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$258+ Cheap flights from Illinois to Serbia

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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BEG
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Illinois to Serbia

Cheapest flights from Illinois to Serbia
Explore the most affordable flight options available from Illinois to Serbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Justfly.com deal was found by Cheapflights users on 1/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1011:25 am
ORD
-
BEG
1 stop14h 00m
Turkish Airlines
Fri 4/244:15 pm
BEG
-
ORD
1 stop24h 25m
Turkish Airlines
Deal found 1/28$558
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:10 pm
ORD
-
BEG
1 stop16h 25m
Turkish Airlines
Sat 5/99:15 am
BEG
-
ORD
1 stop16h 00m
Turkish Airlines
Deal found 1/28$559
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:11 pm
STL
-
BEG
2 stops20h 54m
Lufthansa
Thu 3/121:30 pm
BEG
-
STL
2 stops16h 21m
Lufthansa
Deal found 1/27$563
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 2/411:50 am
ORD
-
BEG
1 stop19h 35m
Turkish Airlines
Sat 2/148:15 pm
BEG
-
ORD
1 stop20h 50m
Turkish Airlines
Deal found 1/27$566
This KLM deal was found by Cheapflights users on 1/28. 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.
Wed 2/2511:23 am
STL
-
BEG
2 stops17h 32m
KLM
Sun 3/16:05 am
BEG
-
STL
2 stops21h 38m
KLM
Deal found 1/28$566
This oojo deal was found by Cheapflights users on 1/28. 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.
Mon 3/1612:50 pm
ORD
-
BEG
1 stop19h 35m
Turkish Airlines
Sun 4/128:25 pm
BEG
-
ORD
1 stop28h 50m
Turkish Airlines
Deal found 1/28$571
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/259:55 am
STL
-
BEG
2 stops19h 55m
United Airlines
Sun 3/16:15 am
BEG
-
STL
1 stop14h 40m
United Airlines
Deal found 1/28$576
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Wed 2/1111:50 am
ORD
-
BEG
1 stop19h 35m
Turkish Airlines
Sun 2/153:15 pm
BEG
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 1/27$580
This CrystalTravel deal was found by Cheapflights users on 1/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/288:10 pm
ORD
-
BEG
1 stop16h 25m
Turkish Airlines
Sat 4/118:25 pm
BEG
-
ORD
1 stop20h 15m
Turkish Airlines
Deal found 1/28$582
This Justfly.com deal was found by Cheapflights users on 1/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:10 pm
ORD
-
BEG
1 stop16h 25m
Turkish Airlines
Fri 5/298:25 pm
BEG
-
ORD
1 stop20h 15m
Turkish Airlines
Deal found 1/27$586
This oojo deal was found by Cheapflights users on 1/28. 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.
Fri 2/138:20 pm
ORD
-
BEG
1 stop16h 05m
Turkish Airlines
Sat 2/219:00 am
BEG
-
ORD
1 stop32h 05m
Turkish Airlines
Deal found 1/28$590
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Wed 2/411:50 am
ORD
-
BEG
1 stop19h 35m
Turkish Airlines
Wed 2/113:15 pm
BEG
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 1/27$593

Find flight deals from Illinois to Serbia

Keep the following information in mind while searching for Illinois to Serbia flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$558
(Justfly.com)

One-way from

$258
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$701

Good round-trip deal

$768 or less

Good one-way deal

$412 or less
Provider with most accurate pricing for Chicago (CHI)-Belgrade Nikola Tesla flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Belgrade Nikola Tesla flights.
Search Deals
From Illinois to Serbia
Search Deals
One-way flight from Illinois to Serbia
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($264 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Serbia.
Search Deals
Price to beat on a one-way flight from Illinois to Serbia.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Serbia 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 29, 2026.
Use the filters below to find and compare flights from Illinois to Serbia that are best for you.

