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$301+ Cheap flights from Illinois to Istanbul (IST)

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IST
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheap flight deals from Illinois to Istanbul

Cheapest flights from Illinois to Istanbul
Explore the most affordable flight options available from Illinois to Istanbul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This FlightHub deal was found by Cheapflights users on 12/20. 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.
Sat 12/279:55 pmORD - IST
1 stop17h 45mLOT
Tue 3/103:00 pmIST - ORD
1 stop14h 00mLOT
Deal found 12/20$948
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Fri 12/269:55 pmORD - IST
2 stops28h 40mLOT
Wed 1/142:55 pmIST - ORD
1 stop14h 05mLOT
Deal found 12/21$962
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Thu 12/259:55 pmORD - IST
2 stops28h 25mLOT
Mon 1/126:30 pmIST - ORD
1 stop34h 30mLOT
Deal found 12/21$1,080
This oojo deal was found by Cheapflights users on 12/22. 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 12/269:55 pmORD - IST
2 stops28h 40mLOT
Sun 12/282:55 pmIST - ORD
2 stops38h 00mLOT
Deal found 12/22$1,167
This British Airways deal was found by Cheapflights users on 12/22. 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.
Sun 12/285:10 pmORD - IST
1 stop35h 40mBritish Airways
Thu 1/82:35 pmIST - ORD
1 stop37h 10mBritish Airways
Deal found 12/22$1,192
This Booking.com deal was found by Cheapflights users on 12/21. 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.
Thu 12/259:55 pmORD - IST
2 stops28h 25mMultiple Airlines
Sat 12/2710:10 pmIST - ORD
1 stop25h 55mMultiple Airlines
Deal found 12/21$1,205
This Ovago deal was found by Cheapflights users on 12/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 pmSTL - IST
2 stops43h 10mLufthansa
Tue 1/206:30 amIST - STL
2 stops26h 29mLufthansa
Deal found 12/22$1,290
This Ovago deal was found by Cheapflights users on 12/23. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:50 pmSTL - IST
1 stop17h 15mLufthansa
Wed 12/316:30 amIST - STL
1 stop16h 25mLufthansa
Deal found 12/23$1,407
This United Airlines deal was found by Cheapflights users on 12/22. 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.
Fri 12/263:50 pmSTL - IST
1 stop21h 55mUnited Airlines
Wed 12/316:30 amIST - STL
2 stops24h 52mUnited Airlines
Deal found 12/22$1,519
This Ovago deal was found by Cheapflights users on 12/23. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:50 pmSTL - IST
1 stop17h 15mLufthansa
Thu 1/16:30 amIST - STL
2 stops21h 52mLufthansa
Deal found 12/23$1,525
This Air Canada deal was found by Cheapflights users on 12/21. 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.
Fri 12/264:05 pmSTL - IST
2 stops19h 05mMultiple Airlines
Wed 12/319:10 amIST - STL
2 stops39h 19mMultiple Airlines
Deal found 12/21$1,643
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:08 pmMDW - IST
2 stops24h 42mDelta
Mon 1/55:55 pmIST - MDW
2 stops37h 12mDelta
Deal found 12/21$1,644

Find flight deals from Illinois to Istanbul

Keep the following information in mind while searching for Illinois to Istanbul flight deals. Data was last updated December 23, 2025.

Round-trip from

$559
(Lufthansa)

One-way from

$301
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,144

Good round-trip deal

$697 or less

Good one-way deal

$554 or less
From Illinois to Istanbul
Search Deals
One-way flight from Illinois to Istanbul
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Highest demand for flights based on searches. 14% potential increase in price ($172 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Price to beat on a round-trip flight from Illinois to Istanbul.
Search Deals
Price to beat on a one-way flight from Illinois to Istanbul.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Istanbul 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 December 23, 2025.
Use the filters below to find and compare flights from Illinois to Istanbul Airport that are best for you.

