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Cheap flights from Santiago to St. Louis from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Santiago to St. Louis departing on 9/16. 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

Find the cheapest flights from Santiago to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
8:55 pm - 3:54 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
20h 59m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
Delta Logo
10:05 am - 7:00 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
18h 55m2 stops Atlanta Hartsfield-Jackson Bogotá El Dorado
$916Delta
Wed, Sep 9 - Thu, Sep 24
United Airlines Logo
10:45 pm - 2:13 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
18h 28m1 stop Houston George Bush Intcntl
United Airlines Logo
1:08 pm - 8:50 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
16h 42m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
$925United Airlines
Thu, Nov 5 - Mon, Nov 9
American Airlines Logo
8:50 pm - 5:01 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
21h 11m2 stops Miami Philadelphia
American Airlines Logo
6:07 pm - 8:10 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
12h 03m1 stop Miami
$930American Airlines
Thu, Sep 3 - Sun, Oct 11
LATAM Airlines Logo
9:30 am - 12:32 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
29h 02m3 stops Buenos Aires Ministro Pistarini Miami Atlanta Hartsfield-Jackson
LATAM Airlines Logo
6:00 am - 6:55 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
22h 55m2 stops Atlanta Hartsfield-Jackson Miami
$961LATAM Airlines
Wed, Sep 9 - Wed, Sep 30
Copa Airlines Logo
5:14 am - 10:48 amSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
31h 34m2 stops Panama City Tocumen Intl Chicago O'Hare Intl
Copa Airlines Logo
8:00 am - 8:32 pmSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
34h 32m2 stops Chicago O'Hare Intl Panama City Tocumen Intl
$979Copa Airlines
Sat, Sep 26 - Sat, Oct 3
Delta Logo
8:55 pm - 1:23 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
18h 28m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson
Delta Logo
6:54 pm - 3:00 pmSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
18h 06m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
$982Delta
Tue, Sep 15 - Sun, Sep 20
LATAM Airlines Logo
8:40 pm - 9:00 amSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
14h 20m1 stop Atlanta Hartsfield-Jackson
LATAM Airlines Logo
10:05 am - 8:15 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
20h 10m1 stop Atlanta Hartsfield-Jackson
$993LATAM Airlines
Tue, Sep 15 - Sun, Sep 20
American Airlines Logo
9:30 pm - 1:16 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
17h 46m2 stops Miami Chicago O'Hare Intl
American Airlines Logo
1:54 pm - 8:00 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
16h 06m2 stops Charlotte Douglas Miami
$996American Airlines
Fri, Sep 25 - Sat, Oct 3
American Airlines Logo
9:30 pm - 11:59 pmSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
28h 29m1 stop Miami
American Airlines Logo
11:01 am - 8:00 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
18h 59m2 stops Chicago O'Hare Intl Miami
$1,007American Airlines
Fri, Sep 25 - Sat, Oct 3
LATAM Airlines Logo
8:30 am - 11:46 amSCL  Santiago Arturo Merino Benitez-STL Lambert-St Louis
28h 16m3 stops Buenos Aires Ministro Pistarini Miami Atlanta Hartsfield-Jackson
LATAM Airlines Logo
6:00 am - 6:55 amSTL  Lambert-St Louis-SCL Santiago Arturo Merino Benitez
22h 55m2 stops Atlanta Hartsfield-Jackson Miami
$1,032LATAM Airlines
Thu, Sep 3 - Sun, Oct 11

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LATAM Airlines flights from Santiago to St. Louis

Our best LATAM Airlines deals on Santiago to St. Louis flight tickets
LATAM Airlines
Sep 9
SCL9:30 amSantiago Arturo Merino Benitez
29h 02m
3 stops
STL12:32 pmLambert-St Louis
Sep 30
STL6:00 amLambert-St Louis
22h 55m
2 stops
SCL6:55 amSantiago Arturo Merino Benitez
$961
LATAM Airlines
Aug 14
SCL5:40 amSantiago Arturo Merino Benitez
28h 40m
2 stops
STL9:20 amLambert-St Louis
Aug 17
STL6:00 amLambert-St Louis
21h 50m
2 stops
SCL4:50 amSantiago Arturo Merino Benitez
$993
LATAM Airlines
Sep 3
SCL8:30 amSantiago Arturo Merino Benitez
28h 16m
3 stops
STL11:46 amLambert-St Louis
Oct 11
STL6:00 amLambert-St Louis
22h 55m
2 stops
SCL6:55 amSantiago Arturo Merino Benitez
$1,032

