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Cheap flights from St. Louis to Buenos Aires from $717

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Buenos Aires departing on 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Buenos Aires

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Buenos Aires that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Buenos Aires.

Cheap last minute flights

Planning a quick getaway from St. Louis to Buenos Aires? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Buenos Aires, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Buenos Aires

Find recent round-trip train or bus tickets from St. Louis to Buenos Aires.

All round-trip flight deals to Buenos Aires

The cheapest plane tickets to Buenos Aires found on KAYAK recently.
10:55 am - 7:20 amSTL-EZE
17h 25m1 stop
11:55 pm - 8:44 pmEZE-STL
23h 49m1 stop
$1,099United Airlines
Find Deal
Wed, Feb 5 - Wed, Feb 12
12:52 pm - 6:00 amSTL-EZE
38h 08m2 stops
3:55 am - 11:36 pmEZE-STL
22h 41m2 stops
$1,102LATAM Airlines
Find Deal
Thu, Feb 20 - Tue, Mar 4
10:55 am - 9:20 amSTL-EZE
19h 25m1 stop
10:05 pm - 12:12 pmEZE-STL
17h 07m2 stops
$1,103United Airlines
Find Deal
Wed, Feb 5 - Wed, Feb 12
6:00 am - 10:03 pmSTL-EZE
37h 03m2 stops
3:55 am - 11:37 pmEZE-STL
22h 42m2 stops
$1,199LATAM Airlines
Find Deal
Thu, Feb 6 - Wed, Feb 19
5:00 pm - 4:00 pmSTL-AEP
20h 00m2 stops
5:05 pm - 9:20 amAEP-STL
19h 15m2 stops
$1,239LATAM Airlines
Find Deal
Wed, Feb 5 - Wed, Feb 12
3:50 pm - 3:25 pmSTL-EZE
20h 35m2 stops
5:00 pm - 2:36 pmEZE-STL
24h 36m3 stops
$1,630Air Canada
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Thu, Feb 6 - Thu, Feb 20
9:44 am - 3:25 pmSTL-EZE
26h 41m3 stops
5:00 pm - 8:44 pmEZE-STL
30h 44m3 stops
$1,800Air Canada
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Thu, Feb 6 - Thu, Feb 20
5:13 am - 12:20 pmSTL-EZE
28h 07m2 stops
3:15 am - 11:40 pmEZE-STL
23h 25m2 stops
$2,538GOL
Find Deal
Sat, Feb 15 - Mon, Feb 24
10:59 am - 9:00 amSTL-EZE
19h 01m1 stop
10:25 pm - 4:37 pmEZE-STL
21h 12m2 stops
$5,424Delta
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Sat, Feb 15 - Tue, Feb 25
12:52 pm - 9:00 amSTL-EZE
17h 08m1 stop
9:00 pm - 9:20 amEZE-STL
15h 20m1 stop
$6,921Delta
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Sat, Feb 15 - Tue, Feb 25
12:52 pm - 9:00 amSTL-EZE
17h 08m1 stop
$717Delta
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Wed, Mar 5
10:35 am - 7:27 amSTL-EZE
17h 52m2 stops
$864Avianca
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Sat, Dec 28
10:35 am - 7:27 amSTL-EZE
17h 52m2 stops
$929Avianca
Find Deal
Sat, Dec 28
9:42 am - 7:15 amSTL-EZE
18h 33m1 stop
$957Delta
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Sat, Dec 28
5:17 pm - 9:00 amSTL-EZE
12h 43m1 stop
$1,007Delta
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Sat, Dec 28
1:03 pm - 3:25 pmSTL-EZE
23h 22m3 stops
$1,075
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Wed, Mar 5
5:00 am - 3:25 pmSTL-EZE
31h 25m3 stops
$1,361Air Canada
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Sat, Dec 28
6:25 am - 3:25 pmSTL-EZE
30h 00m3 stops
$1,547Air Canada
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Sat, Dec 28
5:00 am - 9:20 amSTL-EZE
25h 20m2 stops
10:05 pm - 11:59 pmEZE-STL
28h 54m1 stop
$1,635United Airlines
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Fri, Dec 27 - Wed, Jan 1
5:00 am - 7:20 amSTL-EZE
23h 20m2 stops
10:05 pm - 7:57 pmEZE-STL
24h 52m2 stops
$1,723United Airlines
Find Deal
Fri, Dec 27 - Wed, Jan 1
12:55 pm - 9:00 amSTL-EZE
17h 05m1 stop
9:30 am - 8:43 pmEZE-STL
14h 13m1 stop
$1,809Delta
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Fri, Dec 27 - Wed, Jan 1
3:24 pm - 4:00 pmSTL-AEP
21h 36m2 stops
8:00 pm - 6:22 pmAEP-STL
25h 22m2 stops
$1,977LATAM Airlines
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Fri, Dec 27 - Wed, Jan 1
6:00 am - 6:10 pmSTL-EZE
33h 10m2 stops
3:55 am - 6:22 pmEZE-STL
41h 27m2 stops
$1,984LATAM Airlines
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Fri, Dec 27 - Tue, Dec 31
3:50 pm - 6:50 amSTL-EZE
36h 00m3 stops
7:10 am - 3:21 pmEZE-STL
35h 11m3 stops
$2,344
Find Deal
Fri, Dec 27 - Wed, Jan 1
3:50 pm - 6:50 amSTL-EZE
36h 00m3 stops
3:55 am - 3:21 pmEZE-STL
38h 26m3 stops
$2,372
Find Deal
Fri, Dec 27 - Tue, Dec 31
5:17 pm - 7:11 pmSTL-EZE
22h 54m2 stops
7:10 am - 3:21 pmEZE-STL
35h 11m3 stops
$2,378
Find Deal
Fri, Dec 27 - Wed, Jan 1
5:17 pm - 7:11 pmSTL-EZE
22h 54m2 stops
3:55 am - 3:21 pmEZE-STL
38h 26m3 stops
$2,435
Find Deal
Fri, Dec 27 - Tue, Dec 31
5:17 pm - 10:40 pmSTL-AEP
26h 23m2 stops
11:45 am - 3:21 pmAEP-STL
30h 36m3 stops
$2,542
Find Deal
Fri, Dec 27 - Wed, Jan 1

