STL - SDU

$525 Find Cheap Flights from St. Louis to Rio de Janeiro Santos Dumont

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Santos Dumont departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Rio de Janeiro Santos Dumont Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Rio de Janeiro, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Rio de Janeiro, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Santos Dumont (STL-SDU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Santos Dumont that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Santos Dumont

Sat, Nov 1 - Sat, Nov 8
Multiple Airlines Logo
7:15 pm - 7:05 amSTL-SDU
33h 50m2 stops
Multiple Airlines Logo
6:20 am - 11:01 amSDU-STL
31h 41m3 stops
$1,030Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Multiple Airlines Logo
7:15 pm - 7:05 amSTL-SDU
33h 50m2 stops
Multiple Airlines Logo
6:50 pm - 11:01 amSDU-STL
19h 11m2 stops
$1,049Multiple Airlines
Find Deal
Thu, Jan 22 - Tue, Feb 3
Air Canada Logo
4:05 pm - 2:20 pmSTL-SDU
19h 15m2 stops
Air Canada Logo
11:25 am - 3:29 pmSDU-STL
31h 04m2 stops
$1,106Air Canada
Find Deal
Sat, Nov 29 - Sun, Dec 7
United Airlines Logo
3:14 pm - 11:10 amSTL-SDU
16h 56m2 stops
United Airlines Logo
2:50 pm - 10:00 amSDU-STL
22h 10m2 stops
$1,296United Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
United Airlines Logo
10:30 am - 2:20 pmSTL-SDU
24h 50m2 stops
United Airlines Logo
2:50 pm - 10:14 pmSDU-STL
34h 24m2 stops
$1,306United Airlines
Find Deal
Wed, Feb 11 - Wed, Feb 18
Multiple Airlines Logo
4:05 pm - 10:20 pmSTL-SDU
27h 15m2 stops
Multiple Airlines Logo
11:25 am - 3:29 pmSDU-STL
31h 04m2 stops
$1,336Multiple Airlines
Find Deal
Wed, Feb 11 - Sun, Feb 15
United Airlines Logo
6:30 am - 2:20 pmSTL-SDU
28h 50m2 stops
United Airlines Logo
2:50 pm - 12:21 pmSDU-STL
24h 31m2 stops
$1,368United Airlines
Find Deal

Everything you should know

Cheapest round-trip
$1,030
Multiple Airlines
Sat 11/1Sat 11/8
STL - SDU • 2 stops
Cheapest one-way
$525
Multiple Airlines
Wed 10/1
STL - SDU • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Santos Dumont!
Booking Insights

KAYAK's insights & trends for St. Louis to Santos Dumont flights

Get data-powered insights and trends into flights from St. Louis to Santos Dumont to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Rio de Janeiro Santos Dumont?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Rio de Janeiro Santos Dumont were found on Air Canada ($1,106) and United Airlines ($1,296).

Find deals

Good to know

Cheapest flight$525
Flight from St. Louis to Rio de Janeiro Santos Dumont

When to book flights from St. Louis to Santos Dumont

Are your dates flexible? Find out the best times to travel from St. Louis to Santos Dumont based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Rio de Janeiro Santos Dumont flights

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

    In the last 3 days, the lowest price for a flight from St. Louis to Rio de Janeiro Santos Dumont Airport was $525 for a one-way ticket and $1,030 for a round-trip.

  • Do I need a passport to fly between St. Louis and Rio de Janeiro Santos Dumont?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Rio de Janeiro Santos Dumont.

  • Which aircraft models fly most regularly from St. Louis to Rio de Janeiro Santos Dumont?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Rio de Janeiro Santos Dumont?

    Star Alliance is the only airline alliance operating flights between St. Louis and Rio de Janeiro Santos Dumont.

  • How does KAYAK find such low prices on flights from St. Louis to Rio de Janeiro Santos Dumont?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Rio de Janeiro Santos Dumont.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Rio de Janeiro Santos Dumont?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rio de Janeiro Santos Dumont from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Rio de Janeiro Santos Dumont?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Rio de Janeiro Santos Dumont with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SDU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Rio de Janeiro Santos Dumont?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Rio de Janeiro Santos Dumont from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from St. Louis to Santos Dumont

Information on your arrival and departure airports

St. Louis (STL)
Santos Dumont (SDU)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.