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Cheap flights from Milwaukee to Los Angeles from $86

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Milwaukee to Los Angeles departing on 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Milwaukee to Los Angeles (MKE-ONT)

Cheap round-trip flights

Frontier Logo
8:04 pm - 11:50 pmMKE-ONT
5h 46m1 stop
Frontier Logo
6:53 am - 7:19 pmONT-MKE
10h 26m1 stop
$258Frontier
Find Deal
Fri, Oct 31 - Mon, Nov 3
Frontier Logo
7:36 pm - 7:54 pmMKE-ONT
26h 18m1 stop
Frontier Logo
8:59 pm - 7:19 pmONT-MKE
20h 20m1 stop
$265Frontier
Find Deal
Fri, Sep 5 - Sun, Sep 7
American Airlines Logo
6:44 am - 3:24 pmMKE-ONT
10h 40m1 stop
American Airlines Logo
4:49 pm - 12:20 amONT-MKE
5h 31m1 stop
$318American Airlines
Find Deal
Sat, Oct 25 - Mon, Oct 27
Southwest Logo
7:00 pm - 10:45 pmMKE-ONT
5h 45m1 stop
Southwest Logo
10:55 am - 9:50 pmONT-MKE
8h 55m1 stop
$328Southwest
Find Deal
Fri, Sep 12 - Wed, Sep 17
United Airlines Logo
2:35 pm - 8:24 pmMKE-ONT
7h 49m1 stop
United Airlines Logo
7:02 am - 5:06 pmONT-MKE
8h 04m1 stop
$329United Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
Delta Logo
4:47 pm - 10:23 pmMKE-ONT
7h 36m1 stop
Delta Logo
5:40 pm - 8:15 amONT-MKE
12h 35m2 stops
$333Delta
Find Deal
Fri, Sep 12 - Wed, Sep 17
United Airlines Logo
10:55 am - 5:23 pmMKE-ONT
8h 28m1 stop
United Airlines Logo
5:05 am - 5:06 pmONT-MKE
10h 01m2 stops
$334United Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
Delta Logo
3:34 pm - 11:42 pmMKE-ONT
10h 08m2 stops
Delta Logo
5:40 pm - 8:15 amONT-MKE
12h 35m2 stops
$338Delta
Find Deal
Fri, Sep 26 - Wed, Oct 1
American Airlines Logo
5:28 pm - 10:16 pmMKE-ONT
6h 48m1 stop
American Airlines Logo
7:16 pm - 10:04 amONT-MKE
12h 48m2 stops
$349American Airlines
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Thu, Sep 25 - Sun, Sep 28
Southwest Logo
11:50 am - 10:20 pmMKE-ONT
12h 30m1 stop
Southwest Logo
6:50 am - 4:35 pmONT-MKE
7h 45m2 stops
$429Southwest
Find Deal
Fri, Jan 16 - Mon, Jan 19

Delta flights from Milwaukee to Ontario

Our best Delta deals on Milwaukee to Ontario flight tickets
Delta
Sep 12
MKE4:47 pmMilwaukee-Mitchell
7h 36m
1 stop
ONT10:23 pmOntario
Sep 17
ONT5:40 pmOntario
12h 35m
2 stops
MKE8:15 amMilwaukee-Mitchell
$333
Find similar
Delta
Sep 26
MKE3:34 pmMilwaukee-Mitchell
10h 08m
2 stops
ONT11:42 pmOntario
Oct 1
ONT5:40 pmOntario
12h 35m
2 stops
MKE8:15 amMilwaukee-Mitchell
$338
Find similar
Delta
Oct 25
MKE10:51 amMilwaukee-Mitchell
13h 50m
2 stops
ONT10:41 pmOntario
Oct 27
ONT10:00 pmOntario
14h 15m
2 stops
MKE2:15 pmMilwaukee-Mitchell
$339
Find similar

