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Cheap flights from St. Louis to Rio de Janeiro from $449

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 10/6. 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 St. Louis to Rio de Janeiro

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:12 pm - 4:45 pm
STL
-
SDU
23h 33m
2 stops
United Airlines Logo
1:45 pm - 3:43 pm
SDU
-
STL
27h 58m
2 stops
$1,151United Airlines
Wed, Oct 7 - Mon, Oct 12
United Airlines Logo
9:04 am - 4:45 pm
STL
-
SDU
29h 41m
2 stops
United Airlines Logo
1:45 pm - 2:10 pm
SDU
-
STL
26h 25m
2 stops
$1,152United Airlines
Wed, Oct 7 - Mon, Oct 19
United Airlines Logo
8:00 am - 4:45 pm
STL
-
SDU
30h 45m
2 stops
United Airlines Logo
1:45 pm - 10:10 am
SDU
-
STL
22h 25m
2 stops
$1,201United Airlines
Wed, Oct 7 - Mon, Oct 19
United Airlines Logo
6:14 am - 4:45 pm
STL
-
SDU
32h 31m
2 stops
United Airlines Logo
1:45 pm - 12:11 pm
SDU
-
STL
24h 26m
2 stops
$1,294United Airlines
Tue, Jul 7 - Tue, Jul 28
United Airlines Logo
6:14 am - 4:45 pm
STL
-
SDU
32h 31m
2 stops
United Airlines Logo
1:45 pm - 9:26 pm
SDU
-
STL
33h 41m
2 stops
$1,301United Airlines
Tue, Jul 7 - Tue, Jul 28
Air Canada Logo
4:15 pm - 7:40 am
STL
-
SDU
36h 25m
2 stops
Air Canada Logo
1:45 pm - 3:30 pm
SDU
-
STL
28h 45m
2 stops
$1,327Air Canada
Sun, Nov 8 - Thu, Nov 12
Multiple Airlines Logo
4:15 pm - 4:45 pm
STL
-
SDU
21h 30m
2 stops
Multiple Airlines Logo
8:15 am - 3:30 pm
SDU
-
STL
34h 15m
2 stops
$1,407Multiple Airlines
Wed, Nov 25 - Wed, Jan 13
Multiple Airlines Logo
4:15 pm - 4:45 pm
STL
-
SDU
21h 30m
2 stops
Multiple Airlines Logo
8:15 am - 3:30 pm
SDU
-
STL
34h 15m
2 stops
$1,409Multiple Airlines
Wed, Nov 25 - Wed, Jan 13
Multiple Airlines Logo
4:15 pm - 4:45 pm
STL
-
SDU
21h 30m
2 stops
Multiple Airlines Logo
8:15 am - 3:30 pm
SDU
-
STL
34h 15m
2 stops
$1,415Multiple Airlines
Wed, Nov 25 - Wed, Jan 13
GOL Logo
11:00 am - 12:25 pm
STL
-
SDU
23h 25m
2 stops
GOL Logo
3:30 pm - 10:45 am
SDU
-
STL
21h 15m
2 stops
$1,486GOL
Sun, Jul 26 - Sat, Aug 8

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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
Jun 23
STL5:16 amLambert-St Louis
25h 24m
2 stops
SDU8:40 amRio de Janeiro Santos Dumont
Aug 5
SDU8:50 pmRio de Janeiro Santos Dumont
27h 50m
2 stops
STL10:40 pmLambert-St Louis
$1,390
GOL
Jul 26
STL11:00 amLambert-St Louis
23h 25m
2 stops
SDU12:25 pmRio de Janeiro Santos Dumont
Aug 8
SDU3:30 pmRio de Janeiro Santos Dumont
21h 15m
2 stops
STL10:45 amLambert-St Louis
$1,486
GOL
Nov 25
STL4:21 pmLambert-St Louis
15h 29m
2 stops
SDU10:50 amRio de Janeiro Santos Dumont
Jan 4
SDU8:45 pmRio de Janeiro Santos Dumont
47h 39m
2 stops
STL5:24 pmLambert-St Louis
$1,639

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

Our best United Airlines deals on St. Louis to Rio de Janeiro Santos Dumont Airport flight tickets
United Airlines
Oct 7
STL3:12 pmLambert-St Louis
23h 33m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Oct 12
SDU1:45 pmRio de Janeiro Santos Dumont
27h 58m
2 stops
STL3:43 pmLambert-St Louis
$1,151
United Airlines
Oct 7
STL5:36 pmLambert-St Louis
21h 09m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Oct 19
SDU1:45 pmRio de Janeiro Santos Dumont
24h 28m
2 stops
STL12:13 pmLambert-St Louis
$1,152
United Airlines
Oct 7
STL8:00 amLambert-St Louis
30h 45m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Oct 19
SDU1:45 pmRio de Janeiro Santos Dumont
22h 25m
2 stops
STL10:10 amLambert-St Louis
$1,201

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 June 15, 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

Cheapest round-trip

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 10/7

3:12 pm-4:45 pm

2 stops23h 33m

Rio de Janeiro Santos Dumont

Mon 10/12

1:45 pm-3:43 pm

2 stops27h 58m

$1,151

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 10/7

9:04 am-4:45 pm

2 stops29h 41m

Rio de Janeiro Santos Dumont

Mon 10/19

1:45 pm-2:10 pm

2 stops26h 25m

$1,152

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 10/7

8:00 am-4:45 pm

2 stops30h 45m

Rio de Janeiro Santos Dumont

Mon 10/19

1:45 pm-10:10 am

2 stops22h 25m

$1,201

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Tue 7/7

6:14 am-4:45 pm

2 stops32h 31m

Rio de Janeiro Santos Dumont

Tue 7/28

1:45 pm-12:11 pm

2 stops24h 26m

$1,294

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Tue 7/7

6:14 am-4:45 pm

2 stops32h 31m

Rio de Janeiro Santos Dumont

Tue 7/28

1:45 pm-9:26 pm

2 stops33h 41m

$1,301

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 11/8

4:15 pm-7:40 am

2 stops36h 25m

Rio de Janeiro Santos Dumont

Thu 11/12

1:45 pm-3:30 pm

2 stops28h 45m

$1,327

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 11/25

4:15 pm-4:45 pm

2 stops21h 30m

Rio de Janeiro Santos Dumont

Wed 1/13

8:15 am-3:30 pm

2 stops34h 15m

$1,407

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 11/25

4:15 pm-4:45 pm

2 stops21h 30m

Rio de Janeiro Santos Dumont

Wed 1/13

8:15 am-3:30 pm

2 stops34h 15m

$1,409

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 11/25

4:15 pm-4:45 pm

2 stops21h 30m

Rio de Janeiro Santos Dumont

Wed 1/13

8:15 am-3:30 pm

2 stops34h 15m

$1,415
Quickest round-trip

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 7/26

11:00 am-12:25 pm

2 stops23h 25m

Rio de Janeiro Santos Dumont

Sat 8/8

3:30 pm-10:45 am

2 stops21h 15m

$1,486

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Rio de Janeiro from

How to get the cheapest flight ticket from St. Louis to Rio de Janeiro Santos Dumont Airport

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 Lambert-St Louis to Rio de Janeiro Santos Dumont?

LATAM Airlines is the most popular carrier operating from Lambert-St Louis to Rio de Janeiro Santos Dumont

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

21h 30m

Direct flights

None
The fastest flight from St. Louis to Rio de Janeiro Santos Dumont Airport takes 21h 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.
Search flight deals

Frequently asked questions about flying from St. Louis to Rio de Janeiro Santos Dumont Airport

  • 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 21h 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.

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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