Cheap flights from Milwaukee to Ontario (MKE - ONT)

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The best prices from Milwaukee Milwaukee-Mitchell to Ontario are usually found in August or September, booked 60 days in advance, depart on a Monday or Saturday and return on a Tuesday

How to find the cheapest flight from
Milwaukee (MKE) to Ontario (ONT)

All the information you need to plan the best MKE to ONT flight in 2022: compare Milwaukee to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.
MKE - ONT
Price
$221 - $456
ONT
Temperature
53.6 - 78.8 °F
ONT
Precipitation
0.1 - 3.4 inches

Popular in

November

High demand for flights, 22% potential price rise

Cheapest in

August

Best time to find cheap flights, 38% potential price drop

Round-trip from

$221

From Milwaukee Milwaukee-Mitchell to Ontario

One-way from

$105

One-way flight from Milwaukee Milwaukee-Mitchell to Ontario

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Milwaukee to Ontario?

Travelers have found that booking a Sunday departure is the best way to save up to 57% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Milwaukee to Ontario?

To save on the cost of your flight from Milwaukee to Ontario, book at least 38 days before your planned departure. Booking around this time can save you about 3% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $316 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $316.

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

August is one of the best times of the year to fly to Ontario from Milwaukee. Prices for August average $320 per person but you can even find prices for as low as $180. The most expensive prices can be found in the month of December. Opting for a August flight can save you 50% on your journey compared to booking in August

When is the cheapest time to fly from Milwaukee to Ontario (MKE - ONT)?

It’s typically best to fly out from Milwaukee to Ontario in the evening. Doing so could potentially save you 43% on the flight price compared to flying at noon, which is usually more expensive.

Cheap flights from Milwaukee to Ontario in January, February 2022

The best prices found for MKE to ONT flights for January, February
5 Feb - 12 Feb
$157pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell
26 Feb - 2 Mar
$158pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell
7 Feb - 10 Feb
$184pp
MKE
Milwaukee Milwaukee-Mitchell
American Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
American Airlines
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell

Milwaukee Milwaukee-Mitchell to Ontario 2022 flight deals

Cheap flights to Ontario from Milwaukee found for this year
12 Apr - 27 Apr
$147pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell
5 Apr - 27 Apr
$150pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Multiple Airlines
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell
5 Feb - 12 Feb
$157pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell

Last minute flights from Milwaukee to Ontario

Late deals on round-trip flights to Ontario from Milwaukee, departing today and this week
28 Jan - 30 Jan
$288pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
Frontier
   
2 STOPS
MKE
Milwaukee Milwaukee-Mitchell
28 Jan - 30 Jan
$349pp
MKE
Milwaukee Milwaukee-Mitchell
Multiple Airlines
     
3 STOPS
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell
29 Jan - 5 Feb
$356pp
MKE
Milwaukee Milwaukee-Mitchell
American Airlines
 
1 STOP
ONT
Ontario
ONT
Ontario
American Airlines
 
1 STOP
MKE
Milwaukee Milwaukee-Mitchell

One-way flights to Ontario from Milwaukee

The cheapest one-way flights from Milwaukee to Ontario
9:30 am - 3:03 am
Multiple Airlines
1 Stop
19h 33m
MKE - ONT
Multiple Airlines
$105
Kiwi.com
4:02 am - 8:25 pm
United Airlines
2 Stops
18h 23m
MKE - ONT
United Airlines
$212
United
8:24 am - 5:16 am
Frontier
2 Stops
22h 52m
MKE - ONT
Frontier
$225
JustFly

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Milwaukee</span> to <span class="emphasized">Ontario</span> flights.

Flight FAQs

From Milwaukee to Ontario

Which airlines flying from Milwaukee Milwaukee-Mitchell to Ontario have flexible cancellations due to COVID-19?

Some of our airline partners flying from Milwaukee Milwaukee-Mitchell to Ontario have new flexible policies in place due to COVID-19. American Airlines, United Airlines, and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Milwaukee to Ontario for under $200 on Cheapflights?

Yes, there are multiple flights from Milwaukee to Ontario for under $200. The cheapest flight booked recently is on Multiple Airlines for just $147, but on average you can expect to pay $190.

Are there last-minute flights available from Milwaukee to Ontario for under $300?

There are currently 20+ open flights from Milwaukee to Ontario within the next 7 days for less than $300.

What are the cheapest airlines flying from Milwaukee to Ontario round-trip?

Our cheapest airline available from Milwaukee to Ontario is American Airlines. Our recent data shows that you can find tickets from as low as $184 on this airline. An additional option worth looking into is Frontier, starting at $229. American Airlines is priced at 48% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Milwaukee to Ontario one-way?

The cheapest airlines for a one-way flight from Milwaukee to Ontario are Frontier ($95), Alaska Airlines ($137), and American Airlines ($155).

What are the cheapest flights from Milwaukee to Ontario?

Looking at all options, your cheapest flight can be booked for $41. While the most popular route (Milwaukee Milwaukee-Mitchell - Ontario) can be booked for $161 on average our data indicates $879 when flying from Milwaukee to Ontario.

What are the most popular airlines that fly from Milwaukee to Ontario?

American Airlines, Delta and Frontier are the most popular airlines when flying from Milwaukee to Ontario.

COVID Restrictions

View COVID Travel Restrictions for Ontario, CA

Do I need a COVID test to fly to Ontario from Milwaukee?

Information is based on travel restrictions for travel to Ontario within the United States

Most visitors from Milwaukee Milwaukee-Mitchell need to provide a negative COVID-19 test result and/or quarantine to enter Ontario.

COVID-19 testing requirements
Visitors from Milwaukee Milwaukee-Mitchell must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Ontario.

Quarantine requirements
Visitors from Milwaukee Milwaukee-Mitchell are not required to quarantine after entering Ontario.

Do I need a test to fly back to Milwaukee from Ontario?

Returning to Milwaukee Milwaukee-Mitchell from Ontario

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Milwaukee Milwaukee-Mitchell.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Milwaukee Milwaukee-Mitchell.

Hide COVID Travel Restrictions for Ontario, CA

Alternative routes for Milwaukee to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Ontario

Things to know before you go - useful duration and weather info for your trip from Milwaukee to Ontario.

Airports servicing Milwaukee

Airports servicing Ontario

Top 4 airlines flying from Milwaukee Milwaukee-Mitchell to Ontario

The chart below displays the airlines Cheapflights users traveling from Milwaukee to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$119 $227 No cancel fee 62%
American Airlines
$124 $379 No cancel fee 71%
United Airlines
$141 $334 No cancel fee 69%
Delta
$154 $325 No cancel fee N/A

Hourly flight availability from Milwaukee to Ontario

See what time of day planes typically take off from Milwaukee towards Ontario.
Afternoon Noon to 6 PM 100% of MKE to ONT departures
Early morning Midnight to 6 AM 0% of MKE to ONT departures
Morning 6 AM to noon 0% of MKE to ONT departures
Evening 6 PM to midnight 0% of MKE to ONT departures
Midnight
6 AM
Noon
6 PM
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