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Cheap flights from Islip, New York to Ottawa from $469

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Ottawa departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Ottawa

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:09 pm - 5:04 pmISP  Islip Long Island-YOW Ottawa
21h 55m2 stops Orlando Boston Logan Intl
Multiple Airlines Logo
7:00 am - 4:58 pmYOW  Ottawa-ISP Islip Long Island
9h 58m1 stop Orlando
$469Multiple Airlines
Fri, Sep 4 - Fri, Sep 11
Multiple Airlines Logo
7:09 pm - 2:33 pmISP  Islip Long Island-YOW Ottawa
19h 24m1 stop Orlando
Multiple Airlines Logo
7:00 am - 4:58 pmYOW  Ottawa-ISP Islip Long Island
9h 58m1 stop Orlando
$532Multiple Airlines
Fri, Sep 4 - Fri, Sep 11
Multiple Airlines Logo
5:43 pm - 2:33 pmISP  Islip Long Island-YOW Ottawa
20h 50m1 stop Orlando
Multiple Airlines Logo
7:00 am - 4:58 pmYOW  Ottawa-ISP Islip Long Island
9h 58m2 stops Toronto Pearson Intl Orlando
$556Multiple Airlines
Thu, Sep 24 - Thu, Oct 1
Multiple Airlines Logo
10:57 am - 2:33 pmISP  Islip Long Island-YOW Ottawa
27h 36m1 stop Orlando
Multiple Airlines Logo
7:00 am - 4:58 pmYOW  Ottawa-ISP Islip Long Island
9h 58m2 stops Toronto Pearson Intl Orlando
$592Multiple Airlines
Fri, Sep 4 - Thu, Sep 10
Multiple Airlines Logo
10:57 am - 2:33 pmISP  Islip Long Island-YOW Ottawa
27h 36m1 stop Orlando
Multiple Airlines Logo
2:20 pm - 8:15 pmYOW  Ottawa-ISP Islip Long Island
5h 55m1 stop Boston Logan Intl
$781Multiple Airlines
Fri, Sep 4 - Thu, Sep 10
Multiple Airlines Logo
5:43 pm - 2:33 pmISP  Islip Long Island-YOW Ottawa
20h 50m1 stop Orlando
Multiple Airlines Logo
2:30 pm - 10:30 amYOW  Ottawa-ISP Islip Long Island
20h 00m1 stop Boston Logan Intl
$784Multiple Airlines
Thu, Sep 24 - Thu, Oct 1
Multiple Airlines Logo
7:05 am - 9:52 pmISP  Islip Long Island-YOW Ottawa
14h 47m2 stops Boston Logan Intl Toronto Island
Multiple Airlines Logo
8:00 am - 8:15 pmYOW  Ottawa-ISP Islip Long Island
12h 15m2 stops Toronto Island Boston Logan Intl
$936Multiple Airlines
Fri, Sep 4 - Thu, Sep 10
Multiple Airlines Logo
7:05 am - 12:25 amISP  Islip Long Island-YOW Ottawa
17h 20m2 stops Boston Logan Intl Toronto Pearson Intl
Multiple Airlines Logo
8:55 pm - 6:35 pmYOW  Ottawa-ISP Islip Long Island
21h 40m2 stops Toronto Pearson Intl Boston Logan Intl
$1,078Multiple Airlines
Fri, Sep 4 - Fri, Sep 11

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Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Islip, New York to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

7:09 pm-5:04 pm

2 stops21h 55m

Ottawa

Fri 9/11

7:00 am-4:58 pm

1 stop9h 58m

$469

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

7:09 pm-2:33 pm

1 stop19h 24m

Ottawa

Fri 9/11

7:00 am-4:58 pm

1 stop9h 58m

$532

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Thu 9/24

5:43 pm-2:33 pm

1 stop20h 50m

Ottawa

Thu 10/1

7:00 am-4:58 pm

2 stops9h 58m

$556

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

10:57 am-2:33 pm

1 stop27h 36m

Ottawa

Thu 9/10

7:00 am-4:58 pm

2 stops9h 58m

$592

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

10:57 am-2:33 pm

1 stop27h 36m

Ottawa

Thu 9/10

2:20 pm-8:15 pm

1 stop5h 55m

$781

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Thu 9/24

5:43 pm-2:33 pm

1 stop20h 50m

Ottawa

Thu 10/1

2:30 pm-10:30 am

1 stop20h 00m

$784
Quickest round-trip

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

7:05 am-9:52 pm

2 stops14h 47m

Ottawa

Thu 9/10

8:00 am-8:15 pm

2 stops12h 15m

$936

IslipOttawa

ISP Islip Long Island - YOW Ottawa

ISPYOW

Islip Long Island

Fri 9/4

7:05 am-12:25 am

2 stops17h 20m

Ottawa

Fri 9/11

8:55 pm-6:35 pm

2 stops21h 40m

$1,078

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Ottawa from

How to get the cheapest flight ticket from Islip, New York to Ottawa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Ottawa?

The cheapest day to depart from Islip, New York to Ottawa is on a Friday. Travelers who choose to depart for Ottawa on a Friday will often find tickets for as low as $387. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Monday is $433.

What is the cheapest time of day to depart on your flight to Ottawa?

At noon is the cheapest time of day to fly from Islip, New York to Ottawa when you can find flight prices for as low as $366. Flying to Ottawa at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $436 on average. Flights to Ottawa from Islip, New York in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Islip, New York to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Ottawa according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to Ottawa (ISP to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Ottawa

Fastest flight time

27h 36m

Direct flights

None
The fastest flight from Islip, New York to Ottawa takes 27h 36m
There are no direct flights from Islip, New York to Ottawa. There are no popular flight routes from Islip, New York to Ottawa.
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Frequently asked questions about flying from Islip, New York to Ottawa

  • How far is Islip Long Island to Ottawa by plane?

    The straight-line distance from Islip Long Island to Ottawa is 346.9 mi. By plane, this route typically takes 27h 36m.

  • When did momondo last update prices for flights from Islip Long Island Airport to Ottawa Airport?

    Prices for flights from Islip Long Island Airport to Ottawa Airport refresh daily.

  • How old do you have to be to fly from Islip Long Island Airport to Ottawa Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Pembroke
Petawawa
Perth
Calabogie
Smiths Falls
Prescott
Wakefield

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Ottawa?

Finding the right flight to Ottawa from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ottawa quick and easy, saving you time and money.

Can I find flights from Islip to Ottawa with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Islip to Ottawa flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to Ottawa?

momondo helps you find the best flight between Islip and Ottawa by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Islip to Ottawa right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ottawa, momondo offers a useful price alert feature which will track prices for flights to Ottawa from Islip and alert you when they change.

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