$194 Cheap Flights from Buffalo (BUF) to Ontario Intl. Airport (ONT)

View $194 flight on Tue, Aug 11, 2026Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Buffalo to Ontario Intl. Airport (BUF-ONT)

Prices were available within the past 7 days and start at $194 for one-way flights and $387 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Aug 5 - Tue, Aug 11
BUF
Buffalo
ONT
Ontario
$387 Roundtrip, found 8 hours ago
$387
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Wed, Aug 5 from Buffalo to Ontario, returning Tue, Aug 11, priced at $387 found 8 hours ago
Southwest Airlines
Wed, Jul 29 - Wed, Aug 5
BUF
Buffalo
ONT
Ontario
$387 Roundtrip, found 6 days ago
$387
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Jul 29 from Buffalo to Ontario, returning Wed, Aug 5, priced at $387 found 6 days ago
American Airlines
Tue, Jul 28 - Tue, Aug 4
BUF
Buffalo
ONT
Ontario
$390 Roundtrip, found 6 days ago
$390
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jul 28 from Buffalo to Ontario, returning Tue, Aug 4, priced at $390 found 6 days ago
American Airlines
Wed, Aug 5 - Tue, Aug 11
BUF
Buffalo
ONT
Ontario
$392 Roundtrip, found 8 hours ago
$392
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Wed, Aug 5 from Buffalo to Ontario, returning Tue, Aug 11, priced at $392 found 8 hours ago
United
Wed, Jun 17 - Sat, Jun 20
BUF
Buffalo
ONT
Ontario
$393 Roundtrip, found 3 days ago
$393
Roundtrip
found 3 days ago
Select United flight, departing Wed, Jun 17 from Buffalo to Ontario, returning Sat, Jun 20, priced at $393 found 3 days ago
American Airlines
Tue, Jul 28 - Tue, Aug 4
BUF
Buffalo
ONT
Ontario
$395 Roundtrip, found 6 days ago
$395
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jul 28 from Buffalo to Ontario, returning Tue, Aug 4, priced at $395 found 6 days ago
American Airlines
Sat, Aug 1 - Tue, Aug 4
BUF
Buffalo
ONT
Ontario
$397 Roundtrip, found 5 days ago
$397
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Aug 1 from Buffalo to Ontario, returning Tue, Aug 4, priced at $397 found 5 days ago
Southwest Airlines
Wed, Aug 5 - Tue, Aug 11
BUF
Buffalo
ONT
Ontario
$398 Roundtrip, found 8 hours ago
$398
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Wed, Aug 5 from Buffalo to Ontario, returning Tue, Aug 11, priced at $398 found 8 hours ago
Delta
Tue, Aug 25 - Mon, Aug 31
BUF
Buffalo
ONT
Ontario
$403 Roundtrip, found 10 hours ago
$403
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Aug 25 from Buffalo to Ontario, returning Mon, Aug 31, priced at $403 found 10 hours ago
JetBlue Airways
Wed, Sep 2 - Mon, Sep 7
BUF
Buffalo
ONT
Ontario
$463 Roundtrip, found 16 hours ago
$463
Roundtrip
found 16 hours ago
Select JetBlue Airways flight, departing Wed, Sep 2 from Buffalo to Ontario, returning Mon, Sep 7, priced at $463 found 16 hours ago

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 $589
SNA
John Wayne
Average driving time to city center42 min
Flights from $589

Frequently asked questions

How much does a flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) cost?
You can find cheap one-way flights from $194 and cheap return flights from $387 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) with Expedia. One-way flights generally range between $195 and $1847, and roundtrip flights usually range from $378 to $1320. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
August is the cheapest month to fly from Buffalo to Ontario, with average round-trip fares around $310. This is about 27% lower than the average price throughout the year, as travel demand is typically lower during this time. Other cheap months to fly from Buffalo to Ontario include May and November.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Enter BUF to ONT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Frontier Airlines is one of the cheapest airlines offering connecting flights from Buffalo (BUF) to Ontario (ONT) with a layover in Orlando Intl. (MCO), starting from around $219 for a round-trip ticket. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
To find a cheap flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
For flights from Buffalo, NY (BUF) to Ontario, CA (ONT), August and November are the best months to consider. August offers an average price of about $310, making it a cost-effective choice, while November is also popular, providing good flight availability.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The earliest flight from Buffalo Niagara Intl. (BUF) to Los Angeles - Ontario Intl. (ONT) usually departs at around 5:00 AM, operated by American Airlines. This seasonal service is active in December, providing a good option for travelers looking to visit Ontario during this time. An early flight can help you maximize your time in Ontario upon arrival. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The most popular departure times for flights from Buffalo (BUF) to Ontario (ONT) are in the early morning, from 6am to 9am. This time window accounts for around 44% of total traffic. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing is favored because it allows you to arrive in Ontario with a full day ahead of you.
How long does it take to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Flights from BUF to ONT with one stop typically take around 7 hours 30 minutes, covering approximately 2,168 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
You can fly first class between BUF and ONT. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How do I earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight with Expedia?
It's easy to earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Ontario from Buffalo Niagara Intl. (BUF)?
If you're planning to travel to Ontario from Buffalo Niagara Intl. (BUF), you can fly into Los Angeles - Ontario Intl. (ONT) Some flights may connect through major hubs like O'Hare Intl. (ORD), Baltimore Washington Intl. Thurgood Marshall (BWI), Washington Dulles Intl. (IAD) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) at the last minute?
Typically, booking a last minute flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package?
Securing a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) Los Angeles Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you booked your Buffalo, NY (BUF-Buffalo Niagara Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Ontario Intl. Airport
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$386
Distance
2167 mi

Book with confidence

Buffalo to Ontario Intl. Airport Flights

The cheapest times to fly from Buffalo to Ontario Intl. Airport

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

 

The best time to book a flight from Buffalo to Ontario Intl. Airport

Sunday is one of the best days to book for cheap flights from Buffalo to Ontario Intl. Airport: 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 Buffalo to Ontario Intl. Airport

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 Buffalo to Ontario Intl. Airport in 2026. You can also book with separate airlines for your outbound and return journeys, from $194 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 Buffalo to Ontario Intl. Airport 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 Buffalo to Ontario Intl. Airport 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.

 

Buffalo to Ontario Intl. Airport Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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