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Oshkosh

$220+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This Delta deal was found by Cheapflights users on 1/27. 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 5/1912:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Fri 5/2910:55 am
ATW
-
ONT
2 stops13h 14m
Delta
Deal found 1/27$314
This Delta deal was found by Cheapflights users on 1/27. 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 5/1912:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Thu 5/284:05 pm
ATW
-
ONT
2 stops9h 39m
Delta
Deal found 1/27$339
This Delta deal was found by Cheapflights users on 1/27. 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.
Wed 5/2012:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Wed 5/2710:55 am
ATW
-
ONT
2 stops13h 14m
Delta
Deal found 1/27$348
This Delta deal was found by Cheapflights users on 1/27. 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.
Wed 5/2012:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Mon 5/254:05 pm
ATW
-
ONT
2 stops9h 39m
Delta
Deal found 1/27$373
This Delta deal was found by Cheapflights users on 1/27. 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 5/1912:00 pm
ONT
-
ATW
1 stop7h 58m
Delta
Wed 5/275:29 am
ATW
-
ONT
1 stop7h 51m
Delta
Deal found 1/27$384
This United Airlines deal was found by Cheapflights users on 1/27. 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 5/197:00 am
ONT
-
ATW
1 stop6h 09m
United Airlines
Thu 5/282:43 pm
ATW
-
ONT
1 stop9h 43m
United Airlines
Deal found 1/27$399
This Delta deal was found by Cheapflights users on 1/27. 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 5/195:05 pm
ONT
-
ATW
2 stops26h 22m
Delta
Mon 5/254:05 pm
ATW
-
ONT
2 stops9h 39m
Delta
Deal found 1/27$403
This Delta deal was found by Cheapflights users on 1/27. 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.
Wed 5/205:05 pm
ONT
-
ATW
2 stops20h 28m
Delta
Tue 5/264:05 pm
ATW
-
ONT
2 stops9h 39m
Delta
Deal found 1/27$428
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Wed 3/2511:59 pm
ONT
-
ATW
1 stop6h 22m
United Airlines
Wed 4/18:35 am
ATW
-
ONT
2 stops11h 12m
United Airlines
Deal found 1/26$429
This Delta deal was found by Cheapflights users on 1/27. 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.
Mon 5/185:05 pm
ONT
-
ATW
2 stops26h 22m
Delta
Fri 5/2910:55 am
ATW
-
ONT
2 stops13h 14m
Delta
Deal found 1/27$437

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$314
(Delta)

One-way from

$220
(Delta)

Popular in

April

Cheapest in

February

Average price

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

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 28, 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

Tue 5/19

12:00 pm-9:58 pm

1 stop7h 58m

Appleton Intl

Tue 5/26

4:05 pm-11:44 pm

2 stops9h 39m

$314

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 5/20

12:00 pm-9:58 pm

1 stop7h 58m

Appleton Intl

Wed 5/27

10:55 am-10:09 pm

2 stops13h 14m

$348

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 5/20

12:00 pm-9:58 pm

1 stop7h 58m

Appleton Intl

Fri 5/29

10:55 am-10:09 pm

2 stops13h 14m

$348

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 5/20

12:00 pm-9:58 pm

1 stop7h 58m

Appleton Intl

Mon 5/25

4:05 pm-11:44 pm

2 stops9h 39m

$373

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 5/20

12:00 pm-9:58 pm

1 stop7h 58m

Appleton Intl

Thu 5/28

4:05 pm-11:44 pm

2 stops9h 39m

$373

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 5/19

5:05 pm-11:11 am

2 stops16h 06m

Appleton Intl

Wed 5/27

10:55 am-10:09 pm

2 stops13h 14m

$378

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 5/19

5:05 pm-11:11 am

2 stops16h 06m

Appleton Intl

Fri 5/29

10:55 am-10:09 pm

2 stops13h 14m

$378

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 5/19

7:00 am-3:09 pm

1 stop6h 09m

Appleton Intl

Thu 5/28

2:43 pm-10:26 pm

1 stop9h 43m

$399

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Wed 3/25

11:59 pm-8:21 am

1 stop6h 22m

Appleton Intl

Wed 4/1

2:54 pm-10:26 pm

1 stop9h 32m

$399

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 3/26

11:59 pm-8:21 am

1 stop6h 22m

Appleton Intl

Wed 4/1

2:54 pm-10:26 pm

1 stop9h 32m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 21 results
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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 $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.

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 28, 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
9,209 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

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
9,209 reviews
United Airlines
7.4
Good
9,209 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

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 58m. 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 $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.

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 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$391FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$598FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$487FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$418FlexibilityNo cancel feeOn-time63%

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