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Cheap flights from Illinois to Buenos Aires from $309

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Buenos Aires departing on 3/15. 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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0 bags

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Find the cheapest flights from Illinois to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:00 pm - 8:00 am
ORD
-
EZE
14h 00m
1 stop
United Airlines Logo
9:00 pm - 11:15 pm
EZE
-
ORD
28h 15m
1 stop
$908United Airlines
Tue, May 5 - Wed, May 13
Copa Airlines Logo
3:22 pm - 1:02 am
ORD
-
EZE
31h 40m
1 stop
Copa Airlines Logo
2:52 pm - 1:46 pm
EZE
-
ORD
24h 54m
1 stop
$909Copa Airlines
Sat, Mar 21 - Mon, Mar 30
Multiple Airlines Logo
10:48 am - 4:30 am
ORD
-
EZE
14h 42m
1 stop
Multiple Airlines Logo
5:35 am - 9:13 pm
EZE
-
ORD
18h 38m
2 stops
$910Multiple Airlines
Fri, Feb 27 - Sat, Mar 7
Multiple Airlines Logo
6:34 pm - 8:30 am
ORD
-
AEP
35h 56m
2 stops
Multiple Airlines Logo
5:10 pm - 11:47 pm
AEP
-
ORD
32h 37m
2 stops
$910Multiple Airlines
Sat, May 23 - Sun, Jun 28
LATAM Airlines Logo
10:45 am - 9:35 am
MDW
-
EZE
20h 50m
2 stops
LATAM Airlines Logo
12:00 pm - 5:22 pm
EZE
-
MDW
31h 22m
2 stops
$914LATAM Airlines
Thu, Mar 19 - Sun, Mar 22
LATAM Airlines Logo
12:45 pm - 9:00 am
MDW
-
EZE
17h 15m
1 stop
LATAM Airlines Logo
7:04 pm - 12:02 pm
EZE
-
MDW
18h 58m
2 stops
$917LATAM Airlines
Mon, Mar 2 - Mon, Mar 9
Avianca Logo
11:20 pm - 12:25 am
ORD
-
EZE
23h 05m
1 stop
Avianca Logo
7:10 am - 9:20 pm
EZE
-
ORD
16h 10m
1 stop
$919Avianca
Thu, Apr 2 - Sat, Apr 11
Delta Logo
9:34 am - 10:15 am
MDW
-
EZE
21h 41m
2 stops
Delta Logo
8:55 pm - 12:46 pm
EZE
-
MDW
18h 51m
2 stops
$921Delta
Mon, Feb 16 - Mon, Feb 23
Delta Logo
6:40 pm - 9:00 am
MDW
-
EZE
35h 20m
1 stop
Delta Logo
8:55 pm - 9:56 am
EZE
-
MDW
15h 01m
1 stop
$925Delta
Sun, Mar 1 - Tue, Mar 10
Avianca Logo
10:10 am - 9:20 am
STL
-
EZE
20h 10m
1 stop
Avianca Logo
10:05 pm - 9:23 am
EZE
-
STL
14h 18m
1 stop
$1,223Avianca
Thu, Feb 19 - Thu, Feb 26

United Airlines flights from Illinois to Buenos Aires

Our best United Airlines deals on Illinois to Buenos Aires flight tickets
United Airlines
May 5
ORD4:00 pmChicago O'Hare Intl
14h 00m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
May 13
EZE9:00 pmBuenos Aires Ministro Pistarini
28h 15m
1 stop
ORD11:15 pmChicago O'Hare Intl
$908
United Airlines
Feb 26
ORD12:45 pmChicago O'Hare Intl
15h 35m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 9
EZE9:05 pmBuenos Aires Ministro Pistarini
15h 02m
1 stop
ORD10:07 amChicago O'Hare Intl
$917
United Airlines
Mar 8
STL7:41 amLambert-St Louis
46h 39m
2 stops
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE9:05 pmBuenos Aires Ministro Pistarini
14h 16m
1 stop
STL9:21 amLambert-St Louis
$1,089

