$234 Cheap Flights from Ontario (ONT) to Butte (BTM)

View $234 flight on Sun, Jan 18, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Butte, MT (BTM-Bert Mooney)

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Cheap Flights from Ontario to Butte (ONT-BTM)

Prices were available within the past 7 days and start at $234 for one-way flights and $254 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jan 20 - Sat, Jan 24
ONT
Ontario
BTM
Butte
$254 Roundtrip, found 4 days ago
$254
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Jan 20 from Ontario to Butte, returning Sat, Jan 24, priced at $254 found 4 days ago
Delta
Wed, Dec 17 - Sun, Dec 28
ONT
Ontario
BTM
Butte
$269 Roundtrip, found 3 days ago
$269
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 17 from Ontario to Butte, returning Sun, Dec 28, priced at $269 found 3 days ago
Delta
Fri, Jan 16 - Sun, Jan 18
ONT
Ontario
BTM
Butte
$278 Roundtrip, found 4 days ago
$278
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Jan 16 from Ontario to Butte, returning Sun, Jan 18, priced at $278 found 4 days ago
Delta
Tue, Jan 20 - Fri, Jan 23
ONT
Ontario
BTM
Butte
$283 Roundtrip, found 4 days ago
$283
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Jan 20 from Ontario to Butte, returning Fri, Jan 23, priced at $283 found 4 days ago
Delta
Fri, Jan 30 - Sat, Feb 14
ONT
Ontario
BTM
Butte
$288 Roundtrip, found 5 days ago
$288
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Jan 30 from Ontario to Butte, returning Sat, Feb 14, priced at $288 found 5 days ago
Delta
Tue, Dec 16 - Fri, Dec 26
ONT
Ontario
BTM
Butte
$299 Roundtrip, found 9 hours ago
$299
Roundtrip
found 9 hours ago
Select Delta flight, departing Tue, Dec 16 from Ontario to Butte, returning Fri, Dec 26, priced at $299 found 9 hours ago
Delta
Fri, Jan 16 - Sat, Jan 31
ONT
Ontario
BTM
Butte
$303 Roundtrip, found 5 days ago
$303
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Jan 16 from Ontario to Butte, returning Sat, Jan 31, priced at $303 found 5 days ago
Delta
Sat, Dec 13 - Wed, Dec 24
ONT
Ontario
BTM
Butte
$314 Roundtrip, found 9 hours ago
$314
Roundtrip
found 9 hours ago
Select Delta flight, departing Sat, Dec 13 from Ontario to Butte, returning Wed, Dec 24, priced at $314 found 9 hours ago
Delta
Wed, Dec 17 - Sun, Dec 28
ONT
Ontario
BTM
Butte
$339 Roundtrip, found 3 days ago
$339
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 17 from Ontario to Butte, returning Sun, Dec 28, priced at $339 found 3 days ago
United
Sat, Jan 17 - Tue, Jan 20
ONT
Ontario
BTM
Butte
$381 Roundtrip, found 4 days ago
$381
Roundtrip
found 4 days ago
Select United flight, departing Sat, Jan 17 from Ontario to Butte, returning Tue, Jan 20, priced at $381 found 4 days ago

Alternative airports near Butte

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

Select flight to Bert Mooney BTM. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $611
BTM
Bert Mooney
CheapestClosest
Average driving time to city center8 min
Flights from $611
Flights from Ontario (ONT) to Butte (BTM)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Bert Mooney
Airlines serving
Delta, United
Roundtrip price
$254
Distance
864 mi

Ontario to Butte Flights

The cheapest times to fly from Ontario to Butte

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

 

The best time to book a flight from Ontario to Butte

Sunday is one of the best days to book for cheap flights from Ontario to Butte: 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 Ontario to Butte

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 Ontario to Butte in 2026. You can also book with separate airlines for your outbound and return journeys, from $234 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 Ontario to Butte 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 Ontario to Butte 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.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM) cost?
Lock in a cheap one-way flight from $234 or cheap return flight from $254 from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM) 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 Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM)?
The cheapest month to fly from ONT to BTM is January, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll take you from ONT to BTM. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM)?
You'll need to take a flight with a layover if you're traveling from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from ONT to BTM?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change based on a number of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM)?
Select a flight from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour are on average 22% more likely to be canceled.**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 Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM) last-minute?
Waiting until right before your break to book a ticket from ONT to BTM generally means paying more. While you might find some last-minute discounts, they aren't always guaranteed. Be flexible with your itinerary for the best chance of scoring a bargain.
Is it cheaper to book an ONT to BTM flight and hotel package?
Compared with arranging flights and hotels separately, booking an ONT to BTM flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place takes the hassle out of planning your trip. Just secure your flights and choose from our wide range of stays, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Bert Mooney Airport (BTM)?
You can usually reschedule or cancel your ONT to BTM 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 allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.