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MKE - ONT

$80 Find cheap flights from Milwaukee to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Milwaukee to Ontario departing on 6/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
sáb. 6/29
sáb. 7/6

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Milwaukee to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Milwaukee to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Milwaukee to Ontario (MKE-ONT)

 
These are the cheapest deals for flights from Milwaukee to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Milwaukee to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Milwaukee to Ontario.

Recent one-way flight deals from Milwaukee to Ontario

Only flying one-way? Below are some of the best one-way flight deals from Milwaukee to Ontario found on KAYAK recently.

Recent last minute flight deals from Milwaukee to Ontario

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Milwaukee to Ontario.

Recent direct flight deals from Milwaukee to Ontario

The latest deals for direct flights from Milwaukee to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Milwaukee to Ontario

Find recent round-trip train or bus tickets from Milwaukee to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:29 am - 11:49 pmMKE-ONT
16h 20m1 stop
12:49 am - 8:38 amONT-MKE
5h 49m1 stop
$170Frontier
Find Deal
sáb., jun. 15 - vie., jun. 21
9:29 am - 11:49 pmMKE-ONT
16h 20m1 stop
11:59 am - 8:24 amONT-MKE
18h 25m1 stop
$187Frontier
Find Deal
sáb., jun. 15 - jue., jun. 20
3:30 pm - 11:59 pmMKE-ONT
10h 29m2 stops
1:21 pm - 9:26 pmONT-MKE
6h 05m1 stop
$381Delta
Find Deal
jue., ago. 1 - lun., ago. 5
5:30 pm - 10:05 pmMKE-ONT
6h 35m1 stop
10:38 pm - 9:51 amONT-MKE
9h 13m1 stop
$415American Airlines
Find Deal
jue., ago. 1 - lun., ago. 5
4:26 pm - 11:00 pmMKE-ONT
8h 34m1 stop
10:00 pm - 9:09 amONT-MKE
9h 09m1 stop
$418Delta
Find Deal
sáb., jun. 15 - lun., jun. 17
12:44 pm - 9:27 pmMKE-ONT
10h 43m1 stop
6:30 am - 1:54 pmONT-MKE
5h 24m1 stop
$451American Airlines
Find Deal
sáb., jun. 15 - sáb., jun. 22
7:45 am - 3:29 pmMKE-ONT
9h 44m1 stop
4:24 pm - 11:59 pmONT-MKE
29h 35m1 stop
$455Alaska Airlines
Find Deal
jue., jul. 4 - mar., jul. 9
7:00 am - 3:33 pmMKE-ONT
10h 33m1 stop
8:49 pm - 1:35 pmONT-MKE
14h 46m1 stop
$469Alaska Airlines
Find Deal
sáb., sep. 28 - lun., sep. 30
2:42 pm - 8:48 pmMKE-ONT
8h 06m1 stop
1:30 pm - 9:28 pmONT-MKE
5h 58m1 stop
$508United Airlines
Find Deal
mar., jun. 25 - jue., ago. 15
10:45 am - 5:28 pmMKE-ONT
8h 43m1 stop
5:10 am - 11:59 pmONT-MKE
16h 49m1 stop
$516United Airlines
Find Deal
mié., jun. 26 - lun., jul. 1
9:29 am - 11:57 pmMKE-ONT
16h 28m1 stop
$80Frontier
Find Deal
sáb., jun. 8
9:29 am - 11:57 pmMKE-ONT
16h 28m1 stop
$81Frontier
Find Deal
sáb., jun. 8
2:44 pm - 9:40 pmMKE-ONT
8h 56m1 stop
$194American Airlines
Find Deal
mar., jun. 11
9:48 am - 7:42 pmMKE-ONT
11h 54m2 stops
$199Delta
Find Deal
mar., jun. 11
7:15 am - 12:22 pmMKE-ONT
7h 07m1 stop
$219Delta
Find Deal
jue., nov. 7
7:00 am - 3:26 pmMKE-ONT
10h 26m1 stop
$224Alaska Airlines
Find Deal
mié., jun. 12
12:44 pm - 9:40 pmMKE-ONT
10h 56m2 stops
$232American Airlines
Find Deal
vie., jun. 21
5:15 am - 10:27 pmMKE-ONT
19h 12m2 stops
$264United Airlines
Find Deal
mié., jun. 19
9:21 am - 10:15 pmMKE-ONT
14h 54m2 stops
$269Alaska Airlines
Find Deal
jue., sep. 12
7:17 am - 10:27 pmMKE-ONT
17h 10m2 stops
$302United Airlines
Find Deal
sáb., jun. 8
9:34 am - 3:45 pmMKE-ONT
8h 11m1 stop
12:48 am - 8:38 amONT-MKE
5h 50m1 stop
$239Frontier
Find Deal
lun., jun. 3 - vie., jun. 7
9:34 am - 3:45 pmMKE-ONT
8h 11m1 stop
12:59 am - 8:43 amONT-MKE
5h 44m1 stop
$244Frontier
Find Deal
lun., jun. 3 - mar., jun. 4
9:34 am - 3:45 pmMKE-ONT
8h 11m1 stop
12:44 am - 8:29 amONT-MKE
5h 45m1 stop
$293Frontier
Find Deal
lun., jun. 3 - jue., jun. 6
9:34 am - 3:45 pmMKE-ONT
8h 11m1 stop
12:59 am - 10:23 amONT-MKE
7h 24m1 stop
$299Frontier
Find Deal
lun., jun. 3 - dom., jun. 9
2:42 pm - 8:48 pmMKE-ONT
8h 06m1 stop
5:15 am - 11:59 pmONT-MKE
16h 44m1 stop
$680United Airlines
Find Deal
lun., jun. 3 - sáb., jun. 8
6:00 am - 11:40 amMKE-ONT
7h 40m1 stop
1:25 pm - 9:30 pmONT-MKE
6h 05m1 stop
$693Delta
Find Deal
mar., jun. 4 - sáb., jun. 8
10:45 am - 5:28 pmMKE-ONT
8h 43m1 stop
5:15 am - 10:20 pmONT-MKE
15h 05m2 stops
$725United Airlines
Find Deal
lun., jun. 3 - sáb., jun. 8
6:00 am - 11:39 amMKE-ONT
7h 39m1 stop
6:00 am - 5:41 pmONT-MKE
9h 41m1 stop
$751Delta
Find Deal
sáb., jun. 1 - lun., jun. 3
7:00 am - 3:26 pmMKE-ONT
10h 26m1 stop
6:00 am - 9:03 pmONT-MKE
13h 03m2 stops
$807Alaska Airlines
Find Deal
mar., jun. 4 - sáb., jun. 8
7:00 am - 3:26 pmMKE-ONT
10h 26m1 stop
6:00 am - 9:03 pmONT-MKE
13h 03m2 stops
$813Alaska Airlines
Find Deal
lun., jun. 3 - sáb., jun. 8

Flights from Milwaukee to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Milwaukee to Ontario to help you find the cheapest flights, the best time to fly and much more.

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

The average price of all flights from Milwaukee to Ontario clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Milwaukee to Ontario, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Ontario, Saturday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Milwaukee to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Milwaukee to Ontario is September, where tickets cost $237 on average. On the other hand, the most expensive months are March and December, where the average cost of tickets is $531 and $514 respectively.

Which airlines provide the cheapest flights from Milwaukee to Ontario?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Milwaukee to Ontario found by KAYAK users in the last 72 hours was for $170 on Frontier, followed by Delta ($381). One-way flight deals have also been found from as low as $80 on Frontier and from $194 on American Airlines.

Good to know

Low season

July

High season

August

Cheapest flight

$80
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 31% increase in price.
Flight from Milwaukee to Ontario

When to book flights from Milwaukee to Ontario

Are your dates flexible? Find out the best times to travel from Milwaukee to Ontario 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.

FAQs for booking flights from Milwaukee to Ontario

  • What is the cheapest flight from Milwaukee to Ontario?

    In the last 3 days, the lowest price for a flight from Milwaukee to Ontario was $80 for a one-way ticket and $170 for a round-trip.

  • Do I need a passport to fly between Milwaukee and Ontario?

    No

  • Which airports will I be using when flying from Milwaukee to Ontario?

    Milwaukee airport is called Milwaukee-Mitchell and the only airport in Ontario is Ontario.

  • Which aircraft models fly most regularly from Milwaukee to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Milwaukee to Ontario?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Milwaukee and Ontario, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Milwaukee to Ontario, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Milwaukee to Ontario are Delta and United Airlines. With an average price for the route of $427 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $522 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Milwaukee to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Milwaukee to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Milwaukee to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Milwaukee is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Milwaukee to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Milwaukee with another airline. Booking your flights between Milwaukee and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Milwaukee to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Milwaukee up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 4 airlines serving from Milwaukee to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Milwaukee to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Milwaukee to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10457 reviews
8.6Crew
8.2Boarding
8.0Entertainment
7.9Comfort
7.4Food
Airline reviews

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

8.0 ExcellentLiam, May 2024SLC - SJC
Read more about Delta reviews

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

There were delays on both ends. It made it less than excellent. This plane was great though

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

Worst experience I have seen. The flight was cancelled without any reason.

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Plane could have been more on time. More leg room .

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

Book cheap flights from Milwaukee to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Milwaukee to Ontario found on KAYAK in the last 72 hours.
6/8sáb.
1 stopFrontier
16h 28mMKE-ONT
$80
6/8sáb.
1 stopFrontier
16h 28mMKE-ONT
$81
6/11mar.
1 stopAmerican Airlines
8h 56mMKE-ONT
$194
6/11mar.
2 stopsDelta
11h 54mMKE-ONT
$199
11/7jue.
1 stopDelta
7h 07mMKE-ONT
$219
6/12mié.
1 stopAlaska Airlines
10h 26mMKE-ONT
$224
6/21vie.
2 stopsAmerican Airlines
10h 56mMKE-ONT
$232
6/19mié.
2 stopsUnited Airlines
19h 12mMKE-ONT
$264
9/12jue.
2 stopsAlaska Airlines
14h 54mMKE-ONT
$269
6/8sáb.
2 stopsUnited Airlines
17h 10mMKE-ONT
$302

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Last minute flights from Milwaukee to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Milwaukee to Ontario that are departing in the next 10 days.
6/3lun.
multi-stopFrontier
8h 11mMKE-ONT
6/7vie.
multi-stopFrontier
5h 50mONT-MKE
$239
6/3lun.
multi-stopFrontier
8h 11mMKE-ONT
6/4mar.
multi-stopFrontier
5h 44mONT-MKE
$244
6/3lun.
multi-stopFrontier
8h 11mMKE-ONT
6/6jue.
multi-stopFrontier
5h 45mONT-MKE
$293
6/3lun.
multi-stopFrontier
8h 11mMKE-ONT
6/9dom.
multi-stopFrontier
7h 24mONT-MKE
$299
6/3lun.
multi-stopUnited Airlines
8h 06mMKE-ONT
6/8sáb.
multi-stopUnited Airlines
16h 44mONT-MKE
$680
6/4mar.
multi-stopDelta
7h 40mMKE-ONT
6/8sáb.
multi-stopDelta
6h 05mONT-MKE
$693
6/3lun.
multi-stopUnited Airlines
8h 43mMKE-ONT
6/8sáb.
multi-stopUnited Airlines
15h 05mONT-MKE
$725
6/1sáb.
multi-stopDelta
7h 39mMKE-ONT
6/3lun.
multi-stopDelta
9h 41mONT-MKE
$751
6/4mar.
multi-stopAlaska Airlines
10h 26mMKE-ONT
6/8sáb.
multi-stopAlaska Airlines
13h 03mONT-MKE
$807
6/3lun.
multi-stopAlaska Airlines
10h 26mMKE-ONT
6/8sáb.
multi-stopAlaska Airlines
13h 03mONT-MKE
$813

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Milwaukee - Ontario Flights

Departure:

Milwaukee (MKE)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Milwaukee

Cabin classes: