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.

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).

What is the cheapest month to fly from St. Louis to Rio de Janeiro Santos Dumont Airport?

Flights from St. Louis to Rio de Janeiro Santos Dumont Airport lean towards being more expensive in December. Prices are generally better when you fly from St. Louis to Rio de Janeiro Santos Dumont Airport in May, with the cheapest ticket starting at $759.

What is the cheapest time of day to fly from STL to SDU?

When flying from St. Louis to Rio de Janeiro Santos Dumont Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

$641+ Flights from St. Louis to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap flight deals from St. Louis to Santos Dumont

Round-trip from	$892 (Air Canada)
One-way from	$641 (FlightHub)
Popular in	December
Cheapest in	May
Average price	$1,347

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 ($108 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).

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Average for round-trip flights in July 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 July 29, 2025.

Wed 10/151:30 pmSTL - SDU

2 stops22h 50mAir Canada

Thu 10/238:20 amSDU - STL

2 stops32h 58mAir Canada

Deal found 7/26

$892

Wed 9/101:10 pmSTL - SDU

2 stops23h 10mMultiple Airlines

Wed 9/1711:25 amSDU - STL

2 stops25h 15mMultiple Airlines

Deal found 7/27

$1,290

Wed 12/171:30 pmSTL - SDU

2 stops20h 45mLATAM Airlines

Sat 12/278:05 pmSDU - STL

2 stops25h 19mLATAM Airlines

Deal found 7/28

$2,604

Sat 12/205:17 pmSTL - SDU

2 stops16h 58mDelta

Sun 12/288:05 pmSDU - STL

2 stops15h 59mDelta

Deal found 7/28

$5,007

Best flights from St. Louis to Santos Dumont
Discover carefully curated flight deals from St. Louis to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Wed 10/151:30 pmSTL - SDU

2 stops22h 50mAir Canada

Thu 10/238:20 amSDU - STL

2 stops32h 58mAir Canada

Deal found 7/26

$892

Wed 9/101:10 pmSTL - SDU

2 stops23h 10mMultiple Airlines

Wed 9/1711:25 amSDU - STL

2 stops25h 15mMultiple Airlines

Deal found 7/27

$1,290

Wed 12/171:30 pmSTL - SDU

2 stops20h 45mLATAM Airlines

Sat 12/278:05 pmSDU - STL

2 stops25h 19mLATAM Airlines

Deal found 7/28

$2,604

Sat 12/205:17 pmSTL - SDU

2 stops16h 58mDelta

Sun 12/288:05 pmSDU - STL

2 stops15h 59mDelta

Deal found 7/28

$5,007

Last-minute flights from St. Louis to Santos Dumont
Discover last-minute flight deals from St. Louis to Santos Dumont. Data last updated July 29, 2025 and is based on user searches.

Fri 8/110:47 amSTL - SDU

3 stops21h 53mMultiple Airlines

Sun 8/36:10 amSDU - STL

3 stops29h 42mMultiple Airlines

Deal found 7/28

$1,870

Fri 8/11:30 pmSTL - SDU

2 stops22h 50mAir Canada

Sun 8/311:25 amSDU - STL

2 stops34h 20mAir Canada

Deal found 7/28

$2,581

One-way flights from St. Louis to Santos Dumont
Search for one-way flight options from St. Louis to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Tue 9/169:15 amSTL - SDU

2 stops27h 05mAir Canada

Deal found 7/28

$641

Sun 8/35:23 pmSTL - SDU

2 stops23h 37mLATAM Airlines

Deal found 7/27

$787

Cheapflights Fare Finder

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

Wed 10/15

1:30 pm-2:20 pm

2 stops22h 50m

Rio de Janeiro Santos Dumont

Thu 10/23

8:20 am-3:18 pm

2 stops32h 58m

$892

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 9/10

1:10 pm-2:20 pm

2 stops23h 10m

Rio de Janeiro Santos Dumont

Wed 9/17

11:25 am-10:40 am

2 stops25h 15m

$1,290

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Wed 12/17

1:30 pm-1:15 pm

2 stops20h 45m

Rio de Janeiro Santos Dumont

Sat 12/27

8:05 pm-6:24 pm

2 stops25h 19m

$2,604

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sat 12/20

5:17 pm-1:15 pm

2 stops16h 58m

Rio de Janeiro Santos Dumont

Sun 12/28

8:05 pm-9:04 am

2 stops15h 59m

$5,007

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Tue 9/16

9:15 am-2:20 pm

2 stops27h 05m

$641

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 8/3

5:23 pm-7:00 pm

2 stops23h 37m

$787

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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.

Reviews of airlines servicing Santos Dumont

Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and Air Canada from St. Louis to Rio de Janeiro Santos Dumont Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,977 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

LATAM Airlines

7.5

Good

1,821 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

9,822 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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.

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$641+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Santos Dumont with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Santos Dumont

Round-trip from

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Cheapest in

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Find flight deals from St. Louis to Santos Dumont

Cheapest flights from St. Louis to Santos DumontExplore 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 July 29, 2025.

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 July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Rio de Janeiro Santos Dumont Airport that are best for you.

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.

Reviews of airlines servicing Santos Dumont

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?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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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 July 29, 2025.