$374 Cheap Flights from St. Louis (STL) to Watertown (ART)

View $374 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Watertown, NY (ART-Watertown Intl.)

Cheap Flights from St. Louis to Watertown (STL-ART)

Prices were available within the past 7 days and start at $374 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Nov 14 - Sun, Nov 16
STL
St. Louis
ART
Watertown
$238 Roundtrip, found 4 days ago
$238
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Nov 14 from St. Louis to Watertown, returning Sun, Nov 16, priced at $238 found 4 days ago
American Airlines
Sun, Oct 26 - Fri, Dec 12
STL
St. Louis
ART
Watertown
$243 Roundtrip, found 4 days ago
$243
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sun, Oct 26 from St. Louis to Watertown, returning Fri, Dec 12, priced at $243 found 4 days ago
American Airlines
Thu, Nov 20 - Fri, Dec 12
STL
St. Louis
ART
Watertown
$308 Roundtrip, found 6 hours ago
$308
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Thu, Nov 20 from St. Louis to Watertown, returning Fri, Dec 12, priced at $308 found 6 hours ago
American Airlines
Sun, Oct 26 - Fri, Dec 12
STL
St. Louis
ART
Watertown
$313 Roundtrip, found 4 days ago
$313
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sun, Oct 26 from St. Louis to Watertown, returning Fri, Dec 12, priced at $313 found 4 days ago
American Airlines
Wed, Oct 22 - Tue, Oct 28
STL
St. Louis
ART
Watertown
$318 Roundtrip, found 6 days ago
$318
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Oct 22 from St. Louis to Watertown, returning Tue, Oct 28, priced at $318 found 6 days ago
American Airlines
Fri, Nov 14 - Sun, Nov 16
STL
St. Louis
ART
Watertown
$328 Roundtrip, found 4 days ago
$328
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Nov 14 from St. Louis to Watertown, returning Sun, Nov 16, priced at $328 found 4 days ago
American Airlines
Thu, Nov 20 - Fri, Dec 12
STL
St. Louis
ART
Watertown
$334 Roundtrip, found 6 hours ago
$334
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Thu, Nov 20 from St. Louis to Watertown, returning Fri, Dec 12, priced at $334 found 6 hours ago
American Airlines
Thu, Oct 23 - Tue, Dec 9
STL
St. Louis
ART
Watertown
$338 Roundtrip, found 4 days ago
$338
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Oct 23 from St. Louis to Watertown, returning Tue, Dec 9, priced at $338 found 4 days ago
American Airlines
Sat, Oct 18 - Tue, Oct 28
STL
St. Louis
ART
Watertown
$343 Roundtrip, found 6 days ago
$343
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to Watertown, returning Tue, Oct 28, priced at $343 found 6 days ago
American Airlines
Sat, Oct 18 - Sat, Oct 25
STL
St. Louis
ART
Watertown
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to Watertown, returning Sat, Oct 25, priced at $383 found 2 days ago

Alternative airports near Watertown

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Watertown Intl. ART. Cheapest and Closest option available. Average driving time to city center is 9 minutes. Flights from $313
ART
Watertown Intl.
CheapestClosest
Average driving time to city center9 min
Flights from $313

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART) cost?
Snag a cheap one-way flight from $374 or cheap return flight from $238 from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART)?
Traveling in November may help you find better deals, as it's the cheapest month for flights between STL and ART. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from STL to ART. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART)?
You'll have to catch a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to ART?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on various factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART) route, fly before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART) last-minute?
Waiting until right before your break to book a ticket from STL to ART often results in higher prices. While you may come across some last-minute offers, they're not always guaranteed. Be flexible with your travel plans for the best chance of landing a bargain.
Is it cheaper to book a STL to ART flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to ART flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Watertown Intl. Airport (ART)?
It's usually possible to reschedule or cancel your STL to ART flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Watertown Intl.
Airlines serving
American Airlines
Roundtrip price
$238
Distance
825 mi

Book with confidence

St. Louis to Watertown Flights

The cheapest times to fly from St. Louis to Watertown

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Watertown are during the month of November. You can find some of the cheapest flights from St. Louis to Watertown with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Watertown

Sunday is one of the best days to book for cheap flights from St. Louis to Watertown: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Watertown

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $374 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Watertown flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Watertown airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Watertown Flights

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*Available to One Key members.