$198 Cheap Flights from Appleton (ATW) to Ontario (ONT)

View $198 flight on Sat, Feb 28, 2026Opens in a new window

Popular airlines from Appleton, WI (ATW-Appleton Intl.) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Appleton to Ontario (ATW-ONT)

Prices were available within the past 7 days and start at $198 for one-way flights and $289 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Jan 21 - Wed, Jan 28
ATW
Appleton
ONT
Ontario
$289 Roundtrip, found 3 hours ago
$289
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Wed, Jan 21 from Appleton to Ontario, returning Wed, Jan 28, priced at $289 found 3 hours ago
United
Sat, Oct 4 - Sun, Oct 5
ATW
Appleton
ONT
Ontario
$294 Roundtrip, found 6 days ago
$294
Roundtrip
found 6 days ago
Select United flight, departing Sat, Oct 4 from Appleton to Ontario, returning Sun, Oct 5, priced at $294 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
ATW
Appleton
ONT
Ontario
$314 Roundtrip, found 22 hours ago
$314
Roundtrip
found 22 hours ago
Select United flight, departing Wed, Oct 29 from Appleton to Ontario, returning Tue, Nov 4, priced at $314 found 22 hours ago
United
Wed, Oct 29 - Tue, Nov 4
ATW
Appleton
ONT
Ontario
$319 Roundtrip, found 22 hours ago
$319
Roundtrip
found 22 hours ago
Select United flight, departing Wed, Oct 29 from Appleton to Ontario, returning Tue, Nov 4, priced at $319 found 22 hours ago
Delta
Tue, Oct 28 - Sat, Nov 1
ATW
Appleton
ONT
Ontario
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 28 from Appleton to Ontario, returning Sat, Nov 1, priced at $319 found 2 days ago
American Airlines
Tue, Sep 30 - Tue, Oct 7
ATW
Appleton
ONT
Ontario
$333 Roundtrip, found 7 hours ago
$333
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Tue, Sep 30 from Appleton to Ontario, returning Tue, Oct 7, priced at $333 found 7 hours ago
United
Wed, Oct 29 - Wed, Nov 5
ATW
Appleton
ONT
Ontario
$338 Roundtrip, found 6 days ago
$338
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Appleton to Ontario, returning Wed, Nov 5, priced at $338 found 6 days ago
United
Wed, Apr 1 - Tue, Apr 7
ATW
Appleton
ONT
Ontario
$341 Roundtrip, found 6 hours ago
$341
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Apr 1 from Appleton to Ontario, returning Tue, Apr 7, priced at $341 found 6 hours ago
United
Wed, Jan 21 - Mon, Jan 26
ATW
Appleton
ONT
Ontario
$343 Roundtrip, found 5 days ago
$343
Roundtrip
found 5 days ago
Select United flight, departing Wed, Jan 21 from Appleton to Ontario, returning Mon, Jan 26, priced at $343 found 5 days ago
Delta
Sat, Oct 25 - Tue, Oct 28
ATW
Appleton
ONT
Ontario
$344 Roundtrip, found 2 days ago
$344
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Oct 25 from Appleton to Ontario, returning Tue, Oct 28, priced at $344 found 2 days ago

Find the cheapest month to fly from Appleton (ATW) to Ontario (ONT)

May is typically the cheapest month to fly

From $256 - $564 per traveler.

Frequently asked questions

How much does a flight from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Lock in a cheap one-way flight from $198 or cheap return flight from $289 from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT)?
Traveling in January may help you find better deals, as it's the cheapest month for flights between ATW and ONT. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline that'll fly you from ATW to ONT, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT)?
There aren't any daily nonstop flights departing from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from ATW to ONT?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT)?
To reach Los Angeles - Ontario Intl. Airport (ONT) without delays, select a flight that leaves Appleton Intl. Airport (ATW) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute fares from ATW to ONT are generally more expensive. To lock in the lowest rates, start looking for flights early. That said, if you can play around with your travel dates, it's possible to land a cheap fare right before your journey.
Is it cheaper to book an ATW to ONT flight and hotel package?
Opting for an ATW to ONT flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our wide range of hotels and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Appleton Intl. Airport (ATW) to Los Angeles - Ontario Intl. Airport (ONT)?
It's generally possible to reschedule or cancel your ATW to ONT flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Appleton Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$288
Distance
1697 mi

Book with confidence

Book with confidence

Appleton to Ontario Flights

The cheapest times to fly from Appleton to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Appleton to Ontario are during the month of January. You can find some of the cheapest flights from Appleton to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Appleton to Ontario

Sunday is one of the best days to book for cheap flights from Appleton to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Appleton to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Appleton to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $198 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Appleton to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Appleton to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Appleton to Ontario Flights

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*Available to One Key members.