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Cheap flights from St. Louis to Santiago de los Caballeros from $343

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Santiago de los Caballeros departing on 8/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Santiago de los Caballeros

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:00 am - 8:03 pm
STL
-
STI
14h 03m
1 stop
American Airlines Logo
3:35 pm - 10:40 pm
STI
-
STL
8h 05m
1 stop
$600American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
8:34 am - 8:03 pm
STL
-
STI
10h 29m
2 stops
American Airlines Logo
3:35 pm - 8:24 am
STI
-
STL
17h 49m
2 stops
$605American Airlines
Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
11:35 am - 9:07 pm
STL
-
STI
8h 32m
1 stop
American Airlines Logo
7:00 am - 10:40 pm
STI
-
STL
16h 40m
1 stop
$645American Airlines
Sun, Aug 16 - Sun, Aug 23
American Airlines Logo
5:42 am - 9:07 pm
STL
-
STI
14h 25m
2 stops
American Airlines Logo
7:00 am - 10:40 pm
STI
-
STL
16h 40m
1 stop
$650American Airlines
Sun, Aug 16 - Sun, Aug 23
American Airlines Logo
5:42 am - 9:07 pm
STL
-
STI
14h 25m
2 stops
American Airlines Logo
7:00 am - 11:54 pm
STI
-
STL
17h 54m
2 stops
$708American Airlines
Sun, Aug 16 - Sun, Aug 23
American Airlines Logo
5:42 am - 9:07 pm
STL
-
STI
14h 25m
2 stops
American Airlines Logo
7:00 am - 11:54 pm
STI
-
STL
17h 54m
2 stops
$737American Airlines
Sun, Aug 16 - Sun, Aug 23
United Airlines Logo
12:28 pm - 10:52 pm
STL
-
STI
9h 24m
1 stop
United Airlines Logo
6:00 am - 9:09 pm
STI
-
STL
16h 09m
1 stop
$754United Airlines
Tue, Sep 22 - Thu, Sep 24
United Airlines Logo
9:43 am - 10:52 pm
STL
-
STI
12h 09m
2 stops
United Airlines Logo
6:00 am - 9:09 pm
STI
-
STL
16h 09m
1 stop
$759United Airlines
Tue, Sep 22 - Thu, Sep 24
United Airlines Logo
7:00 am - 3:12 pm
STL
-
STI
7h 12m
1 stop
United Airlines Logo
2:07 pm - 11:38 pm
STI
-
STL
10h 31m
1 stop
$764United Airlines
Mon, Aug 31 - Thu, Sep 3
United Airlines Logo
8:00 am - 10:52 pm
STL
-
STI
13h 52m
2 stops
United Airlines Logo
4:23 pm - 12:13 pm
STI
-
STL
20h 50m
2 stops
$769United Airlines
Tue, Sep 22 - Thu, Sep 24

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United Airlines flights from St. Louis to Santiago de los Caballeros

Our best United Airlines deals on St. Louis to Santiago de los Caballeros flight tickets
United Airlines
Sep 22
STL12:28 pmLambert-St Louis
9h 24m
1 stop
STI10:52 pmSantiago de los Caballeros
Sep 24
STI6:00 amSantiago de los Caballeros
16h 09m
1 stop
STL9:09 pmLambert-St Louis
$754
United Airlines
Sep 22
STL9:43 amLambert-St Louis
12h 09m
2 stops
STI10:52 pmSantiago de los Caballeros
Sep 24
STI6:00 amSantiago de los Caballeros
16h 09m
1 stop
STL9:09 pmLambert-St Louis
$759
United Airlines
Aug 31
STL7:00 amLambert-St Louis
7h 12m
1 stop
STI3:12 pmSantiago de los Caballeros
Sep 3
STI2:07 pmSantiago de los Caballeros
10h 31m
1 stop
STL11:38 pmLambert-St Louis
$764

American Airlines flights from St. Louis to Santiago de los Caballeros

Our best American Airlines deals on St. Louis to Santiago de los Caballeros flight tickets
American Airlines
Aug 11
STL5:00 amLambert-St Louis
14h 03m
1 stop
STI8:03 pmSantiago de los Caballeros
Aug 18
STI3:35 pmSantiago de los Caballeros
8h 05m
1 stop
STL10:40 pmLambert-St Louis
$600
American Airlines
Aug 11
STL8:34 amLambert-St Louis
10h 29m
2 stops
STI8:03 pmSantiago de los Caballeros
Aug 18
STI3:35 pmSantiago de los Caballeros
17h 49m
2 stops
STL8:24 amLambert-St Louis
$605
American Airlines
Aug 16
STL11:35 amLambert-St Louis
8h 32m
1 stop
STI9:07 pmSantiago de los Caballeros
Aug 23
STI7:00 amSantiago de los Caballeros
16h 40m
1 stop
STL10:40 pmLambert-St Louis
$645

