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$525+ Cheap flights from St. Louis (STL) to Istanbul (IST)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IST
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Istanbul are usually found in March or August, booked 88 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Find flight deals from St. Louis to Istanbul

Cheapest flights from St. Louis to Istanbul
Explore the most affordable flight options available from St. Louis to Istanbul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/18. 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 11/166:43 pmSTL - IST
2 stops19h 02mLufthansa
Tue 12/27:00 pmIST - STL
1 stop27h 55mLufthansa
Deal found 10/18$525
This United deal was found by Cheapflights users on 10/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/173:14 pmSTL - IST
2 stops22h 31mMultiple Airlines
Mon 11/247:45 pmIST - STL
2 stops52h 44mMultiple Airlines
Deal found 10/18$561
This United Airlines deal was found by Cheapflights users on 10/18. 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.
Tue 12/212:55 pmSTL - IST
2 stops24h 50mUnited Airlines
Tue 12/96:30 amIST - STL
2 stops24h 28mUnited Airlines
Deal found 10/18$575
This CheapOair deal was found by Cheapflights users on 10/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/254:05 pmSTL - IST
2 stops19h 05mMultiple Airlines
Tue 12/27:00 pmIST - STL
1 stop27h 55mMultiple Airlines
Deal found 10/20$576
This Delta deal was found by Cheapflights users on 10/18. 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.
Sun 11/169:35 amSTL - IST
2 stops33h 15mDelta
Tue 12/25:55 pmIST - STL
2 stops47h 29mDelta
Deal found 10/18$581
This Delta deal was found by Cheapflights users on 10/18. 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.
Tue 11/181:20 pmSTL - IST
2 stops29h 30mDelta
Wed 12/34:50 amIST - STL
2 stops25h 12mDelta
Deal found 10/18$587
This Delta deal was found by Cheapflights users on 10/18. 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.
Sun 11/169:35 amSTL - IST
2 stops33h 15mDelta
Wed 12/34:50 amIST - STL
2 stops20h 16mDelta
Deal found 10/18$593
This Delta deal was found by Cheapflights users on 10/18. 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.
Sat 11/1510:45 amSTL - IST
2 stops32h 05mDelta
Wed 12/34:50 amIST - STL
2 stops27h 50mDelta
Deal found 10/18$600

Cheap flight deals from St. Louis to Istanbul

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Istanbul (IST). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$525
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,090
Provider with most accurate pricing for Lambert-St Louis-Istanbul flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Istanbul flights.
Search Deals
From Lambert-St Louis to Istanbul
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 October 20, 2025.
Use the filters below to find and compare flights from St. Louis to Istanbul Airport that are best for you.

Fly from

St. Louis

Fly to

Istanbul

Route

Depart

Return

Price

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 11/18

7:00 am-10:45 pm

2 stops30h 45m

Istanbul

Tue 11/25

7:45 pm-3:29 pm

2 stops52h 44m

$561

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sat 1/17

11:20 am-6:05 pm

2 stops21h 45m

Istanbul

Fri 1/30

6:30 am-1:55 pm

1 stop16h 25m

$566

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 1/14

3:50 pm-6:05 pm

1 stop17h 15m

Istanbul

Mon 2/2

6:30 am-11:59 pm

2 stops26h 29m

$568

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 1/16

3:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Tue 2/3

6:30 am-2:30 pm

2 stops17h 00m

$571

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Fri 1/16

3:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Thu 1/29

6:30 am-10:58 pm

2 stops25h 28m

$571

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Thu 1/15

11:22 am-6:05 pm

2 stops21h 43m

Istanbul

Sat 1/31

6:30 am-11:59 pm

2 stops26h 29m

$575

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sun 1/11

6:40 pm-10:45 pm

2 stops19h 05m

Istanbul

Thu 1/29

6:30 am-10:58 pm

2 stops25h 28m

$575

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 1/14

11:22 am-6:05 pm

2 stops21h 43m

Istanbul

Fri 1/30

6:30 am-10:58 pm

2 stops25h 28m

$575

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 2/11

12:01 pm-5:25 pm

2 stops20h 24m

Istanbul

Tue 2/17

7:35 am-9:44 pm

2 stops23h 09m

$577

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 11/18

5:14 pm-3:50 am

2 stops25h 36m

Istanbul

Tue 12/2

5:55 pm-6:37 pm

2 stops33h 42m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 12 results
1
2

Compare providers for flights from St. Louis to Istanbul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Istanbul in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
GotogatePrice Accuracy2 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Istanbul Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Istanbul Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Istanbul Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Istanbul Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Istanbul Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Istanbul

Have a flexible travel schedule? Discover the best time to fly to Istanbul from St. Louis 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 St. Louis to Istanbul Airport

How far ahead should I book a flight from St. Louis to Istanbul Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Istanbul. Price data was last updated on October 17, 2025.

The best time to book flights from St. Louis to Istanbul Airport is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Istanbul Airport?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Istanbul Airport (average of $576). Flying from St. Louis to Istanbul Airport in June is currently the most expensive (average of $1,160). 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 STL to IST?

Find hourly flight availability from St. Louis 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 October 20, 2025.

It’s typically best to fly out from St. Louis to Istanbul Airport at noon. Doing so could potentially save you 5% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip from St. Louis to Istanbul Airport?

Reviews of airlines servicing Istanbul

Get insights into the airlines that provide service to Istanbul. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Istanbul. Reviews last updated October 20, 2025.
Get a feel of what it's like to fly with Delta, Turkish Airlines, and Air Canada from St. Louis to Istanbul Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,978 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Turkish Airlines
7.3
Good
4,022 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,337 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,508 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,461 reviews
Delta
7.9
Good
7,978 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

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

  • What airport do you fly from for flights from St. Louis to Istanbul?

    If you book a flight to Istanbul from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Lambert-St Louis to Istanbul per day from 7 different airlines.

  • How long is the flight from St. Louis to Istanbul Airport?

    Airlines like United Airlines and Lufthansa fly from St. Louis to Istanbul Airport in about 17h 15m. The time it takes to get you to your destination can typically vary by up to 4h 30m. The distance from St. Louis to Istanbul Airport is about 5707 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Istanbul Airport round-trip?

    Currently priced at $576, British Airways will fly you from St. Louis to Istanbul Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and KLM - these airlines can fly you to your destination from $627 and $647, respectively. You may be able to fly from St. Louis to Istanbul Airport for 49% less than the average price by searching for these airlines.

  • Can I find deals for flights from St. Louis to Istanbul that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Istanbul?

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

  • Can I find deals for business class flights from St. Louis to Istanbul?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Istanbul Airport?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Istanbul Airport (average of $576). Flying from St. Louis to Istanbul Airport in June is currently the most expensive (average of $1,160). 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

Traveling to a place near Istanbul Airport?

Book flights to Istanbul Airport if you plan to visit one of these locations
Yalova

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Alternative routes for St. Louis to Istanbul

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Sabiha Gokcen flights
Kansas City to Istanbul flights
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Springfield to Istanbul flights

Top 7 airlines flying from St. Louis to Istanbul

Discover the top 7 airlines that operate flights from St. Louis 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$627Average$1,158FlexibilityNo cancel feeOn-time67%
KLMCheapest$647Average$909FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$662Average$983FlexibilityNo cancel feeOn-time70%
DeltaCheapest$687Average$1,126FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$708Average$1,115FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$752Average$1,089FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$1,162Average$1,350FlexibilityNo cancel feeOn-time77%

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