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Cheap flights from St. Louis to Watertown from $431

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Watertown departing on 6/6. 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
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:03 pm - 10:59 am
STL
-
ART
13h 56m
2 stops
American Airlines Logo
6:00 am - 12:35 pm
ART
-
STL
7h 35m
1 stop
$502American Airlines
Wed, Apr 29 - Sat, May 9
American Airlines Logo
8:03 pm - 10:59 am
STL
-
ART
13h 56m
2 stops
American Airlines Logo
6:00 am - 4:00 pm
ART
-
STL
11h 00m
2 stops
$507American Airlines
Wed, Apr 29 - Sat, May 9
American Airlines Logo
2:33 pm - 11:23 pm
STL
-
ART
7h 50m
2 stops
American Airlines Logo
11:25 am - 10:19 pm
ART
-
STL
11h 54m
2 stops
$554American Airlines
Tue, Apr 28 - Tue, May 12
American Airlines Logo
12:27 pm - 11:23 pm
STL
-
ART
9h 56m
2 stops
American Airlines Logo
11:25 am - 10:19 pm
ART
-
STL
11h 54m
2 stops
$587American Airlines
Thu, Apr 30 - Tue, May 12
American Airlines Logo
4:30 pm - 10:59 am
STL
-
ART
17h 29m
2 stops
American Airlines Logo
11:25 am - 10:19 pm
ART
-
STL
11h 54m
2 stops
$610American Airlines
Mon, Apr 27 - Tue, May 12
American Airlines Logo
8:54 am - 10:59 am
STL
-
ART
25h 05m
2 stops
American Airlines Logo
6:00 am - 12:35 pm
ART
-
STL
7h 35m
1 stop
$617American Airlines
Tue, Apr 28 - Sat, May 9
American Airlines Logo
12:27 pm - 11:28 pm
STL
-
ART
10h 01m
2 stops
American Airlines Logo
6:00 am - 12:35 pm
ART
-
STL
7h 35m
1 stop
$618American Airlines
Sat, May 2 - Sat, May 9
American Airlines Logo
5:51 am - 11:23 pm
STL
-
ART
16h 32m
2 stops
American Airlines Logo
11:25 am - 10:19 pm
ART
-
STL
11h 54m
2 stops
$622American Airlines
Tue, Apr 28 - Sat, May 9
American Airlines Logo
12:27 pm - 11:28 pm
STL
-
ART
10h 01m
2 stops
American Airlines Logo
11:25 am - 7:30 pm
ART
-
STL
9h 05m
2 stops
$623American Airlines
Sat, May 2 - Wed, May 6
American Airlines Logo
8:54 am - 10:59 am
STL
-
ART
25h 05m
2 stops
American Airlines Logo
6:00 am - 12:48 pm
ART
-
STL
7h 48m
1 stop
$629American Airlines
Tue, Apr 28 - Thu, May 7

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 29
STL7:05 amLambert-St Louis
7h 14m
2 stops
ART3:19 pmWatertown
Apr 5
ART4:01 pmWatertown
8h 01m
1 stop
STL11:02 pmLambert-St Louis
$409
American Airlines
Apr 29
STL8:03 pmLambert-St Louis
13h 56m
2 stops
ART10:59 amWatertown
May 9
ART6:00 amWatertown
7h 35m
1 stop
STL12:35 pmLambert-St Louis
$502
American Airlines
Apr 29
STL8:03 pmLambert-St Louis
13h 56m
2 stops
ART10:59 amWatertown
May 9
ART6:00 amWatertown
11h 00m
2 stops
STL4:00 pmLambert-St Louis
$507

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 March 27, 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

Cheapest round-trip

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Wed 4/29

8:03 pm-10:59 am

2 stops13h 56m

Watertown

Sat 5/9

6:00 am-12:35 pm

1 stop7h 35m

$502

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Wed 4/29

8:03 pm-10:59 am

2 stops13h 56m

Watertown

Sat 5/9

6:00 am-4:00 pm

2 stops11h 00m

$507

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Tue 4/28

2:33 pm-11:23 pm

2 stops7h 50m

Watertown

Tue 5/12

11:25 am-10:19 pm

2 stops11h 54m

$554

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Thu 4/30

12:27 pm-11:23 pm

2 stops9h 56m

Watertown

Tue 5/12

11:25 am-10:19 pm

2 stops11h 54m

$587

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Mon 4/27

4:30 pm-10:59 am

2 stops17h 29m

Watertown

Tue 5/12

11:25 am-10:19 pm

2 stops11h 54m

$610

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Tue 4/28

8:54 am-10:59 am

2 stops25h 05m

Watertown

Sat 5/9

6:00 am-12:35 pm

1 stop7h 35m

$617
Quickest round-trip

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Sat 5/2

12:27 pm-11:28 pm

2 stops10h 01m

Watertown

Sat 5/9

6:00 am-12:35 pm

1 stop7h 35m

$618

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Tue 4/28

5:51 am-11:23 pm

2 stops16h 32m

Watertown

Sat 5/9

11:25 am-10:19 pm

2 stops11h 54m

$622

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Sat 5/2

12:27 pm-11:28 pm

2 stops10h 01m

Watertown

Wed 5/6

11:25 am-7:30 pm

2 stops9h 05m

$623

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Tue 4/28

8:54 am-10:59 am

2 stops25h 05m

Watertown

Thu 5/7

6:00 am-12:48 pm

1 stop7h 48m

$629

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Watertown from

How to get the cheapest flight ticket from St. Louis 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 airline that flies from Lambert-St Louis to Watertown?

American Airlines is the most popular carrier operating from Lambert-St Louis to Watertown

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

7h 14m

Direct flights

None
The fastest flight from St. Louis to Watertown, New York takes 7h 14m
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.
Search flight deals

  • 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 7h 14m.

  • 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.

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.

An easier way to manage your Watertown, New York trip

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