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C$ 121+ Cheap flights from Ontario

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — YVR
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Ontario

Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 13 March 2026.

Cheapest one-way flight

C$ 38

Cheapest round-trip flight

C$ 87

Cheapest airline

Frontier

Most popular destination

Vancouver Intl (YVR)

Good round-trip deal

C$ 1,156 or less

Good one-way deal

C$ 171 or less
The cheapest one-way flight from Ontario is currently to Las Vegas Harry Reid Intl.
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The cheapest round-trip flight from Ontario is currently to Vancouver Intl.
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On average, Frontier currently has the cheapest one-way flight from Ontario (avg. price of C$ 146).
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Vancouver Intl (YVR) is currently the most popular flight destination from Ontario (average round-trip price of C$ 224).
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Price to beat on a round-trip flight from Ontario.
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 13 March 2026.

Tue 7/45:09 p.m.
ONT
-
SEA
1 stop6h 54m
Delta
Tue 14/44:36 p.m.
SEA
-
ONT
1 stop7h 08m
Delta
Deal found 8/3C$ 162
Sat 4/411:59 a.m.
ONT
-
SEA
Nonstop2h 56m
Delta
Tue 14/45:35 a.m.
SEA
-
ONT
1 stop6h 39m
Delta
Deal found 9/3C$ 174
Wed 22/45:55 p.m.
ONT
-
SEA
Nonstop3h 00m
Delta
Tue 28/411:10 a.m.
SEA
-
ONT
1 stop5h 15m
Delta
Deal found 10/3C$ 176
Fri 24/47:59 p.m.
ONT
-
SEA
Nonstop2h 51m
Alaska Airlines
Sun 26/47:05 a.m.
SEA
-
ONT
Nonstop2h 40m
Alaska Airlines
Deal found 9/3C$ 186
Sun 5/46:00 a.m.
ONT
-
SEA
Nonstop2h 55m
Delta
Tue 21/47:50 p.m.
SEA
-
ONT
Nonstop2h 47m
Delta
Deal found 11/3C$ 188
Tue 21/47:00 a.m.
ONT
-
SEA
Nonstop3h 07m
Delta
Tue 21/42:30 p.m.
SEA
-
ONT
Nonstop2h 45m
Delta
Deal found 9/3C$ 189
Thu 23/43:00 p.m.
ONT
-
SEA
1 stop5h 05m
Southwest
Mon 27/46:15 p.m.
SEA
-
ONT
1 stop4h 50m
Southwest
Deal found 9/3C$ 199
Sat 25/410:39 a.m.
ONT
-
SEA
Nonstop2h 51m
Alaska Airlines
Thu 30/49:17 p.m.
SEA
-
ONT
Nonstop2h 42m
Alaska Airlines
Deal found 9/3C$ 200
Sun 5/46:00 a.m.
ONT
-
SEA
Nonstop2h 55m
Delta
Sat 18/45:35 a.m.
SEA
-
ONT
1 stop6h 39m
Delta
Deal found 11/3C$ 201
Thu 23/45:05 p.m.
ONT
-
SEA
1 stop6h 54m
Delta
Wed 29/42:30 p.m.
SEA
-
ONT
Nonstop2h 45m
Delta
Deal found 12/3C$ 203
Thu 30/412:40 p.m.
ONT
-
SEA
1 stop7h 25m
Southwest
Fri 1/56:15 p.m.
SEA
-
ONT
1 stop4h 50m
Southwest
Deal found 9/3C$ 205
Thu 2/46:30 p.m.
ONT
-
SEA
1 stop6h 55m
Southwest
Wed 8/45:30 a.m.
SEA
-
ONT
1 stop4h 55m
Southwest
Deal found 9/3C$ 210

Find flights from Ontario within your budget

 
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 13 March 2026. In the last 7 days, Cheapflights users made a total of 629,999 searches

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 22/4

3:45 p.m.-10:55 p.m.

2 stops7h 10m

Seattle/Tacoma Intl

Wed 29/4

8:25 a.m.-2:55 p.m.

1 stop6h 30m

C$ 212
Quickest round-trip

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 8/4

6:00 a.m.-8:54 a.m.

Nonstop2h 54m

Seattle/Tacoma Intl

Wed 15/4

9:24 p.m.-11:59 p.m.

