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Santos Dumont

$368+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDU
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,332
(United Airlines)

One-way from

$368
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,227
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. 1% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 3, 2025.

This Ovago deal was found by Cheapflights users on 4/2. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:34 pmSTL - SDU
2 stops15h 06mGOL
Wed 11/125:40 pmSDU - STL
2 stops32h 21mGOL
Deal found 4/2$1,181
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Mon 8/46:15 pmSTL - SDU
2 stops43h 35mUnited Airlines
Mon 8/181:00 pmSDU - STL
2 stops28h 44mUnited Airlines
Deal found 4/2$1,332
This Air Canada deal was found by Cheapflights users on 4/2. 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.
Wed 6/251:30 pmSTL - SDU
2 stops24h 20mMultiple Airlines
Wed 7/97:55 amSDU - STL
2 stops38h 05mMultiple Airlines
Deal found 4/2$1,725

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 April 3, 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

Mon 8/4

6:15 pm-3:50 pm

2 stops43h 35m

Rio de Janeiro Santos Dumont

Mon 8/18

1:00 pm-3:44 pm

2 stops28h 44m

$1,332

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 6/25

1:30 pm-3:50 pm

2 stops24h 20m

Rio de Janeiro Santos Dumont

Wed 7/9

7:55 am-8:00 pm

2 stops38h 05m

$1,725

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Thu 6/12

5:45 pm-9:25 pm

3 stops49h 40m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Rio de Janeiro Santos Dumont Airport

Rainfall in Santos Dumont by month

Plan your trip to Santos Dumont by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Rio de Janeiro Santos Dumont Airport ranges from 1.6 - 5.1 inches per month. January is typically the wettest month, when rainfall can reach 5.1 in. July is typically the driest time to visit Rio de Janeiro Santos Dumont Airport when rainfall is around 1.6 in.

Temperature in Santos Dumont by month

Plan your trip to Santos Dumont by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Rio de Janeiro Santos Dumont Airport, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 69.8 F).

Reviews of airlines servicing Santos Dumont

Get insights into the airlines that provide service to Santos Dumont. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santos Dumont. Reviews last updated April 3, 2025.
United Airlines
7.4
Good
8,619 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.0

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,619 reviews
United Airlines
7.4
Good
8,619 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.0

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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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