$194+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
May 29 — Jun 51
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 April 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 April 29, 2026.
This Southwest deal was found by Cheapflights users on 4/28. 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 6/102:40 pm
MKE
- ONT
1 stop6h 20m
Southwest
Tue 6/164:10 pm
ONT
- MKE
1 stop6h 45m
Southwest
Deal found 4/28![Southwest logo]()
$387
This Delta deal was found by Cheapflights users on 4/26. 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 5/2112:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Tue 5/261:29 pm
ONT
- MKE
1 stop6h 04m
Delta
Deal found 4/26![Delta logo]()
$393
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 5/235:29 pm
MKE
- ONT
1 stop7h 22m
United Airlines
Sat 5/306:30 am
ONT
- MKE
1 stop7h 16m
United Airlines
Deal found 4/25![United Airlines logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
MKE
- ONT
1 stop10h 09m
Alaska Airlines
Sat 5/306:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 4/28. 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 5/2112:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Mon 5/2510:00 pm
ONT
- MKE
1 stop9h 08m
Delta
Deal found 4/28![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 4/24. 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.
Mon 5/185:15 am
MKE
- ONT
1 stop7h 40m
Southwest
Thu 5/2112:40 pm
ONT
- MKE
1 stop10h 25m
Southwest
Deal found 4/24![Southwest logo]()
$404
This American Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 6/21:30 pm
MKE
- ONT
2 stops10h 27m
American Airlines
Tue 6/2311:59 pm
ONT
- MKE
1 stop9h 16m
American Airlines
Deal found 4/26![American Airlines logo]()
$411
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
MKE
- ONT
1 stop10h 09m
Alaska Airlines
Wed 5/206:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:40 pm
MKE
- ONT
1 stop9h 18m
Alaska Airlines
Sat 5/306:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$418
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:40 pm
MKE
- ONT
1 stop9h 18m
Alaska Airlines
Sat 6/66:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$423
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 April 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 April 29, 2026.
This Delta deal was found by Cheapflights users on 4/26. 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.
Tue 6/26:45 am
MKE
- ONT
1 stop7h 34m
Delta
Tue 6/231:00 pm
ONT
- MKE
1 stop6h 46m
Delta
Deal found 4/26![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 4/27. 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.
Wed 6/105:00 am
MKE
- ONT
1 stop6h 35m
Southwest
Tue 6/164:35 pm
ONT
- MKE
1 stop5h 20m
Southwest
Deal found 4/27![Southwest logo]()
$387
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 6/92:35 pm
MKE
- ONT
1 stop8h 07m
United Airlines
Wed 7/225:00 am
ONT
- MKE
1 stop6h 25m
United Airlines
Deal found 4/26![United Airlines logo]()
$532
This Southwest deal was found by Cheapflights users on 4/28. 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.
Sat 6/610:15 am
MKE
- ONT
1 stop11h 00m
Southwest
Tue 6/304:35 pm
ONT
- MKE
1 stop5h 20m
Southwest
Deal found 4/28![Southwest logo]()
$392
This Delta deal was found by Cheapflights users on 4/25. 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.
Thu 5/2112:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Mon 5/2512:07 pm
ONT
- MKE
1 stop9h 46m
Delta
Deal found 4/25![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 4/28. 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.
Sat 5/305:30 am
MKE
- ONT
2 stops8h 45m
Southwest
Wed 6/105:15 am
ONT
- MKE
2 stops6h 45m
Southwest
Deal found 4/28![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 4/25. 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 6/14:50 pm
MKE
- ONT
2 stops8h 15m
Southwest
Wed 6/311:05 am
ONT
- MKE
2 stops8h 30m
Southwest
Deal found 4/25![Southwest logo]()
$430
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Wed 6/105:29 pm
MKE
- ONT
1 stop7h 17m
United Airlines
Wed 7/226:30 am
ONT
- MKE
1 stop8h 12m
United Airlines
Deal found 4/26![United Airlines logo]()
$532
This Delta deal was found by Cheapflights users on 4/24. 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.
