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Cheap flights from Milwaukee to Los Angeles from $119

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 3/16. 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
0 bags

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Find the cheapest flights from Milwaukee to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:37 pm - 11:55 pm
MKE
-
ONT
6h 18m
1 stop
Frontier Logo
5:33 pm - 6:59 pm
ONT
-
MKE
23h 26m
1 stop
$201Frontier
sex, abr 17 - dom, abr 19
Frontier Logo
7:15 pm - 11:59 pm
MKE
-
ONT
6h 44m
1 stop
Frontier Logo
10:03 pm - 1:02 pm
ONT
-
MKE
12h 59m
1 stop
$214Frontier
seg, mar 16 - qua, mar 25
Frontier Logo
7:15 pm - 11:59 pm
MKE
-
ONT
6h 44m
1 stop
Frontier Logo
10:03 pm - 1:02 pm
ONT
-
MKE
12h 59m
1 stop
$221Frontier
seg, mar 16 - qua, mar 25
Frontier Logo
6:29 pm - 11:55 pm
MKE
-
ONT
7h 26m
1 stop
Frontier Logo
5:12 pm - 4:10 pm
ONT
-
MKE
20h 58m
1 stop
$222Frontier
sex, abr 24 - dom, abr 26
Frontier Logo
7:15 pm - 11:59 pm
MKE
-
ONT
6h 44m
1 stop
Frontier Logo
11:17 am - 1:02 pm
ONT
-
MKE
23h 45m
1 stop
$255Frontier
seg, mar 16 - seg, mar 23
Frontier Logo
7:46 pm - 11:59 pm
MKE
-
ONT
6h 13m
1 stop
Frontier Logo
6:15 am - 6:51 pm
ONT
-
MKE
10h 36m
1 stop
$270Frontier
sex, mar 6 - seg, mar 9
Frontier Logo
7:37 pm - 11:55 pm
MKE
-
ONT
6h 18m
1 stop
Frontier Logo
5:33 pm - 6:59 pm
ONT
-
MKE
23h 26m
1 stop
$292Frontier
sex, mai 8 - dom, mai 10
Alaska Airlines Logo
3:47 pm - 10:44 pm
MKE
-
ONT
8h 57m
1 stop
Alaska Airlines Logo
7:08 pm - 2:14 pm
ONT
-
MKE
17h 06m
1 stop
$295Alaska Airlines
qua, mar 11 - qua, abr 8
American Airlines Logo
11:23 am - 8:27 pm
MKE
-
ONT
11h 04m
1 stop
American Airlines Logo
10:55 am - 10:23 pm
ONT
-
MKE
9h 28m
1 stop
$300American Airlines
ter, abr 14 - sáb, abr 18
Multiple Airlines Logo
7:46 pm - 11:59 pm
MKE
-
ONT
6h 13m
1 stop
Multiple Airlines Logo
12:02 pm - 2:51 pm
ONT
-
MKE
24h 49m
1 stop
$304Multiple Airlines
seg, mar 9 - qua, mar 11

United Airlines flights from Milwaukee to Ontario

Our best United Airlines deals on Milwaukee to Ontario flight tickets
United Airlines
May 5
MKE8:15 amMilwaukee-Mitchell
6h 23m
1 stop
ONT12:38 pmOntario
May 13
ONT6:59 pmOntario
10h 50m
2 stops
MKE7:49 amMilwaukee-Mitchell
$322
United Airlines
Mar 16
MKE4:10 pmMilwaukee-Mitchell
6h 40m
1 stop
ONT8:50 pmOntario
Mar 24
ONT6:15 amOntario
13h 12m
2 stops
MKE9:27 pmMilwaukee-Mitchell
$342
United Airlines
Mar 3
MKE8:28 amMilwaukee-Mitchell
6h 15m
1 stop
ONT12:43 pmOntario
Mar 8
ONT11:59 pmOntario
8h 31m
1 stop
MKE10:30 amMilwaukee-Mitchell
$557

