What airlines fly to St. Louis?

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to St. Louis from Watertown, New York according to our data. Delta is the first choice among our users, with 49% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Watertown Airport to Lambert-St Louis Airport?

Prices for flights from Watertown Airport to Lambert-St Louis Airport are updated daily.

How old do you have to be to fly from Watertown Airport to Lambert-St Louis 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 Watertown Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$355 Cheap Flights from Watertown to St. Louis in 2025/26

1 adult

0 bags

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Find the cheapest flights from Watertown, New York to St. Louis

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4:37 pm - 11:32 pmART-STL

7h 55m2 stops

6:38 am - 12:00 pmSTL-ART

4h 22m1 stop

$535American Airlines

Find Deal

Sat, Apr 4 - Tue, Apr 7

4:37 pm - 8:18 pmART-STL

4h 41m1 stop

6:38 am - 12:00 pmSTL-ART

4h 22m1 stop

$573American Airlines

Find Deal

Sat, Apr 4 - Tue, Apr 7

4:37 pm - 11:32 pmART-STL

7h 55m2 stops

11:14 am - 10:29 pmSTL-ART

10h 15m2 stops

$650American Airlines

Find Deal

Sat, Apr 4 - Tue, Apr 7

American Airlines flights from Watertown, New York to St. Louis

Our best American Airlines deals on Watertown, New York to St. Louis flight tickets

American Airlines

Apr 4

ART4:37 pmWatertown

7h 55m

2 stops

STL11:32 pmLambert-St Louis

Apr 7

STL6:38 amLambert-St Louis

4h 22m

1 stop

ART12:00 pmWatertown

$535

Find similar

American Airlines

Apr 4

ART4:37 pmWatertown

4h 41m

1 stop

STL8:18 pmLambert-St Louis

Apr 7

STL6:38 amLambert-St Louis

4h 22m

1 stop

ART12:00 pmWatertown

$573

Find similar

American Airlines

Apr 4

ART4:37 pmWatertown

7h 55m

2 stops

STL11:32 pmLambert-St Louis

Apr 7

STL11:14 amLambert-St Louis

10h 15m

2 stops

ART10:29 pmWatertown

$650

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Watertown, New York to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

WatertownSt. Louis

ART - STL

ARTSTL

Watertown

Sat 4/4

4:37 pm-11:32 pm

2 stops7h 55m

Lambert-St Louis

Tue 4/7

6:38 am-12:00 pm

1 stop4h 22m

$535

WatertownSt. Louis

ART - STL

ARTSTL

Watertown

Sat 4/4

4:37 pm-8:18 pm

1 stop4h 41m

Lambert-St Louis

Tue 4/7

6:38 am-12:00 pm

1 stop4h 22m

$573

WatertownSt. Louis

ART - STL

ARTSTL

Watertown

Sat 4/4

4:37 pm-11:32 pm

2 stops7h 55m

Lambert-St Louis

Tue 4/7

11:14 am-10:29 pm

2 stops10h 15m

$650

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Watertown, New York to St. Louis

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

Prices

Airlines

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Watertown, New York in the morning is the least expensive time of day to depart. momondo users have found prices as low as $368 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $382 per ticket.

When to book flights from Watertown, New York to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Watertown, New York to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Watertown, New York to St. Louis (ART to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Watertown, New York to St. Louis

Direct flights	None

There are no direct flights from Watertown, New York to St. Louis. There are no popular flight routes from Watertown, New York to St. Louis.

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How far is Watertown to Lambert-St Louis by plane?
Lambert-St Louis is 826.4 mi away from Watertown. 4h 41m is a normal flight duration for this route.
When did momondo last update prices for flights from Watertown Airport to Lambert-St Louis Airport?
Prices for flights from Watertown Airport to Lambert-St Louis Airport are updated daily.
How old do you have to be to fly from Watertown Airport to Lambert-St Louis 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 Watertown Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from Watertown to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Watertown to St. Louis for you.

Can I find flights from Watertown to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Watertown with this policy.

How can momondo help me find flights from Watertown to St. Louis?

momondo provides multiple filters to help you find the best flight to St. Louis from Watertown. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Watertown to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Watertown are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.