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Oshkosh

$219+ Cheap flights from Ontario (ONT) to Oshkosh, WI

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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap flight deals from Ontario to Oshkosh

Keep the following information in mind while searching for Ontario to Oshkosh flight deals. Data was last updated November 21, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$329
(Delta)

One-way from

$219
(Delta)

Popular in

April

Cheapest in

January

Average price

$635
Provider with most accurate pricing for Los Angeles-Appleton Intl flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Appleton Intl flights.
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From Ontario to Oshkosh
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One-way flight from Ontario to Oshkosh
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Highest demand for flights based on searches. 16% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Oshkosh

Cheapest flights from Ontario to Oshkosh
Explore the most affordable flight options available from Ontario to Oshkosh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

This Delta deal was found by Cheapflights users on 11/18. 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 12/212:12 pmONT - ATW
1 stop7h 52mDelta
Wed 12/104:18 pmATW - ONT
2 stops9h 40mDelta
Deal found 11/18$329
This Delta deal was found by Cheapflights users on 11/20. 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.
Sat 12/612:12 pmONT - ATW
1 stop7h 29mDelta
Tue 12/96:00 amATW - ONT
2 stops13h 07mDelta
Deal found 11/20$364
This American Airlines deal was found by Cheapflights users on 11/21. 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 12/612:46 pmONT - ATW
1 stop6h 24mAmerican Airlines
Tue 12/96:03 amATW - ONT
1 stop9h 52mAmerican Airlines
Deal found 11/21$491
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/61:34 pmONT - ATW
1 stop5h 26mUnited Airlines
Tue 12/98:30 amATW - ONT
1 stop6h 02mUnited Airlines
Deal found 11/20$522
This American Airlines deal was found by Cheapflights users on 11/20. 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 12/259:53 amONT - ATW
2 stops9h 21mAmerican Airlines
Thu 1/16:07 amATW - ONT
1 stop7h 46mAmerican Airlines
Deal found 11/20$551
This Delta deal was found by Cheapflights users on 11/19. 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 11/276:00 amONT - ATW
2 stops10h 15mDelta
Tue 12/24:18 pmATW - ONT
2 stops9h 40mDelta
Deal found 11/19$561
This American Airlines deal was found by Cheapflights users on 11/20. 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 12/2412:45 pmONT - ATW
1 stop6h 29mAmerican Airlines
Fri 1/26:07 amATW - ONT
1 stop7h 46mAmerican Airlines
Deal found 11/20$571
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:15 amONT - ATW
1 stop8h 16mDelta
Wed 12/315:25 amATW - ONT
1 stop16h 25mDelta
Deal found 11/20$578
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:00 amONT - ATW
1 stop6h 07mUnited Airlines
Sun 12/712:30 pmATW - ONT
2 stops11h 19mUnited Airlines
Deal found 11/20$579
This American Airlines deal was found by Cheapflights users on 11/20. 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 12/259:53 amONT - ATW
2 stops9h 21mAmerican Airlines
Wed 12/316:07 amATW - ONT
1 stop7h 46mAmerican Airlines
Deal found 11/20$588

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Oshkosh 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 November 21, 2025.
Use the filters below to find and compare flights from Ontario to Oshkosh that are best for you.

Fly from

Ontario

Fly to

Oshkosh

Route

Depart

Return

Price

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 12/6

12:12 pm-9:41 pm

1 stop7h 29m

Appleton Intl

Wed 12/10

4:18 pm-11:58 pm

2 stops9h 40m

$329

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 12/4

12:12 pm-10:04 pm

1 stop7h 52m

Appleton Intl

Wed 12/10

4:18 pm-11:58 pm

2 stops9h 40m

$329

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 12/2

12:12 pm-10:04 pm

1 stop7h 52m

Appleton Intl

Wed 12/10

4:18 pm-11:58 pm

2 stops9h 40m

$329

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 12/3

12:12 pm-10:04 pm

1 stop7h 52m

Appleton Intl

Wed 12/10

4:18 pm-11:58 pm

2 stops9h 40m

$329

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 12/6

12:12 pm-9:41 pm

1 stop7h 29m

Appleton Intl

Tue 12/9

6:00 am-5:07 pm

2 stops13h 07m

$364

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 1/8

1:24 pm-8:50 pm

1 stop5h 26m

Appleton Intl

Mon 1/12

12:35 pm-10:53 pm

2 stops12h 18m

$384

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 3/28

10:30 pm-11:21 am

2 stops10h 51m

Appleton Intl

Wed 4/1

5:29 am-11:38 am

1 stop8h 09m

$449

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 12/6

1:34 pm-9:00 pm

1 stop5h 26m

Appleton Intl

Tue 12/9

8:30 am-12:32 pm

1 stop6h 02m

$522

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 12/24

11:15 am-9:31 pm

1 stop8h 16m

$219

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 12/25

11:15 am-9:31 pm

1 stop8h 16m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 14 results
1
2

Best time to book a flight from Ontario to Oshkosh

Have a flexible travel schedule? Discover the best time to fly to Oshkosh from Ontario with our price prediction graph.
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 Ontario to Oshkosh

What is the cheapest month to book a flight from Ontario to Oshkosh?

Currently, May is the cheapest month in which you can book a flight from Ontario to Oshkosh (average of $99). Flying from Ontario to Oshkosh in December is currently the most expensive (average of $267). 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.

What is the cheapest time of day to fly from ONT to OS9?

Find hourly flight availability from Ontario to Oshkosh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2025.

One of the essential ways to save on airfare from Ontario to Oshkosh is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 11% on airfare.

What is the cheapest day to fly from Ontario to Oshkosh?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Oshkosh. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Oshkosh flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Oshkosh

Get insights into the airlines that provide service to Oshkosh. 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 Oshkosh. Reviews last updated November 21, 2025.
Peruse reviews from past customers who have flown with United Airlines from Ontario to Oshkosh to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,029 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.
United Airlines
7.4
Good
9,029 reviews
United Airlines
7.4
Good
9,029 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Oshkosh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Oshkosh?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Oshkosh from Ontario. Booking flights from Ontario (ONT) to Oshkosh should be relatively easy as there are 0 daily outbound flights to Oshkosh from 4 different airlines.

  • How long is the flight from Ontario to Oshkosh?

    There are many flights that can get you from Ontario to Oshkosh in 7h 52m. Fly via Delta to get the fastest option. Airlines will cover a distance of 1697 mi.

  • Can I find deals for flights from Ontario to Oshkosh that include hotel bookings?

    Yes. In addition to deals on Ontario to Oshkosh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Oshkosh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oshkosh.

  • Can I find deals for business class flights from Ontario to Oshkosh?

    Yes. Cheapflights offers flight deals from Ontario to Oshkosh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Oshkosh?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Oshkosh (average of $99). Flying from Ontario to Oshkosh in December is currently the most expensive (average of $267). 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.

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Top 4 airlines flying from Ontario to Oshkosh

Discover the top 4 airlines that operate flights from Ontario to Oshkosh. 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 November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$427FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$599FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$521FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$427FlexibilityNo cancel feeOn-time63%

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