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Cheap flights from St. Louis to Santiago de los Caballeros from $195

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 4/29. 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

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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.
Multiple Airlines Logo
6:55 pm - 3:20 pm
STL
-
STI
19h 25m
2 stops
Multiple Airlines Logo
3:07 pm - 8:55 am
STI
-
STL
18h 48m
2 stops
$472Multiple Airlines
Sun, May 10 - Sun, May 17
American Airlines Logo
11:15 am - 9:13 pm
STL
-
STI
8h 58m
1 stop
American Airlines Logo
1:21 pm - 11:59 pm
STI
-
STL
11h 38m
1 stop
$589American Airlines
Thu, Jun 4 - Tue, Jun 9
American Airlines Logo
6:15 am - 9:13 pm
STL
-
STI
13h 58m
2 stops
American Airlines Logo
9:06 am - 11:44 pm
STI
-
STL
15h 38m
2 stops
$593American Airlines
Thu, May 28 - Tue, Jun 2
American Airlines Logo
5:15 am - 9:13 pm
STL
-
STI
14h 58m
1 stop
American Airlines Logo
9:06 am - 10:58 pm
STI
-
STL
14h 52m
1 stop
$609American Airlines
Thu, May 28 - Tue, Jun 2
American Airlines Logo
5:08 am - 9:13 pm
STL
-
STI
15h 05m
2 stops
American Airlines Logo
1:21 pm - 11:59 pm
STI
-
STL
11h 38m
1 stop
$613American Airlines
Thu, May 28 - Tue, Jun 2
American Airlines Logo
5:24 am - 12:23 pm
STL
-
STI
5h 59m
1 stop
American Airlines Logo
1:32 pm - 10:24 pm
STI
-
STL
9h 52m
1 stop
$619American Airlines
Thu, May 14 - Mon, May 18
American Airlines Logo
5:24 am - 12:23 pm
STL
-
STI
5h 59m
1 stop
American Airlines Logo
1:32 pm - 9:25 am
STI
-
STL
20h 53m
2 stops
$623American Airlines
Thu, May 14 - Mon, May 18
American Airlines Logo
5:24 am - 12:23 pm
STL
-
STI
5h 59m
1 stop
American Airlines Logo
1:32 pm - 10:24 pm
STI
-
STL
9h 52m
1 stop
$624American Airlines
Sun, May 10 - Sun, May 17
American Airlines Logo
5:24 am - 12:23 pm
STL
-
STI
5h 59m
1 stop
American Airlines Logo
1:32 pm - 8:30 am
STI
-
STL
19h 58m
2 stops
$628American Airlines
Sun, May 10 - Sun, May 17
American Airlines Logo
5:15 am - 9:13 pm
STL
-
STI
14h 58m
1 stop
American Airlines Logo
1:21 pm - 11:59 pm
STI
-
STL
11h 38m
1 stop
$629American Airlines
Thu, May 28 - Tue, Jun 2

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
Jun 4
STL11:15 amLambert-St Louis
8h 58m
1 stop
STI9:13 pmSantiago de los Caballeros
Jun 9
STI1:21 pmSantiago de los Caballeros
11h 38m
1 stop
STL11:59 pmLambert-St Louis
$589
American Airlines
May 28
STL6:15 amLambert-St Louis
13h 58m
2 stops
STI9:13 pmSantiago de los Caballeros
Jun 2
STI9:06 amSantiago de los Caballeros
15h 38m
2 stops
STL11:44 pmLambert-St Louis
$593
American Airlines
May 28
STL5:15 amLambert-St Louis
14h 58m
1 stop
STI9:13 pmSantiago de los Caballeros
Jun 2
STI9:06 amSantiago de los Caballeros
14h 52m
1 stop
STL10:58 pmLambert-St Louis
$609

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
Apr 20
STL9:10 amLambert-St Louis
12h 42m
2 stops
STI10:52 pmSantiago de los Caballeros
Apr 24
STI4:23 pmSantiago de los Caballeros
20h 59m
2 stops
STL12:22 pmLambert-St Louis
$808
United Airlines
May 9
STL7:11 pmLambert-St Louis
19h 01m
2 stops
STI3:12 pmSantiago de los Caballeros
May 13
STI6:00 amSantiago de los Caballeros
11h 39m
2 stops
STL4:39 pmLambert-St Louis
$813
United Airlines
Apr 20
STL9:10 amLambert-St Louis
12h 42m
2 stops
STI10:52 pmSantiago de los Caballeros
Apr 24
STI2:07 pmSantiago de los Caballeros
21h 38m
2 stops
STL10:45 amLambert-St Louis
$818

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 March 29, 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

Sun 5/10

6:55 pm-3:20 pm

2 stops19h 25m

Santiago de los Caballeros

Sun 5/17

3:07 pm-8:55 am

2 stops18h 48m

$472

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 6/4

11:15 am-9:13 pm

1 stop8h 58m

Santiago de los Caballeros

Tue 6/9

1:21 pm-11:59 pm

1 stop11h 38m

$589

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/28

6:15 am-9:13 pm

2 stops13h 58m

Santiago de los Caballeros

Tue 6/2

9:06 am-11:44 pm

2 stops15h 38m

$593

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/28

5:15 am-9:13 pm

1 stop14h 58m

Santiago de los Caballeros

Tue 6/2

9:06 am-10:58 pm

1 stop14h 52m

$609

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/28

5:08 am-9:13 pm

2 stops15h 05m

Santiago de los Caballeros

Tue 6/2

1:21 pm-11:59 pm

1 stop11h 38m

$613
Quickest round-trip

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/14

5:24 am-12:23 pm

1 stop5h 59m

Santiago de los Caballeros

Mon 5/18

1:32 pm-10:24 pm

1 stop9h 52m

$619

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/14

5:24 am-12:23 pm

1 stop5h 59m

Santiago de los Caballeros

Mon 5/18

1:32 pm-9:25 am

2 stops20h 53m

$623

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 5/10

5:24 am-12:23 pm

1 stop5h 59m

Santiago de los Caballeros

Sun 5/17

1:32 pm-10:24 pm

1 stop9h 52m

$624

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Sun 5/10

5:24 am-12:23 pm

1 stop5h 59m

Santiago de los Caballeros

Sun 5/17

1:32 pm-8:30 am

2 stops19h 58m

$628

St. LouisSantiago de los Caballeros

STL - STI

STLSTI

Lambert-St Louis

Thu 5/28

5:15 am-9:13 pm

1 stop14h 58m

Santiago de los Caballeros

Tue 6/2

1:21 pm-11:59 pm

1 stop11h 38m

$629

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 14% 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

7h 34m

Direct flights

None
The fastest flight from St. Louis to Santiago de los Caballeros takes 7h 34m
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

  • 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 7h 34m 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
9,509 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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