How far in advance should I book a flight from Ontario to St. John's, Saint John?

To save on the cost of your flight from Ontario to St. John's, Saint John, book at least 35 days before your planned departure. Booking around this time can save you about 165% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $944 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,309.

What is the cheapest month to fly from Ontario to St. John's, Saint John?

August is one of the best times of the year to fly to St. John's, Saint John from Ontario. Prices for August average $831 per person but you can even find prices for as low as $531. The most expensive prices can be found in the month of December. Opting for a August flight can save you 17% on your journey compared to booking in December

What is the cheapest time of day to fly from ONT to ANU?

When flying from Ontario to St. John's, Saint John, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Ontario to St. John's that include hotel bookings?

Yes. In addition to deals on Ontario to St. John's flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to St. John's?

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

Can I find deals for business class flights from Ontario to St. John's?

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

$688+ Flights from Ontario to St. John's

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Cheap flight deals from Ontario to St. John's

Round-trip from	$805 (American Airlines)
One-way from	$688 (JetBlue)
Popular in	December
Cheapest in	August
Average price	$843

From Ontario to St. John's V.C. Bird Intl

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One-way flight from Ontario to St. John's V.C. Bird Intl

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Highest demand for flights based on searches. 6% potential increase in price ($55 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Find flight deals from Ontario to St. John's

Cheapest flights from Ontario to St. John's
Explore the most affordable flight options available from Ontario to St. John's. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Sun 7/2712:55 pmONT - ANU

2 stops21h 50mAmerican Airlines

Sun 8/312:55 pmANU - ONT

2 stops24h 06mAmerican Airlines

Deal found 6/12

$805

Best flights from Ontario to St. John's
Discover carefully curated flight deals from Ontario to St. John's that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Sun 7/2712:55 pmONT - ANU

2 stops21h 50mAmerican Airlines

Sun 8/312:55 pmANU - ONT

2 stops24h 06mAmerican Airlines

Deal found 6/12

$805

Last-minute flights from Ontario to St. John's
Discover last-minute flight deals from Ontario to St. John's. Data last updated June 12, 2025 and is based on user searches.

Sun 7/2712:55 pmONT - ANU

2 stops21h 50mAmerican Airlines

Sun 8/312:55 pmANU - ONT

2 stops24h 06mAmerican Airlines

Deal found 6/12

$805

One-way flights from Ontario to St. John's
Search for one-way flight options from Ontario to St. John's. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Sat 6/2111:59 pmONT - ANU

1 stop11h 51mJetBlue

Deal found 6/12

$688

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to St. John's that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSt. John's

ONT - ANU

ONTANU

Ontario

Sun 7/27

12:55 pm-1:45 pm

2 stops21h 50m

St. John's V.C. Bird Intl

Sun 8/3

12:55 pm-10:01 am

2 stops24h 06m

$805

OntarioSt. John's

ONT - ANU

ONTANU

Ontario

Sat 6/21

11:59 pm-2:50 pm

1 stop11h 51m

$688

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Best time to book a flight from Ontario to St. John's

Have a flexible travel schedule? Discover the best time to fly to St. John's 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to St. John's

What is the cheapest month to book a flight from Ontario to St. John's, Saint John?

Currently, August is the cheapest month in which you can book a flight from Ontario to St. John's, Saint John (average of $500). Flying from Ontario to St. John's, Saint John in June is currently the most expensive (average of $651). 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.

Reviews of airlines servicing St. John's

JetBlue

7.3

Good

2,925 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

JetBlue

7.3

Good

2,925 reviews

JetBlue

7.3

Good

2,925 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

American Airlines

7.2

Good

10,000 reviews

JetBlue

7.3

Good

2,925 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Related info for your journey

Can I find deals for flights from Ontario to St. John's that include hotel bookings?
Yes. In addition to deals on Ontario to St. John's flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to St. John's?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to St. John's.
Can I find deals for business class flights from Ontario to St. John's?
Yes. Cheapflights offers flight deals from Ontario to St. John's 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 Ontario to St. John's, Saint John?
Currently, August is the cheapest month in which you can book a flight from Ontario to St. John's, Saint John (average of $500). Flying from Ontario to St. John's, Saint John in June is currently the most expensive (average of $651). 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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$688+ Cheap flights from Ontario (ONT) to St. John's (ANU)

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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to St. John's with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to St. John's

Round-trip from

One-way from

Popular in

Cheapest in

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Find flight deals from Ontario to St. John's

Cheapest flights from Ontario to St. John'sExplore the most affordable flight options available from Ontario to St. John's. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from Ontario to St. John's. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to St. John's that are best for you.

Best time to book a flight from Ontario to St. John's

Have a flexible travel schedule? Discover the best time to fly to St. John's from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to St. John's

What is the cheapest month to book a flight from Ontario to St. John's, Saint John?

Reviews of airlines servicing St. John's

Related info for your journey

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

Can I find deals for flights from Ontario to St. John's that include hotel bookings?

How can I find direct flights from Ontario to St. John's?

Can I find deals for business class flights from Ontario to St. John's?

What is the cheapest month to book a flight from Ontario to St. John's, Saint John?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to St. John's

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Cheapest flights from Ontario to St. John's
Explore the most affordable flight options available from Ontario to St. John's. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.