$216+ Cheap flights from Milwaukee (MKE) to Ontario
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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — YYZ
Jun 27 — Jul 41
Round-trip
1 adult, Economy
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Find cheap flights from Milwaukee to Ontario with Cheapflights
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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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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 May 28, 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 May 28, 2026.
This American Airlines deal was found by Cheapflights users on 5/26. 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.
Sat 6/2010:00 am
MKE
- YYZ
1 stop12h 23m
American Airlines
Wed 6/247:25 am
YYZ
- MKE
1 stop11h 55m
American Airlines
Deal found 5/26![American Airlines logo]()
$472
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1610:00 am
MKE
- YYZ
1 stop12h 29m
American Airlines
Tue 6/301:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/25![American Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 5/26. 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 8/255:00 am
MKE
- YYZ
1 stop12h 30m
American Airlines
Tue 9/87:15 pm
YYZ
- MKE
1 stop13h 46m
American Airlines
Deal found 5/26![American Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 8/810:53 am
MKE
- YOW
1 stop4h 45m
United Airlines
Wed 8/126:05 am
YOW
- MKE
1 stop5h 24m
United Airlines
Deal found 5/27![United Airlines logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 5/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:10 pm
MKE
- YYZ
1 stop26h 25m
Multiple Airlines
Mon 9/287:45 am
YYZ
- MKE
1 stop12h 30m
Multiple Airlines
Deal found 5/25![Multiple Airlines logo]()
$508
This American Airlines deal was found by Cheapflights users on 5/28. 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.
Thu 9/2411:37 am
MKE
- YYZ
1 stop10h 49m
American Airlines
Mon 9/287:15 pm
YYZ
- MKE
1 stop13h 46m
American Airlines
Deal found 5/28![American Airlines logo]()
$513
This American Airlines deal was found by Cheapflights users on 5/23. 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 7/15:00 am
MKE
- YYZ
1 stop8h 33m
American Airlines
Sat 7/47:20 am
YYZ
- MKE
1 stop12h 08m
American Airlines
Deal found 5/23![American Airlines logo]()
$521
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:03 am
MKE
- YYZ
1 stop8h 29m
American Airlines
Sat 9/266:30 am
YYZ
- MKE
1 stop7h 18m
American Airlines
Deal found 5/25![American Airlines logo]()
$523
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:02 am
MKE
- YYZ
1 stop11h 37m
American Airlines
Sun 7/263:14 pm
YYZ
- MKE
1 stop8h 09m
American Airlines
Deal found 5/27![American Airlines logo]()
$532
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:01 am
MKE
- YYZ
1 stop9h 31m
American Airlines
Fri 11/274:44 pm
YYZ
- MKE
1 stop7h 21m
American Airlines
Deal found 5/25![American Airlines logo]()
$538
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2210:00 am
MKE
- YYZ
1 stop12h 23m
American Airlines
Mon 6/291:15 pm
YYZ
- MKE
1 stop10h 09m
American Airlines
Deal found 5/25![American Airlines logo]()
$548
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:50 pm
MKE
- YYZ
1 stop15h 08m
American Airlines
Thu 6/111:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/25![American Airlines logo]()
$549
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 May 28, 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 May 28, 2026.
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 8/86:14 am
MKE
- YOW
1 stop9h 24m
United Airlines
Wed 8/126:00 am
YOW
- MKE
3 stops10h 12m
United Airlines
Deal found 5/27![United Airlines logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 5/26. 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 8/188:43 am
MKE
- YYZ
1 stop10h 22m
Multiple Airlines
Wed 8/267:45 am
YYZ
- MKE
1 stop25h 13m
Multiple Airlines
Deal found 5/26![Multiple Airlines logo]()
$602
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:25 am
MKE
- YYZ
1 stop14h 58m
American Airlines
Thu 7/161:17 pm
YYZ
- MKE
1 stop8h 14m
American Airlines
Deal found 5/27![American Airlines logo]()
$608
This Delta deal was found by Cheapflights users on 5/25. 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.