Copa Airlines flights from Illinois to Buenos Aires

Our best Copa Airlines deals on Illinois to Buenos Aires flight tickets
Copa Airlines
Mar 21
ORD3:22 pmChicago O'Hare Intl
31h 40m
1 stop
EZE1:02 amBuenos Aires Ministro Pistarini
Mar 30
EZE2:52 pmBuenos Aires Ministro Pistarini
24h 54m
1 stop
ORD1:46 pmChicago O'Hare Intl
$909
Copa Airlines
Jun 6
ORD8:02 amChicago O'Hare Intl
14h 50m
1 stop
EZE12:52 amBuenos Aires Ministro Pistarini
Jun 19
EZE3:48 amBuenos Aires Ministro Pistarini
23h 27m
1 stop
ORD1:15 amChicago O'Hare Intl
$925
Copa Airlines
Feb 18
ORD7:34 amChicago O'Hare Intl
36h 00m
1 stop
EZE10:34 pmBuenos Aires Ministro Pistarini
Feb 24
EZE2:20 pmBuenos Aires Ministro Pistarini
25h 11m
1 stop
ORD12:31 pmChicago O'Hare Intl
$940

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 February 4, 2026.
Use the filters below to find and compare flights from Illinois 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 5/5

4:00 pm-8:00 am

1 stop14h 00m

Buenos Aires Ministro Pistarini

Wed 5/13

9:00 pm-11:15 pm

1 stop28h 15m

$908

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 3/21

3:22 pm-1:02 am

1 stop31h 40m

Buenos Aires Ministro Pistarini

Mon 3/30

2:52 pm-1:46 pm

1 stop24h 54m

$909

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 2/27

10:48 am-4:30 am

1 stop14h 42m

Buenos Aires Ministro Pistarini

Sat 3/7

5:35 am-9:13 pm

2 stops18h 38m

$910

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sat 5/23

6:34 pm-8:30 am

2 stops35h 56m

Buenos Aires Jorge Newbery

Sun 6/28

5:10 pm-11:47 pm

2 stops32h 37m

$910

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Thu 3/19

10:45 am-9:35 am

2 stops20h 50m

Buenos Aires Ministro Pistarini

Sun 3/22

12:00 pm-5:22 pm

2 stops31h 22m

$914

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Mon 3/2

12:45 pm-9:00 am

1 stop17h 15m

Buenos Aires Ministro Pistarini

Mon 3/9

7:04 pm-12:02 pm

2 stops18h 58m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 4/2

11:20 pm-12:25 am

1 stop23h 05m

Buenos Aires Ministro Pistarini

Sat 4/11

7:10 am-9:20 pm

1 stop16h 10m

$919

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Mon 2/16

9:34 am-10:15 am

2 stops21h 41m

Buenos Aires Ministro Pistarini

Mon 2/23

8:55 pm-12:46 pm

2 stops18h 51m

$921

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Sun 3/1

6:40 pm-9:00 am

1 stop35h 20m

Buenos Aires Ministro Pistarini

Tue 3/10

8:55 pm-9:56 am

1 stop15h 01m

$925

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 2/19

10:10 am-9:20 am

1 stop20h 10m

Buenos Aires Ministro Pistarini

Thu 2/26

10:05 pm-9:23 am

1 stop14h 18m

$1,223

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 Illinois 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 Illinois is in November. Flight prices, which tend to average around $963, 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 Illinois during October instead. Flights to Buenos Aires in October, while not as cheap as those in November, still average around $972.

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

You are more likely to see cheaper flights to Buenos Aires from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,118 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Illinois for as low as $760 on momondo.

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

You could potentially save up to 35% on your flight if you consider stops on a Illinois to Buenos Aires flight.

Cheap Illinois to Buenos Aires flight deals and tips

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

Fastest flight time

12h 40m

Direct flights

None
The fastest flight from Illinois to Buenos Aires takes 12h 40m
There are no direct flights from Illinois to Buenos Aires. There are no popular flight routes from Illinois to Buenos Aires.
Search flight deals

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

    Prices for flights from Illinois to Buenos Aires are refreshed on a daily basis.

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

  • How old do you have to be to fly from Illinois 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 Illinois 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.

Best airlines flying from Illinois to Buenos Aires

Compare and see reviews for airlines that fly from Illinois to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
ArajetPriceFrom $360Free CancellationRating
6.6
43 reviews
Search Arajet flights
Copa AirlinesPriceFrom $569Free CancellationRating
7.5
1,556 reviews
Search Copa Airlines flights
AviancaPriceFrom $726Free CancellationRating
6.5
2,498 reviews
Search Avianca flights
DeltaPriceFrom $951Free CancellationRating
7.9
8,141 reviews
Search Delta flights
United AirlinesPriceFrom $951Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,015Free CancellationRating
7.2
11,217 reviews
Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Buenos Aires. momondo saves you time and could save you money on your trip.

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

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

How can momondo help me find flights from Illinois 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 Illinois to Buenos Aires.

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

Of course. momondo tracks the price of Illinois 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