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Cheap flights from Illinois to Buenos Aires from $275

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 11/24. 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 Illinois to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
10:47 am - 9:00 amMDW-EZE
19h 13m1 stop
Delta Logo
8:55 pm - 4:18 pmEZE-MDW
22h 23m1 stop
$761Delta
Find Deal
Thu, Nov 27 - Mon, Dec 1
Delta Logo
6:45 am - 6:05 amORD-EZE
20h 20m2 stops
Delta Logo
11:55 pm - 4:45 pmEZE-ORD
19h 50m1 stop
$761Delta
Find Deal
Thu, Nov 27 - Mon, Dec 1
LATAM Airlines Logo
1:14 pm - 9:40 amORD-AEP
17h 26m2 stops
LATAM Airlines Logo
3:40 pm - 8:42 amAEP-ORD
20h 02m2 stops
$761LATAM Airlines
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Fri, Nov 28 - Sat, Dec 6
Multiple Airlines Logo
6:48 am - 5:10 amORD-EZE
19h 22m3 stops
Multiple Airlines Logo
7:30 am - 12:09 amEZE-ORD
43h 39m3 stops
$764Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Delta Logo
12:47 pm - 9:00 amMDW-EZE
17h 13m1 stop
Delta Logo
10:25 pm - 3:44 pmEZE-MDW
20h 19m2 stops
$765Delta
Find Deal
Mon, Dec 1 - Fri, Dec 5
Multiple Airlines Logo
4:58 pm - 5:10 amORD-EZE
33h 12m3 stops
Multiple Airlines Logo
4:55 pm - 6:36 pmEZE-ORD
28h 41m3 stops
$768Multiple Airlines
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Mon, Dec 1 - Fri, Dec 5
United Airlines Logo
9:08 pm - 7:20 amORD-EZE
31h 12m1 stop
United Airlines Logo
10:05 pm - 10:56 amEZE-ORD
15h 51m1 stop
$769United Airlines
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Thu, Nov 20 - Thu, Nov 27
Arajet Logo
5:45 am - 12:05 amORD-EZE
15h 20m1 stop
Arajet Logo
11:20 am - 11:40 pmEZE-ORD
14h 20m1 stop
$773Arajet
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Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
9:08 pm - 7:20 amORD-EZE
31h 12m1 stop
United Airlines Logo
10:05 pm - 7:42 amEZE-ORD
36h 37m1 stop
$778United Airlines
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Thu, Nov 20 - Mon, Dec 1
LATAM Airlines Logo
1:25 pm - 2:40 pmORD-AEP
22h 15m2 stops
LATAM Airlines Logo
8:50 am - 10:14 amAEP-ORD
28h 24m2 stops
$786LATAM Airlines
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Tue, Nov 25 - Mon, Dec 1

United Airlines flights from Illinois to Buenos Aires

Our best United Airlines deals on Illinois to Buenos Aires flight tickets
United Airlines
Nov 16
ORD6:00 amChicago O'Hare Intl
22h 20m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 21
EZE10:05 pmBuenos Aires Ministro Pistarini
14h 57m
1 stop
ORD10:02 amChicago O'Hare Intl
$761
Find similar
United Airlines
Nov 20
ORD9:08 pmChicago O'Hare Intl
31h 12m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 27
EZE10:05 pmBuenos Aires Ministro Pistarini
15h 51m
1 stop
ORD10:56 amChicago O'Hare Intl
$769
Find similar
United Airlines
Nov 20
ORD9:08 pmChicago O'Hare Intl
31h 12m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 1
EZE10:05 pmBuenos Aires Ministro Pistarini
36h 37m
1 stop
ORD7:42 amChicago O'Hare Intl
$778
Find similar

Copa Airlines flights from Illinois to Buenos Aires

Our best Copa Airlines deals on Illinois to Buenos Aires flight tickets
Copa Airlines
Nov 14
ORD6:56 amChicago O'Hare Intl
14h 57m
1 stop
EZE12:53 amBuenos Aires Ministro Pistarini
Nov 17
EZE3:57 amBuenos Aires Ministro Pistarini
23h 08m
1 stop
ORD12:05 amChicago O'Hare Intl
$769
Find similar
Copa Airlines
Nov 15
ORD6:56 amChicago O'Hare Intl
18h 14m
1 stop
EZE4:10 amBuenos Aires Ministro Pistarini
Nov 24
EZE2:15 amBuenos Aires Ministro Pistarini
24h 50m
1 stop
ORD12:05 amChicago O'Hare Intl
$789
Find similar
Copa Airlines
Jan 1
ORD7:35 amChicago O'Hare Intl
15h 23m
1 stop
EZE1:58 amBuenos Aires Ministro Pistarini
Feb 16
EZE2:48 pmBuenos Aires Ministro Pistarini
24h 43m
1 stop
ORD12:31 pmChicago O'Hare Intl
$819
Find similar

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 November 5, 2025.
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

MDW - EZE

MDWEZE

Chicago Midway

Thu 11/27

10:47 am-9:00 am

1 stop19h 13m

Buenos Aires Ministro Pistarini

Mon 12/1

8:55 pm-4:18 pm

1 stop22h 23m

$761

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/27

6:45 am-6:05 am

2 stops20h 20m

Buenos Aires Ministro Pistarini

Mon 12/1

11:55 pm-4:45 pm

1 stop19h 50m

$761

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Fri 11/28

1:14 pm-9:40 am

2 stops17h 26m

Buenos Aires Jorge Newbery

Sat 12/6

3:40 pm-8:42 am

2 stops20h 02m

$761

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 12/2

6:48 am-5:10 am

3 stops19h 22m

Buenos Aires Ministro Pistarini

Tue 12/9

7:30 am-12:09 am

3 stops43h 39m

$764

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Mon 12/1

12:47 pm-9:00 am

1 stop17h 13m

Buenos Aires Ministro Pistarini

Fri 12/5

10:25 pm-3:44 pm

2 stops20h 19m

$765

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 12/1

4:58 pm-5:10 am

3 stops33h 12m

Buenos Aires Ministro Pistarini

Fri 12/5

4:55 pm-6:36 pm

3 stops28h 41m

$768

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/20

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Thu 11/27

10:05 pm-10:56 am

1 stop15h 51m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 2/23

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Tue 3/10

11:20 am-11:40 pm

1 stop14h 20m

$773

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/20

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Mon 12/1

10:05 pm-7:42 am

1 stop36h 37m

$778

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Tue 11/25

1:25 pm-2:40 pm

2 stops22h 15m

Buenos Aires Jorge Newbery

Mon 12/1

8:50 am-10:14 am

2 stops28h 24m

$786

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 October. Flight prices, which tend to average around $993, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Buenos Aires from Illinois during November instead. Flights to Buenos Aires in November, while not as cheap as those in October, still average around $1,006.

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 Illinois 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 Illinois 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 Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,146 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 $805 on momondo.

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

You could potentially save up to 32% 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

Direct flights

None
There are no direct flights from Illinois to Buenos Aires. There are no popular flight routes from Illinois to Buenos Aires.
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  • 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
7.1
36 reviews
Search Arajet flights
Copa AirlinesPriceFrom $699Free CancellationRating
7.6
1,561 reviews
Search Copa Airlines flights
AviancaPriceFrom $750Free CancellationRating
6.6
2,469 reviews
Search Avianca flights
DeltaPriceFrom $951Free CancellationRating
7.9
8,004 reviews
Search Delta flights
United AirlinesPriceFrom $975Free CancellationRating
7.4
9,004 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,015Free CancellationRating
7.2
11,042 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