$162+ Cheap flights from Milwaukee to Ontario (MKE - ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from Milwaukee to Ontario with Cheapflights
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Cheapest flights from Milwaukee to OntarioExplore the most affordable flight options available from Milwaukee to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
Explore the most affordable flight options available from Milwaukee to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
This American Airlines deal was found by Cheapflights users on 7/26. 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 9/97:00 am
MKE
- ONT
1 stop6h 47m
American Airlines
Wed 9/1612:37 pm
ONT
- MKE
1 stop7h 11m
American Airlines
Deal found 7/26![American Airlines logo]()
$322
This Southwest deal was found by Cheapflights users on 7/29. 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.
Tue 9/111:40 am
MKE
- ONT
1 stop6h 25m
Southwest
Mon 9/75:15 am
ONT
- MKE
1 stop5h 55m
Southwest
Deal found 7/29![Southwest logo]()
$323
This Delta deal was found by Cheapflights users on 7/29. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Sat 8/2912:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/29![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 7/24. 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 12/23:55 pm
MKE
- ONT
1 stop8h 19m
Delta
Tue 12/81:00 pm
ONT
- MKE
1 stop6h 25m
Delta
Deal found 7/24![Delta logo]()
$333
This Southwest deal was found by Cheapflights users on 7/29. 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 9/26:20 am
MKE
- ONT
2 stops8h 20m
Southwest
Sun 9/612:05 pm
ONT
- MKE
2 stops7h 50m
Southwest
Deal found 7/29![Southwest logo]()
$338
This Delta deal was found by Cheapflights users on 7/27. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Wed 8/2612:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/27![Delta logo]()
$346
This Delta deal was found by Cheapflights users on 7/24. 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 12/35:45 am
MKE
- ONT
1 stop7h 42m
Delta
Thu 12/310:59 pm
ONT
- MKE
1 stop8h 23m
Delta
Deal found 7/24![Delta logo]()
$356
This Southwest deal was found by Cheapflights users on 7/28. 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 9/93:40 pm
MKE
- ONT
2 stops7h 20m
Southwest
Wed 9/169:40 am
ONT
- MKE
2 stops8h 20m
Southwest
Deal found 7/28![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 7/26. 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 10/155:45 am
MKE
- ONT
2 stops9h 30m
Southwest
Tue 10/201:35 pm
ONT
- MKE
2 stops8h 20m
Southwest
Deal found 7/26![Southwest logo]()
$366
This Delta deal was found by Cheapflights users on 7/29. 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 10/77:05 am
MKE
- ONT
1 stop7h 16m
Delta
Fri 10/911:15 pm
ONT
- MKE
1 stop7h 56m
Delta
Deal found 7/29![Delta logo]()
$370
Best flights from Milwaukee to OntarioDiscover carefully curated flight deals from Milwaukee to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
Discover carefully curated flight deals from Milwaukee to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
This Delta deal was found by Cheapflights users on 7/29. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Sat 8/2912:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/29![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 7/29. 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 9/23:40 pm
MKE
- ONT
1 stop5h 55m
Southwest
Sun 9/67:05 am
ONT
- MKE
1 stop5h 40m
Southwest
Deal found 7/29![Southwest logo]()
$328
This United Airlines deal was found by Cheapflights users on 7/24. 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 9/263:51 pm
MKE
- ONT
1 stop8h 58m
United Airlines
Tue 9/295:00 am
ONT
- MKE
1 stop6h 31m
United Airlines
Deal found 7/24![United Airlines logo]()
$423
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 12/75:00 am
MKE
- ONT
2 stops11h 47m
Alaska Airlines
Tue 12/86:00 am
ONT
- MKE
2 stops11h 58m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$433
This Southwest deal was found by Cheapflights users on 7/29. 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.
