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Cheap flights from St. Louis to Rio de Janeiro from $325

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 Rio de Janeiro departing on 3/18. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
GOL Logo
11:22 am - 10:55 am
STL
-
SDU
21h 33m
2 stops
GOL Logo
8:45 pm - 10:54 pm
SDU
-
STL
28h 09m
2 stops
$1,225GOL
Mon, Mar 30 - Fri, Apr 10
GOL Logo
11:04 am - 4:40 pm
STL
-
SDU
27h 36m
2 stops
GOL Logo
9:45 am - 10:45 pm
SDU
-
STL
39h 00m
2 stops
$1,261GOL
Sat, Jun 13 - Sat, Jun 20
United Airlines Logo
8:21 am - 4:45 pm
STL
-
SDU
30h 24m
2 stops
United Airlines Logo
1:45 pm - 9:25 am
SDU
-
STL
21h 40m
2 stops
$1,319United Airlines
Thu, Apr 9 - Mon, Apr 13
United Airlines Logo
8:21 am - 4:45 pm
STL
-
SDU
30h 24m
2 stops
United Airlines Logo
1:45 pm - 9:25 am
SDU
-
STL
21h 40m
2 stops
$1,339United Airlines
Thu, Apr 9 - Mon, Apr 13
Multiple Airlines Logo
4:05 pm - 2:35 pm
STL
-
SDU
19h 30m
2 stops
Multiple Airlines Logo
8:15 am - 3:29 pm
SDU
-
STL
34h 14m
2 stops
$1,448Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
4:47 pm - 4:45 pm
STL
-
SDU
21h 58m
2 stops
United Airlines Logo
2:50 pm - 9:21 am
SDU
-
STL
20h 31m
2 stops
$1,736United Airlines
Sun, Mar 15 - Sun, Mar 22
GOL Logo
11:06 am - 10:45 am
STL
-
SDU
21h 39m
2 stops
GOL Logo
8:45 pm - 11:58 pm
SDU
-
STL
29h 13m
2 stops
$1,813GOL
Sat, Mar 21 - Sun, Mar 29
Delta Logo
12:04 pm - 1:10 pm
STL
-
SDU
23h 06m
2 stops
Delta Logo
8:15 pm - 3:13 pm
SDU
-
STL
20h 58m
2 stops
$3,121Delta
Tue, Mar 31 - Sat, Apr 11
Delta Logo
12:04 pm - 8:35 am
STL
-
SDU
18h 31m
2 stops
Delta Logo
8:20 pm - 11:09 am
SDU
-
STL
16h 49m
2 stops
$7,121Delta
Sun, Mar 29 - Thu, Apr 9

GOL flights from St. Louis to Rio de Janeiro Santos Dumont Airport

Our best GOL deals on St. Louis to Rio de Janeiro Santos Dumont Airport flight tickets
GOL
Mar 30
STL11:22 amLambert-St Louis
21h 33m
2 stops
SDU10:55 amRio de Janeiro Santos Dumont
Apr 10
SDU8:45 pmRio de Janeiro Santos Dumont
28h 09m
2 stops
STL10:54 pmLambert-St Louis
$1,225
GOL
Jun 13
STL11:04 amLambert-St Louis
27h 36m
2 stops
SDU4:40 pmRio de Janeiro Santos Dumont
Jun 20
SDU9:45 amRio de Janeiro Santos Dumont
39h 00m
2 stops
STL10:45 pmLambert-St Louis
$1,261
GOL
Feb 3
STL6:02 pmLambert-St Louis
37h 43m
2 stops
SDU10:45 amRio de Janeiro Santos Dumont
Feb 8
SDU6:00 amRio de Janeiro Santos Dumont
20h 59m
2 stops
STL11:59 pmLambert-St Louis
$1,631

Delta flights from St. Louis to Rio de Janeiro Santos Dumont Airport

Our best Delta deals on St. Louis to Rio de Janeiro Santos Dumont Airport flight tickets
Delta
Mar 31
STL12:04 pmLambert-St Louis
23h 06m
2 stops
SDU1:10 pmRio de Janeiro Santos Dumont
Apr 11
SDU8:15 pmRio de Janeiro Santos Dumont
20h 58m
2 stops
STL3:13 pmLambert-St Louis
$3,121
Delta
Mar 29
STL12:04 pmLambert-St Louis
18h 31m
2 stops
SDU8:35 amRio de Janeiro Santos Dumont
Apr 9
SDU8:20 pmRio de Janeiro Santos Dumont
16h 49m
2 stops
STL11:09 amLambert-St Louis
$7,121

