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Southeast Europe

$208+ Cheap flights from Illinois to Southeast Europe

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ATH
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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Cheap flight deals from Illinois to Southeast Europe

Keep the following information in mind while searching for Illinois to Southeast Europe flight deals. Data was last updated January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$429
(AirNGo)

One-way from

$208
(Trip.com)

Popular in

June

Cheapest in

November

Average price

$680
Provider with most accurate pricing for Chicago (CHI)-Athens Eleftherios V. flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Athens Eleftherios V. flights.
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From Illinois to Southeast Europe
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One-way flight from Illinois to Southeast Europe
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Highest demand for flights based on searches. 30% potential increase in price ($379 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Illinois to Southeast Europe

Cheapest flights from Illinois to Southeast Europe
Explore the most affordable flight options available from Illinois to Southeast Europe. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

This AirNGo deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/14:05 pm
STL
-
ATH
2 stops16h 30m
Air Canada
Tue 3/171:10 pm
ATH
-
STL
1 stop33h 19m
Air Canada
Deal found 1/11$429
This oojo deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:18 pm
STL
-
ATH
2 stops17h 12m
British Airways
Mon 3/98:10 pm
ATH
-
STL
2 stops28h 48m
British Airways
Deal found 1/10$441
This Kiwi.com deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:55 pm
STL
-
ATH
2 stops21h 30m
Lufthansa
Wed 3/116:15 am
ATH
-
STL
1 stop15h 40m
Lufthansa
Deal found 1/10$444
This Booking.com deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:38 pm
STL
-
ATH
2 stops16h 32m
British Airways
Tue 3/177:35 am
ATH
-
STL
2 stops23h 13m
British Airways
Deal found 1/11$452
This Flightnetwork deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/13:50 pm
STL
-
ATH
1 stop13h 35m
Multiple Airlines
Tue 3/171:10 pm
ATH
-
STL
1 stop33h 19m
Multiple Airlines
Deal found 1/11$453
This British Airways deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:36 pm
STL
-
ATH
2 stops37h 19m
British Airways
Wed 3/117:50 am
ATH
-
STL
2 stops22h 58m
British Airways
Deal found 1/10$458
This Kiwi.com deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/13:50 pm
STL
-
ATH
1 stop12h 30m
Lufthansa
Sun 3/86:15 am
ATH
-
STL
1 stop15h 40m
Lufthansa
Deal found 1/10$459
This Kiwi.com deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/13:50 pm
STL
-
ATH
1 stop12h 30m
Multiple Airlines
Sun 3/88:00 am
ATH
-
STL
2 stops22h 51m
Multiple Airlines
Deal found 1/10$465
This oojo deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/812:01 pm
STL
-
ATH
2 stops19h 54m
British Airways
Sun 2/158:00 am
ATH
-
STL
2 stops23h 48m
British Airways
Deal found 1/10$466
This Air Canada deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:41 am
STL
-
ATH
2 stops18h 39m
Air Canada
Thu 3/1212:15 pm
ATH
-
STL
1 stop34h 14m
Air Canada
Deal found 1/10$471
This KLM deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/210:13 am
STL
-
ATH
2 stops18h 47m
KLM
Tue 3/1012:20 pm
ATH
-
STL
1 stop15h 46m
KLM
Deal found 1/10$472
This Air Canada deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:05 pm
STL
-
ATH
2 stops16h 35m
Air Canada
Mon 3/912:15 pm
ATH
-
STL
2 stops33h 34m
Air Canada
Deal found 1/10$473

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Southeast Europe 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, Cheapflights users made 2,558,603 searches. Data last updated January 12, 2026.
Use the filters below to find and compare flights from Illinois to Southeast Europe that are best for you.

Fly from

Illinois

Fly to

Southeast Europe

Route

Depart

Return

Price

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Wed 2/11

11:05 am-3:05 pm

2 stops20h 00m

Athens Eleftherios V.

Wed 2/18

8:20 pm-11:48 pm

2 stops35h 28m

$441

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 3/3

6:31 pm-7:30 pm

2 stops16h 59m

Athens Eleftherios V.

Mon 3/9

8:10 pm-11:48 pm

2 stops34h 38m

$441

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Wed 2/25

2:19 pm-1:05 am

2 stops26h 46m

Athens Eleftherios V.

