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Cheap flights from Chicago O'Hare Intl Airport to Buenos Aires from $190

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 12/1. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:27 am - 10:20 amORD-EZE
21h 53m2 stops
Multiple Airlines Logo
7:30 am - 9:20 pmEZE-ORD
15h 50m1 stop
$766Multiple Airlines
Find Deal
Mon, Oct 27 - Wed, Oct 29
Multiple Airlines Logo
8:59 pm - 10:31 pmORD-EZE
46h 32m2 stops
Multiple Airlines Logo
7:35 am - 8:20 pmEZE-ORD
15h 45m1 stop
$768Multiple Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Arajet Logo
5:45 am - 12:05 amORD-EZE
15h 20m1 stop
Arajet Logo
11:20 am - 10:40 pmEZE-ORD
14h 20m1 stop
$785Arajet
Find Deal
Wed, Feb 11 - Tue, Feb 24
Avianca Logo
10:20 pm - 12:35 amORD-EZE
23h 15m1 stop
Avianca Logo
7:35 am - 8:20 pmEZE-ORD
15h 45m1 stop
$805Avianca
Find Deal
Tue, Nov 11 - Tue, Nov 18
Arajet Logo
5:45 am - 12:05 amORD-EZE
15h 20m1 stop
Arajet Logo
5:00 am - 8:57 amEZE-ORD
30h 57m1 stop
$813Arajet
Find Deal
Wed, Feb 11 - Fri, Feb 27
Avianca Logo
11:20 pm - 12:35 amORD-EZE
23h 15m1 stop
Avianca Logo
7:30 am - 9:20 pmEZE-ORD
15h 50m1 stop
$846Avianca
Find Deal
Sun, Oct 26 - Fri, Oct 31
Air Canada Logo
3:35 pm - 3:10 pmORD-EZE
21h 35m2 stops
Air Canada Logo
4:35 pm - 10:57 amEZE-ORD
20h 22m2 stops
$856Air Canada
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Sat, Mar 21 - Sat, Apr 4
Air Canada Logo
7:15 am - 3:10 pmORD-EZE
28h 55m2 stops
Air Canada Logo
4:45 pm - 8:00 pmEZE-ORD
30h 15m2 stops
$861Air Canada
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Tue, Feb 3 - Mon, Feb 23
LATAM Airlines Logo
5:50 am - 7:55 amORD-AEP
23h 05m2 stops
LATAM Airlines Logo
5:15 pm - 10:06 amAEP-ORD
19h 51m2 stops
$902LATAM Airlines
Find Deal
Mon, Feb 9 - Tue, Feb 17
LATAM Airlines Logo
5:55 pm - 4:00 pmORD-AEP
19h 05m2 stops
LATAM Airlines Logo
8:25 pm - 11:54 pmAEP-ORD
30h 29m2 stops
$932LATAM Airlines
Find Deal
Thu, Jan 8 - Tue, Jan 20

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

Our best Avianca deals on Chicago O'Hare Intl Airport to Buenos Aires flight tickets
Avianca
Nov 11
ORD10:20 pmChicago O'Hare Intl
23h 15m
1 stop
EZE12:35 amBuenos Aires Ministro Pistarini
Nov 18
EZE7:35 amBuenos Aires Ministro Pistarini
15h 45m
1 stop
ORD8:20 pmChicago O'Hare Intl
$805
Find similar
Avianca
Oct 20
ORD2:35 pmChicago O'Hare Intl
13h 10m
1 stop
EZE5:45 amBuenos Aires Ministro Pistarini
Nov 2
EZE7:35 amBuenos Aires Ministro Pistarini
15h 45m
1 stop
ORD8:20 pmChicago O'Hare Intl
$839
Find similar
Avianca
Oct 26
ORD11:20 pmChicago O'Hare Intl
23h 15m
1 stop
EZE12:35 amBuenos Aires Ministro Pistarini
Oct 31
EZE7:30 amBuenos Aires Ministro Pistarini
15h 50m
1 stop
ORD9:20 pmChicago O'Hare Intl
$846
Find similar

