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Cheap flights from Chicago O'Hare Intl Airport to Buenos Aires from $319

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 O'Hare Intl Airport 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 O'Hare Intl Airport to Buenos Aires

Cheap round-trip flights

Arajet Logo
4:35 am - 12:05 amORD-EZE
16h 30m1 stop
Arajet Logo
9:15 pm - 8:57 amEZE-ORD
14h 42m1 stop
$802Arajet
Find Deal
Tue, Nov 18 - Fri, Dec 12
Logo
6:30 am - 11:20 pmORD-AEP
38h 50m3 stops
Logo
10:30 am - 9:22 amAEP-ORD
24h 52m3 stops
$814
Find Deal
Tue, Sep 30 - Tue, Oct 7
Logo
8:02 am - 9:20 amORD-AEP
23h 18m2 stops
Logo
6:20 am - 1:41 pmAEP-ORD
33h 21m2 stops
$821
Find Deal
Mon, Sep 29 - Mon, Oct 6
Logo
4:35 am - 12:05 amORD-EZE
16h 30m1 stop
Logo
7:35 am - 12:30 pmEZE-ORD
31h 55m2 stops
$831
Find Deal
Tue, Nov 18 - Fri, Dec 12
Air Canada Logo
9:20 pm - 3:10 pmORD-EZE
39h 50m2 stops
Air Canada Logo
4:45 pm - 7:30 pmEZE-ORD
29h 45m2 stops
$876Air Canada
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Mon, Oct 27 - Mon, Nov 17
Air Canada Logo
3:35 pm - 3:10 pmORD-EZE
20h 35m2 stops
Air Canada Logo
4:45 pm - 11:18 amEZE-ORD
21h 33m2 stops
$905Air Canada
Find Deal
Sat, Nov 15 - Sat, Nov 22
Copa Airlines Logo
7:53 am - 12:55 amORD-EZE
15h 02m1 stop
Copa Airlines Logo
3:57 am - 12:05 amEZE-ORD
23h 08m1 stop
$918Copa Airlines
Find Deal
Wed, Oct 8 - Tue, Nov 18
Copa Airlines Logo
3:07 pm - 7:54 amORD-EZE
14h 47m1 stop
Copa Airlines Logo
3:57 am - 12:05 amEZE-ORD
23h 08m1 stop
$938Copa Airlines
Find Deal
Tue, Oct 28 - Sun, Nov 9
Avianca Logo
11:20 pm - 5:40 amORD-AEP
28h 20m1 stop
Avianca Logo
7:00 am - 8:20 pmAEP-ORD
16h 20m1 stop
$1,007Avianca
Find Deal
Sun, Oct 26 - Sun, Nov 2
LATAM Airlines Logo
1:08 pm - 11:40 amORD-AEP
19h 32m2 stops
LATAM Airlines Logo
5:15 pm - 10:03 amAEP-ORD
19h 48m2 stops
$1,015LATAM Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12

Arajet flights from Chicago O'Hare Intl Airport to Buenos Aires

Our best Arajet deals on Chicago O'Hare Intl Airport to Buenos Aires flight tickets
Arajet
Nov 18
ORD4:35 amChicago O'Hare Intl
16h 30m
1 stop
EZE12:05 amBuenos Aires Ministro Pistarini
Dec 12
EZE9:15 pmBuenos Aires Ministro Pistarini
14h 42m
1 stop
ORD8:57 amChicago O'Hare Intl
$802
Find similar
Arajet
Dec 21
ORD3:30 amChicago O'Hare Intl
13h 45m
1 stop
EZE8:15 pmBuenos Aires Ministro Pistarini
Jan 11
EZE8:40 amBuenos Aires Ministro Pistarini
15h 30m
1 stop
ORD9:10 pmChicago O'Hare Intl
$914
Find similar

Air Canada flights from Chicago O'Hare Intl Airport to Buenos Aires

Our best Air Canada deals on Chicago O'Hare Intl Airport to Buenos Aires flight tickets
Air Canada
Oct 27
ORD9:20 pmChicago O'Hare Intl
39h 50m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Nov 17
EZE4:45 pmBuenos Aires Ministro Pistarini
29h 45m
2 stops
ORD7:30 pmChicago O'Hare Intl
$876
Find similar
Air Canada
Nov 15
ORD3:35 pmChicago O'Hare Intl
20h 35m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Nov 22
EZE4:45 pmBuenos Aires Ministro Pistarini
21h 33m
2 stops
ORD11:18 amChicago O'Hare Intl
$905
Find similar
Air Canada
Oct 25
ORD3:35 pmChicago O'Hare Intl
21h 35m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Nov 10
EZE4:45 pmBuenos Aires Ministro Pistarini
21h 33m
2 stops
ORD11:18 amChicago O'Hare Intl
$906
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 17, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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

