Cheap flights from Ontario to Milwaukee from $130
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Milwaukee departing on 11/25. 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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Fly from
Fly to
Route
Depart
Return
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Thu 2/18
12:49 pm-9:34 pm
1 stop6h 45m
Milwaukee-Mitchell
Mon 2/22
2:50 pm-6:50 pm
1 stop6h 00m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Sat 11/7
1:05 pm-10:20 pm
1 stop7h 15m
Milwaukee-Mitchell
Mon 11/9
7:40 pm-11:40 pm
1 stop6h 00m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Tue 11/17
3:50 pm-11:15 pm
1 stop5h 25m
Milwaukee-Mitchell
Mon 11/23
7:40 pm-11:40 pm
1 stop6h 00m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Tue 12/1
12:50 pm-11:15 pm
1 stop8h 25m
Milwaukee-Mitchell
Wed 12/16
5:15 am-12:10 pm
1 stop8h 55m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Thu 2/18
7:31 pm-9:36 am
2 stops12h 05m
Milwaukee-Mitchell
Mon 2/22
2:50 pm-6:50 pm
1 stop6h 00m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Sat 10/31
7:07 am-5:25 pm
1 stop8h 18m
Milwaukee-Mitchell
Sat 11/7
7:05 am-12:36 pm
1 stop7h 31m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Wed 12/2
1:11 pm-9:52 pm
1 stop6h 41m
Milwaukee-Mitchell
Tue 12/8
3:12 pm-8:58 pm
1 stop7h 46m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Mon 11/16
11:10 pm-9:15 am
1 stop8h 05m
Milwaukee-Mitchell
Wed 11/18
7:30 am-12:17 pm
1 stop6h 47m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Tue 12/1
7:45 pm-7:58 am
2 stops10h 13m
Milwaukee-Mitchell
Wed 12/16
8:41 am-6:10 pm
2 stops11h 29m
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Wed 10/28
12:43 pm-9:52 pm
1 stop7h 09m
Milwaukee-Mitchell
Wed 11/4
7:05 am-11:52 am
1 stop6h 47m
See travel insights to Milwaukee from
How to get the cheapest flight ticket from Ontario to Milwaukee
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 Ontario and Milwaukee?
Prices are currently low for flights on this route.
Typical prices usually range from $439 to $527.The lowest price recently found on this route was $267.
What is the cheapest month to fly to Milwaukee?
The cheapest month to fly to Milwaukee from Ontario is in November. Flight prices, which tend to average around $426, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Milwaukee, with average flight prices from Ontario averaging around $426.
What is the cheapest day to depart on your flight to Milwaukee?
According to our data, Sunday is the cheapest day to fly to Milwaukee from Ontario. The lowest ticket price found for a Sunday departure recently was $169. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Ontario to Milwaukee on a Thursday will generally be more expensive and average around $181. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest airline that flies from Ontario to Milwaukee-Mitchell?
Delta, Southwest, and United Airlines are the most popular carriers operating from Ontario to Milwaukee-Mitchell
What airlines fly to Milwaukee?
American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Milwaukee from Ontario according to our data. American Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Milwaukee. Keep in mind that there are 8 different airlines that fly to Milwaukee on a routine basis, so you have a few additional options to choose from.
When to book flights from Ontario to Milwaukee
Cheap Ontario to Milwaukee (ONT to MKE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Milwaukee
Frequently asked questions about flying from Ontario to Milwaukee
How far is Ontario to Milwaukee-Mitchell by plane?
The straight-line distance from Ontario to Milwaukee-Mitchell is 1710.4 mi. Flights usually cover this in 5h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Ontario Airport to Milwaukee-Mitchell Airport?
Prices for flights from Ontario Airport to Milwaukee-Mitchell Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Milwaukee-Mitchell Airport?
As of October 2026, there are 2 operators available to choose from for flights from Ontario Airport to Milwaukee-Mitchell Airport.
How old do you have to be to fly from Ontario Airport to Milwaukee-Mitchell Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Milwaukee-Mitchell Airport.
What documentation or ID do you need to fly to Milwaukee-Mitchell Airport?
The travel and health documents required for your trip to Milwaukee-Mitchell 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 Milwaukee-Mitchell 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 Ontario to Milwaukee?
momondo data reveals that the most frequently booked airline on the route from Ontario to Milwaukee is Southwest, representing 69% of all bookings. The subsequent popular airline is American Airlines at 31%.
Best airlines flying from Ontario to Milwaukee
Compare and see reviews for airlines that fly from Ontario to Milwaukee with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $354 | Free Cancellation | Rating 7.9 4,228 reviews | |||
| PriceFrom $366 | Free Cancellation | Rating 7.0 12,150 reviews |
Traveling to a place near Milwaukee?
Book flights to Milwaukee if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to Milwaukee?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Milwaukee. momondo saves you time and could save you money on your trip.
Can I find flights from Ontario to Milwaukee with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ontario to Milwaukee flights to just show those with flexible booking policies.
How can momondo help me find flights from Ontario to Milwaukee?
momondo provides multiple filters to help you find the best flight to Milwaukee from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ontario to Milwaukee right now. Can momondo alert me if prices change?
Price alerts on flights to Milwaukee from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.