$146+ Cheap flights from Ontario to Milwaukee (ONT - MKE)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Milwaukee with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Milwaukee
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One-way
Cheapest flights from Ontario to MilwaukeeExplore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from Ontario to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:37 pm -
1 stop7h 11m
Sat 10/37:01 am -
1 stop8h 24m
Deal found 9/8![American Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:00 pm -
1 stop5h 15m
Thu 11/2612:55 pm -
1 stop5h 55m
Deal found 9/7![Southwest logo]()
$390
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:16 pm -
1 stop7h 07m
Fri 10/235:30 am -
1 stop7h 36m
Deal found 9/10![Delta logo]()
$394
This Southwest deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/191:55 pm -
1 stop5h 50m
Sat 11/218:00 pm -
1 stop5h 40m
Deal found 9/9![Southwest logo]()
$395
This American Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:25 am -
1 stop9h 27m
Tue 10/137:14 am -
1 stop8h 16m
Deal found 9/7![American Airlines logo]()
$413
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/245:45 am -
1 stop7h 10m
Tue 12/295:20 am -
1 stop10h 35m
Deal found 9/8![Southwest logo]()
$416
Best flights from Ontario to MilwaukeeDiscover carefully curated flight deals from Ontario to Milwaukee that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Ontario to Milwaukee that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:00 pm -
2 stops14h 09m
Tue 10/139:35 am -
2 stops12h 50m
Deal found 9/7![Delta logo]()
$443
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:00 am -
2 stops10h 43m
Wed 11/112:35 pm -
1 stop8h 16m
Deal found 9/8![United Airlines logo]()
$482
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:05 pm -
2 stops7h 45m
Mon 10/196:30 am -
2 stops11h 20m
Deal found 9/6![Southwest logo]()
$500
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:01 pm -
1 stop21h 34m
Fri 11/276:00 am -
1 stop11h 05m
Deal found 9/5![Alaska Airlines logo]()
$576
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:15 pm -
1 stop7h 56m
Sun 10/255:30 am -
1 stop7h 36m
Deal found 9/9![Delta logo]()
$449
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:35 pm -
1 stop6h 50m
Wed 10/76:55 am -
1 stop8h 00m
Deal found 9/10![Southwest logo]()
$560
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:13 pm -
1 stop18h 20m
Fri 11/204:33 pm -
1 stop8h 58m
Deal found 9/8![Alaska Airlines logo]()
$616
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:05 am -
1 stop8h 26m
Wed 10/72:59 pm -
2 stops10h 56m
Deal found 9/10![Delta logo]()
$565
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:55 am -
2 stops9h 30m
Tue 10/65:55 am -
2 stops9h 00m
Deal found 9/10![Southwest logo]()
$570
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:35 pm -
2 stops6h 50m
Mon 9/2811:45 am -
2 stops9h 40m
Deal found 9/6![Southwest logo]()
$613
Last-minute flights from Ontario to MilwaukeeDiscover last-minute flight deals from Ontario to Milwaukee. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Milwaukee. Data last updated September 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:37 pm -
1 stop7h 11m
Sat 10/37:01 am -
1 stop8h 24m
Deal found 9/8![American Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:25 am -
1 stop9h 27m
Tue 10/137:14 am -
1 stop8h 16m
Deal found 9/7![American Airlines logo]()
$413
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:00 pm -
2 stops14h 09m
Tue 10/139:35 am -
2 stops12h 50m
Deal found 9/7![Delta logo]()
$443
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:35 pm -
1 stop6h 21m
Sat 10/1012:42 pm -
1 stop8h 48m
Deal found 9/8![Delta logo]()
$448
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/101:22 pm -
2 stops7h 37m
Wed 10/142:20 pm -
2 stops10h 31m
Deal found 9/10![United Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:16 pm -
1 stop7h 07m
Fri 10/235:30 am -
1 stop7h 36m
Deal found 9/10![Delta logo]()
$394
This American Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:34 pm -
2 stops10h 33m
Sun 10/257:14 am -
1 stop6h 39m
Deal found 9/8![American Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:15 pm -
1 stop7h 56m
Sun 10/255:30 am -
1 stop7h 36m
Deal found 9/9![Delta logo]()
$449
One-way flights from Ontario to MilwaukeeSearch for one-way flight options from Ontario to Milwaukee. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Ontario to Milwaukee. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:15 am -
2 stops25h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$146
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:20 am -
1 stop7h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$189
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 pm -
2 stops13h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$194
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:00 pm -
1 stop5h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Southwest logo]()
$202
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:07 am -
1 stop8h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Delta logo]()
$206
