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 are the most popular routes from Illinois to Rio de Janeiro Santos Dumont Airport?

While some choose either Chicago Midway - Rio de Janeiro Santos Dumont or Lambert-St Louis - Rio de Janeiro Santos Dumont, Chicago O'Hare Intl - Rio de Janeiro Santos Dumont is the most popular route from Illinois to Rio de Janeiro Santos Dumont Airport.

How far in advance should I book a flight from Illinois to Rio de Janeiro Santos Dumont Airport?

Travelers have found it’s best to book a flight 29 days in advance to save up to 34% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 29 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Illinois to Rio de Janeiro Santos Dumont Airport 1-2 weeks in advance for as low as $528, or $653 for flights within the next 24 hours.

What is the cheapest month to fly from Illinois to Rio de Janeiro Santos Dumont Airport?

The best pricing can be found in the month of September. Prices to Rio de Janeiro Santos Dumont Airport from Illinois average $779. You can even find prices in September for less than $779, as users have found deals to Rio de Janeiro Santos Dumont Airport from as low as $505. The month of December appears to be one of the more expensive times to travel to Rio de Janeiro Santos Dumont Airport from Illinois. Flying in the targeted month can save you up to 41%.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Rio de Janeiro Santos Dumont Airport as you normally would.

Can I find deals for flights from Illinois to Santos Dumont that include hotel bookings?

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

How can I find direct flights from Illinois to Santos Dumont?

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

Can I find deals for business class flights from Illinois to Santos Dumont?

Yes. Cheapflights offers flight deals from Illinois 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.

$269+ Flights from Illinois to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap flight deals from Illinois to Santos Dumont

Round-trip from	$649 (Mytrip)
One-way from	$269 (LATAM Airlines)
Popular in	December
Cheapest in	September
Average price	$681

From Illinois to Rio de Janeiro Santos Dumont

Search Deals

One-way flight from Illinois to Rio de Janeiro Santos Dumont

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($73 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

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Find flight deals from Illinois to Santos Dumont

Cheapest flights from Illinois to Santos Dumont
Explore the most affordable flight options available from Illinois to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2025.

Mon 9/86:44 pmORD - SDU

2 stops25h 41mMultiple Airlines

Tue 9/1611:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/3

$649

Wed 9/36:56 amORD - SDU

2 stops34h 29mMultiple Airlines

Wed 9/1011:25 amSDU - ORD

3 stops33h 25mMultiple Airlines

Deal found 8/4

$655

Thu 9/412:05 pmORD - SDU

2 stops26h 45mMultiple Airlines

Thu 9/1111:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/4

$656

Tue 9/236:44 pmORD - SDU

2 stops25h 41mMultiple Airlines

Fri 10/311:25 amSDU - ORD

3 stops37h 23mMultiple Airlines

Deal found 8/4

$659

Thu 10/21:00 pmORD - SDU

2 stops42h 35mLATAM Airlines

Sat 10/112:20 pmSDU - ORD

2 stops35h 37mLATAM Airlines

Deal found 8/4

$664

Tue 9/96:30 amORD - SDU

3 stops27h 55mMultiple Airlines

Mon 9/155:25 pmSDU - ORD

2 stops26h 14mMultiple Airlines

Deal found 8/5

$670

Mon 10/61:08 pmORD - SDU

2 stops23h 52mLATAM Airlines

Sun 10/193:50 pmSDU - ORD

2 stops24h 49mLATAM Airlines

Deal found 8/3

$672

Tue 10/1410:23 amORD - SDU

3 stops26h 37mMultiple Airlines

Thu 10/2311:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/3

$674

Sun 9/149:15 amSTL - SDU

2 stops27h 05mAir Canada

Tue 9/2311:25 amSDU - STL

2 stops29h 53mAir Canada

Deal found 8/5

$900

Sun 8/105:26 pmSTL - SDU

2 stops26h 59mMultiple Airlines

Sun 8/176:10 amSDU - STL

3 stops33h 22mMultiple Airlines

Deal found 8/3

$1,062

Fri 9/194:32 pmSTL - SDU

2 stops19h 48mMultiple Airlines

Fri 9/267:55 amSDU - STL

2 stops30h 33mMultiple Airlines

Deal found 8/4

$1,355

Fri 8/291:30 pmSTL - SDU

2 stops22h 50mAir Canada

Mon 9/87:55 amSDU - STL

2 stops38h 02mAir Canada

Deal found 8/5

$1,672

Best flights from Illinois to Santos Dumont
Discover carefully curated flight deals from Illinois to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2025.

Mon 9/86:44 pmORD - SDU

2 stops25h 41mMultiple Airlines

Tue 9/1611:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/3

$649

Thu 10/21:00 pmORD - SDU

2 stops42h 35mLATAM Airlines

Sat 10/112:20 pmSDU - ORD

2 stops35h 37mLATAM Airlines

Deal found 8/4

$664

Sun 9/149:15 amSTL - SDU

2 stops27h 05mAir Canada

Tue 9/2311:25 amSDU - STL

2 stops29h 53mAir Canada

Deal found 8/5

$900

Wed 9/36:56 amORD - SDU

2 stops34h 29mMultiple Airlines

Wed 9/1011:25 amSDU - ORD

3 stops33h 25mMultiple Airlines

Deal found 8/4

$655

Mon 10/61:08 pmORD - SDU

2 stops23h 52mLATAM Airlines

Sun 10/193:50 pmSDU - ORD

2 stops24h 49mLATAM Airlines

Deal found 8/3

$672

Thu 9/412:05 pmORD - SDU

2 stops26h 45mMultiple Airlines

Thu 9/1111:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/4

$656

Tue 9/236:44 pmORD - SDU

2 stops25h 41mMultiple Airlines

Fri 10/311:25 amSDU - ORD

3 stops37h 23mMultiple Airlines

Deal found 8/4

$659

Tue 9/96:30 amORD - SDU

3 stops27h 55mMultiple Airlines

Mon 9/155:25 pmSDU - ORD

2 stops26h 14mMultiple Airlines

Deal found 8/5

$670

Tue 10/1410:23 amORD - SDU

3 stops26h 37mMultiple Airlines

Thu 10/2311:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/3

$674

Fri 8/291:30 pmSTL - SDU

2 stops22h 50mAir Canada

Mon 9/87:55 amSDU - STL

2 stops38h 02mAir Canada

Deal found 8/5

$1,672

Fri 9/191:30 pmSTL - SDU

2 stops22h 50mAir Canada

Fri 9/2611:25 amSDU - STL

3 stops34h 32mAir Canada

Deal found 8/4

$1,763

Fri 9/194:32 pmSTL - SDU

2 stops19h 48mMultiple Airlines

Fri 9/267:55 amSDU - STL

2 stops30h 33mMultiple Airlines

Deal found 8/4

$1,355

Last-minute flights from Illinois to Santos Dumont
Discover last-minute flight deals from Illinois to Santos Dumont. Data last updated August 5, 2025 and is based on user searches.

