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Cheap flights from St. Louis to Rio de Janeiro from $490

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 5/28. 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
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
8:15 pm - 4:45 pm
STL
-
SDU
42h 30m
2 stops
United Airlines Logo
1:50 pm - 9:16 pm
SDU
-
STL
33h 26m
2 stops
$1,144United Airlines
Mon, Jun 15 - Mon, Jun 22
United Airlines Logo
6:00 am - 4:45 pm
STL
-
SDU
32h 45m
2 stops
United Airlines Logo
1:45 pm - 3:46 pm
SDU
-
STL
28h 01m
2 stops
$1,209United Airlines
Mon, Jun 8 - Mon, Jun 15
Multiple Airlines Logo
8:55 am - 5:45 pm
STL
-
SDU
30h 50m
2 stops
Multiple Airlines Logo
1:45 pm - 2:00 pm
SDU
-
STL
26h 15m
2 stops
$1,231Multiple Airlines
Sat, Sep 26 - Tue, Sep 29
GOL Logo
6:24 pm - 10:15 pm
STL
-
SDU
25h 51m
2 stops
GOL Logo
8:50 pm - 10:35 am
SDU
-
STL
39h 45m
2 stops
$1,235GOL
Sat, Jun 13 - Sat, Jun 20
GOL Logo
6:24 pm - 10:45 am
STL
-
SDU
38h 21m
2 stops
GOL Logo
5:45 pm - 10:35 am
SDU
-
STL
42h 50m
2 stops
$1,250GOL
Sat, Jun 13 - Sat, Jun 20
Air Canada Logo
8:55 am - 5:45 pm
STL
-
SDU
30h 50m
2 stops
Air Canada Logo
1:45 pm - 2:00 pm
SDU
-
STL
26h 15m
2 stops
$1,261Air Canada
Sat, Sep 26 - Tue, Sep 29
GOL Logo
11:00 am - 2:20 pm
STL
-
SDU
25h 20m
2 stops
GOL Logo
9:55 am - 10:24 am
SDU
-
STL
26h 29m
2 stops
$1,271GOL
Sun, Jul 26 - Wed, Jul 29
Multiple Airlines Logo
8:55 am - 8:15 pm
STL
-
SDU
33h 20m
2 stops
Multiple Airlines Logo
1:45 pm - 2:00 pm
SDU
-
STL
26h 15m
2 stops
$1,292Multiple Airlines
Fri, Sep 25 - Mon, Sep 28
GOL Logo
11:00 am - 10:55 am
STL
-
SDU
21h 55m
2 stops
GOL Logo
6:05 am - 10:53 pm
SDU
-
STL
18h 48m
2 stops
$1,299GOL
Thu, Jul 9 - Sun, Jul 12
United Airlines Logo
1:18 pm - 4:45 pm
STL
-
SDU
25h 27m
2 stops
United Airlines Logo
1:45 pm - 9:22 pm
SDU
-
STL
33h 37m
2 stops
$1,302United Airlines
Mon, Aug 24 - Mon, Sep 7

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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
Jun 15
STL8:15 pmLambert-St Louis
42h 30m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Jun 22
SDU1:50 pmRio de Janeiro Santos Dumont
33h 26m
2 stops
STL9:16 pmLambert-St Louis
$1,144
United Airlines
Jun 8
STL6:00 amLambert-St Louis
32h 45m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Jun 15
SDU1:45 pmRio de Janeiro Santos Dumont
28h 01m
2 stops
STL3:46 pmLambert-St Louis
$1,209
United Airlines
Aug 24
STL1:18 pmLambert-St Louis
25h 27m
2 stops
SDU4:45 pmRio de Janeiro Santos Dumont
Sep 7
SDU1:45 pmRio de Janeiro Santos Dumont
33h 37m
2 stops
STL9:22 pmLambert-St Louis
$1,302

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 13
STL6:24 pmLambert-St Louis
25h 51m
2 stops
SDU10:15 pmRio de Janeiro Santos Dumont
Jun 20
SDU8:50 pmRio de Janeiro Santos Dumont
39h 45m
2 stops
STL10:35 amLambert-St Louis
$1,235
GOL
Jun 13
STL6:24 pmLambert-St Louis
38h 21m
2 stops
SDU10:45 amRio de Janeiro Santos Dumont
Jun 20
SDU5:45 pmRio de Janeiro Santos Dumont
42h 50m
2 stops
STL10:35 amLambert-St Louis
$1,250
GOL
Jul 26
STL11:00 amLambert-St Louis
25h 20m
2 stops
SDU2:20 pmRio de Janeiro Santos Dumont
Jul 29
SDU9:55 amRio de Janeiro Santos Dumont
26h 29m
2 stops
STL10:24 amLambert-St Louis
$1,271

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 April 30, 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

Mon 6/15

8:15 pm-4:45 pm

2 stops42h 30m

Rio de Janeiro Santos Dumont

Mon 6/22

1:50 pm-9:16 pm

2 stops33h 26m

$1,144

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Mon 6/8

6:00 am-4:45 pm

2 stops32h 45m

Rio de Janeiro Santos Dumont

Mon 6/15

1:45 pm-3:46 pm

2 stops28h 01m

$1,209

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 9/26

8:55 am-5:45 pm

2 stops30h 50m

Rio de Janeiro Santos Dumont

Tue 9/29

1:45 pm-2:00 pm

2 stops26h 15m

$1,231

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 6/13

6:24 pm-10:15 pm

2 stops25h 51m

Rio de Janeiro Santos Dumont

Sat 6/20

8:50 pm-10:35 am

2 stops39h 45m

$1,235

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 6/13

6:24 pm-10:45 am

2 stops38h 21m

Rio de Janeiro Santos Dumont

Sat 6/20

5:45 pm-10:35 am

2 stops42h 50m

$1,250

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 9/26

8:55 am-5:45 pm

2 stops30h 50m

Rio de Janeiro Santos Dumont

Tue 9/29

1:45 pm-2:00 pm

2 stops26h 15m

$1,261

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 7/26

11:00 am-2:20 pm

2 stops25h 20m

Rio de Janeiro Santos Dumont

Wed 7/29

9:55 am-10:24 am

2 stops26h 29m

$1,271

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Fri 9/25

8:55 am-8:15 pm

2 stops33h 20m

Rio de Janeiro Santos Dumont

Mon 9/28

1:45 pm-2:00 pm

2 stops26h 15m

$1,292
Quickest round-trip

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Thu 7/9

11:00 am-10:55 am

2 stops21h 55m

Rio de Janeiro Santos Dumont

Sun 7/12

6:05 am-10:53 pm

2 stops18h 48m

$1,299

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Mon 8/24

1:18 pm-4:45 pm

2 stops25h 27m

Rio de Janeiro Santos Dumont

Mon 9/7

1:45 pm-9:22 pm

2 stops33h 37m

$1,302

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 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?

GOL and United Airlines are the most popular carriers 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

18h 57m

Direct flights

None
The fastest flight from St. Louis to Rio de Janeiro Santos Dumont Airport takes 18h 57m
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 18h 57m 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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