Sun 8/164:55 pm
MKE
- YUL
1 stop5h 35m
Delta
Fri 8/289:30 am
YUL
- MKE
1 stop14h 00m
Delta
Deal found 5/25![Delta logo]()
$678
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 6/233:12 pm
MKE
- YOW
1 stop5h 23m
United Airlines
Tue 6/305:50 pm
YOW
- MKE
1 stop6h 44m
United Airlines
Deal found 5/24![United Airlines logo]()
$585
This American Airlines deal was found by Cheapflights users on 5/23. 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 9/15:00 am
MKE
- YUL
1 stop10h 54m
American Airlines
Tue 9/157:55 am
YUL
- MKE
2 stops10h 38m
American Airlines
Deal found 5/23![American Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Fri 6/266:09 am
MKE
- YOW
1 stop14h 56m
United Airlines
Fri 7/33:10 pm
YOW
- MKE
1 stop9h 24m
United Airlines
Deal found 5/27![United Airlines logo]()
$603
This Kiwi.com deal was found by Cheapflights users on 5/23. 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 7/112:08 pm
MKE
- YYZ
2 stops27h 37m
Multiple Airlines
Sat 7/44:50 pm
YYZ
- MKE
1 stop16h 08m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$682
This Delta deal was found by Cheapflights users on 5/27. 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 9/37:11 am
MKE
- YYZ
1 stop3h 08m
Delta
Mon 9/76:00 am
YYZ
- MKE
1 stop4h 59m
Delta
Deal found 5/27![Delta logo]()
$686
This American Airlines deal was found by Cheapflights users on 5/28. 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 9/298:14 pm
MKE
- YUL
1 stop14h 30m
American Airlines
Sun 10/45:34 pm
YUL
- MKE
1 stop18h 12m
American Airlines
Deal found 5/28![American Airlines logo]()
$652
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 7/116:20 am
MKE
- YOW
2 stops9h 18m
United Airlines
Sat 7/185:50 pm
YOW
- MKE
1 stop6h 44m
United Airlines
Deal found 5/27![United Airlines logo]()
$614
This Delta deal was found by Cheapflights users on 5/26. 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 7/212:07 pm
MKE
- YYZ
1 stop5h 27m
Delta
Sun 7/59:45 am
YYZ
- MKE
1 stop3h 50m
Delta
Deal found 5/26![Delta logo]()
$686
This United Airlines deal was found by Cheapflights users on 5/25. 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.
Mon 6/223:12 pm
MKE
- YOW
1 stop5h 23m
United Airlines
Mon 6/296:05 am
YOW
- MKE
1 stop5h 06m
United Airlines
Deal found 5/25![United Airlines logo]()
$643
This United Airlines deal was found by Cheapflights users on 5/24. 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 7/113:11 pm
MKE
- YUL
1 stop5h 15m
United Airlines
Fri 7/173:25 pm
YUL
- MKE
1 stop9h 09m
United Airlines
Deal found 5/24![United Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 5/23. 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 6/246:09 am
MKE
- YUL
1 stop14h 57m
United Airlines
Sat 7/49:45 am
YUL
- MKE
1 stop10h 03m
United Airlines
Deal found 5/23![United Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 5/25. 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.
Wed 6/2410:52 am
MKE
- YUL
1 stop10h 14m
United Airlines
Wed 7/111:23 am
YUL
- MKE
1 stop13h 11m
United Airlines
Deal found 5/25![United Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 5/26. 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 9/311:18 am
MKE
- YYZ
1 stop8h 26m
United Airlines
Mon 9/79:00 pm
YYZ
- MKE
1 stop14h 00m
United Airlines
Deal found 5/26![United Airlines logo]()
$664
This United Airlines deal was found by Cheapflights users on 5/24. 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 6/279:20 am
MKE
- YUL
2 stops9h 25m
United Airlines
Sat 7/46:00 am
YUL
- MKE
2 stops7h 48m
United Airlines
Deal found 5/24![United Airlines logo]()
$665
This United Airlines deal was found by Cheapflights users on 5/23. 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 7/27:50 am
MKE
- YUL
2 stops10h 55m
United Airlines
Fri 7/103:25 pm
YUL
- MKE
2 stops8h 04m
United Airlines
Deal found 5/23![United Airlines logo]()
$665
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 10/318:29 am
MKE
- YYZ
1 stop7h 10m
United Airlines
Wed 11/47:00 am
YYZ
- MKE
1 stop9h 04m
United Airlines
Deal found 5/27![United Airlines logo]()
$669
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 8/181:19 pm
MKE
- YYZ
1 stop9h 06m
United Airlines
Wed 8/199:00 pm
YYZ
- MKE
1 stop11h 07m
United Airlines
Deal found 5/24![United Airlines logo]()
$676
This United Airlines deal was found by Cheapflights users on 5/24. 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 8/83:11 pm
MKE
- YYZ
1 stop7h 14m
United Airlines
Fri 8/149:00 pm
YYZ
- MKE
1 stop14h 00m
United Airlines
Deal found 5/24![United Airlines logo]()
$687
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 10/318:29 am
MKE
- YXU
2 stops12h 17m
United Airlines
Wed 11/45:45 am
YXU
- MKE
2 stops10h 19m
United Airlines
Deal found 5/27![United Airlines logo]()
$989
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 7/116:20 am
MKE
- YXU
2 stops14h 20m
United Airlines
Sat 7/1810:05 am
YXU
- MKE
2 stops11h 51m
United Airlines
