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Cheap flights from Santiago to St. Louis from $398

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 2/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
12:40 am - 6:02 pm
SCL
-
STL
18h 22m
2 stops
LATAM Airlines Logo
1:30 pm - 6:55 am
STL
-
SCL
16h 25m
2 stops
$792LATAM Airlines
Tue, Jul 14 - Wed, Aug 5
LATAM Airlines Logo
12:40 am - 6:02 pm
SCL
-
STL
18h 22m
2 stops
LATAM Airlines Logo
1:30 pm - 6:55 am
STL
-
SCL
16h 25m
2 stops
$795LATAM Airlines
Tue, Jul 14 - Wed, Aug 5
LATAM Airlines Logo
12:40 am - 6:02 pm
SCL
-
STL
18h 22m
2 stops
LATAM Airlines Logo
11:51 am - 7:15 am
STL
-
SCL
18h 24m
1 stop
$809LATAM Airlines
Tue, Jul 14 - Wed, Aug 5
LATAM Airlines Logo
12:40 am - 6:02 pm
SCL
-
STL
18h 22m
2 stops
LATAM Airlines Logo
11:51 am - 7:15 am
STL
-
SCL
18h 24m
1 stop
$812LATAM Airlines
Tue, Jul 14 - Wed, Aug 5
Delta Logo
8:40 pm - 3:57 pm
SCL
-
STL
20h 17m
1 stop
Delta Logo
1:30 pm - 7:15 am
STL
-
SCL
16h 45m
1 stop
$816Delta
Wed, Jul 15 - Wed, Aug 5
LATAM Airlines Logo
11:05 pm - 11:38 pm
SCL
-
STL
25h 33m
2 stops
LATAM Airlines Logo
1:30 pm - 5:25 pm
STL
-
SCL
26h 55m
2 stops
$822LATAM Airlines
Wed, Jul 1 - Wed, Jul 8
United Airlines Logo
10:45 pm - 9:05 pm
SCL
-
STL
25h 20m
2 stops
United Airlines Logo
7:41 am - 8:50 am
STL
-
SCL
46h 09m
2 stops
$846United Airlines
Wed, Feb 18 - Wed, Feb 25
Delta Logo
12:20 am - 5:42 pm
SCL
-
STL
20h 22m
2 stops
Delta Logo
7:03 am - 5:35 am
STL
-
SCL
20h 32m
2 stops
$849Delta
Wed, Mar 4 - Thu, Mar 12
American Airlines Logo
8:30 pm - 3:15 pm
SCL
-
STL
19h 45m
2 stops
American Airlines Logo
12:27 pm - 6:55 am
STL
-
SCL
17h 28m
2 stops
$863American Airlines
Sun, May 3 - Wed, May 20
Delta Logo
8:40 pm - 11:33 pm
SCL
-
STL
27h 53m
1 stop
Delta Logo
6:00 am - 7:15 am
STL
-
SCL
24h 15m
1 stop
$881Delta
Sun, May 3 - Wed, May 20

United Airlines flights from Santiago to St. Louis

Our best United Airlines deals on Santiago to St. Louis flight tickets
United Airlines
Feb 18
SCL10:45 pmSantiago Arturo Merino Benitez
25h 20m
2 stops
STL9:05 pmLambert-St Louis
Feb 25
STL7:41 amLambert-St Louis
46h 09m
2 stops
SCL8:50 amSantiago Arturo Merino Benitez
$846
United Airlines
Feb 25
SCL10:45 pmSantiago Arturo Merino Benitez
19h 53m
1 stop
STL3:38 pmLambert-St Louis
Mar 1
STL6:55 pmLambert-St Louis
34h 55m
2 stops
SCL8:50 amSantiago Arturo Merino Benitez
$903
United Airlines
Feb 25
SCL10:45 pmSantiago Arturo Merino Benitez
25h 20m
2 stops
STL9:05 pmLambert-St Louis
Mar 1
STL6:55 pmLambert-St Louis
34h 55m
2 stops
SCL8:50 amSantiago Arturo Merino Benitez
$911

Delta flights from Santiago to St. Louis

Our best Delta deals on Santiago to St. Louis flight tickets
Delta
Jul 15
SCL8:40 pmSantiago Arturo Merino Benitez
20h 17m
1 stop
STL3:57 pmLambert-St Louis
Aug 5
STL1:30 pmLambert-St Louis
16h 45m
1 stop
SCL7:15 amSantiago Arturo Merino Benitez
$816
Delta
Mar 4
SCL12:20 amSantiago Arturo Merino Benitez
20h 22m
2 stops
STL5:42 pmLambert-St Louis
Mar 12
STL7:03 amLambert-St Louis
20h 32m
2 stops
SCL5:35 amSantiago Arturo Merino Benitez
$849
Delta
May 3
SCL8:40 pmSantiago Arturo Merino Benitez
27h 53m
1 stop
STL11:33 pmLambert-St Louis
May 20
STL6:00 amLambert-St Louis
24h 15m
1 stop
SCL7:15 amSantiago Arturo Merino Benitez
$881

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 January 20, 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

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Tue 7/14

12:40 am-6:02 pm

2 stops18h 22m

Lambert-St Louis

Wed 8/5

1:30 pm-6:55 am

2 stops16h 25m

$792

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Tue 7/14

12:40 am-6:02 pm

2 stops18h 22m

Lambert-St Louis

Wed 8/5

1:30 pm-6:55 am

2 stops16h 25m

$795

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Tue 7/14

12:40 am-6:02 pm

2 stops18h 22m

Lambert-St Louis

Wed 8/5

11:51 am-7:15 am

1 stop18h 24m

$809

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Tue 7/14

12:40 am-6:02 pm

2 stops18h 22m

Lambert-St Louis

Wed 8/5

11:51 am-7:15 am

1 stop18h 24m

$812

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Wed 7/15

8:40 pm-3:57 pm

1 stop20h 17m

Lambert-St Louis

Wed 8/5

1:30 pm-7:15 am

1 stop16h 45m

$816

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Wed 7/1

11:05 pm-11:38 pm

2 stops25h 33m

Lambert-St Louis

Wed 7/8

1:30 pm-5:25 pm

2 stops26h 55m

$822

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Wed 2/18

10:45 pm-9:05 pm

2 stops25h 20m

Lambert-St Louis

Wed 2/25

7:41 am-8:50 am

2 stops46h 09m

$846

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Wed 3/4

12:20 am-5:42 pm

2 stops20h 22m

Lambert-St Louis

Thu 3/12

7:03 am-5:35 am

2 stops20h 32m

$849

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Sun 5/3

8:30 pm-3:15 pm

2 stops19h 45m

Lambert-St Louis

Wed 5/20

12:27 pm-6:55 am

2 stops17h 28m

$863

SantiagoSt. Louis

SCL - STL

SCLSTL

Santiago Arturo Merino Benitez

Sun 5/3

8:40 pm-11:33 pm

1 stop27h 53m

Lambert-St Louis

Wed 5/20

6:00 am-7:15 am

1 stop24h 15m

$881

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 airline that flies from Santiago Arturo Merino Benitez to Lambert-St Louis?

United Airlines is the most popular carrier operating from Santiago Arturo Merino Benitez to Lambert-St Louis

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

18h 39m

Direct flights

None
The fastest flight from Santiago to St. Louis takes 18h 39m
There are no direct flights from Santiago to St. Louis. There are no popular flight routes from Santiago to St. Louis.
Search flight deals

  • 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 18h 39m.

  • 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 many operators does momondo search for flights from Santiago Arturo Merino Benitez Airport to Lambert-St Louis Airport?

  • 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.

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

Best airlines flying from Santiago to St. Louis

Compare and see reviews for airlines that fly from Santiago to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $877Free CancellationRating
7.9
8,076 reviews
Search Delta flights
American AirlinesPriceFrom $948Free CancellationRating
7.2
11,164 reviews
Search American Airlines flights

Traveling to a place near St. Louis?

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