In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

How far in advance should I book a flight from Ottawa to Islip, New York?

Find a great deal and save up to 65% by booking at least 50 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ottawa to Islip, New York within the next two weeks, with the cheapest ticket starting at $291.

What is the cheapest month to fly from Ottawa to Islip, New York?

Our data shows that June tends to be the cheapest month to fly to Islip, New York from Ottawa. Users have commonly found prices around $275 for the month, but tickets can be as low as $185. Due to multiple factors, prepare for potentially higher prices in December.

What is the cheapest time of day to fly from YOW to ISP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to Islip, New York as you normally would.

Can I find deals for flights from Ottawa to Islip that include hotel bookings?

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

How can I find direct flights from Ottawa to Islip?

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

Can I find deals for business class flights from Ottawa to Islip?

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

$800+ Flights from Ottawa to Islip, NY

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Cheap flight deals from Ottawa to Islip

Round-trip from	$800 (Kiwi.com)
Popular in	December
Cheapest in	June
Average price	$299

From Ottawa to Islip Long Island

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Highest demand for flights based on searches. 5% potential increase in price ($14 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Ottawa to Islip

Cheapest flights from Ottawa to Islip
Explore the most affordable flight options available from Ottawa to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Sat 8/237:00 amYOW - ISP

2 stops11h 38mMultiple Airlines

Sat 8/3011:53 amISP - YOW

1 stop5h 25mMultiple Airlines

Deal found 7/26

$800

Best flights from Ottawa to Islip
Discover carefully curated flight deals from Ottawa to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Sat 8/237:00 amYOW - ISP

2 stops11h 38mMultiple Airlines

Sat 8/3011:53 amISP - YOW

1 stop5h 25mMultiple Airlines

Deal found 7/26

$800

Last-minute flights from Ottawa to Islip
Discover last-minute flight deals from Ottawa to Islip. Data last updated July 29, 2025 and is based on user searches.

Sat 8/237:00 amYOW - ISP

2 stops11h 38mMultiple Airlines

Sat 8/3011:53 amISP - YOW

1 stop5h 25mMultiple Airlines

Deal found 7/26

$800

Fly from

Fly to

Route

Depart

Return

Price

OttawaIslip

YOW - ISP

YOWISP

Ottawa

Sat 8/23

7:00 am-6:38 pm

2 stops11h 38m

Islip Long Island

Sat 8/30

11:53 am-5:18 pm

1 stop5h 25m

$800

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Best time to book a flight from Ottawa to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Ottawa 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 Ottawa to Islip

What is the cheapest month to book a flight from Ottawa to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Ottawa to Islip, New York (average of $108). Flying from Ottawa to Islip, New York in November is currently the most expensive (average of $213). 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.

Related info for your journey

Can I find deals for flights from Ottawa to Islip that include hotel bookings?
Yes. In addition to deals on Ottawa to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Islip.
Can I find deals for business class flights from Ottawa to Islip?
Yes. Cheapflights offers flight deals from Ottawa to Islip 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 Ottawa to Islip, New York?
Currently, January is the cheapest month in which you can book a flight from Ottawa to Islip, New York (average of $108). Flying from Ottawa to Islip, New York in November is currently the most expensive (average of $213). 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.

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Complete your trip

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$800+ Cheap flights from Ottawa (YOW) to Islip, NY (ISP)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Ottawa to Islip

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Find flight deals from Ottawa to Islip

Cheapest flights from Ottawa to IslipExplore the most affordable flight options available from Ottawa to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Ottawa to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

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Use the filters below to find and compare flights from Ottawa to Islip that are best for you.

Best time to book a flight from Ottawa to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Ottawa with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Islip

What is the cheapest month to book a flight from Ottawa to Islip, New York?

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Islip. 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 Ottawa to Islip that include hotel bookings?

How can I find direct flights from Ottawa to Islip?

Can I find deals for business class flights from Ottawa to Islip?

What is the cheapest month to book a flight from Ottawa to Islip, New York?

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Cheapest flights from Ottawa to Islip
Explore the most affordable flight options available from Ottawa to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.