$721+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IST
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Istanbul with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Istanbul
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Best
Last-minute
One-way
Cheapest flights from St. Louis to IstanbulExplore 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 September 23, 2026.
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 September 23, 2026.
This Air France deal was found by Cheapflights users on 9/19. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/12:33 pm -
2 stops18h 12m
Tue 12/87:15 am -
2 stops25h 50m
Deal found 9/19![Air France logo]()
$817
This KLM deal was found by Cheapflights users on 9/19. 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.
Tue 10/202:38 pm -
2 stops17h 42m
Thu 11/267:15 am -
2 stops24h 38m
Deal found 9/19![Multiple Airlines logo]()
$824
This Gotogate deal was found by Cheapflights users on 9/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:30 pm -
1 stop17h 25m
Thu 11/267:05 pm -
1 stop27h 40m
Deal found 9/19![Lufthansa logo]()
$839
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:47 pm -
2 stops27h 38m
Thu 11/127:40 am -
2 stops24h 53m
Deal found 9/22![British Airways logo]()
$840
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
2 stops25h 37m
Thu 11/127:05 pm -
1 stop27h 40m
Deal found 9/22![Lufthansa logo]()
$846
This United deal was found by Cheapflights users on 9/21. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:17 pm -
2 stops24h 28m
Tue 12/87:05 pm -
1 stop27h 40m
Deal found 9/21![Multiple Airlines logo]()
$854
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:17 pm -
2 stops17h 38m
Wed 12/237:15 am -
2 stops23h 55m
Deal found 9/18![Multiple Airlines logo]()
$888
This British Airways deal was found by Cheapflights users on 9/22. 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.
Fri 11/65:29 pm -
2 stops22h 06m
Fri 11/138:25 am -
2 stops22h 50m
Deal found 9/22![British Airways logo]()
$914
This Air France deal was found by Cheapflights users on 9/19. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:22 pm -
2 stops17h 23m
Sat 10/316:00 pm -
2 stops31h 28m
Deal found 9/19![Multiple Airlines logo]()
$925
Best flights from St. Louis to IstanbulDiscover carefully curated flight deals from St. Louis to Istanbul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from St. Louis to Istanbul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Tue 2/23:21 pm -
2 stops22h 24m
Fri 2/56:30 am -
1 stop16h 15m
Deal found 9/22![United Airlines logo]()
$825
This United deal was found by Cheapflights users on 9/19. 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.
Tue 12/11:17 pm -
2 stops24h 28m
Tue 12/87:05 pm -
1 stop27h 40m
Deal found 9/19![Multiple Airlines logo]()
$854
This British Airways deal was found by Cheapflights users on 9/22. 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.
Fri 11/65:29 pm -
2 stops22h 06m
Fri 11/138:25 am -
2 stops22h 50m
Deal found 9/22![British Airways logo]()
$914
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:17 pm -
2 stops17h 38m
Wed 12/237:15 am -
2 stops23h 55m
Deal found 9/18![Multiple Airlines logo]()
$888
This Air France deal was found by Cheapflights users on 9/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:22 pm -
2 stops17h 23m
Sat 10/316:00 pm -
2 stops31h 28m
Deal found 9/20![Multiple Airlines logo]()
$925
Last-minute flights from St. Louis to IstanbulDiscover last-minute flight deals from St. Louis to Istanbul. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Istanbul. Data last updated September 23, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/63:12 pm -
2 stops41h 43m
Wed 10/145:40 am -
1 stop15h 45m
Deal found 9/19![United Airlines logo]()
$1,031
This KLM deal was found by Cheapflights users on 9/19. 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.
Tue 10/202:38 pm -
2 stops17h 42m
Thu 11/267:15 am -
2 stops24h 38m
Deal found 9/19![Multiple Airlines logo]()
$824
This Gotogate deal was found by Cheapflights users on 9/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:30 pm -
1 stop17h 25m
Thu 11/267:05 pm -
1 stop27h 40m
Deal found 9/19![Lufthansa logo]()
$839
This Air France deal was found by Cheapflights users on 9/19. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:22 pm -
2 stops17h 23m
Sat 10/316:00 pm -
2 stops31h 28m
Deal found 9/19![Multiple Airlines logo]()
$925
This Air France deal was found by Cheapflights users on 9/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:38 pm -
2 stops19h 17m
Thu 11/127:15 am -
2 stops25h 41m
Deal found 9/21![Air France logo]()
$817
This FlightHub deal was found by Cheapflights users on 9/21. 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.
