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Oshkosh

$139+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$313
(Delta)

One-way from

$139
(Delta)

Popular in

October

Cheapest in

January

Average price

$491
Provider with most accurate pricing for Los Angeles-Appleton Intl flight deals.
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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. 17% potential increase in price ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Delta deal was found by Cheapflights users on 3/30. 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 5/312:07 pmONT - ATW
1 stop8h 22mDelta
Tue 5/65:20 amATW - ONT
1 stop7h 37mDelta
Deal found 3/30$313
This United Airlines deal was found by Cheapflights users on 3/30. 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 5/257:00 amONT - ATW
1 stop7h 48mUnited Airlines
Wed 5/283:43 pmATW - ONT
1 stop8h 43mUnited Airlines
Deal found 3/30$317
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/211:59 pmONT - ATW
2 stops8h 55mAmerican Airlines
Tue 5/66:19 amATW - ONT
1 stop7h 31mAmerican Airlines
Deal found 3/30$382

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 March 31, 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 5/3

12:07 pm-10:29 pm

1 stop8h 22m

Appleton Intl

Tue 5/6

5:20 am-10:57 am

1 stop7h 37m

$313

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 5/25

7:00 am-4:48 pm

1 stop7h 48m

Appleton Intl

Wed 5/28

3:43 pm-10:26 pm

1 stop8h 43m

$317

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 4/10

12:50 pm-10:33 pm

1 stop7h 43m

Appleton Intl

Tue 4/29

11:24 am-8:59 pm

2 stops11h 35m

$359

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 5/30

12:18 pm-10:26 pm

1 stop8h 08m

$139

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 5/25

7:00 am-4:48 pm

1 stop7h 48m

$159

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 5/9

12:45 pm-9:42 pm

1 stop6h 57m

$215

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 March 31, 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.

Rainfall in Oshkosh by month

Plan your trip to Oshkosh by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Oshkosh ranges from 1.1 - 3.8 inches per month. June is typically the wettest month, when rainfall can reach 3.8 in. February is typically the driest time to visit Oshkosh when rainfall is around 1.1 in.

Temperature in Oshkosh by month

Plan your trip to Oshkosh by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Oshkosh, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 17.6 F).

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 March 31, 2025.
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
United Airlines
7.4
Good
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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.

  • What are the cheapest airlines to fly from Ontario to Oshkosh one-way?

    $139 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $159 and $215, respectively.

  • 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.

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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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$231FlexibilityNo cancel feeOn-time62%
DeltaCheapest$254Average$435FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$263Average$505FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$531FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$429FlexibilityNo cancel feeOn-time63%
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