%

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$101+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Milwaukee with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Milwaukee

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Milwaukee

Cheapest flights from Ontario to MilwaukeeExplore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.

Explore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.

Find flights from Ontario to Milwaukee within your budget

Compare providers for flights from Ontario to Milwaukee

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Milwaukee in December.

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.

Travel insights for flights from Ontario to Milwaukee

Get recent, data-driven insights about flights from Ontario to Milwaukee including ideal travel times, pricing trends, and more.

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

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

Find hourly flight availability from Ontario to Milwaukee. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 18, 2024.

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 December 16, 2024.

Rainfall in Milwaukee by month

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

Temperature in Milwaukee by month

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

Reviews of airlines servicing Milwaukee

See what other customers who have flown with United Airlines, Alaska Airlines and American 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.

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.

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

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

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

How can I find direct flights from Ontario to Milwaukee?

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

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

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.

Top 5 airlines flying from Ontario to Milwaukee

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Cheapest flights from Ontario to Milwaukee
Explore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.