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Cheap flights from Chicago to Buenos Aires from $271

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Buenos Aires departing on 12/23. 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 Chicago to Buenos Aires

Cheap round-trip flights

LATAM Airlines Logo
6:00 pm - 1:25 amORD-EZE
29h 25m2 stops
LATAM Airlines Logo
3:55 am - 11:54 pmEZE-ORD
21h 59m2 stops
$702LATAM Airlines
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Sun, Sep 7 - Sat, Sep 13
Arajet Logo
4:35 am - 12:05 amORD-EZE
16h 30m1 stop
Arajet Logo
11:07 am - 10:40 pmEZE-ORD
14h 33m1 stop
$800Arajet
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Tue, Dec 23 - Tue, Dec 30
Arajet Logo
4:35 am - 12:05 amORD-EZE
16h 30m1 stop
Arajet Logo
11:07 am - 10:40 pmEZE-ORD
14h 33m1 stop
$801Arajet
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Tue, Dec 23 - Tue, Dec 30
Logo
6:30 am - 5:30 pmORD-AEP
33h 00m3 stops
Logo
10:55 am - 9:58 pmAEP-ORD
37h 03m3 stops
$818
Find Deal
Thu, Sep 11 - Thu, Sep 18
Logo
6:30 am - 5:30 pmORD-AEP
33h 00m3 stops
Logo
9:50 am - 9:18 amAEP-ORD
25h 28m3 stops
$823
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Wed, Sep 24 - Wed, Oct 15
Logo
10:27 am - 10:07 amORD-EZE
20h 40m2 stops
Logo
9:15 pm - 9:23 pmEZE-ORD
27h 08m2 stops
$831
Find Deal
Mon, Nov 3 - Mon, Dec 15
Copa Airlines Logo
8:02 am - 12:55 amORD-EZE
14h 53m1 stop
Copa Airlines Logo
3:48 am - 12:21 amEZE-ORD
22h 33m1 stop
$886Copa Airlines
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Thu, Sep 18 - Sun, Sep 21
Copa Airlines Logo
7:55 am - 4:13 amORD-EZE
18h 18m1 stop
Copa Airlines Logo
3:48 am - 12:21 amEZE-ORD
22h 33m1 stop
$906Copa Airlines
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Fri, Aug 29 - Thu, Sep 4
Delta Logo
6:42 pm - 9:45 amMDW-EZE
13h 03m1 stop
Delta Logo
8:10 pm - 9:34 amEZE-MDW
15h 24m1 stop
$929Delta
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Thu, Aug 14 - Mon, Sep 8
Delta Logo
11:15 am - 9:45 amORD-EZE
20h 30m1 stop
Delta Logo
7:40 am - 11:54 pmEZE-ORD
18h 14m2 stops
$929Delta
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Thu, Aug 14 - Thu, Sep 11

Delta flights from Chicago to Buenos Aires

Our best Delta deals on Chicago to Buenos Aires flight tickets
Delta
Aug 14
MDW6:42 pmChicago Midway
13h 03m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Sep 8
EZE8:10 pmBuenos Aires Ministro Pistarini
15h 24m
1 stop
MDW9:34 amChicago Midway
$929
Find similar
Delta
Sep 16
MDW1:08 pmChicago Midway
18h 37m
2 stops
EZE9:45 amBuenos Aires Ministro Pistarini
Feb 17
EZE10:25 pmBuenos Aires Ministro Pistarini
21h 00m
2 stops
MDW4:25 pmChicago Midway
$934
Find similar
Delta
Sep 29
ORD5:30 amChicago O'Hare Intl
26h 15m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Oct 5
EZE3:55 amBuenos Aires Ministro Pistarini
22h 02m
2 stops
ORD11:57 pmChicago O'Hare Intl
$938
Find similar

Copa Airlines flights from Chicago to Buenos Aires

Our best Copa Airlines deals on Chicago to Buenos Aires flight tickets
Copa Airlines
Sep 18
ORD8:02 amChicago O'Hare Intl
14h 53m
1 stop
EZE12:55 amBuenos Aires Ministro Pistarini
Sep 21
EZE3:48 amBuenos Aires Ministro Pistarini
22h 33m
1 stop
ORD12:21 amChicago O'Hare Intl
$886
Find similar
Copa Airlines
Aug 29
ORD7:55 amChicago O'Hare Intl
18h 18m
1 stop
EZE4:13 amBuenos Aires Ministro Pistarini
Sep 4
EZE3:48 amBuenos Aires Ministro Pistarini
22h 33m
1 stop
ORD12:21 amChicago O'Hare Intl
$906
Find similar
Copa Airlines
Aug 25
ORD7:55 amChicago O'Hare Intl
14h 49m
1 stop
EZE12:44 amBuenos Aires Ministro Pistarini
Aug 30
EZE2:32 pmBuenos Aires Ministro Pistarini
35h 49m
1 stop
ORD12:21 amChicago O'Hare Intl
$917
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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, momondo users made 832,500 searches. Data last updated August 1, 2025.
Use the filters below to find and compare flights from Chicago to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 9/7

