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Santos Dumont

$1,005+ Cheap flights from St. Louis (STL) to Santos Dumont, Brazil (SDU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDU
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
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 octubre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,005
(GOL)

Popular in

December

Cheapest in

May

Average price

$1,079
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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Highest demand for flights based on searches. 10% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octubre 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/208:20 amSTL - SDU
2 stops29h 20mUnited Airlines
mié. 12/31:45 pmSDU - STL
2 stops25h 30mUnited Airlines
Deal found 10/28$1,372
This Ticket deal was found by Cheapflights users on 10/27. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/84:05 pmSTL - SDU
2 stops21h 30mAir Canada
mié. 12/2411:20 amSDU - STL
2 stops31h 09mAir Canada
Deal found 10/27$1,668
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1811:51 amSTL - SDU
3 stops19h 54mMultiple Airlines
vie. 1/96:50 pmSDU - STL
2 stops22h 03mMultiple Airlines
Deal found 10/27$1,669
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/208:00 amSTL - SDU
3 stops29h 40mMultiple Airlines
mié. 12/36:50 pmSDU - STL
2 stops22h 02mMultiple Airlines
Deal found 10/28$1,870
This Gurufare deal was found by Cheapflights users on 10/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/226:00 pmSTL - SDU
2 stops25h 25mGOL
vie. 1/911:35 amSDU - STL
2 stops24h 33mGOL
Deal found 10/27$1,894
This GOL deal was found by Cheapflights users on 10/27. 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.
jue. 12/186:00 pmSTL - SDU
2 stops35h 55mGOL
vie. 1/911:35 amSDU - STL
2 stops24h 33mGOL
Deal found 10/27$2,028
This Priceline deal was found by Cheapflights users on 10/27. 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.
jue. 12/112:11 pmSTL - SDU
2 stops20h 04mMultiple Airlines
lun. 12/2912:20 pmSDU - STL
2 stops30h 09mMultiple Airlines
Deal found 10/27$2,072
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/2511:51 amSTL - SDU
3 stops19h 54mMultiple Airlines
sáb. 1/36:05 amSDU - STL
3 stops31h 51mMultiple Airlines
Deal found 10/28$2,104
This GOL deal was found by Cheapflights users on 10/28. 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 GOL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/306:00 pmSTL - SDU
2 stops35h 55mGOL
mar. 1/68:25 pmSDU - STL
2 stops30h 34mGOL
Deal found 10/28$2,207
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/104:05 pmSTL - SDU
2 stops21h 35mMultiple Airlines
dom. 12/282:00 pmSDU - STL
2 stops28h 29mMultiple Airlines
Deal found 10/27$2,247
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/174:05 pmSTL - SDU
2 stops19h 25mAir Canada
mar. 12/3011:20 amSDU - STL
2 stops31h 09mAir Canada
Deal found 10/27$4,576

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 octubre 28, 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

lun. 2/2

6:02 pm-10:25 pm

2 stops25h 23m

Rio de Janeiro Santos Dumont

mar. 2/17

11:35 am-10:27 am

2 stops25h 52m

$1,005

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

mié. 2/18

4:59 pm-10:25 pm

2 stops26h 26m

Rio de Janeiro Santos Dumont

dom. 2/22

6:00 am-10:29 am

2 stops31h 29m

$1,052

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 11/20

8:20 am-4:40 pm

2 stops29h 20m

Rio de Janeiro Santos Dumont

mié. 12/3

1:45 pm-12:15 pm

2 stops25h 30m

$1,372

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 2/12

11:19 am-10:45 am

2 stops20h 26m

Rio de Janeiro Santos Dumont

lun. 2/16

8:25 pm-10:05 pm

2 stops28h 40m

$1,442

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

lun. 12/8

4:05 pm-4:35 pm

2 stops21h 30m

Rio de Janeiro Santos Dumont

mié. 12/24

11:20 am-3:29 pm

2 stops31h 09m

$1,668

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 12/18

11:51 am-10:45 am

3 stops19h 54m

Rio de Janeiro Santos Dumont

vie. 1/9

6:50 pm-1:53 pm

2 stops22h 03m

$1,669

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 11/20

8:00 am-4:40 pm

3 stops29h 40m

Rio de Janeiro Santos Dumont

mié. 12/3

6:50 pm-1:52 pm

2 stops22h 02m

$1,870

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

lun. 12/22

6:00 pm-10:25 pm

2 stops25h 25m

Rio de Janeiro Santos Dumont

vie. 1/9

11:35 am-9:08 am

2 stops24h 33m

$1,894

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

vie. 1/9

11:35 am-9:08 am

2 stops24h 33m

$2,028

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

jue. 12/25

11:51 am-10:45 am

3 stops19h 54m

Rio de Janeiro Santos Dumont

sáb. 1/3

6:05 am-10:56 am

3 stops31h 51m

$2,104

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

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 25h 23m. Your travel time can differ by up to 3h 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

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