Fly from

Illinois

Fly to

Serbia

Route

Depart

Return

Price

St. LouisBelgrade

STL - BEG

STLBEG

Lambert-St Louis

Tue 3/3

1:11 pm-5:05 pm

2 stops20h 54m

Belgrade Nikola Tesla

Thu 3/12

1:30 pm-11:51 pm

2 stops16h 21m

$563

St. LouisBelgrade

STL - BEG

STLBEG

Lambert-St Louis

Wed 2/25

9:55 am-12:50 pm

2 stops19h 55m

Belgrade Nikola Tesla

Sun 3/1

6:15 am-1:55 pm

1 stop14h 40m

$576

St. LouisBelgrade

STL - BEG

STLBEG

Lambert-St Louis

Sun 3/1

3:50 pm-12:50 pm

1 stop14h 00m

Belgrade Nikola Tesla

Sat 3/14

1:50 pm-9:07 pm

2 stops37h 17m

$651

St. LouisBelgrade

STL - BEG

STLBEG

Lambert-St Louis

Wed 2/11

6:30 am-8:10 am

2 stops18h 40m

Belgrade Nikola Tesla

Sat 2/14

8:15 pm-4:02 pm

2 stops26h 47m

$756

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Sun 7/26

11:25 am-3:25 pm

1 stop21h 00m

Belgrade Nikola Tesla

Sun 8/16

12:55 am-10:05 pm

1 stop28h 10m

$758

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Sun 3/22

10:50 pm-5:05 pm

1 stop12h 15m

Belgrade Nikola Tesla

Thu 5/7

6:15 am-12:35 pm

1 stop13h 20m

$759

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Wed 3/18

1:57 pm-11:55 am

2 stops15h 58m

Belgrade Nikola Tesla

Tue 3/31

12:40 pm-2:30 pm

1 stop32h 50m

$764

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Tue 3/17

9:35 am-11:55 am

2 stops20h 20m

Belgrade Nikola Tesla

Tue 3/31

6:00 am-2:15 pm

1 stop15h 15m

$764

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Wed 3/18

5:59 pm-11:25 pm

2 stops23h 26m

Belgrade Nikola Tesla

Wed 4/1

6:00 am-2:30 pm

1 stop15h 30m

$764

ChicagoBelgrade

ORD - BEG

ORDBEG

Chicago O'Hare Intl

Sun 3/22

9:50 am-11:55 am

2 stops20h 05m

Belgrade Nikola Tesla

Wed 4/1

12:40 pm-2:15 pm

1 stop32h 35m

$764

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 52 results
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Best time to book a flight from Illinois to Serbia

Have a flexible travel schedule? Discover the best time to fly to Serbia 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 Serbia

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Serbia (average of $493). Flying from Illinois to Serbia in June is currently the most expensive (average of $987). 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 RS?

Find hourly flight availability from Illinois to Serbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from Illinois to Serbia by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Illinois to Serbia?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Serbia. Price data was last updated on December 13, 2025.

Travelers seeking maximum savings on their Illinois to Serbia 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 Serbia. 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 Serbia?

    Lufthansa, United Airlines, and KLM can get you from Illinois to Serbia in just under 15h 58m. Your travel time can differ by up to 4h 56m. Illinois and Serbia are separated by a distance of 4981 mi. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from Illinois to Serbia are JetBlue ($261), Air Serbia ($310), and Turkish Airlines ($384).

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

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

  • How can I find direct flights from Illinois to Serbia?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Serbia 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 Serbia?

    Currently, March is the cheapest month in which you can book a flight from Illinois to Serbia (average of $493). Flying from Illinois to Serbia in June is currently the most expensive (average of $987). 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 Serbia

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 Serbia

Discover the top 10 airlines that operate flights from Illinois to Serbia. 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$520Average$653FlexibilityNo cancel feeOn-time77%
SWISSCheapest$546Average$887FlexibilityNo cancel feeOn-time79%
KLMCheapest$547Average$920FlexibilityNo cancel feeOn-time75%
DeltaCheapest$548Average$816FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$567Average$862FlexibilityNo cancel feeOn-time69%
LOTCheapest$579Average$830FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$589Average$839FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$663Average$942FlexibilityNo cancel feeOn-time76%
JetBlueCheapest$717Average$1,043FlexibilityNo cancel feeOn-time62%
Air SerbiaCheapest$821Average$971FlexibilityNo cancel feeOn-timeN/A

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