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Cheap flights from Ontario to Watertown from $772

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Watertown departing on 10/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Watertown

Cheap round-trip flights

American Airlines Logo
10:09 am - 10:33 pmONT-ART
9h 24m2 stops
American Airlines Logo
6:00 am - 4:00 pmART-ONT
13h 00m2 stops
$772American Airlines
Find Deal
Wed, Oct 8 - Mon, Oct 13
American Airlines Logo
2:51 pm - 3:08 pmONT-ART
21h 17m2 stops
American Airlines Logo
6:00 am - 4:03 pmART-ONT
13h 03m2 stops
$804American Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 4
American Airlines Logo
8:15 am - 10:33 pmONT-ART
11h 18m3 stops
American Airlines Logo
2:45 pm - 9:49 pmART-ONT
10h 04m2 stops
$1,106American Airlines
Find Deal
Wed, Oct 8 - Mon, Oct 13

American Airlines flights from Ontario to Watertown, New York

Our best American Airlines deals on Ontario to Watertown, New York flight tickets
American Airlines
Sep 19
ONT6:10 amOntario
13h 40m
2 stops
ART10:50 pmWatertown
Sep 21
ART6:00 amWatertown
10h 19m
2 stops
ONT1:19 pmOntario
$625
Find similar
American Airlines
Oct 8
ONT10:09 amOntario
9h 24m
2 stops
ART10:33 pmWatertown
Oct 13
ART6:00 amWatertown
13h 00m
2 stops
ONT4:00 pmOntario
$772
Find similar
American Airlines
Nov 1
ONT2:51 pmOntario
21h 17m
2 stops
ART3:08 pmWatertown
Nov 4
ART6:00 amWatertown
13h 03m
2 stops
ONT4:03 pmOntario
$804
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Watertown, New York 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 September 17, 2025.
Use the filters below to find and compare flights from Ontario to Watertown, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioWatertown

ONT - ART

ONTART

Ontario

Wed 10/8

10:09 am-10:33 pm

2 stops9h 24m

Watertown

Mon 10/13

6:00 am-4:00 pm

2 stops13h 00m

$772

OntarioWatertown

ONT - ART

ONTART

Ontario

Sat 11/1

2:51 pm-3:08 pm

2 stops21h 17m

Watertown

Tue 11/4

6:00 am-4:03 pm

2 stops13h 03m

$804

OntarioWatertown

ONT - ART

ONTART

Ontario

Wed 10/8

8:15 am-10:33 pm

3 stops11h 18m

Watertown

Mon 10/13

2:45 pm-9:49 pm

2 stops10h 04m

$1,106

OntarioWatertown

ONT - ART

ONTART

Ontario

Mon 10/6

6:00 am-10:56 pm

2 stops13h 56m

$834

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Ontario to Watertown, New York

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 Watertown, New York?

The cheapest day to depart on your flight to Watertown, New York is on a Friday when prices can be found for as low as $399. This is often the case because there is less demand to fly during this day of the week. Flights from Ontario to Watertown, New York on a Saturday will generally be more expensive and average around $741. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Watertown, New York?

Flying to Watertown, New York from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $384 when looking at flights departing in the evening. Flights in the morning are often more expensive with an average ticket price of $512.

When to book flights from Ontario to Watertown, New York

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

Cheap Ontario to Watertown, New York (ONT to ART) flight deals and tips

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

Direct flights

None
There are no direct flights from Ontario to Watertown, New York. There are no popular flight routes from Ontario to Watertown, New York.
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  • How far is Ontario to Watertown by plane?

    Ontario and Watertown are 2314.0 mi apart from one another. By plane, this route typically takes 9h 24m.

  • When did momondo last update prices for flights from Ontario Airport to Watertown Airport?

    Prices for flights from Ontario Airport to Watertown Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Ontario Airport to Watertown 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 Ontario Airport to Watertown Airport.

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

    The required travel and health documents for your Watertown 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 Watertown Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Watertown?

Book flights to Watertown if you plan to visit one of these locations
Alexandria Bay
Clayton

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Watertown?

It is quick and easy to find Ontario to Watertown flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Watertown that suits you.

Can I find flights from Ontario to Watertown with flexible booking policies on momondo?

Flights from Ontario to Watertown with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Watertown?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Watertown from Ontario.

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

Yes momondo offers price alerts on flights to Watertown from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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