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Cheap flights from Buffalo to Ontario from C$ 251

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ONT
4 May — 11 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Buffalo to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Buffalo to Ontario
Explore the most affordable flight options available from Buffalo to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 April 2026.

Tue 18/84:30 p.m.
BUF
-
ONT
1 stop8h 26m
Delta
Tue 25/810:59 p.m.
ONT
-
BUF
1 stop9h 16m
Delta
Deal found 2/4C$ 512
Sat 25/412:09 p.m.
BUF
-
ONT
1 stop9h 24m
Delta
Mon 27/410:15 p.m.
ONT
-
BUF
1 stop9h 46m
Delta
Deal found 1/4C$ 534
Thu 20/86:16 a.m.
BUF
-
ONT
2 stops14h 45m
Delta
Tue 25/810:59 p.m.
ONT
-
BUF
1 stop9h 16m
Delta
Deal found 2/4C$ 586
Wed 13/511:00 a.m.
BUF
-
ONT
1 stop8h 20m
Southwest
Sun 17/59:55 p.m.
ONT
-
BUF
1 stop6h 55m
Southwest
Deal found 31/3C$ 588
Tue 18/86:16 a.m.
BUF
-
ONT
2 stops14h 45m
Delta
Sun 23/87:00 a.m.
ONT
-
BUF
1 stop8h 43m
Delta
Deal found 2/4C$ 595
Wed 5/85:12 p.m.
BUF
-
ONT
1 stop7h 32m
Delta
Mon 17/812:00 p.m.
ONT
-
BUF
1 stop8h 58m
Delta
Deal found 31/3C$ 623
Wed 19/84:30 p.m.
BUF
-
ONT
1 stop8h 26m
Delta
Tue 25/87:00 a.m.
ONT
-
BUF
1 stop8h 43m
Delta
Deal found 2/4C$ 630
Mon 17/87:40 p.m.
BUF
-
ONT
1 stop25h 21m
Delta
Wed 26/812:00 p.m.
ONT
-
BUF
1 stop8h 58m
Delta
Deal found 2/4C$ 651
Thu 28/54:55 p.m.
BUF
-
ONT
1 stop7h 53m
Delta
Mon 1/610:00 p.m.
ONT
-
BUF
1 stop10h 13m
Delta
Deal found 3/4C$ 652
Tue 18/87:00 a.m.
BUF
-
ONT
2 stops14h 01m
Delta
Sat 29/812:00 p.m.
ONT
-
BUF
1 stop24h 30m
Delta
Deal found 2/4C$ 658

Find flight deals from Buffalo to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 April 2026.

Round-trip from

C$ 512

One-way from

C$ 251

Popular in

December

Cheapest in

October

Average price

C$ 857
Delta
  • Delta
  • 18/8-25/8
  • 2 total stops
  • 17h 42m total
  • Buffalo to Ontario
Search Deals
Frontier
  • Frontier
  • 15/4
  • 2 total stops
  • 29h 42m total
  • Buffalo to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 4 April 2026.
Use the filters below to find and compare flights from Buffalo to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Wed 22/4

11:00 a.m.-4:20 p.m.

1 stop8h 20m

Ontario

Sat 25/4

6:20 a.m.-4:35 p.m.

1 stop7h 15m

C$ 512

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Wed 13/5

9:45 a.m.-4:20 p.m.

1 stop9h 35m

Ontario

Sun 17/5

12:55 p.m.-12:05 a.m.

1 stop8h 10m

C$ 588

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Sat 9/5

3:25 p.m.-9:20 p.m.

1 stop8h 55m

Ontario

Sun 10/5

7:40 p.m.-7:50 a.m.

2 stops9h 10m

C$ 595

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Fri 12/6

4:10 p.m.-8:05 p.m.

1 stop6h 55m

Ontario

Sun 14/6

11:55 p.m.-10:25 a.m.

1 stop7h 30m

C$ 665

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Wed 2/9

12:09 p.m.-6:01 p.m.

1 stop8h 52m

Ontario

Wed 2/9

10:59 p.m.-11:15 a.m.

1 stop9h 16m

C$ 685

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Thu 30/4

5:55 p.m.-10:35 p.m.

1 stop7h 40m

Ontario

Tue 5/5

6:59 p.m.-9:41 a.m.

2 stops11h 42m

C$ 694

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Wed 15/4

10:13 a.m.-9:00 p.m.

2 stops13h 47m

Ontario

Fri 17/4

10:15 p.m.-7:39 p.m.

2 stops18h 24m

C$ 696

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Sat 30/5

6:15 a.m.-10:57 a.m.

1 stop7h 42m

Ontario

Sun 7/6

7:05 a.m.-6:50 p.m.

1 stop8h 45m

C$ 707

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Mon 4/5

5:55 p.m.-10:35 p.m.

1 stop7h 40m

Ontario

Mon 11/5

6:59 p.m.-9:41 a.m.

2 stops11h 42m

C$ 717

BuffaloOntario

BUF - ONT

BUFONT

Buffalo

Thu 6/8

5:12 p.m.-9:44 p.m.

1 stop7h 32m

Ontario

Mon 17/8

12:00 p.m.-11:58 p.m.

1 stop8h 58m

C$ 719

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/3

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Buffalo to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to Ontario

What is the cheapest month to book a flight from Buffalo to Ontario?

Currently, May is the cheapest month in which you can book a flight from Buffalo to Ontario (average of C$ 178). Flying from Buffalo to Ontario in June is currently the most expensive (average of C$ 315). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Buffalo to Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 4 April 2026.
See what other customers who have flown with Southwest from Buffalo to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,343 reviews
Check prices

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,343 reviews
Southwest
8.0
Very good
4,343 reviews
Check prices

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Buffalo to Ontario?

    Southwest and Delta can get you from Buffalo to Ontario in just under 8h 20m. Your travel time can differ by up to 32m. The distance between Buffalo and Ontario is about 3487 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Buffalo to Ontario that include hotel bookings?

    Yes. In addition to deals on Buffalo to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Ontario.

  • Can I find deals for business class flights from Buffalo to Ontario?

    Yes. Cheapflights offers flight deals from Buffalo to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Buffalo to Ontario (average of C$ 178). Flying from Buffalo to Ontario in June is currently the most expensive (average of C$ 315). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Can Cheapflights find flights from Buffalo to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Buffalo to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from Buffalo to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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