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Oshkosh

$224+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
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 January 14, 2026.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$379
(Delta)

One-way from

$224
(Delta)

Popular in

April

Cheapest in

February

Average price

$430
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. 14% potential increase in price ($91 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 14, 2026.

This United Airlines deal was found by Cheapflights users on 1/13. 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.
Tue 9/227:00 am
ONT
-
ATW
1 stop7h 50m
United Airlines
Tue 10/205:35 pm
ATW
-
ONT
1 stop6h 51m
United Airlines
Deal found 1/13$309
This Delta deal was found by Cheapflights users on 1/12. 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 1/3112:41 pm
ONT
-
ATW
1 stop7h 05m
Delta
Thu 2/55:20 am
ATW
-
ONT
1 stop8h 11m
Delta
Deal found 1/12$379
This Delta deal was found by Cheapflights users on 1/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Sat 10/245:29 am
ATW
-
ONT
1 stop7h 58m
Delta
Deal found 1/13$404
This United Airlines deal was found by Cheapflights users on 1/12. 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 1/315:05 am
ONT
-
ATW
2 stops9h 43m
United Airlines
Thu 2/52:45 pm
ATW
-
ONT
2 stops10h 08m
United Airlines
Deal found 1/12$409
This United Airlines deal was found by Cheapflights users on 1/12. 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 2/36:00 am
ONT
-
ATW
2 stops11h 15m
United Airlines
Sat 2/712:35 pm
ATW
-
ONT
2 stops11h 23m
United Airlines
Deal found 1/12$410
This United Airlines deal was found by Cheapflights users on 1/12. 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 1/275:05 am
ONT
-
ATW
2 stops9h 43m
United Airlines
Sat 1/3112:35 pm
ATW
-
ONT
2 stops10h 23m
United Airlines
Deal found 1/12$533

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 January 14, 2026.
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 1/31

12:41 pm-9:46 pm

1 stop7h 05m

Appleton Intl

Thu 2/5

5:20 am-11:31 am

1 stop8h 11m

$379

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 1/31

5:05 am-4:48 pm

2 stops9h 43m

Appleton Intl

Thu 2/5

2:45 pm-10:53 pm

2 stops10h 08m

$409

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 2/3

6:00 am-7:15 pm

2 stops11h 15m

Appleton Intl

Sat 2/7

12:35 pm-9:58 pm

2 stops11h 23m

$410

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 1/27

5:05 am-4:48 pm

2 stops9h 43m

Appleton Intl

Sat 1/31

12:35 pm-8:58 pm

2 stops10h 23m

$533

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 1/17

1:24 pm-8:50 pm

1 stop5h 26m

Appleton Intl

Tue 1/20

2:45 pm-10:53 pm

2 stops10h 08m

$572

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 2/24

10:20 pm-11:27 am

2 stops11h 07m

$224

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Mon 2/23

10:20 pm-10:42 am

2 stops10h 22m

$251

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 3/12

10:25 pm-10:32 am

2 stops10h 07m

$251

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 2/4

1:24 pm-8:50 pm

1 stop5h 26m

$264

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 2/24

5:00 am-4:44 pm

2 stops9h 44m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

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, 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 $259). 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.

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 January 14, 2026.
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
9,156 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,156 reviews
United Airlines
7.4
Good
9,156 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 or United Airlines to get the fastest option. Airlines will cover a distance of 1697 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $259). 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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Alternative routes for Ontario to Oshkosh

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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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$230Average$427FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$598FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$524FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$420FlexibilityNo cancel feeOn-time63%

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