United Airlines flights from Chicago O'Hare Intl Airport to Buenos Aires

Our best United Airlines deals on Chicago O'Hare Intl Airport to Buenos Aires flight tickets
United Airlines
Oct 21
ORD7:55 pmChicago O'Hare Intl
34h 05m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Nov 3
EZE10:05 pmBuenos Aires Ministro Pistarini
24h 51m
1 stop
ORD7:56 pmChicago O'Hare Intl
$911
Find similar
United Airlines
Oct 20
ORD9:05 pmChicago O'Hare Intl
32h 55m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Mar 23
EZE9:05 pmBuenos Aires Ministro Pistarini
16h 04m
1 stop
ORD11:09 amChicago O'Hare Intl
$961
Find similar
United Airlines
Oct 15
ORD2:20 pmChicago O'Hare Intl
15h 40m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Nov 3
EZE10:05 pmBuenos Aires Ministro Pistarini
17h 11m
1 stop
ORD12:16 pmChicago O'Hare Intl
$1,004
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 October 14, 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

Mon 10/27

10:27 am-10:20 am

2 stops21h 53m

Buenos Aires Ministro Pistarini

Wed 10/29

7:30 am-9:20 pm

1 stop15h 50m

$766

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 11/11

8:59 pm-10:31 pm

2 stops46h 32m

Buenos Aires Ministro Pistarini

Tue 11/18

7:35 am-8:20 pm

1 stop15h 45m

$768

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 2/11

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Tue 2/24

11:20 am-10:40 pm

1 stop14h 20m

$785

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 11/11

10:20 pm-12:35 am

1 stop23h 15m

Buenos Aires Ministro Pistarini

Tue 11/18

7:35 am-8:20 pm

1 stop15h 45m

$805

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 2/11

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Fri 2/27

5:00 am-8:57 am

1 stop30h 57m

$813

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 10/26

11:20 pm-12:35 am

1 stop23h 15m

Buenos Aires Ministro Pistarini

Fri 10/31

7:30 am-9:20 pm

1 stop15h 50m

$846

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 3/21

3:35 pm-3:10 pm

2 stops21h 35m

Buenos Aires Ministro Pistarini

Sat 4/4

4:35 pm-10:57 am

2 stops20h 22m

$856

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 2/3

7:15 am-3:10 pm

2 stops28h 55m

Buenos Aires Ministro Pistarini

Mon 2/23

4:45 pm-8:00 pm

2 stops30h 15m

$861

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Mon 2/9

5:50 am-7:55 am

2 stops23h 05m

Buenos Aires Jorge Newbery

Tue 2/17

5:15 pm-10:06 am

2 stops19h 51m

$902

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 1/8

5:55 pm-4:00 pm

2 stops19h 05m

Buenos Aires Jorge Newbery

Tue 1/20

8:25 pm-11:54 pm

2 stops30h 29m

$932

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buenos Aires from

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 $1,069.

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 $1,144 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 $805 on momondo.

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

You could potentially save up to 21% 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

Direct flights

None
There are no direct flights from Chicago O'Hare Intl Airport to Buenos Aires. There are no popular flight routes from Chicago O'Hare Intl Airport to Buenos Aires.
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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 15h 20m 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
7.6
1,548 reviews
Search Copa Airlines flights
ArajetPriceFrom $736Free CancellationRating
7.1
36 reviews
Search Arajet flights
AviancaPriceFrom $750Free CancellationRating
6.6
2,451 reviews
Search Avianca flights
American AirlinesPriceFrom $1,015Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
DeltaPriceFrom $1,023Free CancellationRating
7.9
7,975 reviews
Search Delta flights
United AirlinesPriceFrom $1,060Free CancellationRating
7.4
8,976 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