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Cheap flights from St. Louis to Watertown from $385

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Watertown departing on 3/6. 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
0 bags

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Find the cheapest flights from St. Louis to Watertown

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:00 am - 3:41 pm
STL
-
ART
8h 41m
2 stops
American Airlines Logo
6:00 am - 12:44 pm
ART
-
STL
7h 44m
1 stop
$385American Airlines
Fri, Mar 6 - Tue, Mar 10
American Airlines Logo
6:00 am - 3:41 pm
STL
-
ART
8h 41m
2 stops
American Airlines Logo
6:00 am - 5:01 pm
ART
-
STL
12h 01m
2 stops
$390American Airlines
Fri, Mar 6 - Tue, Mar 10
American Airlines Logo
6:00 am - 3:41 pm
STL
-
ART
8h 41m
2 stops
American Airlines Logo
4:01 pm - 11:44 pm
ART
-
STL
8h 43m
2 stops
$399American Airlines
Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
6:00 am - 3:41 pm
STL
-
ART
8h 41m
2 stops
American Airlines Logo
6:00 am - 12:44 pm
ART
-
STL
7h 44m
1 stop
$525American Airlines
Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
6:00 am - 3:41 pm
STL
-
ART
8h 41m
1 stop
American Airlines Logo
6:00 am - 12:44 pm
ART
-
STL
7h 44m
1 stop
$789American Airlines
Fri, Mar 6 - Tue, Mar 10
American Airlines Logo
6:00 am - 10:55 pm
STL
-
ART
15h 55m
1 stop
American Airlines Logo
6:00 am - 12:44 pm
ART
-
STL
7h 44m
1 stop
$922American Airlines
Thu, Mar 5 - Mon, Mar 9

American Airlines flights from St. Louis to Watertown, New York

Our best American Airlines deals on St. Louis to Watertown, New York flight tickets
American Airlines
Mar 6
STL6:00 amLambert-St Louis
8h 41m
2 stops
ART3:41 pmWatertown
Mar 10
ART6:00 amWatertown
7h 44m
1 stop
STL12:44 pmLambert-St Louis
$385
American Airlines
Mar 6
STL6:00 amLambert-St Louis
8h 41m
2 stops
ART3:41 pmWatertown
Mar 10
ART6:00 amWatertown
12h 01m
2 stops
STL5:01 pmLambert-St Louis
$390
American Airlines
Mar 5
STL6:00 amLambert-St Louis
8h 41m
2 stops
ART3:41 pmWatertown
Mar 9
ART4:01 pmWatertown
8h 43m
2 stops
STL11:44 pmLambert-St Louis
$399

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis 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 February 8, 2026.
Use the filters below to find and compare flights from St. Louis to Watertown, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Fri 3/6

6:00 am-3:41 pm

2 stops8h 41m

Watertown

Tue 3/10

6:00 am-12:44 pm

1 stop7h 44m

$385

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Fri 3/6

6:00 am-3:41 pm

2 stops8h 41m

Watertown

Tue 3/10

6:00 am-5:01 pm

2 stops12h 01m

$390

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Thu 3/5

6:00 am-3:41 pm

2 stops8h 41m

Watertown

Mon 3/9

4:01 pm-11:44 pm

2 stops8h 43m

$399

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Thu 3/5

6:00 am-3:41 pm

2 stops8h 41m

Watertown

Mon 3/9

6:00 am-12:44 pm

1 stop7h 44m

$525

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Fri 3/6

6:00 am-3:41 pm

1 stop8h 41m

Watertown

Tue 3/10

6:00 am-12:44 pm

1 stop7h 44m

$789

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Thu 3/5

6:00 am-10:55 pm

1 stop15h 55m

Watertown

Mon 3/9

6:00 am-12:44 pm

1 stop7h 44m

$922

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Watertown, New York

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

Cheap St. Louis to Watertown, New York (STL to ART) flight deals and tips

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

Fastest flight time

8h 41m

Direct flights

None
The fastest flight from St. Louis to Watertown, New York takes 8h 41m
There are no direct flights from St. Louis to Watertown, New York. There are no popular flight routes from St. Louis to Watertown, New York.
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  • How far is Lambert-St Louis to Watertown by plane?

    Watertown is 826.4 mi away from Lambert-St Louis. A reasonable flight in good conditions will take 8h 41m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Watertown Airport?

    Prices for flights from Lambert-St Louis Airport to Watertown Airport refresh daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Watertown Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis 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.

  • How do I get Price Alerts for flights from St. Louis to Watertown, New York?

    Price Alerts will notify you by email when the price for flights to Watertown, New York from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from St. Louis to Watertown, New York with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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 St. Louis to Watertown?

Finding the right flight to Watertown from St. Louis 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 Watertown quick and easy, saving you time and money.

Can I find flights from St. Louis to Watertown with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Watertown from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Watertown?

momondo helps you find the best flight between St. Louis and Watertown 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 St. Louis to Watertown right now. Can momondo alert me if prices change?

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

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1 adult
Tue 3/10
Tue 3/17
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