$139 Cheap Flights from Boston (BOS) to Ontario (ONT)

View $139 flight on Thu, Feb 19, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Boston to Ontario (BOS-ONT)

Prices were available within the past 7 days and start at $139 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Nov 12 - Wed, Nov 19
BOS
Boston
ONT
Ontario
$277 Roundtrip, just found
$277
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Nov 12 from Boston to Ontario, returning Wed, Nov 19, priced at $277 just found
American Airlines
Wed, Oct 29 - Thu, Oct 30
BOS
Boston
ONT
Ontario
$277 Roundtrip, just found
$277
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 29 from Boston to Ontario, returning Thu, Oct 30, priced at $277 just found
United
Wed, Nov 12 - Wed, Nov 19
BOS
Boston
ONT
Ontario
$277 Roundtrip, just found
$277
Roundtrip
just found
Select United flight, departing Wed, Nov 12 from Boston to Ontario, returning Wed, Nov 19, priced at $277 just found
Alaska Airlines
Wed, Nov 12 - Wed, Nov 19
BOS
Boston
ONT
Ontario
$278 Roundtrip, just found
$278
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Nov 12 from Boston to Ontario, returning Wed, Nov 19, priced at $278 just found
Alaska Airlines
Wed, Nov 12 - Wed, Nov 19
BOS
Boston
ONT
Ontario
$279 Roundtrip, just found
$279
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Nov 12 from Boston to Ontario, returning Wed, Nov 19, priced at $279 just found
Southwest Airlines
Wed, Oct 29 - Wed, Nov 5
BOS
Boston
ONT
Ontario
$280 Roundtrip, found 10 hours ago
$280
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, Oct 29 from Boston to Ontario, returning Wed, Nov 5, priced at $280 found 10 hours ago
American Airlines
Fri, Oct 31 - Sat, Nov 1
BOS
Boston
ONT
Ontario
$281 Roundtrip, found 2 days ago
$281
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Oct 31 from Boston to Ontario, returning Sat, Nov 1, priced at $281 found 2 days ago
Southwest Airlines
Wed, Nov 12 - Wed, Nov 19
BOS
Boston
ONT
Ontario
$282 Roundtrip, just found
$282
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Nov 12 from Boston to Ontario, returning Wed, Nov 19, priced at $282 just found
Southwest Airlines
Fri, Oct 31 - Mon, Nov 3
BOS
Boston
ONT
Ontario
$283 Roundtrip, found 2 hours ago
$283
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Fri, Oct 31 from Boston to Ontario, returning Mon, Nov 3, priced at $283 found 2 hours ago
Hawaiian Airlines
Wed, Nov 5 - Fri, Nov 14
BOS
Boston
ONT
Ontario
$286 Roundtrip, found 1 day ago
$286
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Nov 5 from Boston to Ontario, returning Fri, Nov 14, priced at $286 found 1 day ago

Find the cheapest month to fly from Boston (BOS) to Ontario (ONT)

September is typically the cheapest month to fly

From $207 - $383 per traveler.

Alternative airports near Ontario

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

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $473
SNA
John Wayne
Average driving time to city center42 min
Flights from $473

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Snag a cheap one-way flight from $139 or cheap return flight from $277 from Logan Intl. Airport (BOS) 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 Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest month to fly from BOS to ONT is November, when there's less demand. Off-peak months are usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline flying from BOS to ONT, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)?
There aren't any daily nonstop flights from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from BOS to ONT?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline 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 Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)?
To reach Los Angeles - Ontario Intl. Airport (ONT) on time, select a flight that leaves Logan Intl. Airport (BOS) before 3 PM. The chance 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.
What airports do you fly into for Ontario from Logan Intl. Airport (BOS)?
If you're boarding a direct flight from Logan Intl. Airport (BOS) to Ontario, Los Angeles Intl. Airport (LAX) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute fares from BOS to ONT are generally more expensive. For the lowest prices, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, it's possible to find a cheap ticket right before you leave.
Is it cheaper to book a BOS to ONT flight and hotel package?
Opting for a BOS to ONT flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Los Angeles - Ontario Intl. Airport (ONT)?
It's generally possible to cancel or reschedule your BOS to ONT flight. However, for bookings made more than 24 hours ago, 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.

Travel information

Travel information

Origin airport
Logan Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$276
Distance
2559 mi

Book with confidence

Book with confidence

Boston to Ontario Flights

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

 

The best time to book a flight from Boston to Ontario

Sunday is one of the best days to book for cheap flights from Boston 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 Boston 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 Boston to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $139 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 Boston 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 Boston 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.

 

Boston to Ontario Flights

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