Which airports can I use when flying from Ontario to Milwaukee?

Flights from Ontario to Milwaukee usually depart from Ontario (ONT) and arrive at Milwaukee-Mitchell (MKE).

What cabin classes can I book on flights from Ontario to Milwaukee?

Two cabin classes are available on flights from Ontario to Milwaukee: • Economy Class • First Class

Which airports do connecting flights from Ontario to Milwaukee pass through?

One-stop flights from Ontario to Milwaukee most commonly connect through: • Denver Intl (DEN) - 37% of one-stop connections • Phoenix Sky Harbor Intl (PHX) - 27% of one-stop connections • Dallas/Fort Worth (DFW) - 12% of one-stop connections • Las Vegas Harry Reid Intl (LAS) - 10% of one-stop connections Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Can I save money by using flexible dates for flights from Ontario to Milwaukee?

Yes. Being flexible with your travel dates can save you up to 55% on the Ontario to Milwaukee route. Wednesday is the cheapest departure day at $356 round-trip on average, while Sunday is the most expensive at $778, a difference of $422. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Milwaukee?

Some of the most popular sights in Milwaukee are Baird Center, Fiserv Forum and Pabst Theater. These are among the most viewed places in Milwaukee on KAYAK.

How long is a flight from Ontario to Milwaukee?

A nonstop flight from Ontario to Milwaukee takes 0h 00m, covering 1,707 miles.

Do I need a passport to fly from Ontario to Milwaukee?

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Have flight prices from Ontario to Milwaukee changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $337 to $1,933. That means the highest observed fare was about 6x higher than the lowest one.

How are flight prices from Ontario to Milwaukee looking right now?

One-way fares from Ontario to Milwaukee are currently lower than usual. Average one-way flight prices are about $194, which is 25% below the typical average for this route.

How much time can I save by choosing a different layover airport from Ontario to Milwaukee?

Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 5h 56m, compared with 6h 05m via Phoenix Sky Harbor Intl (PHX) and 6h 17m via Denver Intl (DEN).

What is the time difference between Ontario and Milwaukee?

Milwaukee is 2 hours ahead of Ontario (Central Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Milwaukee-Mitchell Airport (MKE)?

Milwaukee-Mitchell Airport (MKE) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include: · Dollar · Budget · Alamo · Hertz · Sixt

How much should I expect to pay for a Ontario to Milwaukee flight?

Round-trip flights from Ontario to Milwaukee range from $366 to $537, with an average of $442 over the past 12 months. Anything below $366 counts as a good deal.

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

American Airlines ($337) and Delta ($337) are the cheapest airlines to fly round-trip from Ontario to Milwaukee according to KAYAK data over the last 5 days.

What is the most popular layover airport when flying from Ontario to Milwaukee?

Denver Intl (DEN) is the most popular layover for the Ontario to Milwaukee route. 37% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via DEN.

What is the cheapest layover airport when flying from Ontario to Milwaukee?

Flights via Salt Lake City (SLC) offer the most affordable fares, with an average round-trip price of $376. Based on KAYAK data over the past 3 months.

When flying from Ontario to Milwaukee which airport offers the shortest layover?

Las Vegas Harry Reid Intl (LAS) had the shortest average connection time for Ontario to Milwaukee layovers at 207 minutes over the past 3 months.

$169 CHEAP FLIGHTS from Ontario to Milwaukee (ONT - MKE)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$337

Typical prices: $366-$537

American Airlines

Wed 10/24Wed 10/31

ONT - MKE • 1 stop

Cheapest one-way

$169

Typical prices: $205-$326

American Airlines

Sun 9/30

ONT - MKE • 1 stop

Nonstop flights

Not available

There are currently no direct flights between Ontario and Milwaukee. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

September

Cheapest • 17% price drop

October

Most popular

Good to know

Top layover airports

Salt Lake City (SLC)

Cheapest • Avg $376 (round-trip)

Las Vegas Harry Reid Intl (LAS)

Shortest trip • 5h 56m (one-way)

Insights

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Milwaukee!

