$350+ Cheap flights from Missouri to Buenos Aires (BUE)
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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUE
Nov 29 — Dec 61
1 adult, Economy
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Cheapest flights from Missouri to Buenos AiresExplore the most affordable flight options available from Missouri to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.
Explore the most affordable flight options available from Missouri to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.
This LATAM Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:33 amSTL - AEP
2 stops19h 22mLATAM Airlines
Tue 12/22:55 pmAEP - STL
2 stops20h 29mLATAM Airlines
Deal found 10/29![LATAM Airlines logo]()
$830
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/189:33 amSTL - EZE
2 stops17h 47mDelta
Wed 11/268:55 pmEZE - STL
1 stop16h 04mDelta
Deal found 10/29![Delta logo]()
$830
This KAYAK deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/189:33 amSTL - AEP
2 stops26h 07mLATAM Airlines
Wed 11/268:50 amAEP - STL
2 stops36h 45mLATAM Airlines
Deal found 10/29![LATAM Airlines logo]()
$855
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/19:33 amSTL - EZE
1 stop20h 27mDelta
Sat 12/1311:55 pmEZE - STL
1 stop13h 50mDelta
Deal found 10/28![Delta logo]()
$880
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:20 amSTL - EZE
1 stop17h 00mUnited Airlines
Sat 12/1310:05 pmEZE - STL
2 stops17h 10mUnited Airlines
Deal found 10/28![United Airlines logo]()
$884
This Expedia deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/11:55 pmSTL - EZE
2 stops33h 55mLATAM Airlines
Fri 12/122:25 amEZE - STL
2 stops35h 20mLATAM Airlines
Deal found 10/28![LATAM Airlines logo]()
$910
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:20 amSTL - EZE
1 stop20h 00mUnited Airlines
Thu 12/410:05 pmEZE - STL
1 stop20h 59mUnited Airlines
Deal found 10/30![United Airlines logo]()
$915
This Gurufare deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:33 amSTL - EZE
2 stops36h 27mLATAM Airlines
Thu 12/47:45 amEZE - STL
2 stops18h 57mLATAM Airlines
Deal found 10/30![LATAM Airlines logo]()
$927
This LATAM Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:12 pmSTL - AEP
2 stops17h 48mLATAM Airlines
Sun 12/143:40 pmAEP - STL
2 stops19h 44mLATAM Airlines
Deal found 10/28![LATAM Airlines logo]()
$930
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:11 pmSTL - EZE
1 stop15h 49mDelta
Sun 12/1411:55 pmEZE - STL
1 stop21h 01mDelta
Deal found 10/28![Delta logo]()
$930
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:25 amSTL - EZE
2 stops18h 55mUnited Airlines
Sun 12/1410:05 pmEZE - STL
1 stop14h 55mUnited Airlines
Deal found 10/28![United Airlines logo]()
$934
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:01 pmMCI - EZE
3 stops31h 09mMultiple Airlines
Sun 12/148:00 amEZE - MCI
3 stops36h 56mMultiple Airlines
Deal found 10/30![Multiple Airlines logo]()
$952
Cheap flight deals from Missouri to Buenos Aires
Keep the following information in mind while searching for Missouri to Buenos Aires flight deals. Data was last updated October 30, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $830 (LATAM Airlines) |
One-way from | $350 (Mytrip) |
Popular in | November |
Cheapest in | September |
Average price | $1,160 |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Missouri to Buenos Aires that are best for you.
Fly from
Missouri
Fly to
Buenos Aires
Route
Depart
Return
Price
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Tue 11/25
9:33 am-7:55 am
2 stops19h 22m
Buenos Aires Jorge Newbery
Tue 12/2
2:55 pm-8:24 am
2 stops20h 29m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Wed 2/11
9:59 am-9:00 am
1 stop20h 01m
Buenos Aires Ministro Pistarini
Mon 3/9
8:55 pm-3:01 pm
1 stop20h 06m
$830
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Mon 1/12
3:45 pm-6:40 pm
2 stops23h 55m
Buenos Aires Jorge Newbery
Tue 3/24
5:15 pm-6:04 pm
2 stops26h 49m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Mon 2/9
9:59 am-9:00 am
1 stop20h 01m
Buenos Aires Ministro Pistarini
Mon 3/9
8:55 pm-9:04 am
1 stop14h 09m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Mon 2/9
7:10 am-9:00 am
1 stop22h 50m
Buenos Aires Ministro Pistarini
Wed 3/11
8:00 am-11:40 pm
2 stops17h 40m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Wed 2/11
5:04 pm-9:00 am
1 stop12h 56m
Buenos Aires Ministro Pistarini
Thu 3/5
11:55 pm-6:04 pm
1 stop21h 09m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Wed 2/11
9:59 am-9:00 am
1 stop20h 01m
Buenos Aires Ministro Pistarini
Tue 3/10
8:00 am-11:40 pm
2 stops17h 40m
$830
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Sun 2/8
6:40 pm-9:20 am
2 stops35h 40m
Buenos Aires Ministro Pistarini
Thu 3/5
11:55 pm-9:50 pm
2 stops24h 55m
$849
St. LouisBuenos Aires
STL - AEP
STLAEP
Lambert-St Louis
Sun 3/8
7:05 pm-5:00 pm
2 stops19h 55m
Buenos Aires Jorge Newbery
Tue 3/17
5:15 pm-10:50 am
2 stops19h 35m
$880
St. LouisBuenos Aires
STL - EZE
STLEZE
Lambert-St Louis
Sun 2/8
1:00 pm-9:00 am
1 stop17h 00m
Buenos Aires Ministro Pistarini
Thu 3/5
11:55 pm-10:50 am
1 stop13h 55m
$880
Showing 1-10 of 32 results
Best time to book a flight from Missouri to Buenos Aires
Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Missouri 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 Missouri to Buenos Aires
What is the cheapest time of day to fly from MO to BUE?
Find hourly flight availability from Missouri to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.
It’s typically best to fly out from Missouri to Buenos Aires in the evening. Doing so could potentially save you 8% on the flight price compared to flying in the afternoon, which is usually more expensive.
Related info for your journey
Find useful and relevant information for your journey from Missouri to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Missouri to Buenos Aires
See prices for flight routes from nearby airports that may be better suited for you.
Top 3 airlines flying from Missouri to Buenos Aires
Discover the top 3 airlines that operate flights from Missouri to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$1,023 | Average$1,287 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,025 | Average$1,284 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$1,081 | Average$1,335 | FlexibilityNo cancel fee | On-time69% |