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Santos Dumont

$345+ Cheap flights from St. Louis (STL) to Santos Dumont, Brazil (SDU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDU
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
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Cheap flight deals from St. Louis to Santos Dumont

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Santos Dumont (SDU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated noviembre 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,303
(United Airlines)

One-way from

$345
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$857
Provider with most accurate pricing for Lambert-St Louis-Rio de Janeiro (RIO) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Rio de Janeiro (RIO) flights.
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From Lambert-St Louis to Rio de Janeiro Santos Dumont
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One-way flight from Lambert-St Louis to Rio de Janeiro Santos Dumont
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Highest demand for flights based on searches. 8% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from St. Louis to Santos Dumont

Cheapest flights from St. Louis to Santos Dumont
Explore the most affordable flight options available from St. Louis to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 6, 2025.

This GOL deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure GOL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/206:00 pmSTL - SDU
2 stops35h 55mGOL
sáb. 12/276:00 amSDU - STL
2 stops19h 35mGOL
Deal found 11/5$2,356
This GOL deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure GOL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/186:00 pmSTL - SDU
2 stops35h 55mGOL
lun. 1/198:25 pmSDU - STL
2 stops30h 34mGOL
Deal found 11/6$3,156
This KAYAK deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/105:17 pmSTL - SDU
2 stops16h 58mLATAM Airlines
sáb. 11/158:05 pmSDU - STL
2 stops17h 38mLATAM Airlines
Deal found 11/5$4,414

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Santos Dumont 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, Cheapflights users made 2,558,603 searches. Data last updated noviembre 6, 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

St. Louis

Fly to

Santos Dumont

Route

Depart

Return

Price

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

sáb. 12/20

6:00 pm-8:55 am

2 stops35h 55m

Rio de Janeiro Santos Dumont

sáb. 12/27

6:00 am-10:35 pm

2 stops19h 35m

$2,356

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 12/18

6:00 pm-8:55 am

2 stops35h 55m

Rio de Janeiro Santos Dumont

lun. 1/19

8:25 pm-11:59 pm

2 stops30h 34m

$3,156

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

lun. 11/10

5:17 pm-1:15 pm

2 stops16h 58m

Rio de Janeiro Santos Dumont

sáb. 11/15

8:05 pm-10:43 am

2 stops17h 38m

$4,414

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

dom. 1/25

10:42 am-10:25 pm

3 stops32h 43m

$345

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

sáb. 1/24

5:11 pm-3:00 pm

3 stops42h 49m

$377

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

lun. 1/26

5:44 pm-11:45 am

3 stops39h 01m

$416

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

mié. 1/28

5:11 pm-2:10 pm

2 stops41h 59m

$458

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

mar. 1/27

5:11 pm-8:55 am

2 stops36h 44m

$486

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

dom. 11/9

6:21 pm-10:25 pm

2 stops25h 04m

$641

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

vie. 1/30

4:05 pm-2:35 pm

2 stops19h 30m

$667

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 11 results
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Best time to book a flight from St. Louis to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Santos Dumont. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Rio de Janeiro Santos Dumont?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Rio de Janeiro Santos Dumont. On average, Lambert-St Louis has 0 outbound flights to Rio de Janeiro Santos Dumont per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Rio de Janeiro Santos Dumont Airport?

    GOL and LATAM Airlines can get you from St. Louis to Rio de Janeiro Santos Dumont Airport in just under 16h 58m. Your travel time can differ by up to 18h 57m. The distance between St. Louis and Rio de Janeiro Santos Dumont Airport is about 5238 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from St. Louis to Santos Dumont that include hotel bookings?

    Yes. In addition to deals on St. Louis to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Santos Dumont?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Santos Dumont.

  • Can I find deals for business class flights from St. Louis to Santos Dumont?

    Yes. Cheapflights offers flight deals from St. Louis to Santos Dumont by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for St. Louis to Santos Dumont

See prices for flight routes from nearby airports that may be better suited for you.
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