American Airlines flights from Santiago to St. Louis

Our best American Airlines deals on Santiago to St. Louis flight tickets
American Airlines
Sep 3
SCL8:50 pmSantiago Arturo Merino Benitez
21h 11m
2 stops
STL5:01 pmLambert-St Louis
Oct 11
STL6:07 pmLambert-St Louis
12h 03m
1 stop
SCL8:10 amSantiago Arturo Merino Benitez
$930
American Airlines
Sep 25
SCL9:30 pmSantiago Arturo Merino Benitez
17h 46m
2 stops
STL1:16 pmLambert-St Louis
Oct 3
STL1:54 pmLambert-St Louis
16h 06m
2 stops
SCL8:00 amSantiago Arturo Merino Benitez
$996
American Airlines
Sep 25
SCL9:30 pmSantiago Arturo Merino Benitez
28h 29m
1 stop
STL11:59 pmLambert-St Louis
Oct 3
STL11:01 amLambert-St Louis
18h 59m
2 stops
SCL8:00 amSantiago Arturo Merino Benitez
$1,007

momondo Fare Finder

 
Customize your flight search to find flights from Santiago to St. Louis 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 August 6, 2026.
Use the filters below to find and compare flights from Santiago to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Wed 9/9

8:55 pm-3:54 pm

2 stops20h 59m

Lambert-St Louis

Thu 9/24

10:05 am-7:00 am

2 stops18h 55m

$916

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Thu 11/5

10:45 pm-2:13 pm

1 stop18h 28m

Lambert-St Louis

Mon 11/9

1:08 pm-8:50 am

2 stops16h 42m

$925
Quickest round-trip

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Thu 9/3

8:50 pm-5:01 pm

2 stops21h 11m

Lambert-St Louis

Sun 10/11

6:07 pm-8:10 am

1 stop12h 03m

$930

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Wed 9/9

9:30 am-12:32 pm

3 stops29h 02m

Lambert-St Louis

Wed 9/30

6:00 am-6:55 am

2 stops22h 55m

$961

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Sat 9/26

5:14 am-10:48 am

2 stops31h 34m

Lambert-St Louis

Sat 10/3

8:00 am-8:32 pm

2 stops34h 32m

$979

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Tue 9/15

8:55 pm-1:23 pm

2 stops18h 28m

Lambert-St Louis

Sun 9/20

6:54 pm-3:00 pm

2 stops18h 06m

$982

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Tue 9/15

8:40 pm-9:00 am

1 stop14h 20m

Lambert-St Louis

Sun 9/20

10:05 am-8:15 am

1 stop20h 10m

$993

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Fri 9/25

9:30 pm-1:16 pm

2 stops17h 46m

Lambert-St Louis

Sat 10/3

1:54 pm-8:00 am

2 stops16h 06m

$996

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Fri 9/25

9:30 pm-11:59 pm

1 stop28h 29m

Lambert-St Louis

Sat 10/3

11:01 am-8:00 am

2 stops18h 59m

$1,007

SantiagoSt. Louis

SCL Santiago Arturo Merino Benitez - STL Lambert-St Louis

SCLSTL

Santiago Arturo Merino Benitez

Thu 9/3

8:30 am-11:46 am

3 stops28h 16m

Lambert-St Louis

Sun 10/11

6:00 am-6:55 am

2 stops22h 55m

$1,032

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Santiago 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

What is the cheapest month to fly to St. Louis?

In general, September is the cheapest month to fly from Santiago to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $674. The month of December is another great option to travel to St. Louis, with average flight prices from Santiago averaging around $795.

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

You could potentially save up to 22% on your flight if you consider stops on a Santiago to St. Louis flight.

When to book flights from Santiago to St. Louis

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

Cheap Santiago to St. Louis (SCL to STL) flight deals and tips

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

Fastest flight time

19h 18m

Direct flights

None
The fastest flight from Santiago to St. Louis takes 19h 18m
There are no direct flights from Santiago to St. Louis. There are no popular flight routes from Santiago to St. Louis.
Search flight deals

Frequently asked questions about flying from Santiago to St. Louis

  • How far is Santiago Arturo Merino Benitez to Lambert-St Louis by plane?

    Santiago Arturo Merino Benitez and Lambert-St Louis are 5131.6 mi apart from one another. By plane, this route typically takes 19h 18m.

  • When did momondo last update prices for flights from Santiago Arturo Merino Benitez Airport to Lambert-St Louis Airport?

    Prices for flights from Santiago Arturo Merino Benitez Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Santiago Arturo Merino Benitez Airport to Lambert-St Louis 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 Santiago Arturo Merino Benitez Airport to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
Alton
O'Fallon
Clayton
Farmington
Fenton
Wentzville
Festus
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Santiago to St. Louis. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Santiago to St. Louis flights to just show those with flexible booking policies.

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

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 St. Louis from Santiago.

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

Yes momondo offers price alerts on flights to St. Louis from Santiago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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