Tue 9/13:10 pm
MKE
- ONT
2 stops7h 45m
Southwest
Mon 9/75:15 am
ONT
- MKE
1 stop5h 55m
Southwest
Deal found 7/29![Southwest logo]()
$328
This Delta deal was found by Cheapflights users on 7/27. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Wed 8/2612:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/27![Delta logo]()
$346
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Mon 12/73:00 pm
MKE
- ONT
1 stop7h 20m
United Airlines
Tue 12/85:00 am
ONT
- MKE
1 stop6h 23m
United Airlines
Deal found 7/26![United Airlines logo]()
$423
This Southwest deal was found by Cheapflights users on 7/24. 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 10/216:30 am
MKE
- ONT
1 stop6h 15m
Southwest
Sun 10/255:10 pm
ONT
- MKE
1 stop5h 10m
Southwest
Deal found 7/24![Southwest logo]()
$400
This Delta deal was found by Cheapflights users on 7/28. 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 9/27:30 am
MKE
- ONT
1 stop6h 46m
Delta
Mon 9/710:00 pm
ONT
- MKE
1 stop9h 06m
Delta
Deal found 7/28![Delta logo]()
$431
This Southwest deal was found by Cheapflights users on 7/24. 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 11/265:00 am
MKE
- ONT
1 stop8h 10m
Southwest
Mon 11/301:05 pm
ONT
- MKE
1 stop5h 50m
Southwest
Deal found 7/24![Southwest logo]()
$430
This Delta deal was found by Cheapflights users on 7/28. 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 10/152:59 pm
MKE
- ONT
1 stop8h 55m
Delta
Mon 10/1911:15 pm
ONT
- MKE
1 stop7h 56m
Delta
Deal found 7/28![Delta logo]()
$461
This Southwest deal was found by Cheapflights users on 7/24. 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 11/256:00 am
MKE
- ONT
1 stop8h 30m
Southwest
Mon 11/305:30 am
ONT
- MKE
1 stop6h 40m
Southwest
Deal found 7/24![Southwest logo]()
$470
Last-minute flights from Milwaukee to OntarioDiscover last-minute flight deals from Milwaukee to Ontario. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Ontario. Data last updated July 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/25. 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 8/115:34 am
MKE
- ONT
1 stop7h 08m
Delta
Sat 8/157:05 am
ONT
- MKE
1 stop7h 09m
Delta
Deal found 7/25![Delta logo]()
$455
This Southwest deal was found by Cheapflights users on 7/29. 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.
Tue 8/112:05 pm
MKE
- ONT
1 stop6h 50m
Southwest
Tue 8/185:45 am
ONT
- MKE
1 stop5h 40m
Southwest
Deal found 7/29![Southwest logo]()
$468
This United Airlines deal was found by Cheapflights users on 7/25. 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 8/1110:19 am
MKE
- ONT
2 stops9h 52m
United Airlines
Sat 8/155:00 am
ONT
- MKE
1 stop6h 29m
United Airlines
Deal found 7/25![United Airlines logo]()
$470
This Delta deal was found by Cheapflights users on 7/26. 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 8/133:01 pm
MKE
- ONT
1 stop8h 51m
Delta
Mon 8/1712:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/26![Delta logo]()
$465
This KAYAK deal was found by Cheapflights users on 7/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:17 pm
MKE
- ONT
1 stop7h 35m
Delta
Thu 8/2010:00 pm
ONT
- MKE
1 stop9h 16m
Delta
Deal found 7/25![Delta logo]()
$476
This Delta deal was found by Cheapflights users on 7/29. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Sat 8/2912:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/29![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 7/27. 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 8/205:34 am
MKE
- ONT
1 stop7h 08m
Delta
Wed 8/2612:00 pm
ONT
- MKE
1 stop9h 53m
Delta
Deal found 7/27![Delta logo]()
$346
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/252:35 pm
MKE
- ONT
1 stop8h 18m
United Airlines
Sat 8/295:00 am
ONT
- MKE
1 stop6h 29m
United Airlines
Deal found 7/28![United Airlines logo]()
$423
One-way flights from Milwaukee to OntarioSearch for one-way flight options from Milwaukee to Ontario. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
Search for one-way flight options from Milwaukee to Ontario. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/25. 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.
Mon 10/195:45 am
MKE
- ONT
1 stop6h 35m
Southwest
Deal found 7/25![Southwest logo]()
$162
This Southwest deal was found by Cheapflights users on 7/29. 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 10/2812:35 pm
MKE
- ONT
2 stops9h 00m
Southwest
Deal found 7/29![Southwest logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Tue 9/812:10 pm
MKE
- ONT
2 stops24h 20m
Frontier
Deal found 7/27![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Tue 8/1812:10 pm
MKE
- ONT
2 stops37h 40m
Frontier
Deal found 7/26![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Sun 8/3012:10 pm
MKE
- ONT
2 stops23h 54m
Frontier
Deal found 7/28![Frontier logo]()
$183
This Southwest deal was found by Cheapflights users on 7/27. 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.
