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Cheap flights from St. Louis to Rio de Janeiro from $585

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 1/8. 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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Find the cheapest flights from St. Louis to Rio de Janeiro

Cheap round-trip flights

Air Canada Logo
9:15 am - 2:20 pmSTL-SDU
27h 05m2 stops
Air Canada Logo
11:25 am - 7:38 pmSDU-STL
34h 13m2 stops
$900Air Canada
Find Deal
dom., sep. 14 - mar., sep. 23
Air Canada Logo
4:05 pm - 2:20 pmSTL-SDU
19h 15m2 stops
Air Canada Logo
11:25 am - 3:29 pmSDU-STL
31h 04m2 stops
$1,635Air Canada
Find Deal
mié., dic. 31 - vie., ene. 9
Logo
4:05 pm - 2:20 pmSTL-SDU
19h 15m2 stops
Logo
10:00 am - 1:53 pmSDU-STL
30h 53m3 stops
$1,692
Find Deal
mié., dic. 31 - vie., ene. 9

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

Our best Air Canada deals on St. Louis to Rio de Janeiro Santos Dumont Airport flight tickets
Air Canada
Sep 14
STL9:15 amLambert-St Louis
27h 05m
2 stops
SDU2:20 pmRio de Janeiro Santos Dumont
Sep 23
SDU11:25 amRio de Janeiro Santos Dumont
34h 13m
2 stops
STL7:38 pmLambert-St Louis
$900
Find similar
Air Canada
Dec 31
STL4:05 pmLambert-St Louis
19h 15m
2 stops
SDU2:20 pmRio de Janeiro Santos Dumont
Jan 9
SDU11:25 amRio de Janeiro Santos Dumont
31h 04m
2 stops
STL3:29 pmLambert-St Louis
$1,635
Find similar

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 agosto 4, 2025.
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

dom. 9/14

9:15 am-2:20 pm

2 stops27h 05m

Rio de Janeiro Santos Dumont

mar. 9/23

11:25 am-7:38 pm

2 stops34h 13m

$900

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

mié. 12/31

4:05 pm-2:20 pm

2 stops19h 15m

Rio de Janeiro Santos Dumont

vie. 1/9

11:25 am-3:29 pm

2 stops31h 04m

$1,635

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

mié. 12/31

4:05 pm-2:20 pm

2 stops19h 15m

Rio de Janeiro Santos Dumont

vie. 1/9

10:00 am-1:53 pm

3 stops30h 53m

$1,692

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 1/8

12:20 pm-1:15 pm

3 stops45h 55m

$585

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 1/8

12:24 pm-2:20 pm

2 stops22h 56m

$644

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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?

United 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

Best Price Found

$585

Fastest flight time

19h 15m

Direct flights

None
The best one-way flight to Rio de Janeiro Santos Dumont Airport from St. Louis in the past 72 hours is $585. The best round-trip flight deal from St. Louis to Rio de Janeiro Santos Dumont Airport found on momondo in the last 72 hours is $900.
The fastest flight from St. Louis to Rio de Janeiro Santos Dumont Airport takes 19h 15m
There are no direct flights from St. Louis to Rio de Janeiro Santos Dumont Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - 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 15m 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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