Frontier flights from Milwaukee to Ontario

Our best Frontier deals on Milwaukee to Ontario flight tickets
Frontier
Apr 17
MKE7:37 pmMilwaukee-Mitchell
6h 18m
1 stop
ONT11:55 pmOntario
Apr 19
ONT5:33 pmOntario
23h 26m
1 stop
MKE6:59 pmMilwaukee-Mitchell
$201
Frontier
Mar 16
MKE7:15 pmMilwaukee-Mitchell
6h 44m
1 stop
ONT11:59 pmOntario
Mar 25
ONT10:03 pmOntario
12h 59m
1 stop
MKE1:02 pmMilwaukee-Mitchell
$214
Frontier
Mar 16
MKE7:15 pmMilwaukee-Mitchell
6h 44m
1 stop
ONT11:59 pmOntario
Mar 25
ONT10:03 pmOntario
12h 59m
1 stop
MKE1:02 pmMilwaukee-Mitchell
$221

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 fevereiro 19, 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

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

sex 4/17

7:37 pm-11:55 pm

1 stop6h 18m

Ontario

dom 4/19

5:33 pm-6:59 pm

1 stop23h 26m

$201

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

seg 3/16

7:15 pm-11:59 pm

1 stop6h 44m

Ontario

qua 3/25

10:03 pm-1:02 pm

1 stop12h 59m

$214

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

seg 3/16

7:15 pm-11:59 pm

1 stop6h 44m

Ontario

qua 3/25

10:03 pm-1:02 pm

1 stop12h 59m

$221

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

sex 4/24

6:29 pm-11:55 pm

1 stop7h 26m

Ontario

dom 4/26

5:12 pm-4:10 pm

1 stop20h 58m

$222

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

seg 3/16

7:15 pm-11:59 pm

1 stop6h 44m

Ontario

seg 3/23

11:17 am-1:02 pm

1 stop23h 45m

$255

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

sex 3/6

7:46 pm-11:59 pm

1 stop6h 13m

Ontario

seg 3/9

6:15 am-6:51 pm

1 stop10h 36m

$270

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

sex 5/8

7:37 pm-11:55 pm

1 stop6h 18m

Ontario

dom 5/10

5:33 pm-6:59 pm

1 stop23h 26m

$292

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

qua 3/11

3:47 pm-10:44 pm

1 stop8h 57m

Ontario

qua 4/8

7:08 pm-2:14 pm

1 stop17h 06m

$295

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

ter 4/14

11:23 am-8:27 pm

1 stop11h 04m

Ontario

sáb 4/18

10:55 am-10:23 pm

1 stop9h 28m

$300

MilwaukeeOntario

MKE - ONT

MKEONT

Milwaukee-Mitchell

seg 3/9

7:46 pm-11:59 pm

1 stop6h 13m

Ontario

qua 3/11

12:02 pm-2:51 pm

1 stop24h 49m

$304

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, January 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 $306. If you aren’t able to travel during the month of January, then book flights to Ontario from Milwaukee during September instead. Flights to Ontario in September, while not as cheap as those in January, still average around $364.

How have Milwaukee to Ontario flight prices changed over time?

As of February 2026, prices for Milwaukee to Ontario flights are approximately 7% 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

Fastest flight time

5h 50m

Direct flights

None
The fastest flight from Milwaukee to Ontario takes 5h 50m
There are no direct flights from Milwaukee to Ontario. There are no popular flight routes from Milwaukee to Ontario.
Search flight deals

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

    There are 1710.4 mi between Milwaukee-Mitchell and Ontario. 5h 50m 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
DeltaPriceFrom $300Free CancellationRating
7.9
8,212 reviews
Search Delta flights
American AirlinesPriceFrom $324Free CancellationRating
7.2
11,313 reviews
Search American Airlines flights
SouthwestPriceFrom $330Free CancellationRating
8.0
4,295 reviews
Search Southwest flights
United AirlinesPriceFrom $344Free CancellationRating
7.4
9,321 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.

An easier way to manage your Ontario trip

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