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Cheap flights from Milwaukee to Los Angeles from $139

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 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Milwaukee to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
5:00 pm - 9:00 pmMKE  Milwaukee-Mitchell-ONT Ontario
6h 00m1 stop Las Vegas Harry Reid Intl
Southwest Logo
1:50 pm - 9:25 pmONT  Ontario-MKE Milwaukee-Mitchell
5h 35m1 stop Denver Intl
$268Southwest
Tue, Sep 29 - Wed, Sep 30
Southwest Logo
7:10 am - 12:40 pmMKE  Milwaukee-Mitchell-ONT Ontario
7h 30m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl
Southwest Logo
1:10 pm - 9:25 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 15m1 stop Phoenix Sky Harbor Intl
$273Southwest
Tue, Sep 29 - Wed, Sep 30
Delta Logo
5:30 am - 11:05 amMKE  Milwaukee-Mitchell-ONT Ontario
7h 35m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:04 pm - 9:11 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 07m1 stop Salt Lake City
$294Delta
Tue, Sep 29 - Mon, Oct 5
Southwest Logo
5:00 am - 11:10 amMKE  Milwaukee-Mitchell-ONT Ontario
8h 10m1 stop Phoenix Sky Harbor Intl
Southwest Logo
3:20 pm - 10:40 pmONT  Ontario-MKE Milwaukee-Mitchell
5h 20m1 stop Las Vegas Harry Reid Intl
$295Southwest
Thu, Nov 26 - Tue, Dec 1
American Airlines Logo
12:22 pm - 6:53 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 31m1 stop Dallas/Fort Worth
American Airlines Logo
7:34 pm - 8:07 amONT  Ontario-MKE Milwaukee-Mitchell
10h 33m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$316American Airlines
Tue, Sep 29 - Mon, Oct 5
United Airlines Logo
2:39 pm - 8:58 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 19m1 stop Denver Intl
United Airlines Logo
6:00 am - 5:19 pmONT  Ontario-MKE Milwaukee-Mitchell
9h 19m1 stop Houston George Bush Intcntl
$319United Airlines
Thu, Sep 24 - Tue, Sep 29
American Airlines Logo
7:01 am - 6:17 pmMKE  Milwaukee-Mitchell-ONT Ontario
13h 16m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
7:34 pm - 8:07 amONT  Ontario-MKE Milwaukee-Mitchell
10h 33m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$321American Airlines
Tue, Sep 29 - Mon, Oct 5
United Airlines Logo
2:20 pm - 10:59 pmMKE  Milwaukee-Mitchell-ONT Ontario
10h 39m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
5:00 am - 1:31 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 31m1 stop Denver Intl
$325United Airlines
Thu, Sep 24 - Tue, Sep 29
Delta Logo
12:51 pm - 7:53 pmMKE  Milwaukee-Mitchell-ONT Ontario
9h 02m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:00 pm - 11:53 pmONT  Ontario-MKE Milwaukee-Mitchell
9h 53m1 stop Atlanta Hartsfield-Jackson
$335Delta
Mon, Aug 31 - Sat, Sep 5
Alaska Airlines Logo
4:31 pm - 11:06 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 35m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 3:33 pmONT  Ontario-MKE Milwaukee-Mitchell
7h 33m1 stop Seattle/Tacoma Intl
$344Alaska Airlines
Fri, Nov 6 - Tue, Nov 10

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Delta flights from Milwaukee to Ontario

Our best Delta deals on Milwaukee to Ontario flight tickets
Delta
Sep 29
MKE5:30 amMilwaukee-Mitchell
7h 35m
1 stop
ONT11:05 amOntario
Oct 5
ONT1:04 pmOntario
6h 07m
1 stop
MKE9:11 pmMilwaukee-Mitchell
$294
Delta
Aug 31
MKE12:51 pmMilwaukee-Mitchell
9h 02m
1 stop
ONT7:53 pmOntario
Sep 5
ONT12:00 pmOntario
9h 53m
1 stop
MKE11:53 pmMilwaukee-Mitchell
$335
Delta
Sep 2
MKE7:30 amMilwaukee-Mitchell
6h 46m
1 stop
ONT12:16 pmOntario
Sep 5
ONT7:05 amOntario
7h 09m
1 stop
MKE4:14 pmMilwaukee-Mitchell
$351