Thu 8/74:00 pmSTL - SDU

2 stops19h 40mMultiple Airlines

Fri 8/1511:25 amSDU - STL

2 stops29h 56mMultiple Airlines

Deal found 8/5

$2,818

Sun 8/105:26 pmSTL - SDU

2 stops26h 59mMultiple Airlines

Sun 8/176:10 amSDU - STL

3 stops33h 22mMultiple Airlines

Deal found 8/3

$1,062

Mon 8/1110:00 amORD - SDU

2 stops22h 40mMultiple Airlines

Tue 8/2611:25 amSDU - ORD

3 stops23h 57mMultiple Airlines

Deal found 8/4

$1,134

Mon 8/112:32 pmORD - SDU

2 stops18h 08mGOL

Sat 8/306:10 amSDU - ORD

2 stops19h 47mGOL

Deal found 8/5

$1,607

Tue 8/125:40 pmORD - SDU

2 stops35h 25mMultiple Airlines

Sun 8/179:35 amSDU - ORD

3 stops40h 24mMultiple Airlines

Deal found 8/4

$992

Tue 8/126:00 amORD - SDU

2 stops30h 20mUnited Airlines

Sun 8/173:00 pmSDU - ORD

2 stops32h 33mUnited Airlines

Deal found 8/4

$1,070

Tue 8/1212:43 pmMDW - SDU

2 stops18h 52mLATAM Airlines

Sun 8/178:20 pmSDU - MDW

2 stops27h 24mLATAM Airlines

Deal found 8/5

$5,507

Tue 8/1212:43 pmMDW - SDU

2 stops22h 57mDelta

Sun 8/178:20 pmSDU - MDW

2 stops17h 28mDelta

Deal found 8/4

$7,012

Fri 8/291:30 pmSTL - SDU

2 stops22h 50mAir Canada

Mon 9/87:55 amSDU - STL

2 stops38h 02mAir Canada

Deal found 8/5

$1,672

Fri 8/299:15 amSTL - SDU

3 stops27h 05mMultiple Airlines

Mon 9/88:20 pmSDU - STL

3 stops25h 18mMultiple Airlines

Deal found 8/5

$2,015

Wed 9/36:56 amORD - SDU

2 stops34h 29mMultiple Airlines

Wed 9/1011:25 amSDU - ORD

3 stops33h 25mMultiple Airlines

Deal found 8/4

$655

Thu 9/412:05 pmORD - SDU

2 stops26h 45mMultiple Airlines

Thu 9/1111:25 amSDU - ORD

3 stops36h 33mMultiple Airlines

Deal found 8/4

$656

One-way flights from Illinois to Santos Dumont
Search for one-way flight options from Illinois to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated August 5, 2025.

