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$338+ Cheap flights from Islip, NY (ISP) to Ottawa (YOW)

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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YOW
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
Thu 12/2512:20 pmISP - YOW
1 stop28h 53mMultiple Airlines
Wed 12/314:20 pmYOW - ISP
1 stop19h 05mMultiple Airlines
Deal found 12/11$609

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$421
(Kiwi.com)

Popular in

October

Cheapest in

May

Average price

$322
Provider with most accurate pricing for Islip Long Island-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Ottawa flights.
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From Islip Long Island to Ottawa
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 2025.
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

Sun 1/25

9:25 am-11:58 pm

1 stop14h 33m

Ottawa

Sun 2/1

7:00 am-8:05 pm

2 stops37h 05m

$338

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

Sat 1/24

11:50 am-11:58 pm

2 stops12h 08m

Ottawa

Sat 1/31

4:20 pm-8:40 am

1 stop16h 20m

$421

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

Thu 12/25

12:20 pm-5:13 pm

1 stop28h 53m

Ottawa

Wed 12/31

4:20 pm-11:25 am

1 stop19h 05m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Compare providers for flights from Islip to Ottawa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Ottawa in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Ottawa flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Ottawa flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Ottawa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Ottawa flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, February is the cheapest month in which you can book a flight from Islip, New York to Ottawa (average of $91). 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, February is the cheapest month in which you can book a flight from Islip, New York to Ottawa (average of $91). 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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