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Rio de Janeiro Santos Dumont Airport 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 29, 2026.
Use the filters below to find and compare flights from St. Louis to Rio de Janeiro Santos Dumont Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Mon 3/30

11:22 am-10:55 am

2 stops21h 33m

Rio de Janeiro Santos Dumont

Fri 4/10

8:45 pm-10:54 pm

2 stops28h 09m

$1,225

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 6/13

11:04 am-4:40 pm

2 stops27h 36m

Rio de Janeiro Santos Dumont

Sat 6/20

9:45 am-10:45 pm

2 stops39h 00m

$1,261

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Thu 4/9

8:21 am-4:45 pm

2 stops30h 24m

Rio de Janeiro Santos Dumont

Mon 4/13

1:45 pm-9:25 am

2 stops21h 40m

$1,319

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Thu 4/9

8:21 am-4:45 pm

2 stops30h 24m

Rio de Janeiro Santos Dumont

Mon 4/13

1:45 pm-9:25 am

2 stops21h 40m

$1,339

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 2/18

4:05 pm-2:35 pm

2 stops19h 30m

Rio de Janeiro Santos Dumont

Wed 2/25

8:15 am-3:29 pm

2 stops34h 14m

$1,448

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 3/15

4:47 pm-4:45 pm

2 stops21h 58m

Rio de Janeiro Santos Dumont

Sun 3/22

2:50 pm-9:21 am

2 stops20h 31m

$1,736

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 3/21

11:06 am-10:45 am

2 stops21h 39m

Rio de Janeiro Santos Dumont

Sun 3/29

8:45 pm-11:58 pm

2 stops29h 13m

$1,813

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Tue 3/31

12:04 pm-1:10 pm

2 stops23h 06m

Rio de Janeiro Santos Dumont

Sat 4/11

8:15 pm-3:13 pm

2 stops20h 58m

$3,121

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 3/29

12:04 pm-8:35 am

2 stops18h 31m

Rio de Janeiro Santos Dumont

Thu 4/9

8:20 pm-11:09 am

2 stops16h 49m

$7,121

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 3/18

8:32 am-10:45 am

2 stops24h 13m

$325

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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When to book flights from St. Louis to Rio de Janeiro Santos Dumont Airport

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

Cheap St. Louis to Rio de Janeiro Santos Dumont Airport (STL to SDU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Rio de Janeiro Santos Dumont Airport

Fastest flight time

19h 30m

Direct flights

None
The fastest flight from St. Louis to Rio de Janeiro Santos Dumont Airport takes 19h 30m
There are no direct flights from St. Louis to Rio de Janeiro Santos Dumont Airport. There are no popular flight routes from St. Louis to Rio de Janeiro Santos Dumont Airport.
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  • How far is Lambert-St Louis to Rio de Janeiro Santos Dumont by plane?

    Lambert-St Louis and Rio de Janeiro Santos Dumont are 5225.0 mi apart from one another. Typically, this will take 19h 30m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Rio de Janeiro Santos Dumont Airport?

    Prices for flights from Lambert-St Louis Airport to Rio de Janeiro Santos Dumont Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Rio de Janeiro Santos Dumont 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 Rio de Janeiro Santos Dumont Airport.

  • What documentation or ID do you need to fly to Rio de Janeiro Santos Dumont Airport?

    The required travel and health documents for your Rio de Janeiro Santos Dumont 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 Rio de Janeiro Santos Dumont Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • How do I get Price Alerts for flights from St. Louis to Rio de Janeiro Santos Dumont Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Rio de Janeiro Santos Dumont Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from St. Louis to Rio de Janeiro Santos Dumont Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Rio de Janeiro?

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 St. Louis to Rio de Janeiro for you.

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

All flight searches from St. Louis to Rio de Janeiro on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Rio de Janeiro?

momondo helps you find the best flight between St. Louis and Rio de Janeiro by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of St. Louis to Rio de Janeiro flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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