Tue 11/18

4:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

Fri 12/12

9:15 pm-8:57 am

1 stop14h 42m

$802

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Tue 9/30

6:30 am-11:20 pm

3 stops38h 50m

Buenos Aires Jorge Newbery

Tue 10/7

10:30 am-9:22 am

3 stops24h 52m

$814

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Mon 9/29

8:02 am-9:20 am

2 stops23h 18m

Buenos Aires Jorge Newbery

Mon 10/6

6:20 am-1:41 pm

2 stops33h 21m

$821

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 11/18

4:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

Fri 12/12

7:35 am-12:30 pm

2 stops31h 55m

$831

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 10/27

9:20 pm-3:10 pm

2 stops39h 50m

Buenos Aires Ministro Pistarini

Mon 11/17

4:45 pm-7:30 pm

2 stops29h 45m

$876

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 11/15

3:35 pm-3:10 pm

2 stops20h 35m

Buenos Aires Ministro Pistarini

Sat 11/22

4:45 pm-11:18 am

2 stops21h 33m

$905

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 10/8

7:53 am-12:55 am

1 stop15h 02m

Buenos Aires Ministro Pistarini

Tue 11/18

3:57 am-12:05 am

1 stop23h 08m

$918

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 10/28

3:07 pm-7:54 am

1 stop14h 47m

Buenos Aires Ministro Pistarini

Sun 11/9

3:57 am-12:05 am

1 stop23h 08m

$938

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sun 10/26

11:20 pm-5:40 am

1 stop28h 20m

Buenos Aires Jorge Newbery

Sun 11/2

7:00 am-8:20 pm

1 stop16h 20m

$1,007

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 11/5

1:08 pm-11:40 am

2 stops19h 32m

Buenos Aires Jorge Newbery

Wed 11/12

5:15 pm-10:03 am

2 stops19h 48m

$1,015

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 O'Hare Intl Airport 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 Chicago O'Hare Intl Airport is in July. Flight prices, which tend to average around $1,065, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of July, then book flights to Buenos Aires from Chicago O'Hare Intl Airport during March instead. Flights to Buenos Aires in March, while not as cheap as those in July, still average around $1,107.

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 O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,172 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 O'Hare Intl Airport for as low as $781 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Buenos Aires flights?

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

When to book flights from Chicago O'Hare Intl Airport to Buenos Aires

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

Cheap Chicago O'Hare Intl Airport to Buenos Aires (ORD to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Buenos Aires

Best Price Found

$319

Fastest flight time

13h 10m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from Chicago O'Hare Intl Airport in the past 72 hours is $319. The best round-trip flight deal from Chicago O'Hare Intl Airport to Buenos Aires found on momondo in the last 72 hours is $802.
The fastest flight from Chicago O'Hare Intl Airport to Buenos Aires takes 13h 10m
There are no direct flights from Chicago O'Hare Intl Airport to Buenos Aires. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Buenos Aires Jorge Newbery Airport and Chicago O'Hare Intl Airport - Buenos Aires Ministro Pistarini 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 O'Hare Intl to Buenos Aires by plane?

    Buenos Aires is 5608.8 mi away from Chicago O'Hare Intl. Typically, this will take 13h 10m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Buenos Aires?

    Prices for flights from Chicago O'Hare Intl Airport to Buenos Aires are updated daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Buenos Aires?

  • How old do you have to be to fly from Chicago O'Hare Intl 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 Chicago O'Hare Intl Airport to Buenos Aires.

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

    The required travel and health documents for your Buenos Aires trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Buenos Aires. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Chicago O'Hare Intl Airport to Buenos Aires?

Best airlines flying from Chicago O'Hare Intl Airport to Buenos Aires

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $699Free CancellationRating
7.5
1,510 reviews
Search Copa Airlines flights
ArajetPriceFrom $736Free CancellationRating
6.9
33 reviews
Search Arajet flights
AviancaPriceFrom $753Free CancellationRating
6.7
2,407 reviews
Search Avianca flights
American AirlinesPriceFrom $1,015Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $1,023Free CancellationRating
8.0
7,986 reviews
Search Delta flights
United AirlinesPriceFrom $1,093Free CancellationRating
7.4
8,919 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Buenos Aires?

It is quick and easy to find Chicago to Buenos Aires flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Buenos Aires that suits you.

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

Yes. momondo allows you to filter the results for Chicago to Buenos Aires flights to just show those with flexible booking policies.

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

Once all potential Chicago to Buenos Aires flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Chicago to Buenos Aires flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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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