Wed 8/2710:31 amMDW - SDU

2 stops21h 04mLATAM Airlines

Deal found 8/5

$269

Fri 9/191:00 pmORD - SDU

2 stops22h 55mLATAM Airlines

Deal found 8/3

$285

Thu 9/186:44 pmORD - SDU

2 stops25h 41mMultiple Airlines

Deal found 8/3

$307

Wed 10/112:43 pmMDW - SDU

2 stops23h 17mLATAM Airlines

Deal found 8/3

$320

Wed 10/111:20 amORD - SDU

2 stops24h 40mLATAM Airlines

Deal found 8/3

$320

Fri 9/1912:43 pmMDW - SDU

2 stops23h 12mLATAM Airlines

Deal found 8/3

$323

Sat 9/276:30 amORD - SDU

3 stops53h 30mMultiple Airlines

Deal found 8/3

$325

Mon 8/256:56 amORD - SDU

3 stops23h 44mMultiple Airlines

Deal found 8/3

$331

Tue 8/195:05 amORD - SDU

3 stops29h 45mMultiple Airlines

Deal found 8/3

$337

Sun 8/246:56 amORD - SDU

2 stops28h 04mMultiple Airlines

Deal found 8/3

$340

Fri 9/199:48 amMDW - SDU

3 stops44h 47mMultiple Airlines

Deal found 8/3

$341

Fri 8/228:12 pmORD - SDU

2 stops23h 13mMultiple Airlines

Deal found 8/3

$341

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Mon 9/8

6:44 pm-10:25 pm

2 stops25h 41m

Rio de Janeiro Santos Dumont

Tue 9/16

11:25 am-9:58 pm

3 stops36h 33m

$649

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Wed 9/3

6:56 am-7:25 pm

2 stops34h 29m

Rio de Janeiro Santos Dumont

Wed 9/10

11:25 am-6:50 pm

3 stops33h 25m

$655

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Thu 9/4

12:05 pm-4:50 pm

2 stops26h 45m

Rio de Janeiro Santos Dumont

Thu 9/11

11:25 am-9:58 pm

3 stops36h 33m

$656

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Tue 9/23

6:44 pm-10:25 pm

2 stops25h 41m

Rio de Janeiro Santos Dumont

Fri 10/3

11:25 am-10:48 pm

3 stops37h 23m

$659

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Thu 10/2

1:00 pm-9:35 am

2 stops42h 35m

Rio de Janeiro Santos Dumont

Sat 10/11

2:20 pm-11:57 pm

2 stops35h 37m

$664

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Tue 9/9

6:30 am-12:25 pm

3 stops27h 55m

Rio de Janeiro Santos Dumont

Mon 9/15

5:25 pm-5:39 pm

2 stops26h 14m

$670

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Mon 10/6

1:08 pm-3:00 pm

2 stops23h 52m

Rio de Janeiro Santos Dumont

Sun 10/19

3:50 pm-2:39 pm

2 stops24h 49m

$672

ChicagoRio de Janeiro

ORD - SDU

ORDSDU

Chicago O'Hare Intl

Tue 10/14

10:23 am-3:00 pm

3 stops26h 37m

Rio de Janeiro Santos Dumont

Thu 10/23

11:25 am-9:58 pm

3 stops36h 33m

$674

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Sun 9/14

9:15 am-2:20 pm

2 stops27h 05m

Rio de Janeiro Santos Dumont

Tue 9/23

11:25 am-3:18 pm

2 stops29h 53m

$900

St. LouisRio de Janeiro

STL - SDU

STLSDU

Lambert-St Louis

Fri 9/19

4:32 pm-2:20 pm

2 stops19h 48m

Rio de Janeiro Santos Dumont

Fri 9/26

7:55 am-12:28 pm

2 stops30h 33m

$1,355

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 45 results

...

Best time to book a flight from Illinois to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Illinois 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 Illinois to Rio de Janeiro Santos Dumont Airport

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Santos Dumont

See what other customers who have flown with Delta, LATAM Airlines, and United Airlines from Illinois to Rio de Janeiro Santos Dumont Airport have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,985 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

7,985 reviews

Delta

8.0

Very good

7,985 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

1,831 reviews

Delta

8.0

Very good

7,985 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!

United Airlines

7.4

Good

8,916 reviews

Delta

8.0

Very good

7,985 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!

GOL

7.3

Good

1,091 reviews

Delta

8.0

Very good

7,985 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

9,890 reviews

Delta

8.0

Very good

7,985 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 are the most popular routes from Illinois to Rio de Janeiro Santos Dumont Airport?
While some choose either Chicago Midway - Rio de Janeiro Santos Dumont or Lambert-St Louis - Rio de Janeiro Santos Dumont, Chicago O'Hare Intl - Rio de Janeiro Santos Dumont is the most popular route from Illinois to Rio de Janeiro Santos Dumont Airport.
Can I find deals for flights from Illinois to Santos Dumont that include hotel bookings?
Yes. In addition to deals on Illinois to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Santos Dumont?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Santos Dumont.
Can I find deals for business class flights from Illinois to Santos Dumont?
Yes. Cheapflights offers flight deals from Illinois 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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$269+ Cheap flights from Illinois 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Santos Dumont with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Illinois to Santos Dumont

Keep the following information in mind while searching for Illinois to Santos Dumont flight deals. Data was last updated August 5, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Illinois to Santos Dumont

Cheapest flights from Illinois to Santos DumontExplore the most affordable flight options available from Illinois to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2025.

Explore the most affordable flight options available from Illinois to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Illinois to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Rio de Janeiro Santos Dumont Airport

Reviews of airlines servicing Santos Dumont

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 are the most popular routes from Illinois to Rio de Janeiro Santos Dumont Airport?

Can I find deals for flights from Illinois to Santos Dumont that include hotel bookings?

How can I find direct flights from Illinois to Santos Dumont?

Can I find deals for business class flights from Illinois to Santos Dumont?

Browse thousands of different options on Cheapflights for your next trip

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Cheapest flights from Illinois to Santos Dumont
Explore the most affordable flight options available from Illinois to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2025.