Flight Deals

Cheap Flights from Ontario to Milwaukee (ONT-MKE)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Ontario to Milwaukee

Sat, Oct 17 - Sat, Oct 24

7:07 am - 5:25 pmONT Ontario-MKE Milwaukee-Mitchell

8h 18m1 stop Atlanta Hartsfield-Jackson

7:05 am - 12:36 pmMKE Milwaukee-Mitchell-ONT Ontario

7h 31m1 stop Salt Lake City

$337Delta

Sat, Oct 24 - Sat, Oct 31

7:00 am - 4:57 pmONT Ontario-MKE Milwaukee-Mitchell

7h 57m1 stop Dallas/Fort Worth

7:14 am - 1:30 pmMKE Milwaukee-Mitchell-ONT Ontario

8h 16m1 stop Dallas/Fort Worth

$337American Airlines

Sat, Oct 24 - Sat, Oct 31

5:00 am - 1:31 pmONT Ontario-MKE Milwaukee-Mitchell

6h 31m1 stop Denver Intl

8:30 am - 6:01 pmMKE Milwaukee-Mitchell-ONT Ontario

11h 31m2 stops Denver Intl San Francisco

$342United Airlines

Sat, Oct 17 - Sat, Oct 24

7:07 am - 5:25 pmONT Ontario-MKE Milwaukee-Mitchell

8h 18m1 stop Atlanta Hartsfield-Jackson

7:05 am - 5:12 pmMKE Milwaukee-Mitchell-ONT Ontario

12h 07m2 stops Salt Lake City Seattle/Tacoma Intl

$342Delta

Sat, Oct 24 - Sat, Oct 31

1:22 pm - 10:59 pmONT Ontario-MKE Milwaukee-Mitchell

7h 37m2 stops Denver Intl Chicago O'Hare Intl

12:03 pm - 8:15 pmMKE Milwaukee-Mitchell-ONT Ontario

10h 12m2 stops Chicago O'Hare Intl San Francisco

$347United Airlines

Fri, Oct 9 - Tue, Oct 13

11:15 pm - 9:11 amONT Ontario-MKE Milwaukee-Mitchell

7h 56m1 stop Atlanta Hartsfield-Jackson

12:36 pm - 8:25 pmMKE Milwaukee-Mitchell-ONT Ontario

9h 49m1 stop Atlanta Hartsfield-Jackson

$353Delta

Thu, Oct 1 - Thu, Oct 8

4:15 pm - 12:10 amONT Ontario-MKE Milwaukee-Mitchell

5h 55m1 stop Phoenix Sky Harbor Intl

8:00 pm - 11:50 pmMKE Milwaukee-Mitchell-ONT Ontario

5h 50m1 stop Phoenix Sky Harbor Intl

$383Southwest

Wed, Nov 25 - Thu, Nov 26

5:00 pm - 12:15 amONT Ontario-MKE Milwaukee-Mitchell

5h 15m1 stop Phoenix Sky Harbor Intl

12:55 pm - 4:50 pmMKE Milwaukee-Mitchell-ONT Ontario

5h 55m1 stop Denver Intl

$390Southwest

Fri, Oct 9 - Tue, Oct 13

7:34 pm - 8:07 amONT Ontario-MKE Milwaukee-Mitchell

10h 33m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

2:36 pm - 6:43 pmMKE Milwaukee-Mitchell-ONT Ontario

6h 07m1 stop Phoenix Sky Harbor Intl

$396American Airlines

Wed, Nov 11 - Sun, Nov 15

6:30 am - 1:55 pmONT Ontario-MKE Milwaukee-Mitchell

5h 25m1 stop Phoenix Sky Harbor Intl

7:05 am - 11:52 amMKE Milwaukee-Mitchell-ONT Ontario

6h 47m1 stop Dallas/Fort Worth

$412American Airlines

Recent last minute flight deals from Ontario to Milwaukee

Wed, Sep 9 - Tue, Sep 15

7:20 am - 4:53 pmONT Ontario-MKE Milwaukee-Mitchell

7h 33m1 stop Dallas/Fort Worth

5:43 pm - 10:37 pmMKE Milwaukee-Mitchell-ONT Ontario

6h 54m1 stop Dallas/Fort Worth

$567American Airlines

Sat, Sep 12 - Tue, Sep 15

6:15 am - 2:05 pmONT Ontario-MKE Milwaukee-Mitchell

5h 50m1 stop Phoenix Sky Harbor Intl

2:45 pm - 6:17 pmMKE Milwaukee-Mitchell-ONT Ontario

5h 32m1 stop Phoenix Sky Harbor Intl

$567American Airlines

Sat, Sep 12 - Tue, Sep 15

8:00 am - 9:03 pmONT Ontario-MKE Milwaukee-Mitchell

11h 03m2 stops San Francisco Denver Intl

8:15 am - 12:50 pmMKE Milwaukee-Mitchell-ONT Ontario

6h 35m1 stop Denver Intl

$572United Airlines

Wed, Sep 9 - Tue, Sep 15

1:04 pm - 9:11 pmONT Ontario-MKE Milwaukee-Mitchell

6h 07m1 stop Salt Lake City

12:45 pm - 11:47 pmMKE Milwaukee-Mitchell-ONT Ontario

13h 02m2 stops Atlanta Hartsfield-Jackson Salt Lake City

$572Delta

Sat, Sep 12 - Tue, Sep 15

5:00 am - 4:09 pmONT Ontario-MKE Milwaukee-Mitchell

9h 09m2 stops Denver Intl Chicago O'Hare Intl

2:20 pm - 8:53 pmMKE Milwaukee-Mitchell-ONT Ontario

8h 33m2 stops Chicago O'Hare Intl Denver Intl

$577United Airlines

Wed, Sep 9 - Tue, Sep 15

6:00 am - 8:31 pmONT Ontario-MKE Milwaukee-Mitchell

12h 31m2 stops Salt Lake City Atlanta Hartsfield-Jackson

6:30 am - 5:19 pmMKE Milwaukee-Mitchell-ONT Ontario

12h 49m2 stops Minneapolis St Paul Seattle/Tacoma Intl

$577Delta

Sat, Sep 12 - Wed, Sep 16

7:05 am - 5:31 pmONT Ontario-MKE Milwaukee-Mitchell

8h 26m1 stop Atlanta Hartsfield-Jackson

12:45 pm - 8:24 pmMKE Milwaukee-Mitchell-ONT Ontario

9h 39m1 stop Atlanta Hartsfield-Jackson

$587Delta

Fri, Sep 11 - Wed, Sep 16

8:10 am - 5:45 pmONT Ontario-MKE Milwaukee-Mitchell

7h 35m1 stop Denver Intl

6:50 am - 12:40 pmMKE Milwaukee-Mitchell-ONT Ontario

7h 50m1 stop Las Vegas Harry Reid Intl

$655Southwest

Fri, Sep 11 - Wed, Sep 16

10:25 am - 9:48 pmONT Ontario-MKE Milwaukee-Mitchell

9h 23m1 stop Dallas/Fort Worth

2:45 pm - 6:17 pmMKE Milwaukee-Mitchell-ONT Ontario

5h 32m1 stop Phoenix Sky Harbor Intl

$655American Airlines

Tue, Sep 8 - Sat, Sep 12

5:00 am - 1:34 pmONT Ontario-MKE Milwaukee-Mitchell

6h 34m1 stop Denver Intl

2:40 pm - 8:53 pmMKE Milwaukee-Mitchell-ONT Ontario

8h 13m1 stop Denver Intl

$687United Airlines

Booking Insights

Price, demand and travel trends for Ontario to Milwaukee flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Ontario to Milwaukee with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Ontario to Milwaukee?

Round-trip flights from Ontario to Milwaukee start at $337. Prices are below average for this route right now, with typical round-trip fares ranging from $366 to $537. The lowest price found in the past 5 days was $337 on American Airlines.

What's the cheapest day of the week to fly from Ontario to Milwaukee?

Wednesday is the cheapest day of the week to fly from Ontario to Milwaukee, it is 20% cheaper than the average day. Sunday is the most expensive day with flight prices 76% higher than average. Based on deals found by KAYAK users in the last 12 months.

Find deals

Low season	February
High season	October
Cheapest flight	$169

Most popular time to fly and prices are also 1% lower on average.