Wed 10/2812:47 pm -
2 stops27h 38m
Thu 11/127:40 am -
2 stops24h 53m
Deal found 9/21![British Airways logo]()
$840
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:08 pm -
2 stops25h 37m
Thu 11/127:05 pm -
1 stop27h 40m
Deal found 9/22![Lufthansa logo]()
$846
One-way flights from St. Louis to IstanbulSearch for one-way flight options from St. Louis to Istanbul. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from St. Louis to Istanbul. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This FlightHub deal was found by Cheapflights users on 9/21. 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.
Wed 9/308:00 am -
1 stop22h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Turkish Airlines logo]()
$721
This KAYAK deal was found by Cheapflights users on 9/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:20 pm -
2 stops16h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Lufthansa logo]()
$736
This United Airlines deal was found by Cheapflights users on 9/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:30 am -
3 stops29h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![United Airlines logo]()
$742
Find 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 September 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $817 (Air France) |
One-way from | $721 (FlightHub) |
Popular in | June |
Cheapest in | December |
Average price | $1,001 |
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 7,457,451 searches. Data last updated September 23, 2026.
Use the filters below to find and compare flights from St. Louis to Istanbul Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Wed 9/30
8:00 am-2:50 pm
1 stop22h 50m
Istanbul
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$721
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Wed 9/30
7:30 am-9:25 pm
3 stops29h 55m
Istanbul
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$742
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Tue 2/2
3:21 pm-10:45 pm
2 stops22h 24m
Istanbul
Fri 2/5
6:30 am-1:45 pm
1 stop16h 15m
$825
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Tue 12/1
1:17 pm-10:45 pm
2 stops24h 28m
Istanbul
Tue 12/8
7:05 pm-1:45 pm
1 stop27h 40m
$854
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Tue 12/15
2:17 pm-4:55 pm
2 stops17h 38m
Istanbul
Wed 12/23
7:15 am-10:10 pm
2 stops23h 55m
$888
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Fri 11/6
5:29 pm-12:35 am
2 stops22h 06m
Istanbul
Fri 11/13
8:25 am-10:15 pm
2 stops22h 50m
$914
St. LouisIstanbul
STL Lambert-St Louis - IST Istanbul
STLIST
Lambert-St Louis
Sat 10/24
4:22 pm-5:45 pm
2 stops17h 23m
Istanbul
Sat 10/31
6:00 pm-5:28 pm
2 stops31h 28m
$925
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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.
STL-IST
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
Prices
More
How far ahead should I book a flight from St. Louis to Istanbul Airport?
The best time to book flights from St. Louis to Istanbul Airport is 28 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, December is the cheapest month in which you can book a flight from St. Louis to Istanbul Airport (average of $597). Flying from St. Louis to Istanbul Airport in June is currently the most expensive (average of $1,357). 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.
How much does it cost to fly round-trip from St. Louis to Istanbul Airport?
Airfare is below average for this route at the moment.
St. Louis to Istanbul Airport flights typically cost between $924 and $1,108 in December.The cheapest round-trip price found within the last 5 days was $817 on Air France (Dec 1-Dec 8).
What’s the top layover airport for flights from St. Louis to Istanbul Airport?
Share of 1-stop round-trip flights from St. Louis to Istanbul Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Frankfurt am Main (FRA) – chosen by Cheapflights users on 78% of 1-stop itineraries from St. Louis to Istanbul Airport on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Istanbul Airport?
Average round-trip fare for 1-stop flights from St. Louis to Istanbul Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Frankfurt am Main (FRA) is the most affordable 1-stop option, with an average round-trip price of $708.
What’s the fastest layover option from St. Louis to Istanbul Airport?
Shortest average travel time for 1-stop one-way flights from St. Louis to Istanbul Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Frankfurt am Main (FRA) have the shortest average one-way travel time for 1-stop routes: 13h 29m.
Which airport typically offers the quickest layover for flights from St. Louis to Istanbul Airport?
Average layover duration for 1-stop one-way flights from St. Louis to Istanbul Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 2h 05m.
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 September 23, 2026.
Get a feel of what it's like to fly with KLM,Delta, andTurkish Airlines 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.
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Entertainment
7.2
Food
7.3
Crew
8.4
Boarding
7.8
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
Traveling to a place near Istanbul Airport?
Book flights to Istanbul Airport if you plan to visit one of these locationsYalova
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Top 6 airlines flying from St. Louis to Istanbul
Discover the top 6 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 7,457,451 searches. Data last updated September 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$576 | Average$1,094 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$586 | Average$1,048 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$589 | Average$944 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$608 | Average$1,101 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$633 | Average$1,074 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$866 | Average$1,321 | FlexibilityNo cancel fee | On-time77% |