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$231+ Cheap flights from Islip, NY (ISP) to Ottawa (YOW)

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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YOW
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Islip to Ottawa

Cheapest flights from Islip to Ottawa
Explore the most affordable flight options available from Islip to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/233:59 pm
ISP
-
YOW
1 stop25h 14m
Multiple Airlines
Mon 3/25:40 am
YOW
-
ISP
2 stops19h 13m
Multiple Airlines
Deal found 1/26$455

Find flight deals from Islip to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Ottawa (YOW). 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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$455
(Kiwi.com)

One-way from

$231
(Trip.com)

Popular in

October

Cheapest in

May

Average price

$326
Provider with most accurate pricing for New York (NYC)-Ottawa flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Ottawa flights.
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From Islip Long Island to Ottawa
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One-way flight from Islip Long Island to Ottawa
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Highest demand for flights based on searches. 14% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Ottawa 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 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from Islip to Ottawa that are best for you.

Fly from

Islip

Fly to

Ottawa

Route

Depart

Return

Price

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

Mon 2/23

3:59 pm-5:13 pm

1 stop25h 14m

Ottawa

Mon 3/2

5:40 am-12:53 am

2 stops19h 13m

$455

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

Fri 3/13

8:25 pm-5:25 pm

1 stop21h 00m

$231

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Best time to book a flight from Islip to Ottawa

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

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

Currently, June is the cheapest month in which you can book a flight from Islip, New York to Ottawa (average of $94). Flying from Islip, New York to Ottawa in October is currently the most expensive (average of $133). 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

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

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

  • How can I find direct flights from Islip to Ottawa?

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

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

    Yes. Cheapflights offers flight deals from Islip to Ottawa 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 Islip, New York to Ottawa?

    Currently, June is the cheapest month in which you can book a flight from Islip, New York to Ottawa (average of $94). Flying from Islip, New York to Ottawa in October is currently the most expensive (average of $133). 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

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Petawawa

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