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Cheap flights from Milwaukee to Los Angeles from $148

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 10/13. 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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0 bags

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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
$193Frontier
Find Deal
Fri, Nov 14 - Mon, Nov 17
Frontier Logo
8:04 pm - 11:50 pmMKE-ONT
5h 46m1 stop
Frontier Logo
6:53 am - 7:18 pmONT-MKE
10h 25m1 stop
$196Frontier
Find Deal
Fri, Oct 17 - Mon, Oct 20
Delta Logo
3:13 pm - 11:04 pmMKE-ONT
9h 51m1 stop
Delta Logo
7:05 am - 4:17 pmONT-MKE
7h 12m1 stop
$277Delta
Find Deal
Mon, Nov 24 - Thu, Nov 27
Delta Logo
3:13 pm - 11:04 pmMKE-ONT
9h 51m1 stop
Delta Logo
6:00 am - 4:55 pmONT-MKE
8h 55m2 stops
$282Delta
Find Deal
Mon, Nov 24 - Thu, Nov 27
American Airlines Logo
3:09 pm - 10:23 pmMKE-ONT
9h 14m1 stop
American Airlines Logo
6:11 am - 2:24 pmONT-MKE
6h 13m1 stop
$301American Airlines
Find Deal
Sun, Nov 23 - Thu, Nov 27
American Airlines Logo
7:00 am - 3:24 pmMKE-ONT
10h 24m1 stop
American Airlines Logo
6:10 am - 5:04 pmONT-MKE
8h 54m1 stop
$312American Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
3:49 pm - 10:31 pmMKE-ONT
8h 42m1 stop
United Airlines Logo
5:05 am - 1:14 pmONT-MKE
6h 09m1 stop
$366United Airlines
Find Deal
Tue, Nov 25 - Fri, Nov 28
United Airlines Logo
5:00 am - 12:37 pmMKE-ONT
9h 37m2 stops
United Airlines Logo
5:05 am - 1:14 pmONT-MKE
6h 09m1 stop
$371United Airlines
Find Deal
Tue, Nov 25 - Fri, Nov 28
Alaska Airlines Logo
3:56 pm - 11:32 pmMKE-ONT
9h 36m1 stop
Alaska Airlines Logo
11:59 am - 3:00 pmONT-MKE
25h 01m1 stop
$388Alaska Airlines
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Fri, Nov 14 - Tue, Nov 18
Alaska Airlines Logo
2:36 pm - 10:37 pmMKE-ONT
10h 01m1 stop
Alaska Airlines Logo
6:00 am - 1:45 pmONT-MKE
29h 45m1 stop
$389Alaska Airlines
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Thu, Feb 26 - Wed, Mar 4

Frontier flights from Milwaukee to Ontario

Our best Frontier deals on Milwaukee to Ontario flight tickets
Frontier
Nov 14
MKE8:04 pmMilwaukee-Mitchell
5h 46m
1 stop
ONT11:50 pmOntario
Nov 17
ONT6:53 amOntario
10h 26m
1 stop
MKE7:19 pmMilwaukee-Mitchell
$193
Find similar
Frontier
Oct 17
MKE8:04 pmMilwaukee-Mitchell
5h 46m
1 stop
ONT11:50 pmOntario
Oct 20
ONT6:53 amOntario
10h 25m
1 stop
MKE7:18 pmMilwaukee-Mitchell
$196
Find similar
Frontier
Nov 7
MKE8:04 pmMilwaukee-Mitchell
5h 46m
1 stop
ONT11:50 pmOntario
Nov 10
ONT6:53 amOntario
10h 26m
1 stop
MKE7:19 pmMilwaukee-Mitchell
$238
Find similar

Delta flights from Milwaukee to Ontario

Our best Delta deals on Milwaukee to Ontario flight tickets
Delta
Nov 24
MKE3:13 pmMilwaukee-Mitchell
9h 51m
1 stop
ONT11:04 pmOntario
Nov 27
ONT7:05 amOntario
7h 12m
1 stop
MKE4:17 pmMilwaukee-Mitchell
$277
Find similar
Delta
Nov 24
MKE3:13 pmMilwaukee-Mitchell
9h 51m
1 stop
ONT11:04 pmOntario
Nov 27
ONT6:00 amOntario
8h 55m
2 stops
MKE4:55 pmMilwaukee-Mitchell
$282
Find similar
Delta
Oct 1
MKE2:59 pmMilwaukee-Mitchell
9h 24m
1 stop
ONT10:23 pmOntario
Oct 3
ONT10:00 pmOntario
9h 24m
1 stop
MKE9:24 amMilwaukee-Mitchell
$286
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 September 15, 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 11/14

8:04 pm-11:50 pm

1 stop5h 46m

Ontario

Mon 11/17

6:53 am-7:19 pm

1 stop10h 26m

$193

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 10/17

8:04 pm-11:50 pm

1 stop5h 46m

Ontario

Mon 10/20

6:53 am-7:18 pm

1 stop10h 25m

$196

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Mon 11/24

3:13 pm-11:04 pm

1 stop9h 51m

Ontario

Thu 11/27

7:05 am-4:17 pm

1 stop7h 12m

$277

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Mon 11/24

3:13 pm-11:04 pm

1 stop9h 51m

Ontario

Thu 11/27

6:00 am-4:55 pm

2 stops8h 55m

$282

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Sun 11/23

3:09 pm-10:23 pm

1 stop9h 14m

Ontario

Thu 11/27

6:11 am-2:24 pm

1 stop6h 13m

$301

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Wed 10/29

7:00 am-3:24 pm

1 stop10h 24m

Ontario

Wed 11/5

6:10 am-5:04 pm

1 stop8h 54m

$312

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Tue 11/25

3:49 pm-10:31 pm

1 stop8h 42m

Ontario

Fri 11/28

5:05 am-1:14 pm

1 stop6h 09m

$366

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Tue 11/25

5:00 am-12:37 pm

2 stops9h 37m

Ontario

Fri 11/28

5:05 am-1:14 pm

1 stop6h 09m

$371

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Fri 11/14

3:56 pm-11:32 pm

1 stop9h 36m

Ontario

Tue 11/18

11:59 am-3:00 pm

1 stop25h 01m

$388

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

Thu 2/26

2:36 pm-10:37 pm

1 stop10h 01m

Ontario

Wed 3/4

6:00 am-1:45 pm

1 stop29h 45m

$389

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, August 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 $376. If you aren’t able to travel during the month of August, then book flights to Ontario from Milwaukee during November instead. Flights to Ontario in November, while not as cheap as those in August, still average around $386.

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 September 2025, prices for Milwaukee to Ontario flights are approximately 9% 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 46m 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
SouthwestPriceFrom $336Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
DeltaPriceFrom $336Free CancellationRating
7.9
7,954 reviews
Search Delta flights
United AirlinesPriceFrom $344Free CancellationRating
7.4
8,929 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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