$105+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — ONT
abr. 14 — abr. 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Milwaukee to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Milwaukee to Ontario
Cheapest
Best
Last-minute
One-way
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 marzo 15, 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 marzo 15, 2026.
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/205:05 pm
MKE
- ONT
1 stop8h 50m
Frontier
dom. 4/2612:59 am
ONT
- MKE
1 stop13h 11m
Frontier
Deal found 3/12![Frontier logo]()
$210
This CheapOair deal was found by Cheapflights users on 3/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/261:57 pm
MKE
- ONT
1 stop27h 40m
Frontier
mié. 4/110:03 pm
ONT
- MKE
1 stop11h 59m
Frontier
Deal found 3/11![Frontier logo]()
$281
This Southwest deal was found by Cheapflights users on 3/14. 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.
mié. 4/155:45 pm
MKE
- ONT
1 stop5h 45m
Southwest
sáb. 4/256:20 am
ONT
- MKE
1 stop8h 30m
Southwest
Deal found 3/14![Southwest logo]()
$317
This Gotogate deal was found by Cheapflights users on 3/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/261:57 pm
MKE
- ONT
1 stop27h 40m
Frontier
lun. 3/309:49 pm
ONT
- MKE
1 stop13h 13m
Frontier
Deal found 3/11![Frontier logo]()
$319
This Southwest deal was found by Cheapflights users on 3/12. 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.
jue. 5/72:15 pm
MKE
- ONT
1 stop8h 30m
Southwest
mié. 5/133:45 pm
ONT
- MKE
1 stop5h 25m
Southwest
Deal found 3/12![Southwest logo]()
$325
This American Airlines deal was found by Cheapflights users on 3/12. 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.
mié. 4/1511:49 am
MKE
- ONT
2 stops8h 41m
American Airlines
sáb. 4/256:15 am
ONT
- MKE
2 stops10h 34m
American Airlines
Deal found 3/12![American Airlines logo]()
$327
This American Airlines deal was found by Cheapflights users on 3/14. 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.
sáb. 5/1612:00 pm
MKE
- ONT
1 stop11h 07m
American Airlines
mié. 5/206:15 am
ONT
- MKE
1 stop6h 00m
American Airlines
Deal found 3/14![American Airlines logo]()
$330
This Southwest deal was found by Cheapflights users on 3/13. 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.
sáb. 5/165:05 pm
MKE
- ONT
1 stop5h 40m
Southwest
mié. 5/2011:55 pm
ONT
- MKE
1 stop9h 00m
Southwest
Deal found 3/13![Southwest logo]()
$332
This United Airlines deal was found by Cheapflights users on 3/12. 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.
jue. 5/75:56 pm
MKE
- ONT
1 stop6h 39m
United Airlines
mar. 5/125:00 am
ONT
- MKE
1 stop6h 32m
United Airlines
Deal found 3/12![United Airlines logo]()
$337
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 marzo 15, 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 marzo 15, 2026.
This Delta deal was found by Cheapflights users on 3/14. 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.
jue. 5/76:45 am
MKE
- ONT
1 stop7h 34m
Delta
mié. 5/131:29 pm
ONT
- MKE
1 stop6h 04m
Delta
Deal found 3/14![Delta logo]()
$345
This Alaska Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/57:00 am
MKE
- ONT
1 stop9h 32m
Alaska Airlines
vie. 5/87:59 pm
ONT
- MKE
1 stop16h 44m
Alaska Airlines
Deal found 3/10![Alaska Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 3/15. 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.
vie. 5/810:20 am
MKE
- ONT
1 stop7h 30m
Southwest
lun. 5/115:05 pm
ONT
- MKE
1 stop5h 50m
Southwest
Deal found 3/15![Southwest logo]()
$405
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/59:37 am
MKE
- ONT
2 stops12h 59m
United Airlines
mié. 5/61:40 pm
ONT
- MKE
1 stop5h 47m
United Airlines
Deal found 3/10![United Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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.
vie. 5/83:09 pm
MKE
- ONT
1 stop10h 50m
Alaska Airlines
sáb. 5/166:00 am
ONT
- MKE
1 stop7h 44m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 3/12. 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.
jue. 5/76:10 am
MKE
- ONT
2 stops8h 00m
Southwest
mié. 5/136:30 am
ONT
- MKE
2 stops8h 55m
Southwest
Deal found 3/12![Southwest logo]()
$437
Last-minute flights from Milwaukee to OntarioDiscover last-minute flight deals from Milwaukee to Ontario. Data last updated marzo 15, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Ontario. Data last updated marzo 15, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/261:57 pm
MKE
- ONT
1 stop27h 40m
Frontier
mié. 4/110:03 pm
ONT
- MKE
1 stop11h 59m
Frontier
Deal found 3/11![Frontier logo]()
$281
This Gotogate deal was found by Cheapflights users on 3/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/261:57 pm
MKE
- ONT
1 stop27h 40m
Frontier
lun. 3/309:49 pm
ONT
- MKE
1 stop13h 13m
Frontier
Deal found 3/11![Frontier logo]()
$319
This Delta deal was found by Cheapflights users on 3/15. 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.
lun. 4/137:25 am
MKE
- ONT
1 stop6h 49m
Delta
mié. 4/1512:49 pm
ONT
- MKE
1 stop9h 08m
Delta
Deal found 3/15![Delta logo]()
$345
This Southwest deal was found by Cheapflights users on 3/14. 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.