Deal found 5/27![United Airlines logo]()
$998
Last-minute flights from Milwaukee to OntarioDiscover last-minute flight deals from Milwaukee to Ontario. Data last updated May 28, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Ontario. Data last updated May 28, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:50 pm
MKE
- YYZ
1 stop15h 08m
American Airlines
Thu 6/111:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/25![American Airlines logo]()
$549
This Justfly.com deal was found by Cheapflights users on 5/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/99:57 am
MKE
- YUL
1 stop12h 45m
WestJet
Thu 7/236:00 am
YUL
- MKE
1 stop7h 39m
WestJet
Deal found 5/26![WestJet logo]()
$639
This American Airlines deal was found by Cheapflights users on 5/26. 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 6/118:00 am
MKE
- YYZ
1 stop8h 44m
American Airlines
Mon 6/151:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/26![American Airlines logo]()
$618
This Kiwi.com deal was found by Cheapflights users on 5/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1212:08 pm
MKE
- YYZ
2 stops27h 37m
Multiple Airlines
Mon 6/157:45 am
YYZ
- MKE
1 stop25h 13m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$566
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1510:00 am
MKE
- YYZ
1 stop12h 29m
American Airlines
Thu 6/181:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/25![American Airlines logo]()
$564
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1610:00 am
MKE
- YYZ
1 stop12h 29m
American Airlines
Tue 6/301:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/25![American Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 5/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1912:08 pm
MKE
- YYZ
2 stops27h 37m
Multiple Airlines
Wed 7/157:45 am
YYZ
- MKE
1 stop25h 13m
Multiple Airlines
Deal found 5/25![Multiple Airlines logo]()
$622
This American Airlines deal was found by Cheapflights users on 5/26. 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.
Sat 6/2010:00 am
MKE
- YYZ
1 stop12h 23m
American Airlines
Wed 6/247:25 am
YYZ
- MKE
1 stop11h 55m
American Airlines
Deal found 5/26![American Airlines logo]()
$472
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2210:00 am
MKE
- YYZ
1 stop12h 23m
American Airlines
Mon 6/291:15 pm
YYZ
- MKE
1 stop10h 09m
American Airlines
Deal found 5/25![American Airlines logo]()
$548
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/221:28 pm
MKE
- YYZ
1 stop8h 55m
American Airlines
Fri 6/261:15 pm
YYZ
- MKE
1 stop8h 50m
American Airlines
Deal found 5/27![American Airlines logo]()
$588
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 6/233:12 pm
MKE
- YOW
1 stop5h 23m
United Airlines
Tue 6/305:50 pm
YOW
- MKE
1 stop6h 44m
United Airlines
Deal found 5/24![United Airlines logo]()
$585
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Fri 6/266:09 am
MKE
- YOW
1 stop14h 56m
United Airlines
Fri 7/33:10 pm
YOW
- MKE
1 stop9h 24m
United Airlines
Deal found 5/27![United Airlines logo]()
$603
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 May 28, 2026.
Search for one-way flight options from Milwaukee to Ontario. Find affordable one-way fares based on user searches. Data last updated May 28, 2026.
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/208:00 am
MKE
- YYZ
1 stop14h 23m
American Airlines
Deal found 5/27![American Airlines logo]()
$216
This American Airlines deal was found by Cheapflights users on 5/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:02 am
MKE
- YYZ
1 stop8h 32m
American Airlines
Deal found 5/25![American Airlines logo]()
$217
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/118:20 am
MKE
- YYZ
1 stop14h 09m
American Airlines
Deal found 5/27![American Airlines logo]()
$218
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:30 am
MKE
- YYZ
1 stop10h 05m
American Airlines
Deal found 5/27![American Airlines logo]()
$232
This American Airlines deal was found by Cheapflights users on 5/26. 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 6/1610:00 am
MKE
- YYZ
1 stop12h 29m
American Airlines
Deal found 5/26![American Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 5/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/188:53 am
MKE
- YYZ
2 stops31h 16m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 5/26. 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 8/48:43 am
MKE
- YYZ
1 stop31h 02m
Multiple Airlines
Deal found 5/26![Multiple Airlines logo]()
$257
This American Airlines deal was found by Cheapflights users on 5/26. 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.
Fri 7/106:55 pm
MKE
- YUL
1 stop20h 59m
American Airlines
Deal found 5/26![American Airlines logo]()
$271
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sun 6/283:11 pm
MKE
- YOW
1 stop5h 24m
United Airlines
Deal found 5/27![United Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 5/26. 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.
Wed 6/1712:08 pm
MKE
- YYZ
2 stops27h 37m
Multiple Airlines
Deal found 5/26![Multiple Airlines logo]()
$274
This American Airlines deal was found by Cheapflights users on 5/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:14 pm
MKE
- YUL
1 stop14h 30m
American Airlines
Deal found 5/27![American Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 5/26. 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.
Fri 6/1212:08 pm
MKE
- YOW
2 stops25h 25m
Multiple Airlines
Deal found 5/26![Multiple Airlines logo]()
$289
Find flight deals from Milwaukee to Ontario
Keep the following information in mind while searching for Milwaukee to Ontario flight deals. Data was last updated May 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $472 (American Airlines) |
One-way from | $216 (American Airlines) |
Popular in | August |
Cheapest in | May |
Average price | $614 |
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 May 28, 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
MilwaukeeOttawa
MKE - YOW
MKEYOW
Milwaukee-Mitchell
Sat 8/8
6:14 am-4:38 pm
1 stop9h 24m
Ottawa
Wed 8/12
6:00 am-3:12 pm
3 stops10h 12m
$516
MilwaukeeOttawa
MKE - YOW
MKEYOW
Milwaukee-Mitchell
Tue 6/23
3:12 pm-9:35 pm
1 stop5h 23m
Ottawa
Tue 6/30
5:50 pm-11:34 pm
1 stop6h 44m
$585
MilwaukeeToronto
MKE - YYZ
MKEYYZ
Milwaukee-Mitchell
Tue 8/18
8:43 am-8:05 pm
1 stop10h 22m
Toronto Pearson Intl
Wed 8/26
7:45 am-7:58 am
1 stop25h 13m
$602
MilwaukeeOttawa
MKE - YOW
MKEYOW
Milwaukee-Mitchell
Fri 6/26
6:09 am-10:05 pm
1 stop14h 56m
Ottawa
Fri 7/3
3:10 pm-11:34 pm
1 stop9h 24m
$603
MilwaukeeToronto
MKE - YYZ
MKEYYZ
Milwaukee-Mitchell
Mon 7/13
7:25 am-11:23 pm
1 stop14h 58m
Toronto Pearson Intl
Thu 7/16
1:17 pm-8:31 pm
1 stop8h 14m
$608
MilwaukeeOttawa
MKE - YOW
MKEYOW
Milwaukee-Mitchell
Sat 7/11
6:20 am-4:38 pm
2 stops9h 18m
Ottawa
Sat 7/18
5:50 pm-11:34 pm
1 stop6h 44m
$614
MilwaukeeMontreal
MKE - YUL
MKEYUL
Milwaukee-Mitchell
Tue 9/1
5:00 am-4:54 pm
1 stop10h 54m
Montreal Pierre Elliott Trudeau Intl
Tue 9/15
7:55 am-5:33 pm
2 stops10h 38m
$624
MilwaukeeOttawa
MKE - YOW
MKEYOW
Milwaukee-Mitchell
Mon 6/22
3:12 pm-9:35 pm
1 stop5h 23m
Ottawa
Mon 6/29
6:05 am-10:11 am
1 stop5h 06m
$643
MilwaukeeMontreal
MKE - YUL
MKEYUL
Milwaukee-Mitchell
Sat 7/11
3:11 pm-9:26 pm
1 stop5h 15m
Montreal Pierre Elliott Trudeau Intl
Fri 7/17
3:25 pm-11:34 pm
1 stop9h 09m
$650
MilwaukeeMontreal
MKE - YUL
MKEYUL
Milwaukee-Mitchell
Wed 6/24
6:09 am-10:06 pm
1 stop14h 57m
Montreal Pierre Elliott Trudeau Intl
Sat 7/4
9:45 am-6:48 pm
1 stop10h 03m
$650
Showing 1-10 of 49 resultsSorted by cheapest first
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-YYZ
MKE-YOW
MKE-YUL
MKE-YXU
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
MKE-CAON
MKE-YYZ
MKE-YOW
MKE-YUL
MKE-YXU
What is the cheapest month to book a flight from Milwaukee to Region of Ontario?
Currently, September is the cheapest month in which you can book a flight from Milwaukee to Region of Ontario (average of $221). Flying from Milwaukee to Region of Ontario in December is currently the most expensive (average of $1,095). 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 Region of 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 May 28, 2026.
See what other customers who have flown with Delta,United Airlines, andWestJet from Milwaukee to Ontario have to say. 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
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
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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.
Milwaukee and Ontario flights
Browse other Milwaukee and Ontario flight options. Last updated on May 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Milwaukee to Ontario flights
Consider these flights traveling from Milwaukee to Ontario.
Top airline flying from Milwaukee to Ontario
Discover the top airline 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 May 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$362 | Average$572 | FlexibilityNo cancel fee | On-time69% |