American Airlines flights from Milwaukee to Ontario

Our best American Airlines deals on Milwaukee to Ontario flight tickets
American Airlines
Sep 29
MKE12:22 pmMilwaukee-Mitchell
8h 31m
1 stop
ONT6:53 pmOntario
Oct 5
ONT7:34 pmOntario
10h 33m
2 stops
MKE8:07 amMilwaukee-Mitchell
$316
American Airlines
Sep 29
MKE7:01 amMilwaukee-Mitchell
13h 16m
2 stops
ONT6:17 pmOntario
Oct 5
ONT7:34 pmOntario
10h 33m
2 stops
MKE8:07 amMilwaukee-Mitchell
$321
American Airlines
Aug 31
MKE5:00 amMilwaukee-Mitchell
9h 03m
2 stops
ONT12:03 pmOntario
Sep 5
ONT6:15 amOntario
10h 15m
2 stops
MKE6:30 pmMilwaukee-Mitchell
$345

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 11, 2026.
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

Cheapest round-trip
Quickest round-trip

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Tue 9/29

5:00 pm-9:00 pm

1 stop6h 00m

Ontario

Wed 9/30

1:50 pm-9:25 pm

1 stop5h 35m

$268

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Tue 9/29

7:10 am-12:40 pm

2 stops7h 30m

Ontario

Wed 9/30

1:10 pm-9:25 pm

1 stop6h 15m

$273

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Tue 9/29

5:30 am-11:05 am

1 stop7h 35m

Ontario

Mon 10/5

1:04 pm-9:11 pm

1 stop6h 07m

$294

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Thu 11/26

5:00 am-11:10 am

1 stop8h 10m

Ontario

Tue 12/1

3:20 pm-10:40 pm

1 stop5h 20m

$295

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Tue 9/29

12:22 pm-6:53 pm

1 stop8h 31m

Ontario

Mon 10/5

7:34 pm-8:07 am

2 stops10h 33m

$316

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Thu 9/24

2:39 pm-8:58 pm

1 stop8h 19m

Ontario

Tue 9/29

6:00 am-5:19 pm

1 stop9h 19m

$319

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Tue 9/29

7:01 am-6:17 pm

2 stops13h 16m

Ontario

Mon 10/5

7:34 pm-8:07 am

2 stops10h 33m

$321

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Thu 9/24

2:20 pm-10:59 pm

2 stops10h 39m

Ontario

Tue 9/29

5:00 am-1:31 pm

1 stop6h 31m

$325

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Mon 8/31

12:51 pm-7:53 pm

1 stop9h 02m

Ontario

Sat 9/5

12:00 pm-11:53 pm

1 stop9h 53m

$335

MilwaukeeOntario

MKE Milwaukee-Mitchell - ONT Ontario

MKEONT

Milwaukee-Mitchell

Fri 11/6

4:31 pm-11:06 pm

1 stop8h 35m

Ontario

Tue 11/10

6:00 am-3:33 pm

1 stop7h 33m

$344

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 typical price of a round-trip flight between Milwaukee and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $356 to $437.
The lowest price recently found on this route was $268.

What is the cheapest month to fly to Ontario?

In general, September 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 $327. If you aren’t able to travel during the month of September, then book flights to Ontario from Milwaukee during April instead. Flights to Ontario in April, while not as cheap as those in September, still average around $371.

How have Milwaukee to Ontario flight prices changed over time?

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

Fastest flight time

6h 03m

Direct flights

None
The fastest flight from Milwaukee to Ontario takes 6h 03m
There are no direct flights from Milwaukee to Ontario. There are no popular flight routes from Milwaukee to Ontario.
Search flight deals

Frequently asked questions about flying from Milwaukee to Ontario

  • How far is Milwaukee-Mitchell to Ontario by plane?

    There are 1710.4 mi between Milwaukee-Mitchell and Ontario. 6h 03m 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
United AirlinesPriceFrom $306Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights
SouthwestPriceFrom $327Free CancellationRating
8.0
4,220 reviews
Search Southwest flights
American AirlinesPriceFrom $356Free CancellationRating
7.1
11,903 reviews
Search American 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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