HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oshkosh

$180+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Oshkosh with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(American Airlines)

One-way from

$180
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$554
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. 15% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 14, 2025.

This American Airlines deal was found by Cheapflights users on 10/14. 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.
Sat 12/612:46 pmONT - ATW
1 stop6h 24mAmerican Airlines
Tue 12/96:03 amATW - ONT
1 stop7h 50mAmerican Airlines
Deal found 10/14$289
This Delta deal was found by Cheapflights users on 10/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:12 pmONT - ATW
1 stop7h 58mDelta
Tue 12/912:20 pmATW - ONT
2 stops12h 44mDelta
Deal found 10/14$294
This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:26 pmONT - ATW
1 stop21h 58mMultiple Airlines
Mon 12/86:00 amATW - ONT
1 stop9h 31mMultiple Airlines
Deal found 10/12$295
This Delta deal was found by Cheapflights users on 10/13. 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.
Thu 11/611:36 amONT - ATW
1 stop7h 59mDelta
Sun 11/95:23 amATW - ONT
1 stop7h 43mDelta
Deal found 10/13$339
This Delta deal was found by Cheapflights users on 10/13. 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.
Mon 10/2010:00 pmONT - ATW
2 stops10h 31mDelta
Tue 10/2812:05 pmATW - ONT
2 stops11h 15mDelta
Deal found 10/13$389
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Sun 11/27:00 amONT - ATW
1 stop6h 07mUnited Airlines
Fri 11/145:31 pmATW - ONT
1 stop7h 00mUnited Airlines
Deal found 10/13$404
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Sun 11/27:00 amONT - ATW
1 stop6h 07mUnited Airlines
Thu 11/132:32 pmATW - ONT
2 stops10h 19mUnited Airlines
Deal found 10/13$409
This Delta deal was found by Cheapflights users on 10/13. 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 11/811:36 amONT - ATW
1 stop7h 59mDelta
Sun 11/95:23 amATW - ONT
1 stop7h 43mDelta
Deal found 10/13$439
This American Airlines deal was found by Cheapflights users on 10/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/712:46 pmONT - ATW
1 stop6h 31mAmerican Airlines
Sat 11/86:06 amATW - ONT
1 stop7h 48mAmerican Airlines
Deal found 10/13$444

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 October 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

Sat 12/6

12:46 pm-9:10 pm

1 stop6h 24m

Appleton Intl

Tue 12/9

6:03 am-11:53 am

1 stop7h 50m

$289

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 12/6

12:12 pm-10:10 pm

1 stop7h 58m

Appleton Intl

Tue 12/9

12:20 pm-11:04 pm

2 stops12h 44m

$294

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 12/4

2:26 pm-2:24 pm

1 stop21h 58m

Appleton Intl

Mon 12/8

6:00 am-1:31 pm

1 stop9h 31m

$295

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 11/6

11:36 am-9:35 pm

1 stop7h 59m

Appleton Intl

Sun 11/9

5:23 am-11:06 am

1 stop7h 43m

$339

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sat 2/21

10:38 am-9:04 pm

2 stops8h 26m

Appleton Intl

Tue 2/24

4:56 pm-11:43 pm

2 stops8h 47m

$389

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 11/2

7:00 am-3:07 pm

1 stop6h 07m

Appleton Intl

Fri 11/14

5:31 pm-10:31 pm

1 stop7h 00m

$404

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 11/2

7:00 am-3:07 pm

1 stop6h 07m

Appleton Intl

Thu 11/13

5:31 pm-10:31 pm

1 stop7h 00m

$404

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Sun 11/16

10:43 pm-11:14 pm

2 stops46h 31m

$180

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Thu 11/6

11:36 am-9:35 pm

1 stop7h 59m

$219

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Fri 11/7

12:46 pm-9:17 pm

1 stop6h 31m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 14 results
1
2

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 December is currently the most expensive (average of $241). 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 October 14, 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 October 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
8,976 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

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
8,976 reviews
United Airlines
7.4
Good
8,976 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

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
11,042 reviews
United Airlines
7.4
Good
8,976 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

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 6h 24m. Fly via American Airlines or Delta 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 December is currently the most expensive (average of $241). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Oshkosh

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Ontario to O'Hare Intl flights
Santa Ana to O'Hare Intl flights
San Diego to O'Hare Intl flights
Los Angeles to Minneapolis flights
San Francisco to Minneapolis flights
San Jose to O'Hare Intl flights
Sacramento to O'Hare Intl flights
Burbank to O'Hare Intl flights
San Diego to Minneapolis flights
Las Vegas to O'Hare Intl flights
Santa Ana to Minneapolis flights
Los Angeles to Milwaukee flights
Oakland to O'Hare Intl flights
San Jose to Minneapolis flights
Ontario to Minneapolis flights
Reno to O'Hare Intl flights
Las Vegas to Minneapolis flights
Sacramento to Minneapolis flights
Fresno to O'Hare Intl flights
Long Beach to O'Hare Intl flights
San Francisco to Milwaukee flights
Oakland to Minneapolis flights
Ontario to Milwaukee flights
Palm Springs to O'Hare Intl flights
Los Angeles to Madison flights
San Diego to Milwaukee flights
San Francisco to Madison flights
Los Angeles to Green Bay flights
Reno to Minneapolis flights
Ontario to Madison flights
Burbank to Minneapolis flights
Santa Ana to Milwaukee flights
San Diego to Madison flights
Las Vegas to Milwaukee flights
Sacramento to Madison flights
San Francisco to Appleton flights
Oakland to Milwaukee flights
Santa Barbara to Minneapolis flights
Long Beach to Minneapolis flights
San Jose to Madison flights
Palm Springs to Minneapolis flights
Santa Ana to Green Bay flights
Santa Ana to Madison flights
Los Angeles to Appleton flights
Santa Barbara to O'Hare Intl flights
Fresno to Green Bay flights
Monterey to O'Hare Intl flights
Burbank to Milwaukee flights

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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$427FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$587FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$526FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$413FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.