6:00 pm-1:25 am

2 stops29h 25m

Buenos Aires Ministro Pistarini

Sat 9/13

3:55 am-11:54 pm

2 stops21h 59m

$702

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 12/23

4:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

Tue 12/30

11:07 am-10:40 pm

1 stop14h 33m

$800

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 12/23

4:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

Tue 12/30

11:07 am-10:40 pm

1 stop14h 33m

$801

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 9/11

6:30 am-5:30 pm

3 stops33h 00m

Buenos Aires Jorge Newbery

Thu 9/18

10:55 am-9:58 pm

3 stops37h 03m

$818

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 9/24

6:30 am-5:30 pm

3 stops33h 00m

Buenos Aires Jorge Newbery

Wed 10/15

9:50 am-9:18 am

3 stops25h 28m

$823

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 11/3

10:27 am-10:07 am

2 stops20h 40m

Buenos Aires Ministro Pistarini

Mon 12/15

9:15 pm-9:23 pm

2 stops27h 08m

$831

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 9/18

8:02 am-12:55 am

1 stop14h 53m

Buenos Aires Ministro Pistarini

Sun 9/21

3:48 am-12:21 am

1 stop22h 33m

$886

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 8/29

7:55 am-4:13 am

1 stop18h 18m

Buenos Aires Ministro Pistarini

Thu 9/4

3:48 am-12:21 am

1 stop22h 33m

$906

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Thu 8/14

6:42 pm-9:45 am

1 stop13h 03m

Buenos Aires Ministro Pistarini

Mon 9/8

8:10 pm-9:34 am

1 stop15h 24m

$929

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 8/14

11:15 am-9:45 am

1 stop20h 30m

Buenos Aires Ministro Pistarini

Thu 9/11

7:40 am-11:54 pm

2 stops18h 14m

$929

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Chicago 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 typical price of a round-trip flight between Chicago and Buenos Aires?

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from Chicago is in September. Flight prices, which tend to average around $1,015, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from Chicago during July instead. Flights to Buenos Aires in July, while not as cheap as those in September, still average around $1,035.

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 Chicago is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,133. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Thursday is $1,268.

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 Chicago to Buenos Aires during this time can be as low as $1,103. Try not to purchase tickets at noon because they tend to be around $1,268. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Buenos Aires?

You are more likely to see cheaper flights to Buenos Aires from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,192 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Chicago for as low as $781 on momondo.

Can stopping save me money on Chicago to Buenos Aires flights?

You could potentially save up to 27% on your flight if you consider stops on a Chicago to Buenos Aires flight.

How have Chicago to Buenos Aires flight prices changed over time?

As of August 2025, prices for Chicago to Buenos Aires flights are approximately 17% more expensive when compared to flights at the same time last year.

When to book flights from Chicago to Buenos Aires

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

Cheap Chicago to Buenos Aires (CHI to BUE) flight deals and tips

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

Best Price Found

$271

Fastest flight time

13h 03m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from Chicago in the past 72 hours is $271. The best round-trip flight deal from Chicago to Buenos Aires found on momondo in the last 72 hours is $702.
The fastest flight from Chicago to Buenos Aires takes 13h 03m
There are no direct flights from Chicago to Buenos Aires. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Buenos Aires Jorge Newbery Airport, Chicago O'Hare Intl Airport - Buenos Aires Ministro Pistarini Airport and Chicago Midway Airport - Buenos Aires Jorge Newbery Airport.
There are 2 airports near Buenos Aires: Buenos Aires Ministro Pistarini (EZE), Buenos Aires Jorge Newbery (AEP)
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  • How far is Chicago to Buenos Aires by plane?

    A flight from Chicago to Buenos Aires will travel around 5596.4 mi. 13h 03m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Chicago to Buenos Aires?

    Prices for flights from Chicago to Buenos Aires are updated daily.

  • How many operators does momondo search for flights from Chicago to Buenos Aires?

  • How old do you have to be to fly from Chicago to Buenos Aires?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Buenos Aires.

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

    The travel and health documents you'll need for your trip to Buenos Aires may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buenos Aires. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Chicago to Buenos Aires?

Best airlines flying from Chicago to Buenos Aires

Compare and see reviews for airlines that fly from Chicago to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $699Free CancellationRating
7.5
1,493 reviews
Search Copa Airlines flights
AviancaPriceFrom $753Free CancellationRating
6.7
2,388 reviews
Search Avianca flights
DeltaPriceFrom $1,023Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $1,023Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $1,072Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago 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 Chicago.

Can I find flights from Chicago to Buenos Aires with flexible booking policies on momondo?

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

How can momondo help me find flights from Chicago to Buenos Aires?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to Buenos Aires.

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

Yes. momondo can track prices for Chicago to Buenos Aires flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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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
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport