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Oshkosh

$234+ 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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
janv. 17 — janv. 241
sam. 1/17
sam. 1/24
1 adult, Economy
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Cheap 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 décembre 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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. 12/236:04 amONT - ATW
2 stops13h 33mUnited Airlines
sam. 12/273:24 pmATW - ONT
1 stop9h 01mUnited Airlines
Deal found 12/16$1,082

Find flight deals from Ontario to Oshkosh

Keep the following information in mind while searching for Ontario to Oshkosh flight deals. Data was last updated décembre 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$302
(Kiwi.com)

One-way from

$234
(Trip.com)

Popular in

April

Cheapest in

January

Average price

$493
Provider with most accurate pricing for Los Angeles-Appleton Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Appleton Intl flights.
Search Deals
From Ontario to Oshkosh
Search Deals
One-way flight from Ontario to Oshkosh
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 décembre 18, 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

mer. 1/28

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

jeu. 2/5

5:20 am-11:31 am

1 stop8h 11m

$334

OntarioAppleton

ONT - ATW

ONTATW

Ontario

mar. 1/27

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

sam. 1/31

11:03 am-9:05 pm

2 stops12h 02m

$339

OntarioAppleton

ONT - ATW

ONTATW

Ontario

ven. 1/30

7:30 am-3:40 pm

2 stops30h 10m

Appleton Intl

jeu. 2/5

5:20 am-11:31 am

1 stop8h 11m

$352

OntarioAppleton

ONT - ATW

ONTATW

Ontario

mar. 1/27

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

lun. 2/2

4:20 pm-11:58 pm

2 stops9h 38m

$369

OntarioAppleton

ONT - ATW

ONTATW

Ontario

ven. 1/30

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

mar. 2/3

4:20 pm-11:58 pm

2 stops9h 38m

$369

OntarioAppleton

ONT - ATW

ONTATW

Ontario

jeu. 1/29

6:00 am-5:43 pm

2 stops9h 43m

Appleton Intl

sam. 1/31

11:03 am-9:05 pm

2 stops12h 02m

$369

OntarioAppleton

ONT - ATW

ONTATW

Ontario

mer. 1/28

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

mer. 2/4

5:20 am-11:31 am

1 stop8h 11m

$374

OntarioAppleton

ONT - ATW

ONTATW

Ontario

jeu. 1/29

6:00 am-5:43 pm

2 stops9h 43m

Appleton Intl

ven. 2/6

4:20 pm-1:56 pm

2 stops23h 36m

$382

OntarioAppleton

ONT - ATW

ONTATW

Ontario

jeu. 1/29

6:00 am-5:43 pm

2 stops9h 43m

Appleton Intl

mer. 2/4

4:20 pm-10:44 pm

2 stops32h 24m

$382

OntarioAppleton

ONT - ATW

ONTATW

Ontario

jeu. 3/12

5:15 am-4:44 pm

2 stops9h 29m

$414

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 12 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, 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 January is currently the most expensive (average of $279). 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 décembre 18, 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 décembre 18, 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
9,091 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

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
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

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 05m. 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 January is currently the most expensive (average of $279). 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 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 décembre 18, 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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