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Cheap flights from Chicago O'Hare Intl Airport to Buenos Aires from $290

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 12/9. 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.
Arajet Logo
11:27 am - 3:45 amORD-EZE
14h 18m1 stop
Arajet Logo
2:45 am - 11:40 pmEZE-ORD
22h 55m1 stop
$763Arajet
Find Deal
Sat, May 23 - Mon, Jun 1
Arajet Logo
4:30 am - 12:05 amORD-EZE
17h 35m1 stop
Arajet Logo
9:15 pm - 9:57 amEZE-ORD
14h 42m1 stop
$764Arajet
Find Deal
Mon, Mar 30 - Fri, Apr 10
Arajet Logo
4:30 am - 12:05 amORD-EZE
17h 35m1 stop
Arajet Logo
8:40 am - 10:10 pmEZE-ORD
15h 30m1 stop
$768Arajet
Find Deal
Mon, Mar 30 - Sun, Apr 12
Multiple Airlines Logo
2:35 pm - 12:20 pmORD-AEP
19h 45m2 stops
Multiple Airlines Logo
6:20 am - 11:40 pmAEP-ORD
19h 20m2 stops
$771Multiple Airlines
Find Deal
Mon, May 11 - Tue, May 19
Multiple Airlines Logo
11:27 am - 3:45 pmORD-EZE
26h 18m2 stops
Multiple Airlines Logo
3:45 pm - 10:10 pmEZE-ORD
32h 25m2 stops
$774Multiple Airlines
Find Deal
Sat, May 23 - Sat, Jun 6
Multiple Airlines Logo
4:30 am - 12:05 amORD-EZE
17h 35m1 stop
Multiple Airlines Logo
7:35 pm - 1:15 pmEZE-ORD
19h 40m2 stops
$776Multiple Airlines
Find Deal
Mon, Mar 30 - Sat, Apr 11
Multiple Airlines Logo
5:15 am - 9:20 pmORD-AEP
37h 05m3 stops
Multiple Airlines Logo
3:20 pm - 6:16 pmAEP-ORD
29h 56m3 stops
$776Multiple Airlines
Find Deal
Wed, Jan 21 - Wed, Feb 4
Multiple Airlines Logo
9:23 am - 10:15 amORD-EZE
21h 52m2 stops
Multiple Airlines Logo
2:45 am - 8:18 amEZE-ORD
32h 33m2 stops
$777Multiple Airlines
Find Deal
Mon, Jan 19 - Sat, Jan 31
Multiple Airlines Logo
5:45 am - 3:05 amORD-EZE
18h 20m2 stops
Multiple Airlines Logo
4:45 pm - 6:16 pmEZE-ORD
28h 31m3 stops
$778Multiple Airlines
Find Deal
Wed, Jan 14 - Wed, Jan 28
Arajet Logo
5:45 am - 12:05 amORD-EZE
15h 20m1 stop
Arajet Logo
11:15 am - 10:40 pmEZE-ORD
14h 25m1 stop
$779Arajet
Find Deal
Mon, Feb 2 - Tue, Feb 17

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

Our best LATAM Airlines deals on Chicago O'Hare Intl Airport to Buenos Aires flight tickets
LATAM Airlines
Mar 8
ORD2:25 pmChicago O'Hare Intl
16h 35m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Mar 13
EZE2:45 pmBuenos Aires Ministro Pistarini
21h 34m
2 stops
ORD10:19 amChicago O'Hare Intl
$791
Find similar
LATAM Airlines
Dec 5
ORD1:20 pmChicago O'Hare Intl
17h 15m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Dec 10
EZE2:45 pmBuenos Aires Ministro Pistarini
20h 54m
2 stops
ORD8:39 amChicago O'Hare Intl
$795
Find similar
LATAM Airlines
Dec 9
ORD1:20 pmChicago O'Hare Intl
21h 25m
2 stops
EZE1:45 pmBuenos Aires Ministro Pistarini
Dec 18
EZE11:55 pmBuenos Aires Ministro Pistarini
21h 48m
1 stop
ORD6:43 pmChicago O'Hare Intl
$893
Find similar

