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Santos Dumont

$325+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDU
fev 28 — mar 71
sáb 2/28
sáb 3/7
1 adult, Economy
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Cheap 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 janeiro 29, 2026.

This KAYAK deal was found by Cheapflights users on 1/28. 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.
seg 11/164:40 pm
STL
-
SDU
2 stops17h 30m
LATAM Airlines
sáb 11/218:15 pm
SDU
-
STL
2 stops17h 33m
LATAM Airlines
Deal found 1/28$1,211
This GOL deal was found by Cheapflights users on 1/27. 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.
seg 3/3011:22 am
STL
-
SDU
2 stops21h 33m
GOL
sex 4/108:45 pm
SDU
-
STL
2 stops28h 09m
GOL
Deal found 1/27$1,225
This Priceline deal was found by Cheapflights users on 1/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 8/2611:51 am
STL
-
SDU
2 stops18h 44m
LATAM Airlines
qua 9/28:15 pm
SDU
-
STL
2 stops23h 47m
LATAM Airlines
Deal found 1/27$1,231
This Priceline deal was found by Cheapflights users on 1/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 9/79:00 am
STL
-
SDU
2 stops21h 35m
LATAM Airlines
seg 9/148:15 pm
SDU
-
STL
2 stops23h 47m
LATAM Airlines
Deal found 1/28$1,241
This Air Canada deal was found by Cheapflights users on 1/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 8/2612:10 pm
STL
-
SDU
2 stops26h 35m
Air Canada
qua 9/21:45 pm
SDU
-
STL
2 stops30h 42m
Air Canada
Deal found 1/28$1,253
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 6/1311:04 am
STL
-
SDU
2 stops27h 36m
GOL
sáb 6/209:45 am
SDU
-
STL
2 stops39h 00m
GOL
Deal found 1/27$1,261
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 4/98:21 am
STL
-
SDU
2 stops30h 24m
United Airlines
seg 4/131:45 pm
SDU
-
STL
2 stops21h 40m
United Airlines
Deal found 1/26$1,319
This United Airlines deal was found by Cheapflights users on 1/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 3/157:41 am
STL
-
SDU
2 stops31h 04m
United Airlines
dom 3/222:50 pm
SDU
-
STL
2 stops25h 52m
United Airlines
Deal found 1/29$1,379
This Air Canada deal was found by Cheapflights users on 1/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 2/184:05 pm
STL
-
SDU
2 stops19h 30m
Multiple Airlines
qua 2/258:15 am
SDU
-
STL
2 stops34h 14m
Multiple Airlines
Deal found 1/28$1,448
This GOL deal was found by Cheapflights users on 1/27. 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.
ter 2/36:02 pm
STL
-
SDU
2 stops37h 43m
GOL
dom 2/86:00 am
SDU
-
STL
2 stops20h 59m
GOL
Deal found 1/27$1,631
This GOL deal was found by Cheapflights users on 1/27. 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 3/2111:06 am
STL
-
SDU
2 stops21h 39m
GOL
dom 3/298:45 pm
SDU
-
STL
2 stops29h 13m
GOL
Deal found 1/27$1,813

Find 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 janeiro 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,225
(GOL)

One-way from

$325
(Trip.com)

Popular in

December

Cheapest in

May

Average price

$1,053
Provider with most accurate pricing for Lambert-St Louis-Rio de Janeiro (RIO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Rio de Janeiro (RIO) flights.
Search Deals
From Lambert-St Louis to Rio de Janeiro Santos Dumont
Search Deals
One-way flight from Lambert-St Louis to Rio de Janeiro Santos Dumont
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($158 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 janeiro 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

St. Louis

Fly to

Santos Dumont

Route

Depart

Return

Price

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

seg 3/30

11:22 am-10:55 am

2 stops21h 33m

Rio de Janeiro Santos Dumont

sex 4/10

8:45 pm-10:54 pm

2 stops28h 09m

$1,225

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

sáb 6/13

11:04 am-12:35 pm

2 stops23h 31m

Rio de Janeiro Santos Dumont

sáb 6/20

5:40 pm-10:45 pm

2 stops31h 05m

$1,261

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

qui 4/9

8:21 am-4:45 pm

2 stops30h 24m

Rio de Janeiro Santos Dumont

seg 4/13

1:45 pm-9:25 am

2 stops21h 40m

$1,319

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

dom 3/15

7:41 am-4:45 pm

2 stops31h 04m

Rio de Janeiro Santos Dumont

dom 3/22

2:50 pm-2:42 pm

2 stops25h 52m

$1,379

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

qua 2/18

4:05 pm-2:35 pm

2 stops19h 30m

Rio de Janeiro Santos Dumont

qua 2/25

8:15 am-3:29 pm

2 stops34h 14m

$1,448

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

sáb 3/21

11:06 am-10:45 am

2 stops21h 39m

Rio de Janeiro Santos Dumont

dom 3/29

8:45 pm-11:58 pm

2 stops29h 13m

$1,813

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

ter 3/31

12:04 pm-1:10 pm

2 stops23h 06m

Rio de Janeiro Santos Dumont

sáb 4/11

8:15 pm-3:13 pm

2 stops20h 58m

$3,121

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

dom 3/29

12:04 pm-8:35 am

2 stops18h 31m

Rio de Janeiro Santos Dumont

qui 4/9

8:20 pm-11:09 am

2 stops16h 49m

$7,121

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

qua 3/18

8:32 am-10:45 am

2 stops24h 13m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 United Airlines can get you from St. Louis to Rio de Janeiro Santos Dumont Airport in just under 21h 33m. Your travel time can differ by up to 8h 51m. 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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