$454 Cheap Flights from St. Louis (STL) to Istanbul (IST)

View $454 flight on Wed, Nov 19, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Istanbul Airport (IST)

Cheap Flights from St. Louis to Istanbul (STL-IST)

Prices were available within the past 7 days and start at $454 for one-way flights and $554 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Nov 19 - Wed, Nov 26
STL
St. Louis
IST
Istanbul
$554 Roundtrip, just found
$554
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 19 from St. Louis to Istanbul, returning Wed, Nov 26, priced at $554 just found
Air Canada
Sun, Nov 9 - Sun, Nov 23
STL
St. Louis
IST
Istanbul
$557 Roundtrip, just found
$557
Roundtrip
just found
Select Air Canada flight, departing Sun, Nov 9 from St. Louis to Istanbul, returning Sun, Nov 23, priced at $557 just found
Air Canada
Mon, Jan 12 - Wed, Jan 28
STL
St. Louis
IST
Istanbul
$558 Roundtrip, found 12 hours ago
$558
Roundtrip
found 12 hours ago
Select Air Canada flight, departing Mon, Jan 12 from St. Louis to Istanbul, returning Wed, Jan 28, priced at $558 found 12 hours ago
Lufthansa
Sun, Nov 9 - Sun, Nov 23
STL
St. Louis
IST
Istanbul
$561 Roundtrip, just found
$561
Roundtrip
just found
Select Lufthansa flight, departing Sun, Nov 9 from St. Louis to Istanbul, returning Sun, Nov 23, priced at $561 just found
Lufthansa
Wed, Jan 21 - Fri, Jan 30
STL
St. Louis
IST
Istanbul
$563 Roundtrip, found 2 hours ago
$563
Roundtrip
found 2 hours ago
Select Lufthansa flight, departing Wed, Jan 21 from St. Louis to Istanbul, returning Fri, Jan 30, priced at $563 found 2 hours ago
Air Canada
Wed, Nov 19 - Wed, Nov 26
STL
St. Louis
IST
Istanbul
$564 Roundtrip, just found
$564
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 19 from St. Louis to Istanbul, returning Wed, Nov 26, priced at $564 just found
Air Canada
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
IST
Istanbul
$565 Roundtrip, found 12 hours ago
$565
Roundtrip
found 12 hours ago
Select Air Canada flight, departing Tue, Jan 20 from St. Louis to Istanbul, returning Tue, Feb 3, priced at $565 found 12 hours ago
United
Wed, Dec 31 - Wed, Jan 21
STL
St. Louis
IST
Istanbul
$567 Roundtrip, found 3 days ago
$567
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 31 from St. Louis to Istanbul, returning Wed, Jan 21, priced at $567 found 3 days ago
American Airlines
Sat, Nov 15 - Wed, Dec 3
STL
St. Louis
IST
Istanbul
$575 Roundtrip, found 7 hours ago
$575
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Sat, Nov 15 from St. Louis to Istanbul, returning Wed, Dec 3, priced at $575 found 7 hours ago
British Airways
Wed, Jan 21 - Mon, Jan 26
STL
St. Louis
IST
Istanbul
$577 Roundtrip, found 5 days ago
$577
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jan 21 from St. Louis to Istanbul, returning Mon, Jan 26, priced at $577 found 5 days ago

Find the cheapest month to fly from St. Louis (STL) to Istanbul (IST)

November is typically the cheapest month to fly

From $605 - $1,454 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST) cost?
Secure a cheap one-way flight from $454 or cheap return flight from $554 from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST)?
November is the most affordable month to fly from STL to IST. Avoiding peak travel times is often the key to scoring lower fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from STL to IST. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to IST?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST) last-minute?
Holding off until just before your departure to book a ticket from STL to IST often results in higher prices. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for a better chance of scoring a bargain.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Istanbul (IST)?
If you booked your STL to IST flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Istanbul
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, KLM, Lufthansa, Turkish Airlines, United
Roundtrip price
$553
Distance
5712 mi

Book with confidence

Book with confidence

St. Louis to Istanbul Flights

The cheapest times to fly from St. Louis to Istanbul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Istanbul are during the month of November. You can find some of the cheapest flights from St. Louis to Istanbul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Istanbul

Sunday is one of the best days to book for cheap flights from St. Louis to Istanbul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Istanbul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Istanbul in 2025. You can also book with separate airlines for your outbound and return journeys, from $454 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Istanbul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Istanbul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Istanbul Flights

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Explore a world of travel with Expedia

*Available to One Key members.