mié. 4/155:45 pm
MKE
- ONT
1 stop5h 45m
Southwest
sáb. 4/256:20 am
ONT
- MKE
1 stop8h 30m
Southwest
Deal found 3/14![Southwest logo]()
$317
This American Airlines deal was found by Cheapflights users on 3/12. 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.
mié. 4/1511:49 am
MKE
- ONT
2 stops8h 41m
American Airlines
sáb. 4/256:15 am
ONT
- MKE
2 stops10h 34m
American Airlines
Deal found 3/12![American Airlines logo]()
$327
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/176:29 pm
MKE
- ONT
1 stop7h 26m
Frontier
dom. 4/1912:59 am
ONT
- MKE
1 stop13h 11m
Frontier
Deal found 3/15![Frontier logo]()
$279
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/205:05 pm
MKE
- ONT
1 stop8h 50m
Frontier
dom. 4/2612:59 am
ONT
- MKE
1 stop13h 11m
Frontier
Deal found 3/12![Frontier logo]()
$210
This Southwest deal was found by Cheapflights users on 3/12. 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.
lun. 4/204:50 pm
MKE
- ONT
2 stops8h 15m
Southwest
lun. 4/273:00 pm
ONT
- MKE
1 stop8h 05m
Southwest
Deal found 3/12![Southwest logo]()
$338
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 marzo 15, 2026.
Search for one-way flight options from Milwaukee to Ontario. Find affordable one-way fares based on user searches. Data last updated marzo 15, 2026.
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/275:05 pm
MKE
- ONT
1 stop8h 50m
Frontier
Deal found 3/12![Frontier logo]()
$105
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/311:57 pm
MKE
- ONT
1 stop28h 00m
Frontier
Deal found 3/11![Frontier logo]()
$114
This Mytrip deal was found by Cheapflights users on 3/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/241:57 pm
MKE
- ONT
1 stop25h 31m
Frontier
Deal found 3/13![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/307:15 pm
MKE
- ONT
1 stop6h 44m
Frontier
Deal found 3/10![Frontier logo]()
$145
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
sáb. 4/257:00 am
MKE
- ONT
1 stop9h 32m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$159
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/237:15 pm
MKE
- ONT
1 stop6h 44m
Frontier
Deal found 3/15![Frontier logo]()
$160
This American Airlines deal was found by Cheapflights users on 3/12. 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.
lun. 4/279:08 am
MKE
- ONT
2 stops11h 22m
American Airlines
Deal found 3/12![American Airlines logo]()
$172
This Mytrip deal was found by Cheapflights users on 3/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/261:57 pm
MKE
- ONT
1 stop27h 40m
Frontier
Deal found 3/12![Frontier logo]()
$175
This United Airlines deal was found by Cheapflights users on 3/11. 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.
sáb. 4/45:37 pm
MKE
- ONT
1 stop6h 54m
United Airlines
Deal found 3/11![United Airlines logo]()
$204
This United Airlines deal was found by Cheapflights users on 3/12. 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.
sáb. 4/258:15 am
MKE
- ONT
2 stops11h 32m
United Airlines
Deal found 3/12![United Airlines logo]()
$209
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 marzo 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $210 (Frontier) |
One-way from | $105 (Frontier) |
Popular in | February |
Cheapest in | January |
Average price | $466 |
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 marzo 15, 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
jue. 5/7
6:45 am-12:19 pm
1 stop7h 34m
Ontario
mié. 5/13
1:29 pm-9:33 pm
1 stop6h 04m
$345
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
mar. 5/5
7:00 am-2:32 pm
1 stop9h 32m
Ontario
vie. 5/8
7:59 pm-2:43 pm
1 stop16h 44m
$363
Quickest round-trip
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
vie. 5/8
10:20 am-3:50 pm
1 stop7h 30m
Ontario
lun. 5/11
5:05 pm-12:55 am
1 stop5h 50m
$405
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
mar. 5/5
9:37 am-8:36 pm
2 stops12h 59m
Ontario
mié. 5/6
1:40 pm-9:27 pm
1 stop5h 47m
$412
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
vie. 5/8
3:09 pm-11:59 pm
1 stop10h 50m
Ontario
sáb. 5/16
6:00 am-3:44 pm
1 stop7h 44m
$427
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
jue. 5/7
6:10 am-12:10 pm
2 stops8h 00m
Ontario
mié. 5/13
6:30 am-5:25 pm
2 stops8h 55m
$437
Cheapest one-way
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
mié. 4/29
7:00 am-2:32 pm
1 stop9h 32m
$159
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
mar. 4/28
7:00 am-2:32 pm
1 stop9h 32m
$159
Quickest one-way
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
sáb. 4/4
5:37 pm-10:31 pm
1 stop6h 54m
$204
MilwaukeeOntario
MKE - ONT
MKEONT
Milwaukee-Mitchell
mié. 4/29
8:15 am-5:47 pm
2 stops11h 32m
$209
Showing 1-10 of 18 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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 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
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 marzo 15, 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.
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Milwaukee
Popular flights
Alternative routes for Milwaukee to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
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 marzo 15, 2026.
Milwaukee and Ontario flights
Browse other Milwaukee and Ontario flight options. Last updated on marzo 15, 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 marzo 15, 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 marzo 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$300 | Average$407 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$324 | Average$377 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$344 | Average$434 | FlexibilityNo cancel fee | On-time69% |