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Flights from Milwaukee to Ontario
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Flights from Milwaukee to Ontario Starting at €40

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • MKE10:32
        15h 27m
        1 stop
        ONT23:59
        Tue, Mar 4|Milwaukee - Ontario|Frontier Airlines
        €40€158
        75% OFF
        75% OFF
        €158€40

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Tue, Mar 4, arriving at Ontario International Airport. One-way Prices start from €40 including taxes and charges.

      • MKE10:32
        15h 37m
        1 stop
        ONT00:09
        Thu, Mar 6|Milwaukee - Ontario|Frontier Airlines
        €55€158
        65% OFF
        65% OFF
        €158€55

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Thu, Mar 6, arriving at Ontario International Airport. One-way Prices start from €55 including taxes and charges.

      • MKE10:32
        15h 27m
        1 stop
        ONT23:59
        Tue, Feb 25|Milwaukee - Ontario|Frontier Airlines
        €65€158
        59% OFF
        59% OFF
        €158€65

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Tue, Feb 25, arriving at Ontario International Airport. One-way Prices start from €65 including taxes and charges.

      • MKE10:32
        24h 50m
        1 stop
        ONT09:22
        Sun, Apr 6|Milwaukee - Ontario|Frontier Airlines
        €65
        €65

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Sun, Apr 6, arriving at Ontario International Airport. One-way Prices start from €65 including taxes and charges.

      • MKE10:32
        15h 37m
        1 stop
        ONT00:09
        Thu, Mar 13|Milwaukee - Ontario|Frontier Airlines
        €69
        €69

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Thu, Mar 13, arriving at Ontario International Airport. One-way Prices start from €69 including taxes and charges.

      • MKE10:32
        25h 53m
        1 stop
        ONT10:25
        Sun, Mar 2|Milwaukee - Ontario|Frontier Airlines
        €78
        €78

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Sun, Mar 2, arriving at Ontario International Airport. One-way Prices start from €78 including taxes and charges.

      • MKE10:32
        24h 50m
        1 stop
        ONT09:22
        Thu, Apr 10|Milwaukee - Ontario|Frontier Airlines
        €83
        €83

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Thu, Apr 10, arriving at Ontario International Airport. One-way Prices start from €83 including taxes and charges.

      • MKE10:32
        15h 22m
        1 stop
        ONT23:54
        Sun, Feb 23|Milwaukee - Ontario|Frontier Airlines
        €90
        €90

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Sun, Feb 23, arriving at Ontario International Airport. One-way Prices start from €90 including taxes and charges.

      • MKE10:32
        24h 50m
        1 stop
        ONT09:22
        Sun, Apr 13|Milwaukee - Ontario|Frontier Airlines
        €93
        €93

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Sun, Apr 13, arriving at Ontario International Airport. One-way Prices start from €93 including taxes and charges.

      • MKE15:38
        21h 48m
        1 stop
        ONT11:26
        Sun, May 4|Milwaukee - Ontario|Frontier Airlines
        €102
        €102

        Choose Frontier Airlines flights from Milwaukee to Ontario. The one-way connecting flight with Frontier Airlines departs from General Mitchell International Airport on Sun, May 4, arriving at Ontario International Airport. One-way Prices start from €102 including taxes and charges.

      • MKE01:00 pm
        3h 5m
        Nonstop
        ONT02:00 pm
        Fri, Feb 28|Milwaukee - Ontario|Frontier Airlines
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Milwaukee to Los Angeles flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. WN664

    Southwest Airlines

    05:45

    MKE

    2.8h

    07:35

    DEN

    SM-WT-S
    Search

  2. F93825

    Frontier Airlines

    22:22

    DEN

    2.5h

    23:54

    ONT

    ------S

  3. DL1221

    Delta Air Lines

    06:00

    MKE

    2.1h

    09:05

    ATL

    SMTWTFS
    Search

  4. DL665

    Delta Air Lines

    09:40

    ATL

    4.7h

    11:24

    ONT

    SMTWTFS

  5. AS323

    Alaska Airlines

    06:18

    MKE

    4.6h

    08:54

    SEA

    SMTWTFS
    Search

  6. AS1003

    Alaska Airlines

    20:15

    SEA

    2.5h

    22:46

    ONT

    SMTWTFS

  7. AS323

    Alaska Airlines

    06:18

    MKE

    4.6h

    08:54

    SEA

    SMTWTFS
    Search

  8. AS1088

    Alaska Airlines

    17:55

    SEA

    2.6h

    20:29

    ONT

    -MT----

  9. DL2716

    Delta Air Lines

    07:15

    MKE

    3.6h

    09:50

    SLC

    SMTWTFS
    Search

  10. DL1345

    Delta Air Lines

    11:30

    SLC

    1.9h

    12:24

    ONT

    SMTWTFS

  11. DL2233

    Delta Air Lines

    07:15

    MKE

    3.6h

    09:50

    SLC

    -MTWT-S
    Search

  12. DL1345

    Delta Air Lines

    11:30

    SLC

    1.9h

    12:24

    ONT

    SMTWTFS

  13. F91607

    Frontier Airlines

    10:32

    MKE

    2.8h

    12:18

    DEN

    -M-W--S
    Search

  14. F91499

    Frontier Airlines

    22:37

    DEN

    2.4h

    23:59

    ONT

    SMTWTFS

  15. F91607

    Frontier Airlines

    10:32

    MKE

    2.8h

    12:18

    DEN

    -M-W--S
    Search

  16. F93825

    Frontier Airlines

    22:22

    DEN

    2.5h

    23:54

    ONT

    ------S

  17. DL1246

    Delta Air Lines

    14:45

    MKE

    2.1h

    17:51

    ATL

    SMTWTFS
    Search

  18. DL779

    Delta Air Lines

    20:59

    ATL

    4.7h

    22:41

    ONT

    SMTWTFS

  19. DL2152

    Delta Air Lines

    16:20

    MKE

    2.1h

    19:27

    ATL

    SMTWT-S
    Search

  20. DL779

    Delta Air Lines

    20:59

    ATL

    4.7h

    22:41

    ONT

    SMTWTFS
Find more flights and airlines

Find the best time to fly from Milwaukee to Ontario

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When are flight tickets from Milwaukee (MKE) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Milwaukee to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Milwaukee (MKE) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around €349.

How to find a cheap flight from Milwaukee to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Milwaukee to Ontario. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information from Milwaukee to Ontario

Cheapest nonstop flight price€39
Off-season for travelMay
Peak season for travelApril
Flight distance9,836.64 km
Popular airlineAlaska Airlines

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