Cheap flights from Ontario to Milwaukee from $143
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 6/30. 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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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 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 $346, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Milwaukee, with average flight prices from Ontario averaging around $351.
What is the cheapest day to depart on your flight to Milwaukee?
According to our data, Thursday is the cheapest day to fly to Milwaukee from Ontario. The lowest ticket price found for a Thursday departure recently was $181. 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 Saturday will generally be more expensive and average around $408. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Milwaukee?
In the morning is the cheapest time of day to fly from Ontario to Milwaukee when you can find flight prices for as low as $180. Flying to Milwaukee in the morning is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $463 per ticket.
How far in advance should I book a flight to Milwaukee?
You are more likely to see cheaper flights to Milwaukee from Ontario when booking 8 weeks ahead of your departure date. In general, you can expect to find flights to Milwaukee for around $406 when searching 8 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Milwaukee from Ontario for as low as $303 on momondo.
What is the cheapest airline that flies from Ontario to Milwaukee-Mitchell?
Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Ontario to Milwaukee-Mitchell
What airlines fly to Milwaukee?
American Airlines, United Airlines and Spirit Airlines 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 42% of people opting to fly with this airline when traveling to Milwaukee. Keep in mind that there are 10 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
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 27m, 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 June 2025, there are 5 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 49% of all bookings. The subsequent popular airlines are American Airlines at 30%, Delta at 12%, and United Airlines at 5%.
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 $140 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $253 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $326 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $391 | Free Cancellation | Rating 7.4 8,790 reviews |
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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.