Alaska Airlines flights from Milwaukee to Ontario

Our best Alaska Airlines deals on Milwaukee to Ontario flight tickets
Alaska Airlines
Sep 17
MKE6:27 amMilwaukee-Mitchell
9h 45m
1 stop
ONT2:12 pmOntario
Sep 24
ONT11:39 amOntario
10h 23m
1 stop
MKE12:02 amMilwaukee-Mitchell
$296
Find similar
Alaska Airlines
Sep 9
MKE6:27 amMilwaukee-Mitchell
9h 45m
1 stop
ONT2:12 pmOntario
Sep 15
ONT11:39 amOntario
10h 23m
1 stop
MKE12:02 amMilwaukee-Mitchell
$347
Find similar
Alaska Airlines
Sep 10
MKE6:27 amMilwaukee-Mitchell
9h 45m
1 stop
ONT2:12 pmOntario
Sep 13
ONT11:39 amOntario
10h 23m
1 stop
MKE12:02 amMilwaukee-Mitchell
$386
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Milwaukee 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, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Milwaukee to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 10/31

8:04 pm-11:50 pm

1 stop5h 46m

Ontario

Mon 11/3

6:53 am-7:19 pm

1 stop10h 26m

$258

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 9/5

7:36 pm-7:54 pm

1 stop26h 18m

Ontario

Sun 9/7

8:59 pm-7:19 pm

1 stop20h 20m

$265

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Sat 10/25

6:44 am-3:24 pm

1 stop10h 40m

Ontario

Mon 10/27

4:49 pm-12:20 am

1 stop5h 31m

$318

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 9/12

7:00 pm-10:45 pm

1 stop5h 45m

Ontario

Wed 9/17

10:55 am-9:50 pm

1 stop8h 55m

$328

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Thu 9/25

2:35 pm-8:24 pm

1 stop7h 49m

Ontario

Sat 9/27

7:02 am-5:06 pm

1 stop8h 04m

$329

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 9/12

4:47 pm-10:23 pm

1 stop7h 36m

Ontario

Wed 9/17

5:40 pm-8:15 am

2 stops12h 35m

$333

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Thu 9/25

10:55 am-5:23 pm

1 stop8h 28m

Ontario

Sat 9/27

5:05 am-5:06 pm

2 stops10h 01m

$334

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 9/26

3:34 pm-11:42 pm

2 stops10h 08m

Ontario

Wed 10/1

5:40 pm-8:15 am

2 stops12h 35m

$338

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Thu 9/25

5:28 pm-10:16 pm

1 stop6h 48m

Ontario

Sun 9/28

7:16 pm-10:04 am

2 stops12h 48m

$349

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 1/16

11:50 am-10:20 pm

1 stop12h 30m

Ontario

Mon 1/19

6:50 am-4:35 pm

2 stops7h 45m

$429

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Milwaukee to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ontario?

In general, November is the cheapest month to fly from Milwaukee to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $386. If you aren’t able to travel during the month of November, then book flights to Ontario from Milwaukee during April instead. Flights to Ontario in April, while not as cheap as those in November, still average around $393.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $366. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Milwaukee to Ontario for around $642.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Milwaukee to Ontario when you can find flight prices for as low as $307. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $434 on average. Flights to Ontario from Milwaukee at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How have Milwaukee to Ontario flight prices changed over time?

As of August 2025, prices for Milwaukee to Ontario flights are approximately 40% more expensive when compared to flights at the same time last year.

When to book flights from Milwaukee to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Milwaukee to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Milwaukee to Ontario (MKE to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Milwaukee to Ontario

Direct flights

None
There are no direct flights from Milwaukee to Ontario. There are no popular flight routes from Milwaukee to Ontario.
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  • How far is Milwaukee-Mitchell to Ontario by plane?

    There are 1710.4 mi between Milwaukee-Mitchell and Ontario. 5h 45m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Ontario Airport?

    Prices for flights from Milwaukee-Mitchell Airport to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from Milwaukee-Mitchell Airport to Ontario Airport?

  • How old do you have to be to fly from Milwaukee-Mitchell Airport to Ontario Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Milwaukee to Ontario?

Best airlines flying from Milwaukee to Ontario

Compare and see reviews for airlines that fly from Milwaukee to Ontario with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $291Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $336Free CancellationRating
7.9
7,981 reviews
Search Delta flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
United AirlinesPriceFrom $344Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Milwaukee to Ontario?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Milwaukee to Ontario for you.

Can I find flights from Milwaukee to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from Milwaukee with this policy.

How can momondo help me find flights from Milwaukee to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Milwaukee.

I’m not ready to book a flight from Milwaukee to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Milwaukee. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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