Fly from

Illinois

Fly to

Istanbul

Route

Depart

Return

Price

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 2/11

11:05 am-5:25 pm

2 stops21h 20m

Istanbul

Wed 2/18

7:35 am-10:09 pm

2 stops23h 34m

$560

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 2/6

12:11 pm-5:25 pm

2 stops20h 14m

Istanbul

Tue 2/10

7:35 am-10:44 pm

2 stops24h 09m

$560

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 1/20

6:46 pm-1:00 am

2 stops21h 14m

Istanbul

Tue 1/27

2:55 pm-10:44 pm

2 stops40h 49m

$560

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sun 1/18

3:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Mon 2/16

6:30 am-9:05 pm

2 stops23h 35m

$572

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 2/27

6:45 pm-10:45 pm

2 stops19h 00m

Istanbul

Wed 3/4

6:30 am-8:23 pm

2 stops22h 53m

$576

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 3/4

3:50 pm-6:05 pm

1 stop17h 15m

Istanbul

Wed 4/1

5:40 am-1:25 pm

1 stop15h 45m

$583

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Mon 3/16

2:50 pm-5:55 pm

2 stops19h 05m

Istanbul

Wed 4/15

5:40 am-1:25 pm

1 stop15h 45m

$591

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sun 3/15

4:05 pm-10:45 pm

2 stops22h 40m

Istanbul

Wed 4/15

5:40 am-1:25 pm

1 stop15h 45m

$593

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 3/20

4:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Tue 4/14

1:55 pm-3:24 pm

2 stops33h 29m

$593

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 3/20

4:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Thu 4/16

1:55 pm-3:24 pm

2 stops33h 29m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

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

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

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

Currently, February is the cheapest month in which you can book a flight from Illinois to Istanbul Airport (average of $418). Flying from Illinois to Istanbul Airport in June is currently the most expensive (average of $851). 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 IST?

Find hourly flight availability from Illinois to Istanbul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

When flying from Illinois to Istanbul Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 33% versus a flight in the afternoon.

What is the cheapest day to fly from Illinois to Istanbul Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Istanbul. Price data was last updated on December 16, 2024.

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

Weekly flight availability from Illinois to Istanbul Airport

Explore weekly flight availability from Illinois to Istanbul. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 23, 2025.

The most flights from USIL to IST are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Istanbul. 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 Istanbul Airport?

    A quick flight from Illinois to Istanbul Airport can take about 19h. British Airways provides one of the quickest options available for as low as $576. The distance from Illinois to Istanbul Airport is about 5707 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 Istanbul Airport one-way?

    To fly one-way, consider booking your trip with Turkish Airlines, which is currently one of the cheapest options available, starting at $321. Air Serbia flights start at $443 while deals on Royal Jordanian start at $447 one-way.

  • What are the most popular routes from Illinois to Istanbul Airport?

    While some choose either Chicago Midway - Istanbul or Lambert-St Louis - Istanbul, Chicago O'Hare Intl - Istanbul is the most popular route from Illinois to Istanbul Airport.

  • What are the most reliable airlines from Illinois to Istanbul Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Istanbul Airport on time: Pakistan International Airlines (68%), MIAT Mongolian (68%), Turkish Airlines (56%).

  • What are the cheapest flights from Illinois to Istanbul Airport?

    Looking at all options, your cheapest flight can be booked for $440. While the most popular route (Chicago O'Hare Intl - Istanbul) can be booked for $662 on average, our data indicates $1,650 when flying from Illinois to Istanbul Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Istanbul 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 Istanbul Airport?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Istanbul Airport (average of $418). Flying from Illinois to Istanbul Airport in June is currently the most expensive (average of $851). 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 Istanbul

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 Istanbul

Discover the top 10 airlines that operate flights from Illinois to Istanbul. 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$421Average$658FlexibilityNo cancel feeOn-time76%
Air SerbiaCheapest$422Average$916FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$664Average$1,014FlexibilityNo cancel feeOn-time77%
KLMCheapest$719Average$775FlexibilityNo cancel feeOn-time75%
Royal JordanianCheapest$742Average$791FlexibilityNo cancel feeOn-time61%
LOTCheapest$746Average$1,058FlexibilityNo cancel feeOn-time81%
Etihad AirwaysCheapest$757Average$865FlexibilityNo cancel feeOn-time75%
DeltaCheapest$774Average$1,118FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$777Average$1,150FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$791Average$1,120FlexibilityNo cancel feeOn-time69%

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