STL - ART

$638 Find Cheap Flights from St. Louis to Watertown - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$638
Typical prices: $238-$774
American Airlines
Sat 12/22Fri 12/28
STL - ART • 2 stops
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Watertown

Tue, Dec 22 - Mon, Dec 28
American Airlines Logo
8:00 am - 5:14 pmSTL  Lambert-St Louis-ART Watertown
8h 14m2 stops Charlotte Douglas Philadelphia
American Airlines Logo
5:39 pm - 10:42 pmART  Watertown-STL Lambert-St Louis
6h 03m1 stop Philadelphia
$638American Airlines
Tue, Dec 22 - Mon, Dec 28
American Airlines Logo
8:22 pm - 5:14 pmSTL  Lambert-St Louis-ART Watertown
19h 52m2 stops Chicago O'Hare Intl Philadelphia
American Airlines Logo
5:39 pm - 8:29 amART  Watertown-STL Lambert-St Louis
15h 50m2 stops Philadelphia Chicago O'Hare Intl
$688American Airlines
Tue, Dec 22 - Mon, Dec 28
American Airlines Logo
12:19 pm - 5:14 pmSTL  Lambert-St Louis-ART Watertown
27h 55m1 stop Philadelphia
American Airlines Logo
5:39 pm - 10:42 pmART  Watertown-STL Lambert-St Louis
6h 03m1 stop Philadelphia
$877American Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Watertown flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from St. Louis to Watertown?

Round-trip flights from St. Louis to Watertown typically range from $238 to $774. The lowest price found in the past 5 days was $638, on American Airlines.

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Key details for St. Louis to Watertown flights

Cheapest flight

$638
Round-trip flight from St. Louis to Watertown

When to book flights from St. Louis to Watertown

Are your dates flexible? Find out the best times to travel from St. Louis to Watertown based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Watertown flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Watertown?

    Only Economy Class is available on flights from St. Louis to Watertown.

  • Do I need a passport to fly from St. Louis to Watertown?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • Have flight prices from St. Louis to Watertown changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $638 to $877. That means the highest observed fare was about 37% higher than the lowest one.

  • Which airports can I use when flying from St. Louis to Watertown?

    Flights from St. Louis to Watertown usually depart from Lambert-St Louis (STL) and arrive at Watertown (ART).

  • Which airports do connecting flights from St. Louis to Watertown pass through?

    Most connecting flights from St. Louis to Watertown pass through Philadelphia (PHL), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Watertown?

    Yes. Flexible dates can save you up to 70% on flights from St. Louis to Watertown. Tuesday is the cheapest departure day at $238 round-trip on average, while Thursday is the most expensive at $774, a difference of $536.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between St. Louis and Watertown?

    Watertown is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking St. Louis to Watertown flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Thursday. On this route, Tuesday flights average $238, about $536 less than Thursday fares (69% savings) based on the last 12 months.

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