Cheap flights from St. Louis, MO to Buenos Aires, Argentina

Flights starting at $346. Choose between Spirit Airlines, Avianca, or Frontier Airlines to find the best price.

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Tips to know when travelling to Buenos Aires

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Book your trip to arrive at Ministro Pistarini International, or Aeroparque Jorge Newbery. The most popular airlines for this route are Spirit Airlines, Avianca, Frontier Airlines, Aerolineas Argentinas, and Copa Airlines. St. Louis and Buenos Aires have 175 direct flights per week. When you arrive at Buenos Aires, consider visiting Recoleta, and La Boca, Buenos Aires.

Check-in for a flight from St. Louis to Buenos Aires

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
AviancaAVAAVNoOpens 48 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Aerolineas ArgentinasARGARYesNo
Copa AirlinesCMPCMYes0
0

Weather in Buenos Aires

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January29°C21°C
February28°C20°C
March25°C18°C
April22°C15°C
May18°C12°C
June14°C9°C
July13°C8°C
August15°C9°C
September17°C11°C
October20°C13°C
November24°C16°C
December27°C19°C
Hottest Month
29°C
January
Coldest month
8°C
July
Sunny days
304
days per year

14 day forecast

Thursday
21 Mar
88%
20°C14°C
28 Mar
24°C20°C
Friday
22 Mar
20°C15°C
29 Mar
27°C20°C
Saturday
23 Mar
23°C17°C
30 Mar
85%
24°C19°C
Sunday
24 Mar
25°C18°C
31 Mar
65%
17°C15°C
Monday
25 Mar
24°C20°C
1 Apr
85%
20°C17°C
Tuesday
26 Mar
24°C19°C
2 Apr
80%
21°C17°C
Wednesday
27 Mar
24°C20°C
3 Apr
19°C12°C

Frequently asked questions

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What airports are near St. Louis?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Buenos Aires?
What is Virtual Interlining and how do I use it?
Which airlines fly between St. Louis and Buenos Aires?
When's the best time to travel between St. Louis and Buenos Aires?
What flights operate between St. Louis and Buenos Aires?
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What time do nonstop (direct) flights between St. Louis and Buenos Aires depart?
What time do nonstop (direct) flights between St. Louis and Buenos Aires arrive?
What time do flights between St. Louis and Buenos Aires depart?
What time do flights between St. Louis and Buenos Aires arrive?

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