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CA $250 Cheap Flights from Ontario Intl. Airport (ONT) to Buffalo (BUF)

View CA $250 flight on Sun, Sep 6, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at CA $250 for one-way flights and CA $520 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Aug 31 - Thu, Sep 3
ONT
Ontario
BUF
Buffalo
CA $520 Roundtrip, found 2 days ago
CA $520
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 31 from Ontario to Buffalo, returning Thu, Sep 3, priced at CA $520 found 2 days ago
JetBlue Airways
Fri, Sep 18 - Tue, Sep 22
ONT
Ontario
BUF
Buffalo
CA $537 Roundtrip, found 1 day ago
CA $537
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Sep 18 from Ontario to Buffalo, returning Tue, Sep 22, priced at CA $537 found 1 day ago
JetBlue Airways
Fri, Sep 18 - Tue, Sep 22
ONT
Ontario
BUF
Buffalo
CA $538 Roundtrip, found 1 day ago
CA $538
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Sep 18 from Ontario to Buffalo, returning Tue, Sep 22, priced at CA $538 found 1 day ago
JetBlue Airways
Fri, Sep 18 - Tue, Sep 22
ONT
Ontario
BUF
Buffalo
CA $544 Roundtrip, found 1 day ago
CA $544
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Sep 18 from Ontario to Buffalo, returning Tue, Sep 22, priced at CA $544 found 1 day ago
American Airlines
Mon, Aug 31 - Thu, Sep 3
ONT
Ontario
BUF
Buffalo
CA $569 Roundtrip, found 2 days ago
CA $569
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 31 from Ontario to Buffalo, returning Thu, Sep 3, priced at CA $569 found 2 days ago
American Airlines
Mon, Aug 31 - Thu, Sep 3
ONT
Ontario
BUF
Buffalo
CA $571 Roundtrip, found 2 days ago
CA $571
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 31 from Ontario to Buffalo, returning Thu, Sep 3, priced at CA $571 found 2 days ago
American Airlines
Mon, Aug 31 - Thu, Sep 3
ONT
Ontario
BUF
Buffalo
CA $583 Roundtrip, found 2 days ago
CA $583
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 31 from Ontario to Buffalo, returning Thu, Sep 3, priced at CA $583 found 2 days ago
American Airlines
Mon, Aug 31 - Thu, Sep 3
ONT
Ontario
BUF
Buffalo
CA $593 Roundtrip, found 2 days ago
CA $593
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 31 from Ontario to Buffalo, returning Thu, Sep 3, priced at CA $593 found 2 days ago
Delta
Fri, Sep 18 - Tue, Sep 22
ONT
Ontario
BUF
Buffalo
CA $607 Roundtrip, found 1 day ago
CA $607
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Sep 18 from Ontario to Buffalo, returning Tue, Sep 22, priced at CA $607 found 1 day ago
Alaska Airlines
Fri, Sep 18 - Tue, Sep 22
ONT
Ontario
BUF
Buffalo
CA $992 Roundtrip, found 1 day ago
CA $992
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Sep 18 from Ontario to Buffalo, returning Tue, Sep 22, priced at CA $992 found 1 day ago

Find the cheapest month to fly from Ontario (ONT) to Buffalo (BUF)

February is typically the cheapest month to fly

From CA $277 - CA $620 per traveller.

Frequently asked questions

How much does a flight from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) cost?
You can find one-way and return flights from ONT to BUF with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when ONT to BUF ticket fares go up or down.
What is the cheapest month to fly from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The cheapest months to fly from ONT to BUF are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Enter ONT to BUF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
JetBlue Airways is one of the cheapest airlines offering connecting return flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.), with prices starting from around CA$438 for flights that can be booked for departure within the next year. These flights typically include a layover in John F. Kennedy Intl. (JFK). 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.
How do I find cheap flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
To find a cheap flight from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara 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 Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are approximately 40 connecting flights per day from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.). Some common connection points include Sky Harbor Intl. (PHX), Dallas-Fort Worth Intl. (DFW), and Hartsfield-Jackson Atlanta Intl. (ATL).
What is the earliest flight from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The earliest flight from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) typically departs around 12:55 AM local time. This flight is operated by American Airlines. This is a seasonal service, active in February, March, October, and November. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
You'll typically find the most flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) on a Sunday, with around 27 flights available. This gives you a good selection for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United. Sundays offer notably more flight options compared to other days of the week, so you'll have plenty of choices.
What are the most popular departure times for flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The most popular departure times for flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) are in the morning, from 6am to 9am. Many major carriers, including United, Southwest Airlines and American Airlines, offer flights during this window. Many travellers prefer these times because it allows for an early start to their journey, getting them to their destination with plenty of day left.
How long does it take to fly from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are no nonstop flights from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.). The distance between these two airports is approximately 3489 kilometres. If you're looking for a flight with one stop, you can expect the journey to take around 7 hours 18 minutes. Flights with two or more stops will take longer, typically around 12 hours 18 minutes. Keep in mind that these are average travel times, and your actual flight duration can vary depending on the specific routing and layover times.
Can you fly business or first class from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
You can fly business class or first class between ONT and BUF. You can fly business class with Delta.First class cabins are available on:
  • Alaska Airlines
  • United
  • Delta
  • American Airlines

How do I earn miles on a Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight with Expedia?
It's easy to earn miles on a Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara 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 Buffalo, NY (BUF) from Ontario Intl. Airport (ONT)?
If you're planning to travel to Buffalo from Los Angeles - Ontario Intl. (ONT), you can fly directly into Buffalo Niagara Intl. (BUF). Some flights may connect through major hubs like Denver Intl. (DEN), Sky Harbor Intl. (PHX), or San Francisco Intl. (SFO) before reaching Buffalo. 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 Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) at the last minute?
Typically, booking a last minute flight from Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara 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 Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package?
Securing a Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package 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 Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
If you booked your Ontario Intl. Airport (ONT) to Buffalo, NY (BUF-Buffalo Niagara 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
Ontario Intl. Airport
Destination airport
Buffalo Niagara Intl.
Airlines serving
American Airlines, Delta, JetBlue Airways
Roundtrip price
CA $519
Distance
3467 km

Book with confidence

Los Angeles to Buffalo Flights

The easy way to book your flights from Ontario Intl. Airport to Buffalo 

With Expedia, it’s simple to find and book flights to Buffalo from Ontario Intl. Airport whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Buffalo Niagara Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario Intl. Airport to Buffalo today, tomorrow, or this week.  

 

Save dollars with cheap flights from Ontario Intl. Airport, ONT to Buffalo Niagara Intl., BUF 

Sort your search results by price to find great deals on your flight from Ontario Intl. Airport to Buffalo—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Buffalo from Ontario Intl. Airport currently is just CA $520 rising to CA $992.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Buffalo  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Buffalo from Ontario Intl. Airport 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Buffalo with Expedia today.

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