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$291+ Cheap flights from St. Louis to Watertown, NY (STL - ART)

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ART
Apr 19 — Apr 261
Sun 4/19
Sun 4/26
1 adult, Economy
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Cheap flight deals from St. Louis to Watertown

Cheapest flights from St. Louis to Watertown
Explore the most affordable flight options available from St. Louis to Watertown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.

This American Airlines deal was found by Cheapflights users on 3/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:14 am
STL
-
ART
2 stops9h 25m
American Airlines
Sat 5/306:00 am
ART
-
STL
2 stops10h 18m
American Airlines
Deal found 3/18$291

Find flight deals from St. Louis to Watertown

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Watertown (ART). 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 March 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$291
(American Airlines)
Provider with most accurate pricing for Lambert-St Louis-Watertown flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Watertown flights.
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From Lambert-St Louis to Watertown
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Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Watertown 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 March 20, 2026.
Use the filters below to find and compare flights from St. Louis to Watertown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisWatertown

STL - ART

STLART

Lambert-St Louis

Tue 5/26

5:14 am-3:39 pm

2 stops9h 25m

Watertown

Sat 5/30

6:00 am-10:48 am

1 stop5h 48m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on St. Louis-Watertown, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Watertown, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Watertown, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Watertown, New York flights, Cheapflights users trust FlightHub the most. FlightHub 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 St. Louis-Watertown, New York 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 St. Louis to Watertown

Have a flexible travel schedule? Discover the best time to fly to Watertown from St. Louis 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 St. Louis to Watertown

What is the cheapest month to book a flight from St. Louis to Watertown, New York?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Watertown, New York (average of $198). Flying from St. Louis to Watertown, New York in December is currently the most expensive (average of $316). 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 St. Louis to Watertown. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Watertown, New York?

    Departing from St. Louis to Watertown, New York will take you 9h 25m. Airlines will cover a distance of 825 mi.

  • Can I find deals for flights from St. Louis to Watertown that include hotel bookings?

    Yes. In addition to deals on St. Louis to Watertown flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Watertown?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Watertown.

  • Can I find deals for business class flights from St. Louis to Watertown?

    Yes. Cheapflights offers flight deals from St. Louis to Watertown 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 St. Louis to Watertown, New York?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Watertown, New York (average of $198). Flying from St. Louis to Watertown, New York in December is currently the most expensive (average of $316). 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.

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Traveling to a place near Watertown?

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