LATAM Airlines flights from St. Louis to Buenos Aires

Our best LATAM Airlines deals on St. Louis to Buenos Aires flight tickets
LATAM Airlines
Feb 20
STL12:52 pmLambert-St Louis
38h 08m
2 stops
EZE6:00 amBuenos Aires Ministro Pistarini
Mar 4
EZE3:55 amBuenos Aires Ministro Pistarini
22h 41m
2 stops
STL11:36 pmLambert-St Louis
LATAM Airlines
Feb 6
STL6:00 amLambert-St Louis
37h 03m
2 stops
EZE10:03 pmBuenos Aires Ministro Pistarini
Feb 19
EZE3:55 amBuenos Aires Ministro Pistarini
22h 42m
2 stops
STL11:37 pmLambert-St Louis
LATAM Airlines
Feb 5
STL5:00 pmLambert-St Louis
20h 00m
2 stops
AEP4:00 pmBuenos Aires Jorge Newbery
Feb 12
AEP5:05 pmBuenos Aires Jorge Newbery
19h 15m
2 stops
STL9:20 amLambert-St Louis

Air Canada flights from St. Louis to Buenos Aires

Our best Air Canada deals on St. Louis to Buenos Aires flight tickets
Air Canada
Feb 6
STL3:50 pmLambert-St Louis
20h 35m
2 stops
EZE3:25 pmBuenos Aires Ministro Pistarini
Feb 20
EZE5:00 pmBuenos Aires Ministro Pistarini
24h 36m
3 stops
STL2:36 pmLambert-St Louis
Air Canada
Feb 6
STL9:44 amLambert-St Louis
26h 41m
3 stops
EZE3:25 pmBuenos Aires Ministro Pistarini
Feb 20
EZE5:00 pmBuenos Aires Ministro Pistarini
30h 44m
3 stops
STL8:44 pmLambert-St Louis
Air Canada
Feb 20
STL10:18 amLambert-St Louis
26h 07m
3 stops
EZE3:25 pmBuenos Aires Ministro Pistarini
Mar 5
EZE5:00 pmBuenos Aires Ministro Pistarini
25h 31m
3 stops
STL3:31 pmLambert-St Louis

See travel insights to Buenos Aires from

How to get the cheapest flight ticket from St. Louis to Buenos Aires

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from St. Louis is in August. Flight prices, which tend to average around $1,019, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Buenos Aires from St. Louis during September instead. Flights to Buenos Aires in September, while not as cheap as those in August, still average around $1,153.

What is the cheapest day to depart on your flight to Buenos Aires?

On average, the least expensive day to fly to Buenos Aires from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,163. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Friday is $1,386.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the evening. Flights from St. Louis to Buenos Aires during this time can be as low as $1,153. Try not to purchase tickets in the morning because they tend to be around $1,368. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on St. Louis to Buenos Aires flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Buenos Aires.

When to book flights from St. Louis to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Buenos Aires (STL to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Buenos Aires

Best Price Found

$717

Fastest flight time

12h 43m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from St. Louis in the past 72 hours is $717. The best round-trip flight deal from St. Louis to Buenos Aires found on momondo in the last 72 hours is $1,099.
The fastest flight from St. Louis to Buenos Aires takes 12h 43m
There are no direct flights from St. Louis to Buenos Aires. Popular non-direct routes for this connection are Lambert-St Louis Airport - Buenos Aires Ministro Pistarini Airport and Lambert-St Louis Airport - Buenos Aires Jorge Newbery Airport.
There are 2 airports near Buenos Aires: Buenos Aires Ministro Pistarini (EZE), Buenos Aires Jorge Newbery (AEP)

  • How far is Lambert-St Louis to Buenos Aires by plane?

    The straight-line distance from Lambert-St Louis to Buenos Aires is 5450.9 mi. Typically, this will take 17h 08m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Buenos Aires?

    Prices for flights from Lambert-St Louis Airport to Buenos Aires are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Buenos Aires?

  • How old do you have to be to fly from Lambert-St Louis Airport to Buenos Aires?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Buenos Aires?


Best airlines flying from St. Louis to Buenos Aires

Compare and see reviews for airlines that fly from St. Louis to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $814Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
DeltaPriceFrom $999Free CancellationRating
8.0
8,594 reviews
Search Delta flights
American AirlinesPriceFrom $999Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Buenos Aires?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Buenos Aires from St. Louis.

Can I find flights from St. Louis to Buenos Aires with flexible booking policies on momondo?

Yes. All flights to Buenos Aires from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Buenos Aires?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Buenos Aires from St. Louis.

I’m not ready to book a flight from St. Louis to Buenos Aires right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Buenos Aires from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires