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Oshkosh

$189+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$310
(Kiwi.com)

One-way from

$189
(Delta)

Popular in

April

Cheapest in

January

Average price

$607
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. 13% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:00 amONT - ATW
2 stops31h 35mMultiple Airlines
Sun 9/282:45 pmATW - ONT
1 stop8h 53mMultiple Airlines
Deal found 8/14$310
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:59 amONT - ATW
1 stop20h 40mMultiple Airlines
Mon 9/19:16 pmATW - ONT
1 stop21h 02mMultiple Airlines
Deal found 8/13$381
This United Airlines deal was found by Cheapflights users on 8/13. 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 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 12/912:30 pmATW - ONT
2 stops10h 12mUnited Airlines
Deal found 8/13$384
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:00 amONT - ATW
2 stops13h 43mUnited Airlines
Tue 9/25:25 pmATW - ONT
1 stop7h 05mUnited Airlines
Deal found 8/14$466
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 9/236:10 amONT - ATW
2 stops13h 22mAmerican Airlines
Sun 9/286:33 amATW - ONT
1 stop8h 46mAmerican Airlines
Deal found 8/14$488
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:00 amONT - ATW
1 stop7h 11mMultiple Airlines
Sun 8/241:05 pmATW - ONT
2 stops33h 47mMultiple Airlines
Deal found 8/14$506
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:15 pmONT - ATW
2 stops20h 50mUnited Airlines
Sun 9/286:45 pmATW - ONT
2 stops24h 38mUnited Airlines
Deal found 8/14$538

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 August 14, 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

Tue 9/23

8:00 am-5:35 pm

2 stops31h 35m

Appleton Intl

Sun 9/28

2:45 pm-9:38 pm

1 stop8h 53m

$310

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 8/27

12:59 am-11:39 pm

1 stop20h 40m

Appleton Intl

Mon 9/1

9:16 pm-4:18 pm

1 stop21h 02m

$381

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 8/29

6:00 am-9:43 pm

2 stops13h 43m

Appleton Intl

Tue 9/2

5:25 pm-10:30 pm

1 stop7h 05m

$466

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 9/23

6:10 am-9:32 pm

2 stops13h 22m

Appleton Intl

Sun 9/28

6:33 am-1:19 pm

1 stop8h 46m

$488

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 8/22

6:00 am-3:11 pm

1 stop7h 11m

Appleton Intl

Sun 8/24

1:05 pm-8:52 pm

2 stops33h 47m

$506

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 9/23

1:15 pm-12:05 pm

2 stops20h 50m

Appleton Intl

Sun 9/28

6:45 pm-5:23 pm

2 stops24h 38m

$538

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 9/11

5:10 am-9:08 pm

1 stop13h 58m

Appleton Intl

Mon 9/15

8:44 am-8:43 pm

1 stop13h 59m

$546

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 10/8

11:36 am-9:42 pm

1 stop8h 06m

$189

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 9/23

11:55 am-10:40 pm

1 stop8h 45m

$189

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 8/31

11:45 am-10:53 pm

1 stop9h 08m

$195

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 15 results
1
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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, February is the cheapest month in which you can book a flight from Ontario to Oshkosh (average of $280). Flying from Ontario to Oshkosh in June is currently the most expensive (average of $376). 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 August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Oshkosh as you normally would.

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 Saturday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Ontario to Oshkosh?

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 August 14, 2025.
Peruse reviews from past customers who have flown with United Airlines and American 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
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

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
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

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.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

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 5 different airlines.

  • 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, February is the cheapest month in which you can book a flight from Ontario to Oshkosh (average of $280). Flying from Ontario to Oshkosh in June is currently the most expensive (average of $376). 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.

See more FAQs

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Top 5 airlines flying from Ontario to Oshkosh

Discover the top 5 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$218FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$419FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$288Average$470FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$531FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$417FlexibilityNo cancel feeOn-time63%

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