United States
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STL - ART

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1 adult
1 adult, Economy, 0 bags

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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

Multiple Airlines Logo
STL  St. Louis Lambert Airport-ART Watertown
825 mimulti-stop
Multiple Airlines Logo
ART  Watertown-STL St. Louis Lambert Airport
825 mimulti-stop
Multiple Airlines
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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.

What is the cheapest layover airport when flying from St. Louis to Watertown?

Flights via Philadelphia (PHL) offer the most affordable fares, with an average round-trip price of $434. Based on KAYAK data over the past 3 months.

When flying from St. Louis to Watertown which airport offers the shortest layover?

Philadelphia (PHL) had the shortest average connection time for St. Louis to Watertown layovers at 4h 25m over the past 3 months.

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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.

  • 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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