Nonstop2h 35m

C$ 214

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Mon 11/5

4:57 p.m.-10:03 p.m.

1 stop5h 06m

Seattle/Tacoma Intl

Sat 16/5

9:45 a.m.-12:35 p.m.

Nonstop2h 50m

C$ 242

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 22/4

2:59 p.m.-7:53 p.m.

1 stop4h 54m

Seattle/Tacoma Intl

Wed 29/4

7:05 a.m.-9:45 a.m.

Nonstop2h 40m

C$ 246

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 13/5

11:52 a.m.-2:55 p.m.

Nonstop3h 03m

Seattle/Tacoma Intl

Sun 24/5

9:45 a.m.-12:35 p.m.

Nonstop2h 50m

C$ 256

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 9/5

3:26 p.m.-6:17 p.m.

Nonstop2h 51m

Seattle/Tacoma Intl

Sat 16/5

10:17 a.m.-7:08 p.m.

1 stop8h 51m

C$ 260

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 26/4

6:00 a.m.-10:39 a.m.

1 stop4h 39m

Seattle/Tacoma Intl

Sat 2/5

5:05 a.m.-5:52 p.m.

2 stops12h 47m

C$ 298

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 2/5

1:40 p.m.-11:29 p.m.

2 stops9h 49m

Seattle/Tacoma Intl

Sun 10/5

5:00 a.m.-12:22 p.m.

1 stop7h 22m

C$ 343

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 9/4

4:22 p.m.-8:58 p.m.

1 stop4h 36m

Seattle/Tacoma Intl

Fri 24/4

6:30 p.m.-11:48 p.m.

1 stop5h 18m

C$ 370

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 24/4

1:43 p.m.-10:33 p.m.

1 stop8h 50m

Seattle/Tacoma Intl

Tue 28/4

5:00 a.m.-6:02 p.m.

2 stops13h 02m

C$ 404

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario 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.

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

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

Currently, April is the cheapest month in which you can book a flight from Ontario (average of C$ 87). Flying from Ontario in August will prove the most costly (average of C$ 147). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from Ontario?

From Ontario you can expect to find greater availability for the following destinations: Dallas (108 flights per day), Seattle (90 flights per day) and Phoenix (85 flights per day).

Seattle/Tacoma Intl
Seattle/Tacoma Intl
From C$ 313
San Salvador El Salvador Intl
San Salvador El Salvador Intl
From C$ 1,156
Taipei City Taiwan Taoyuan Intl
Taipei City Taiwan Taoyuan Intl
From C$ 1,764
Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From C$ 171

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Las Vegas Harry Reid Intl, with prices starting at C$ 171. Explore other affordable destinations below.

Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From C$ 171
Salt Lake City
Salt Lake City
From C$ 252
Seattle/Tacoma Intl
Seattle/Tacoma Intl
From C$ 313

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Related info for your journey

Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 13 March 2026.

  • What are the most popular destinations to fly to from Ontario?

    This month, the top selected destinations from Ontario are Las Vegas, Dallas/Fort Worth Airport, Denver. Throughout the year, Las Vegas, Dallas/Fort Worth Airport, Denver are some of the top choices made by users flying from Ontario.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as C$ 171 to Las Vegas (prices may vary depending on the airline and departure time). On average, users have booked flights for C$ 750 to fly from Ontario.

  • What is the cheapest premium economy flight from Ontario?

    Options for some of the cheapest premium economy flights from Ontario we have found on Cheapflights are as follows:
    Fly from Ontario to Houston George Bush Intcntl Airport starting at C$ 1,189

  • What is the cheapest first class flight from Ontario?

    If you’re looking to fly first-class from Ontario to anywhere, put Denver on your list as prices start at C$ 2,580 for this destination.

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently April; with August being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Ontario?

    Check out the cheapest flights from Ontario to embark to:
    Travel from Ontario to Vancouver from C$ 388 round trip
    Travel from Ontario to Toronto from C$ 397 round trip
    Travel from Ontario to Calgary from C$ 527 round trip
    Travel from Ontario to Montreal from C$ 899 round trip

  • How does Cheapflights help users find flights from Ontario?

    Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

  • Why should you use Cheapflights to find cheap flight tickets from Ontario?

    Cheapflights helps you find that perfect flight from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from Ontario with no change fees?

    Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

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

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

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario?

Cheapflights helps you find that perfect flight from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

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

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

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