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
May 23
ORD11:27 amChicago O'Hare Intl
14h 18m
1 stop
EZE3:45 amBuenos Aires Ministro Pistarini
Jun 1
EZE2:45 amBuenos Aires Ministro Pistarini
22h 55m
1 stop
ORD11:40 pmChicago O'Hare Intl
$763
Find similar
Arajet
Mar 30
ORD4:30 amChicago O'Hare Intl
17h 35m
1 stop
EZE12:05 amBuenos Aires Ministro Pistarini
Apr 10
EZE9:15 pmBuenos Aires Ministro Pistarini
14h 42m
1 stop
ORD9:57 amChicago O'Hare Intl
$764
Find similar
Arajet
Mar 30
ORD4:30 amChicago O'Hare Intl
17h 35m
1 stop
EZE12:05 amBuenos Aires Ministro Pistarini
Apr 12
EZE8:40 amBuenos Aires Ministro Pistarini
15h 30m
1 stop
ORD10:10 pmChicago O'Hare Intl
$768
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 December 1, 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

Sat 5/23

11:27 am-3:45 am

1 stop14h 18m

Buenos Aires Ministro Pistarini

Mon 6/1

2:45 am-11:40 pm

1 stop22h 55m

$763

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 3/30

4:30 am-12:05 am

1 stop17h 35m

Buenos Aires Ministro Pistarini

Fri 4/10

9:15 pm-9:57 am

1 stop14h 42m

$764

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 3/30

4:30 am-12:05 am

1 stop17h 35m

Buenos Aires Ministro Pistarini

Sun 4/12

8:40 am-10:10 pm

1 stop15h 30m

$768

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Mon 5/11

2:35 pm-12:20 pm

2 stops19h 45m

Buenos Aires Jorge Newbery

Tue 5/19

6:20 am-11:40 pm

2 stops19h 20m

$771

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 5/23

11:27 am-3:45 pm

2 stops26h 18m

Buenos Aires Ministro Pistarini

Sat 6/6

3:45 pm-10:10 pm

2 stops32h 25m

$774

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 3/30

4:30 am-12:05 am

1 stop17h 35m

Buenos Aires Ministro Pistarini

Sat 4/11

7:35 pm-1:15 pm

2 stops19h 40m

$776

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 1/21

5:15 am-9:20 pm

3 stops37h 05m

Buenos Aires Jorge Newbery

Wed 2/4

3:20 pm-6:16 pm

3 stops29h 56m

$776

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 1/19

9:23 am-10:15 am

2 stops21h 52m

Buenos Aires Ministro Pistarini

Sat 1/31

2:45 am-8:18 am

2 stops32h 33m

$777

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 1/14

5:45 am-3:05 am

2 stops18h 20m

Buenos Aires Ministro Pistarini

Wed 1/28

4:45 pm-6:16 pm

3 stops28h 31m

$778

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 2/2

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Tue 2/17

11:15 am-10:40 pm

1 stop14h 25m

$779

Flights are sorted by cheapest round-trip flights 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 November. 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 November, then book flights to Buenos Aires from Chicago O'Hare Intl Airport during July instead. Flights to Buenos Aires in July, while not as cheap as those in November, still average around $1,065.

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 $1,133 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 24% 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

Fastest flight time

14h 18m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Buenos Aires takes 14h 18m
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.
Search flight deals

  • 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
ArajetPriceFrom $360Free CancellationRating
6.9
37 reviews
Search Arajet flights
Copa AirlinesPriceFrom $699Free CancellationRating
7.6
1,560 reviews
Search Copa Airlines flights
AviancaPriceFrom $750Free CancellationRating
6.6
2,476 reviews
Search Avianca flights
DeltaPriceFrom $951Free CancellationRating
7.9
8,010 reviews
Search Delta flights
United AirlinesPriceFrom $951Free CancellationRating
7.4
9,065 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,015Free CancellationRating
7.2
11,041 reviews
Search American 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