$303 Cheap Flights from Twin Falls (TWF) to Ontario (ONT)

View $303 flight on Tue, Dec 30, 2025Opens in a new window

Popular airlines from Twin Falls, ID (TWF) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Twin Falls to Ontario (TWF-ONT)

Prices were available within the past 7 days and start at $303 for one-way flights and $362 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jan 6 - Tue, Jan 13
TWF
Twin Falls
ONT
Ontario
$362 Roundtrip, found 11 hours ago
$362
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Jan 6 from Twin Falls to Ontario, returning Tue, Jan 13, priced at $362 found 11 hours ago
Delta
Mon, Jan 5 - Tue, Jan 13
TWF
Twin Falls
ONT
Ontario
$372 Roundtrip, found 11 hours ago
$372
Roundtrip
found 11 hours ago
Select Delta flight, departing Mon, Jan 5 from Twin Falls to Ontario, returning Tue, Jan 13, priced at $372 found 11 hours ago
Delta
Sun, Dec 21 - Fri, Jan 2
TWF
Twin Falls
ONT
Ontario
$376 Roundtrip, found 6 days ago
$376
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, Dec 21 from Twin Falls to Ontario, returning Fri, Jan 2, priced at $376 found 6 days ago
Delta
Mon, Jan 5 - Sun, Jan 11
TWF
Twin Falls
ONT
Ontario
$382 Roundtrip, found 11 hours ago
$382
Roundtrip
found 11 hours ago
Select Delta flight, departing Mon, Jan 5 from Twin Falls to Ontario, returning Sun, Jan 11, priced at $382 found 11 hours ago
Delta
Tue, Dec 30 - Tue, Jan 13
TWF
Twin Falls
ONT
Ontario
$386 Roundtrip, found 20 hours ago
$386
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Dec 30 from Twin Falls to Ontario, returning Tue, Jan 13, priced at $386 found 20 hours ago
Delta
Tue, Dec 30 - Sun, Jan 11
TWF
Twin Falls
ONT
Ontario
$396 Roundtrip, found 20 hours ago
$396
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Dec 30 from Twin Falls to Ontario, returning Sun, Jan 11, priced at $396 found 20 hours ago
Delta
Thu, Dec 4 - Sun, Dec 14
TWF
Twin Falls
ONT
Ontario
$402 Roundtrip, found 20 hours ago
$402
Roundtrip
found 20 hours ago
Select Delta flight, departing Thu, Dec 4 from Twin Falls to Ontario, returning Sun, Dec 14, priced at $402 found 20 hours ago
Delta
Sun, Dec 21 - Wed, Dec 31
TWF
Twin Falls
ONT
Ontario
$407 Roundtrip, found 6 days ago
$407
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, Dec 21 from Twin Falls to Ontario, returning Wed, Dec 31, priced at $407 found 6 days ago
Delta
Mon, Jan 5 - Sat, Jan 17
TWF
Twin Falls
ONT
Ontario
$412 Roundtrip, found 11 hours ago
$412
Roundtrip
found 11 hours ago
Select Delta flight, departing Mon, Jan 5 from Twin Falls to Ontario, returning Sat, Jan 17, priced at $412 found 11 hours ago
Delta
Sat, Nov 8 - Sun, Nov 9
TWF
Twin Falls
ONT
Ontario
$422 Roundtrip, found 1 day ago
$422
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Nov 8 from Twin Falls to Ontario, returning Sun, Nov 9, priced at $422 found 1 day ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Los Angeles - Ontario Intl. ONT. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $547
ONT
Los Angeles - Ontario Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $547

Frequently asked questions

How much does a flight from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Secure a cheap one-way flight from $303 or cheap return flight from $362 from Twin Falls Airport (TWF) 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 deals on this route.
What is the cheapest month to fly from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT)?
Planning your trip for January is a good way to save, as it's the cheapest month for flights between TWF and ONT. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline flying from TWF to ONT, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT)?
There are no daily nonstop flights from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from TWF to ONT?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) without delays, select a flight that leaves Twin Falls Airport (TWF) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute bookings from TWF to ONT are typically more expensive. To lock in the best prices, start searching for flights well ahead of time. That said, if your travel plans are flexible, you may find a cheap ticket right before your trip.
Is it cheaper to book a TWF to ONT flight and hotel package?
Compared with arranging hotels and flights separately, booking a TWF to ONT flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the hassle out of travel planning. Simply pick your flights and select from our extensive range of hotels, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Twin Falls Airport (TWF) to Los Angeles - Ontario Intl. Airport (ONT)?
Typically, it's possible to reschedule or cancel your TWF to ONT flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Twin Falls
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Delta
Roundtrip price
$361
Distance
605 mi

Book with confidence

Twin Falls to Ontario Flights

The cheapest times to fly from Twin Falls 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 Twin Falls to Ontario are during the month of January. You can find some of the cheapest flights from Twin Falls to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Twin Falls to Ontario

Sunday is one of the best days to book for cheap flights from Twin Falls 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 Twin Falls 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 Twin Falls to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $303 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 Twin Falls 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 Twin Falls 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.

 

Twin Falls to Ontario Flights

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*Available to One Key members.