Fri 5/222:55 pm
MKE
- ONT
1 stop8h 53m
Delta
Wed 5/2710:00 pm
ONT
- MKE
1 stop9h 08m
Delta
Deal found 4/24![Delta logo]()
$503
This Southwest deal was found by Cheapflights users on 4/25. 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.
Wed 6/176:25 am
MKE
- ONT
2 stops8h 30m
Southwest
Wed 7/15:15 am
ONT
- MKE
2 stops6h 45m
Southwest
Deal found 4/25![Southwest logo]()
$459
This Southwest deal was found by Cheapflights users on 4/29. 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.
Fri 6/51:50 pm
MKE
- ONT
2 stops8h 20m
Southwest
Mon 6/812:45 pm
ONT
- MKE
2 stops7h 40m
Southwest
Deal found 4/29![Southwest logo]()
$478
This Southwest deal was found by Cheapflights users on 4/25. 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.
Thu 5/146:10 am
MKE
- ONT
2 stops8h 45m
Southwest
Tue 5/191:55 pm
ONT
- MKE
1 stop5h 40m
Southwest
Deal found 4/25![Southwest logo]()
$497
Last-minute flights from Milwaukee to OntarioDiscover last-minute flight deals from Milwaukee to Ontario. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Ontario. Data last updated April 29, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 4/24. 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.
Mon 5/185:15 am
MKE
- ONT
1 stop7h 40m
Southwest
Thu 5/2112:40 pm
ONT
- MKE
1 stop10h 25m
Southwest
Deal found 4/24![Southwest logo]()
$404
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
MKE
- ONT
1 stop10h 09m
Alaska Airlines
Wed 5/206:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$387
This Delta deal was found by Cheapflights users on 4/26. 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 5/2112:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Tue 5/261:29 pm
ONT
- MKE
1 stop6h 04m
Delta
Deal found 4/26![Delta logo]()
$393
This Delta deal was found by Cheapflights users on 4/28. 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 5/2112:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Mon 5/2510:00 pm
ONT
- MKE
1 stop9h 08m
Delta
Deal found 4/28![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 4/26. 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 5/218:00 am
MKE
- ONT
2 stops8h 20m
Southwest
Tue 5/263:45 pm
ONT
- MKE
1 stop5h 25m
Southwest
Deal found 4/26![Southwest logo]()
$428
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 5/235:29 pm
MKE
- ONT
1 stop7h 22m
United Airlines
Sat 5/306:30 am
ONT
- MKE
1 stop7h 16m
United Airlines
Deal found 4/25![United Airlines logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:40 pm
MKE
- ONT
1 stop9h 18m
Alaska Airlines
Sat 5/306:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$418
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
MKE
- ONT
1 stop10h 09m
Alaska Airlines
Sat 5/306:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Thu 5/285:29 pm
MKE
- ONT
1 stop7h 22m
United Airlines
Sun 5/316:30 am
ONT
- MKE
1 stop7h 16m
United Airlines
Deal found 4/26![United Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 4/28. 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.
Sat 5/3011:50 am
MKE
- ONT
1 stop8h 00m
Southwest
Wed 6/104:10 pm
ONT
- MKE
1 stop6h 45m
Southwest
Deal found 4/28![Southwest logo]()
$392
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 April 29, 2026.
Search for one-way flight options from Milwaukee to Ontario. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Delta deal was found by Cheapflights users on 4/27. 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.
Tue 5/196:45 am
MKE
- ONT
1 stop7h 34m
Delta
Deal found 4/27![Delta logo]()
$194
This Delta deal was found by Cheapflights users on 4/27. 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 5/2812:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Deal found 4/27![Delta logo]()
$200
This American Airlines deal was found by Cheapflights users on 4/26. 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.