Flight from Ontario to Milwaukee

When to book flights from Ontario to Milwaukee

Are your dates flexible? Find out the best times to travel from Ontario to Milwaukee based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Ontario to Milwaukee?
Flights from Ontario to Milwaukee usually depart from Ontario (ONT) and arrive at Milwaukee-Mitchell (MKE).
What cabin classes can I book on flights from Ontario to Milwaukee?
Two cabin classes are available on flights from Ontario to Milwaukee:

• Economy Class
• First Class
Which airports do connecting flights from Ontario to Milwaukee pass through?
One-stop flights from Ontario to Milwaukee most commonly connect through:

• Denver Intl (DEN) - 37% of one-stop connections
• Phoenix Sky Harbor Intl (PHX) - 27% of one-stop connections
• Dallas/Fort Worth (DFW) - 12% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 10% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.
Can I save money by using flexible dates for flights from Ontario to Milwaukee?
Yes. Being flexible with your travel dates can save you up to 55% on the Ontario to Milwaukee route. Wednesday is the cheapest departure day at $356 round-trip on average, while Sunday is the most expensive at $778, a difference of $422. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Milwaukee?
Some of the most popular sights in Milwaukee are Baird Center, Fiserv Forum and Pabst Theater. These are among the most viewed places in Milwaukee on KAYAK.
How long is a flight from Ontario to Milwaukee?
A nonstop flight from Ontario to Milwaukee takes 0h 00m, covering 1,707 miles.
Do I need a passport to fly from Ontario to Milwaukee?
No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.
Have flight prices from Ontario to Milwaukee changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $337 to $1,933. That means the highest observed fare was about 6x higher than the lowest one.
How are flight prices from Ontario to Milwaukee looking right now?
One-way fares from Ontario to Milwaukee are currently lower than usual. Average one-way flight prices are about $194, which is 25% below the typical average for this route.
How much time can I save by choosing a different layover airport from Ontario to Milwaukee?
Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 5h 56m, compared with 6h 05m via Phoenix Sky Harbor Intl (PHX) and 6h 17m via Denver Intl (DEN).
What is the time difference between Ontario and Milwaukee?
Milwaukee is 2 hours ahead of Ontario (Central Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Milwaukee-Mitchell Airport (MKE)?
Milwaukee-Mitchell Airport (MKE) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include:
· Dollar
· Budget
· Alamo
· Hertz
· Sixt
How much should I expect to pay for a Ontario to Milwaukee flight?
Round-trip flights from Ontario to Milwaukee range from $366 to $537, with an average of $442 over the past 12 months. Anything below $366 counts as a good deal.

If your dates can be flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average $356 - about $422 less than Sunday (54% savings) based on the last 12 months.
If you can choose when to travel, plan your Ontario to Milwaukee trip for September. Fares historically average $366 round-trip in that month - typically $288 less than the most expensive month, which is June (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Milwaukee-Mitchell Airport.
- Best Western Plus Milwaukee Airport Hotel & Conference Center
- Super 8 by Wyndham Milwaukee Airport
- Hyatt Place Milwaukee Airport

More options for your flight from Ontario to Milwaukee

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Return flight

Complete your trip to Milwaukee with a hotel stay or car rental

Car rentals in Milwaukee

Hotels in Milwaukee

Vacations in Milwaukee

ONT - MKE

$169 Find Cheap Flights from Ontario to Milwaukee - Compare and Save

Everything you should know

Cheap Flights from Ontario to Milwaukee (ONT-MKE)

Recent round-trip flight deals from Ontario to Milwaukee

Recent one-way flight deals from Ontario to Milwaukee

Recent last minute flight deals from Ontario to Milwaukee

Price, demand and travel trends for Ontario to Milwaukee flights

How much is a round-trip flight from Ontario to Milwaukee?

What's the cheapest day of the week to fly from Ontario to Milwaukee?

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

What is the most popular layover airport when flying from Ontario to Milwaukee?

What is the cheapest layover airport when flying from Ontario to Milwaukee?

When flying from Ontario to Milwaukee which airport offers the shortest layover?

Key details for Ontario to Milwaukee flights

Low season

High season

Cheapest flight

When to book flights from Ontario to Milwaukee

Your Ontario to Milwaukee flight questions, answered

Your guide to booking Ontario to Milwaukee flights

More options for your flight from Ontario to Milwaukee

Complete your trip to Milwaukee with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Ontario to Milwaukee

Find direct flights to and from Ontario and Milwaukee

Flights from domestic origins to Milwaukee

Flights to other popular destinations

Find deals for your return flight