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:45 pm -
2 stops10h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$212
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:07 am -
1 stop8h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:00 am -
2 stops12h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$222
Find flight deals from Ontario to Milwaukee
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Milwaukee (MKE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $377 (United Airlines) |
One-way from | $146 (Kiwi.com) |
Popular in | June |
Cheapest in | November |
Average price | $544 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Milwaukee that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from Ontario to Milwaukee that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Wed 10/21
7:07 am-5:40 pm
1 stop8h 33m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$189
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Thu 11/26
12:18 pm-10:28 pm
1 stop8h 10m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$189
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Wed 9/30
6:00 pm-9:18 am
2 stops13h 18m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$194
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Thu 10/15
12:40 pm-10:50 pm
1 stop8h 10m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$225
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Fri 10/30
6:00 am-6:04 pm
2 stops10h 04m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$230
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Mon 11/2
7:13 pm-7:48 am
2 stops10h 35m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$244
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Thu 11/26
5:00 am-2:58 pm
2 stops7h 58m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$280
Quickest round-trip
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Wed 9/16
1:04 pm-9:11 pm
1 stop6h 07m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$294
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Tue 9/15
1:04 pm-9:11 pm
1 stop6h 07m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$294
OntarioMilwaukee
ONT Ontario - MKE Milwaukee-Mitchell
ONTMKE
Ontario
Sat 9/19
7:05 am-9:09 pm
2 stops12h 04m
Milwaukee-Mitchell
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$299
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Ontario to Milwaukee
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Milwaukee in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Ontario-Milwaukee flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Milwaukee flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Milwaukee flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Milwaukee flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Milwaukee flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Milwaukee
Have a flexible travel schedule? Discover the best time to fly to Milwaukee from Ontario with our price prediction graph.
ONT-MKE
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Milwaukee
What is the cheapest month to book a flight from Ontario to Milwaukee?
Currently, November is the cheapest month in which you can book a flight from Ontario to Milwaukee (average of $378). Flying from Ontario to Milwaukee in June is currently the most expensive (average of $596). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Ontario to Milwaukee?
Airfare is below average for this route at the moment.
Ontario to Milwaukee flights typically cost between $412 and $582 in September.The cheapest round-trip price found within the last 5 days was $377 on American Airlines (Sep 30-Oct 3).
Reviews of airlines servicing Milwaukee
Get insights into the airlines that provide service to Milwaukee. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Milwaukee. Reviews last updated September 10, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican Airlines from Ontario to Milwaukee. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Milwaukee. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Milwaukee?
Book flights to Milwaukee if you plan to visit one of these locationsPort Washington
Sheboygan
New Berlin
Oak Creek
Wauwatosa
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Ontario to Milwaukee
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Complete your trip
Complete your trip to Milwaukee by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Milwaukee by cabin class
Find flights from Ontario to Milwaukee, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Milwaukee
Explore flights to Milwaukee departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Ontario and Milwaukee flights
Browse other Ontario and Milwaukee flight options. Last updated on September 10, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Milwaukee
Discover the top 3 airlines that operate flights from Ontario to Milwaukee. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$472 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$354 | Average$496 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$366 | Average$448 | FlexibilityNo cancel fee | On-time71% |