Wed 3/4

8:20 pm-11:48 pm

2 stops35h 28m

$441

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Sat 2/28

6:36 pm-3:55 pm

2 stops37h 19m

Athens Eleftherios V.

Wed 3/11

7:50 am-11:48 pm

2 stops22h 58m

$458

ChicagoSarajevo

ORD - SJJ

ORDSJJ

Chicago O'Hare Intl

Mon 3/16

7:50 pm-1:55 pm

1 stop12h 05m

Sarajevo Butmir

Wed 4/15

9:35 am-12:35 pm

1 stop34h 00m

$475

ChicagoSarajevo

ORD - SJJ

ORDSJJ

Chicago O'Hare Intl

Wed 4/15

8:40 am-8:50 am

2 stops17h 10m

Sarajevo Butmir

Wed 4/29

6:25 am-7:55 pm

1 stop20h 30m

$481

ChicagoZagreb

ORD - ZAG

ORDZAG

Chicago O'Hare Intl

Tue 5/5

9:40 pm-9:35 pm

1 stop16h 55m

Zagreb Franjo Tuđman

Tue 5/12

5:35 am-7:55 pm

1 stop21h 20m

$485

ChicagoSarajevo

ORD - SJJ

ORDSJJ

Chicago O'Hare Intl

Fri 5/1

9:50 pm-12:25 pm

1 stop31h 35m

Sarajevo Butmir

Thu 5/7

5:05 pm-7:50 pm

1 stop33h 45m

$486

ChicagoSarajevo

ORD - SJJ

ORDSJJ

Chicago O'Hare Intl

Sun 4/12

5:10 pm-4:25 pm

1 stop16h 15m

Sarajevo Butmir

Sun 4/19

1:05 pm-7:50 pm

1 stop13h 45m

$486

ChicagoZagreb

ORD - ZAG

ORDZAG

Chicago O'Hare Intl

Tue 5/5

9:40 pm-9:35 pm

1 stop16h 55m

Zagreb Franjo Tuđman

Wed 5/13

5:55 am-12:55 pm

1 stop14h 00m

$502

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Southeast Europe

Have a flexible travel schedule? Discover the best time to fly to Southeast Europe from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Southeast Europe

What is the cheapest month to book a flight from Illinois to Southeast Europe?

Currently, April is the cheapest month in which you can book a flight from Illinois to Southeast Europe (average of $331). Flying from Illinois to Southeast Europe in June is currently the most expensive (average of $650). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to YMH?

Find hourly flight availability from Illinois to Southeast Europe. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 12, 2026.

A simple way to save on the total cost of your ticket is to fly from Illinois to Southeast Europe at noon. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Illinois to Southeast Europe?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Southeast Europe. Price data was last updated on January 10, 2026.

Travelers seeking maximum savings on their Illinois to Southeast Europe flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Southeast Europe. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Southeast Europe?

    British Airways, SWISS, and Lufthansa can get you from Illinois to Southeast Europe in just under 12h 05m. Your travel time can differ by up to 7h 55m. The distance from Illinois to Southeast Europe is about 4954 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Illinois to Southeast Europe one-way?

    One-way options have recently been found by users for as low as $208 on Air Serbia. Other airlines that offer cheap prices include JetBlue from $261 and Turkish Airlines from $284 one-way.

  • Can I find deals for flights from Illinois to Southeast Europe that include hotel bookings?

    Yes. In addition to deals on Illinois to Southeast Europe flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Southeast Europe?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Southeast Europe.

  • Can I find deals for business class flights from Illinois to Southeast Europe?

    Yes. Cheapflights offers flight deals from Illinois to Southeast Europe by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Southeast Europe?

    Currently, April is the cheapest month in which you can book a flight from Illinois to Southeast Europe (average of $331). Flying from Illinois to Southeast Europe in June is currently the most expensive (average of $650). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to Southeast Europe

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Southeast Europe

Discover the top 10 airlines that operate flights from Illinois to Southeast Europe. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$366Average$678FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$424Average$779FlexibilityNo cancel feeOn-time72%
DeltaCheapest$438Average$868FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$454Average$812FlexibilityNo cancel feeOn-time77%
KLMCheapest$466Average$814FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$480Average$1,099FlexibilityNo cancel feeOn-time67%
LOTCheapest$496Average$895FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$502Average$723FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$517Average$906FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$525Average$972FlexibilityNo cancel feeOn-time70%

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