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Santiago de los Caballeros 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, momondo users made 832,500 searches. Data last updated July 5, 2026.
Use the filters below to find and compare flights from St. Louis to Santiago de los Caballeros that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 8/11

5:00 am-8:03 pm

1 stop14h 03m

Santiago de los Caballeros

Tue 8/18

3:35 pm-10:40 pm

1 stop8h 05m

$600

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 8/11

8:34 am-8:03 pm

2 stops10h 29m

Santiago de los Caballeros

Tue 8/18

3:35 pm-8:24 am

2 stops17h 49m

$605

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 8/16

11:35 am-9:07 pm

1 stop8h 32m

Santiago de los Caballeros

Sun 8/23

7:00 am-10:40 pm

1 stop16h 40m

$645

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 8/16

5:42 am-9:07 pm

2 stops14h 25m

Santiago de los Caballeros

Sun 8/23

7:00 am-10:40 pm

1 stop16h 40m

$650

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 8/16

5:42 am-9:07 pm

2 stops14h 25m

Santiago de los Caballeros

Sun 8/23

7:00 am-11:54 pm

2 stops17h 54m

$708

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 8/16

5:42 am-9:07 pm

2 stops14h 25m

Santiago de los Caballeros

Sun 8/23

7:00 am-11:54 pm

2 stops17h 54m

$737

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 9/22

12:28 pm-10:52 pm

1 stop9h 24m

Santiago de los Caballeros

Thu 9/24

6:00 am-9:09 pm

1 stop16h 09m

$754

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 9/22

9:43 am-10:52 pm

2 stops12h 09m

Santiago de los Caballeros

Thu 9/24

6:00 am-9:09 pm

1 stop16h 09m

$759
Quickest round-trip

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Mon 8/31

7:00 am-3:12 pm

1 stop7h 12m

Santiago de los Caballeros

Thu 9/3

2:07 pm-11:38 pm

1 stop10h 31m

$764

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Tue 9/22

8:00 am-10:52 pm

2 stops13h 52m

Santiago de los Caballeros

Thu 9/24

4:23 pm-12:13 pm

2 stops20h 50m

$769

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Santiago de los Caballeros

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

Can stopping save me money on St. Louis to Santiago de los Caballeros flights?

You could potentially save up to 33% on your flight if you consider stops on a St. Louis to Santiago de los Caballeros flight.

When to book flights from St. Louis to Santiago de los Caballeros

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Santiago de los Caballeros according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Santiago de los Caballeros (STL to STI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Santiago de los Caballeros

Fastest flight time

9h 24m

Direct flights

None
The fastest flight from St. Louis to Santiago de los Caballeros takes 9h 24m
There are no direct flights from St. Louis to Santiago de los Caballeros. There are no popular flight routes from St. Louis to Santiago de los Caballeros.
Search flight deals

Frequently asked questions about flying from St. Louis to Santiago de los Caballeros

  • How far is Lambert-St Louis to Santiago de los Caballeros by plane?

    The distance between Lambert-St Louis and Santiago de los Caballeros is about 1763.6 mi. Typically, this will take 9h 24m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Santiago de los Caballeros Airport?

    Prices for flights from Lambert-St Louis Airport to Santiago de los Caballeros Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Santiago de los Caballeros Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Santiago de los Caballeros Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Santiago de los Caballeros Airport.

  • What documentation or ID do you need to fly to Santiago de los Caballeros Airport?

    The travel and health documents you'll need for your trip to Santiago de los Caballeros Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Santiago de los Caballeros Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Santiago de los Caballeros?

Best airlines flying from St. Louis to Santiago de los Caballeros

Compare and see reviews for airlines that fly from St. Louis to Santiago de los Caballeros with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $538Free CancellationRating
7.4
9,933 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Santiago de los Caballeros?

Finding the right flight to Santiago de los Caballeros from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Santiago de los Caballeros quick and easy, saving you time and money.

Can I find flights from St. Louis to Santiago de los Caballeros with flexible booking policies on momondo?

Flights from St. Louis to Santiago de los Caballeros with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Santiago de los Caballeros?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Santiago de los Caballeros from St. Louis.

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

If you are not ready to book a flight from St. Louis to Santiago de los Caballeros now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Santiago de los Caballeros and let you know when they change.

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