Thu 5/285:00 am
MKE
- ONT
2 stops9h 05m
American Airlines
Deal found 4/26![American Airlines logo]()
$205
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
MKE
- ONT
1 stop10h 09m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$220
This Delta deal was found by Cheapflights users on 4/24. 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 7/302:59 pm
MKE
- ONT
1 stop8h 45m
Delta
Deal found 4/24![Delta logo]()
$239
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:16 am
MKE
- ONT
1 stop6h 48m
American Airlines
Deal found 4/28![American Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/192:38 pm
MKE
- ONT
2 stops10h 21m
United Airlines
Deal found 4/27![United Airlines logo]()
$249
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:35 pm
MKE
- ONT
2 stops10h 02m
United Airlines
Deal found 4/27![United Airlines logo]()
$255
This American Airlines deal was found by Cheapflights users on 4/26. 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.
Thu 7/305:02 am
MKE
- ONT
2 stops9h 01m
American Airlines
Deal found 4/26![American Airlines logo]()
$258
This Delta deal was found by Cheapflights users on 4/27. 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.
Fri 5/2212:43 pm
MKE
- ONT
1 stop7h 53m
Delta
Deal found 4/27![Delta logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:02 am
MKE
- ONT
1 stop9h 07m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$276
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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $387 (Southwest) |
One-way from | $194 (Delta) |
Popular in | February |
Cheapest in | January |
Average price | $371 |
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 April 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
Tue 6/2
6:45 am-12:19 pm
1 stop7h 34m
Ontario
Tue 6/23
1:00 pm-9:46 pm
1 stop6h 46m
$387
Quickest round-trip
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Wed 6/10
5:00 am-9:35 am
1 stop6h 35m
Ontario
Tue 6/16
4:35 pm-11:55 pm
1 stop5h 20m
$387
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Sat 6/6
10:15 am-7:15 pm
1 stop11h 00m
Ontario
Tue 6/30
4:35 pm-11:55 pm
1 stop5h 20m
$392
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Thu 5/21
12:43 pm-6:36 pm
1 stop7h 53m
Ontario
Mon 5/25
12:07 pm-11:53 pm
1 stop9h 46m
$399
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Sat 5/30
5:30 am-12:15 pm
2 stops8h 45m
Ontario
Wed 6/10
5:15 am-2:00 pm
2 stops6h 45m
$402
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Mon 6/1
4:50 pm-11:05 pm
2 stops8h 15m
Ontario
Wed 6/3
11:05 am-9:35 pm
2 stops8h 30m
$430
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Wed 6/17
6:25 am-12:55 pm
2 stops8h 30m
Ontario
Wed 7/1
5:15 am-2:00 pm
2 stops6h 45m
$459
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Fri 6/5
1:50 pm-8:10 pm
2 stops8h 20m
Ontario
Mon 6/8
12:45 pm-10:25 pm
2 stops7h 40m
$478
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Thu 5/14
6:10 am-12:55 pm
2 stops8h 45m
Ontario
Tue 5/19
1:55 pm-9:35 pm
1 stop5h 40m
$497
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
Fri 5/22
2:55 pm-9:48 pm
1 stop8h 53m
Ontario
Wed 5/27
10:00 pm-9:08 am
1 stop9h 08m
$503
Showing 1-10 of 24 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | 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, January is the cheapest month in which you can book a flight from Milwaukee to Ontario (average of $306). 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?
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 April 29, 2026.
Read through reviews of airlines operating flights from Milwaukee to Ontario, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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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Alternative routes for Milwaukee to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Milwaukee to Ontario by cabin class
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 April 29, 2026.
Milwaukee and Ontario flights
Browse other Milwaukee and Ontario flight options. Last updated on April 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 April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Milwaukee to Ontario
Discover the top 4 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$300 | Average$407 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$316 | Average$456 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$324 | Average$377 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$344 | Average$434 | FlexibilityNo cancel fee | On-time69% |