Tue 9/85:20 pm
MKE
- ONT
1 stop5h 40m
Southwest
Deal found 7/27![Southwest logo]()
$190
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:02 am
MKE
- ONT
1 stop9h 07m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Sun 8/168:43 am
MKE
- ONT
2 stops41h 07m
Frontier
Deal found 7/27![Frontier logo]()
$203
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Mon 9/282:39 pm
MKE
- ONT
1 stop8h 19m
United Airlines
Deal found 7/26![United Airlines logo]()
$212
This Southwest deal was found by Cheapflights users on 7/26. 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.
Mon 9/75:45 am
MKE
- ONT
1 stop12h 25m
Southwest
Deal found 7/26![Southwest logo]()
$214
Find flight deals from Milwaukee to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to Ontario (ONT). 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 July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $322 (American Airlines) |
One-way from | $162 (Southwest) |
Popular in | February |
Cheapest in | September |
Average price | $487 |
Cheapflights Fare Finder
Customize your flight search to find flights from Milwaukee to Ontario 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 2,558,603 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Milwaukee to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Thu 8/20
5:34 am-10:42 am
1 stop7h 08m
Ontario
Sat 8/29
12:00 pm-11:53 pm
1 stop9h 53m
$324
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Wed 9/2
3:40 pm-7:35 pm
1 stop5h 55m
Ontario
Sun 9/6
7:05 am-2:45 pm
1 stop5h 40m
$328
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Tue 9/1
3:10 pm-8:55 pm
2 stops7h 45m
Ontario
Mon 9/7
5:15 am-1:10 pm
1 stop5h 55m
$328
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Thu 8/20
5:34 am-10:42 am
1 stop7h 08m
Ontario
Wed 8/26
12:00 pm-11:53 pm
1 stop9h 53m
$346
Quickest round-trip
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Wed 10/21
6:30 am-10:45 am
1 stop6h 15m
Ontario
Sun 10/25
5:10 pm-12:20 am
1 stop5h 10m
$400
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Sat 9/26
3:51 pm-10:49 pm
1 stop8h 58m
Ontario
Tue 9/29
5:00 am-1:31 pm
1 stop6h 31m
$423
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Mon 12/7
3:00 pm-8:20 pm
1 stop7h 20m
Ontario
Tue 12/8
5:00 am-1:23 pm
1 stop6h 23m
$423
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Thu 11/26
5:00 am-11:10 am
1 stop8h 10m
Ontario
Mon 11/30
1:05 pm-8:55 pm
1 stop5h 50m
$430
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Wed 9/2
7:30 am-12:16 pm
1 stop6h 46m
Ontario
Mon 9/7
10:00 pm-9:06 am
1 stop9h 06m
$431
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Mon 12/7
5:00 am-2:47 pm
2 stops11h 47m
Ontario
Tue 12/8
6:00 am-7:58 pm
2 stops11h 58m
$433
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Milwaukee to Ontario
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 Milwaukee to Ontario in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Milwaukee-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Milwaukee-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Milwaukee-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Milwaukee-Ontario 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 Milwaukee-Ontario 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 Milwaukee to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Milwaukee with our price prediction graph.
MKE-ONT
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 Milwaukee to Ontario
What is the cheapest month to book a flight from Milwaukee to Ontario?
Currently, September is the cheapest month in which you can book a flight from Milwaukee to Ontario (average of $327). Flying from Milwaukee to Ontario in February is currently the most expensive (average of $625). 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 Milwaukee to Ontario?
Airfare is below average for this route at the moment.
Milwaukee to Ontario flights typically cost between $356 and $437 in September.The cheapest round-trip price found within the last 5 days was $322 on American Airlines (Sep 9-Sep 16).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 29, 2026.
Read through reviews of airlines operating flights from Milwaukee to Ontario, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
8.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Milwaukee to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Find flights from Milwaukee to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
Milwaukee and Ontario flights
Browse other Milwaukee and Ontario flight options. Last updated on July 29, 2026.
Other flights from Milwaukee
Browse through other flights departing from Milwaukee. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Milwaukee to Ontario
Discover the top 3 airlines that operate flights from Milwaukee to Ontario. 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 2,558,603 searches. Data last updated July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$306 | Average$432 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$334 | Average$483 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$356 | Average$401 | FlexibilityNo cancel fee | On-time71% |