MKE - ONT

$169 Find Cheap Flights from Milwaukee to Ontario - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$337
Typical prices: $399-$506
American Airlines
Sat 12/15Fri 1/5
MKE - ONT • 1 stop
Cheapest one-way
$169
Typical prices: $183-$298
Southwest
Mon 11/19
MKE - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Milwaukee and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
January
Cheapest • 30% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Denver Intl (DEN)
Cheapest • Avg $440 (round-trip)
Las Vegas Harry Reid Intl (LAS)
Shortest trip • 5h 54m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Milwaukee to Ontario (MKE-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Milwaukee to Ontario

Tue, Dec 15 - Tue, Jan 5
American Airlines Logo
12:15 pm - 6:47 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 32m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 3:22 pmONT  Ontario-MKE Milwaukee-Mitchell
7h 22m1 stop Phoenix Sky Harbor Intl
$337American Airlines
Thu, Jan 7 - Mon, Jan 11
Southwest Logo
5:00 am - 9:25 amMKE  Milwaukee-Mitchell-ONT Ontario
6h 25m1 stop Phoenix Sky Harbor Intl
Southwest Logo
6:10 am - 2:05 pmONT  Ontario-MKE Milwaukee-Mitchell
5h 55m1 stop Las Vegas Harry Reid Intl
$337Southwest
Thu, Dec 3 - Tue, Dec 15
Delta Logo
5:10 am - 11:08 amMKE  Milwaukee-Mitchell-ONT Ontario
7h 58m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:11 pm - 9:52 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 41m1 stop Salt Lake City
$337Delta
Thu, Dec 3 - Sat, Dec 12
Delta Logo
5:10 am - 11:08 amMKE  Milwaukee-Mitchell-ONT Ontario
7h 58m1 stop Atlanta Hartsfield-Jackson
Delta Logo
1:11 pm - 9:52 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 41m1 stop Salt Lake City
$337Delta
Tue, Dec 1 - Tue, Dec 8
Southwest Logo
5:15 am - 12:10 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 55m1 stop Phoenix Sky Harbor Intl
Southwest Logo
1:25 pm - 10:40 pmONT  Ontario-MKE Milwaukee-Mitchell
7h 15m1 stop Las Vegas Harry Reid Intl
$337Southwest
Mon, Dec 7 - Sat, Dec 12
Southwest Logo
4:45 pm - 8:35 pmMKE  Milwaukee-Mitchell-ONT Ontario
5h 50m1 stop Las Vegas Harry Reid Intl
Southwest Logo
1:25 pm - 8:45 pmONT  Ontario-MKE Milwaukee-Mitchell
5h 20m1 stop Denver Intl
$337Southwest
Tue, Dec 15 - Tue, Jan 5
American Airlines Logo
7:05 am - 1:31 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 26m1 stop Dallas/Fort Worth
American Airlines Logo
9:30 am - 8:00 pmONT  Ontario-MKE Milwaukee-Mitchell
8h 30m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$342American Airlines
Wed, Nov 18 - Tue, Dec 1
American Airlines Logo
7:05 am - 1:31 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 26m1 stop Dallas/Fort Worth
American Airlines Logo
7:45 pm - 7:48 amONT  Ontario-MKE Milwaukee-Mitchell
10h 03m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$342American Airlines
Wed, Oct 21 - Fri, Oct 30
United Airlines Logo
2:39 pm - 8:58 pmMKE  Milwaukee-Mitchell-ONT Ontario
8h 19m1 stop Denver Intl
United Airlines Logo
1:32 pm - 8:59 pmONT  Ontario-MKE Milwaukee-Mitchell
5h 27m1 stop Denver Intl
$353United Airlines
Wed, Nov 18 - Tue, Dec 1
United Airlines Logo
2:23 pm - 6:47 pmMKE  Milwaukee-Mitchell-ONT Ontario
6h 24m1 stop Chicago O'Hare Intl
United Airlines Logo
5:00 am - 1:23 pmONT  Ontario-MKE Milwaukee-Mitchell
6h 23m1 stop Denver Intl
$363United Airlines
Booking Insights

Price, demand and travel trends for Milwaukee to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Milwaukee to Ontario with more confidence.

How much is a round-trip flight from Milwaukee to Ontario?

Round-trip flights from Milwaukee to Ontario start at $337. Prices are below average for this route right now, with typical round-trip fares ranging from $399 to $506. The lowest price found in the past 5 days was $337 on American Airlines.

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

Saturday is the cheapest day of the week to fly from Milwaukee to Ontario, it is 15% cheaper than the average day. Friday is the most expensive day with flight prices 14% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • January is the cheapest month to fly from Milwaukee to Ontario at $306 round-trip.
  • February ($625) and June ($493) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 104% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Milwaukee to Ontario flights

Low season

September

Cheapest flight

$169
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 11% 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

Your Milwaukee to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Milwaukee to Ontario?

    Flights from Milwaukee to Ontario usually depart from Milwaukee-Mitchell (MKE) and arrive at Ontario (ONT).

  • What cabin classes can I book on flights from Milwaukee to Ontario?

    Only Economy Class is available on flights from Milwaukee to Ontario.

  • Which airports do connecting flights from Milwaukee to Ontario pass through?

    One-stop flights from Milwaukee to Ontario most commonly connect through:

    • Denver Intl (DEN) - 46% of one-stop connections
    • Phoenix Sky Harbor Intl (PHX) - 31% of one-stop connections
    • Salt Lake City (SLC) - 13% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 6% of one-stop connections

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Milwaukee to Ontario?

    On the Milwaukee to Ontario route, being flexible with your departure day can save you up to 26%. Saturday is the cheapest day at $371 round-trip on average, while Friday is the most expensive at $499: a $128 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • How long is a flight from Milwaukee to Ontario?

    A nonstop flight from Milwaukee to Ontario takes 0h 00m, covering 1,707 miles.

  • Do I need a passport to fly from Milwaukee to Ontario?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Milwaukee to Ontario changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $337 to $1,612. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Milwaukee to Ontario looking right now?

    One-way fares from Milwaukee to Ontario are currently lower than usual. Average one-way flight prices are about $199, which is 12% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from Milwaukee to Ontario?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 5h 54m, compared with 6h 18m via Denver Intl (DEN) and 6h 24m via Salt Lake City (SLC).

  • What is the time difference between Milwaukee and Ontario?

    Ontario is 2 hours behind Milwaukee (Pacific Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

  • How much should I expect to pay for a Milwaukee to Ontario flight?

    Round-trip flights from Milwaukee to Ontario range from $399 to $506, with an average of $436 over the past 12 months. Anything below $399 counts as a good deal.

Your guide to booking Milwaukee to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Saturday departure instead of Friday. On this route, Saturday flights average $371 - about $128 less than Friday (26% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Milwaukee to Ontario trip for January. Fares historically average $306 round-trip in that month - typically $319 less than the most expensive month, which is February (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG

More options for your flight from Milwaukee to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario