$433 Find Cheap Flights from St. Louis to Istanbul - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Istanbul departing on 12/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Everything you should know

Cheapest round-trip
$807
Typical prices: $597-$1,070
Lufthansa
Sun 11/1Tue 11/10
STL - IST • 2 stops
Cheapest one-way
$434
Overall average: $707
Lufthansa
Fri 12/25
STL - IST • 1 stop
Top airlines
Cheapest • from $807 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 25% compared to booking last minute.
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Istanbul that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Istanbul

Sun, Nov 1 - Tue, Nov 10
Lufthansa Logo
6:50 pm - 2:50 am
STL
-
IST
23h 00m
2 stops
Lufthansa Logo
7:05 pm - 1:45 pm
IST
-
STL
27h 40m
1 stop
$807Lufthansa
Mon, Nov 30 - Fri, Dec 11
Lufthansa Logo
6:50 pm - 2:50 am
STL
-
IST
23h 00m
2 stops
Lufthansa Logo
6:30 am - 1:45 pm
IST
-
STL
16h 15m
1 stop
$812Lufthansa
Wed, Nov 25 - Fri, Dec 11
United Airlines Logo
3:40 pm - 10:45 pm
STL
-
IST
22h 05m
1 stop
United Airlines Logo
6:30 am - 1:45 pm
IST
-
STL
16h 15m
1 stop
$813United Airlines
Sun, Nov 29 - Thu, Dec 10
United Airlines Logo
3:40 pm - 10:45 pm
STL
-
IST
22h 05m
1 stop
United Airlines Logo
6:30 am - 10:06 pm
IST
-
STL
24h 36m
2 stops
$823United Airlines
Sat, Nov 28 - Fri, Dec 11
Multiple Airlines Logo
4:05 pm - 10:45 pm
STL
-
IST
45h 40m
2 stops
Multiple Airlines Logo
4:30 am - 3:26 pm
IST
-
STL
43h 56m
2 stops
$853Multiple Airlines
Sun, Nov 29 - Sun, Dec 13
Multiple Airlines Logo
3:40 pm - 10:45 pm
STL
-
IST
22h 05m
1 stop
Multiple Airlines Logo
6:30 am - 3:26 pm
IST
-
STL
41h 56m
2 stops
$870Multiple Airlines
Sun, Nov 29 - Sat, Dec 12
British Airways Logo
11:32 am - 5:25 pm
STL
-
IST
20h 53m
2 stops
British Airways Logo
7:35 am - 8:21 pm
IST
-
STL
21h 46m
2 stops
$933British Airways
Fri, Nov 27 - Sat, Dec 12
KLM Logo
2:31 pm - 4:55 pm
STL
-
IST
17h 24m
2 stops
KLM Logo
7:15 am - 11:56 pm
IST
-
STL
25h 41m
2 stops
$957KLM
Tue, Oct 20 - Tue, Oct 27
KLM Logo
2:38 pm - 5:05 pm
STL
-
SAW
18h 27m
2 stops
KLM Logo
9:00 am - 9:14 pm
SAW
-
STL
20h 14m
2 stops
$993KLM
Sun, Nov 1 - Thu, Nov 5
British Airways Logo
8:29 am - 12:50 am
STL
-
IST
31h 21m
2 stops
British Airways Logo
7:35 am - 11:33 pm
IST
-
STL
24h 58m
2 stops
$1,055British Airways
Booking Insights

KAYAK's insights & trends for St. Louis to Istanbul flights

Get data-powered insights and trends into flights from St. Louis to Istanbul to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Istanbul?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Istanbul departing in August.

Flight prices are typical for this route right now.

Flights to Istanbul from St. Louis usually cost between $694 and $1,164 in August.
The lowest price found in the past 5 days was $862 on Lufthansa (Aug 26-Sep 9).

What is the cheapest month to fly from St. Louis to Istanbul?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Istanbul, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Istanbul is December, where tickets cost $597 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,357 and $1,225 respectively.

How far in advance should I book a flight from St. Louis to Istanbul?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Istanbul, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Istanbul, you should book around 5 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Cheapest flight

$433
Flight from St. Louis to Istanbul Sabiha Gokcen Airport

When to book flights from St. Louis to Istanbul

Are your dates flexible? Find out the best times to travel from St. Louis to Istanbul based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Istanbul

  • What is the cheapest flight from St. Louis to Istanbul?

    In the last 5 days, the lowest price for a flight from St. Louis to Istanbul was $433 for a one-way ticket and $807 for a round-trip.

  • Do I need a passport to fly between St. Louis and Istanbul?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Istanbul.

  • Which airports will I be using when flying from St. Louis to Istanbul?

    St. Louis is served by only 1 airport and there are 2 airports in Istanbul. You will leave St. Louis from Lambert-St Louis and you will be arriving in Istanbul at one of these airports: Istanbul or Istanbul Sabiha Gokcen.

  • Which aircraft models fly most regularly from St. Louis to Istanbul?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Istanbul?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Istanbul, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from St. Louis to Istanbul?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Istanbul.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Istanbul?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Istanbul from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Istanbul?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Istanbul with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Istanbul?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Istanbul from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from St. Louis to Istanbul

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Istanbul. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Istanbul? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1551 reviews
7.7Comfort
7.2Entertainment
7.3Food
8.4Crew
7.8Boarding
Airline reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

10.0 ExcellentEmily, Jul 2026
ORD - MSP
Read more KLM reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

Had to cancel and rebook, KLM connection was cancelled prior to departure, ended up flying to Munich on non-Delta carrier.

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Flight was delayed multiple time and for more than 1 hr. My onward flight from BOS to MCI was also delayed. These delays have caused me so much inconvenience and Delta does nothing to ensure flights take off on time. No one knew why the inbound flight was delayed and what was the issue.

Our flight was delayed by over 4 hours due to a maintenance issue. They announced a new plane was on the way. We were given a $12 food voucher ( airport food is quite expensive You can’t even by a water and a small snack for 12:00. 4 hours later we boarded and landed in Atlanta at 10:20 ish pm. Of course we missed our connection and we were given a hotel voucher and another food voucher ! We didn’t make it home until 11:00 the next day ! Unacceptable

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Delta has too many delays now days. It is 1:06 am now. I was supposed to land in Norfolk at 10:30 pm. I got re-booked through Detroit and I’m still in Detroit. I hope to be landed in Norfolk by 3am. I’ve been in airports for 12 hours as of right now. There is a weather delay now but most delays lately have been maintenance.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Average at every level . Poor entertainment selection. Boarding was very poor and disorganized. Flight was late by one hour .

Spent over $20k on for business class tickets from DFW. They used a very old Boeing 777 with old Business class cabin which was unclean and stained seats. On a route they normally operate the modern Boeing 787. The cabin heat was set to hot for 11 hours. On the IST LHE route the business class experience got even worse. They operate an even older Airbus A330 where trip was falling apart, seat recline did not operate and the whole experience left us hugely disappointed. Next time we likely will shift to better quality product which stands up to their hype. Turkish need to relook at their fleet plans and not use their worst assets of perceived week markets such as Pakistan.

The flight from Houston to Chicago was delayed, causing us to miss our connecting flight to Madrid, losing our Rental Car booking in Bologna taking alternative travel routes to get to our initial destination in Pizza by the 15th. We got the notification of the delay as we were traveling the 3 1/2 hours from Corpus Christi, Texas to Houston Texas for the initial flight. The delays hauling luggage all over Milan‘s Central train station to catch trains to get to Pizza the same day resulting us arriving in Pizza at 2 AM leaving us no time to rest as there was a 9 o’clock checkout time the next morning. The first 72 hours of the trip with nothing but headache, a knee injury from the excessive walking and a delayed car rental replacement, which ended up costing significantly more.

We flew business class and it was impressive. So comfortable with delicious food and very attentive and polite staff. Will definitely fly Turkish airlines again.

Amazing! One of the best kept secrets in air travel!

We fly Bussines class and we didn’t feel like it is. Out luggage didn’t arrive and we have to return again next day from our hotel to airport to get them. Still waiting. No information from Turkish airlines Very poor customer service I think booking through kayak it was wrong decision

Three screaming and crying children in business class made it very difficult to rest. The crew made no attempt to address the situation. I might as well have saved the money and flown economy. The parents were oblivious to the discomfort their children were causing. The lounge in Istanbul is wonderful, but did not make up for the misery on the flight. My business class seat power outlet was broken and I have a cpap. The crew couldn't fix it or move me to better seat. Fortunately , the passenger in front of me allowed me to plug into his power outlet.

I flew Business with my daughter and son. The service, friendliness of the staff and the comfort of the fully flat beds were phenomenal. Would definitely fly Turkish again soon.

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Not great!!! Seats in Business class were horrible; no cushion!!!

No entertainment since it was a 3 hr flight. Good leg room for economy.

The flight left an hour late and no explanation. Food was basically a few snacks out of bags and tiny cup of soda. Crew was pretty friendly.

Unable to get Lufthanza code to obtain a boarding pass for my flight. Had to exit and re-register to get on the flight. Extremely frustrating.

My flight was delayed for more than an hour due to planning amd scheduling issues all of which were Lufthansa's responsibility. They failed dismally at doing what was agreed upon and their reparations were inadequate and completely useless to us. The flight crew were lovely however the ground crew working out of their customer service were the modt rude and obnoxious people i have ever had the misfortune of meeting.

The The check in process was terrible on both ends. It was not clear if we should use the United, Lufthansa, or Aragrant number. It took over an hour to check in on the front end – and then at return the Lufthansa online check in failed multiple times and only after two calls to their phone number could we accomplish the task. The link to the Kayak site provided no access for check in. This difficulty and ambiguity on both ends will affect our interest in using Kayak for foreign travel in the future.

You lost my bag then waiting on the phone for 30 mins for customer service just to be directed to call another number

Boarding staff, crew and food needs a lot of improvement!! It was awful Aircraft was old with minimal legspace

The crew that checked at the gate was completely unprofessional, i had a child, stroller and a carry on luggage and the crew did not bother providing any help getting down 3 flight if stairs. I asked for hel and they ignored me

As I remember my last BA flight - mediocre at best. Uncomfortable with poor and minimal food and drinks. Screen broke shortly into flight so didn’t have access to entertainment either.

Business class to Istanbul. Packed flight. Cabin crew seemed incapable of differentiating between economy and business passengers with regard to access to the WC which meant whole flight I had people standing in aisle and leaning into my aisle seat, queueing for the front WC. Crew put it down to a lack of curtain between the two classes. The seats, for a 3hrs55 min flight were just standard seats with middle seat unoccupied. So nothing special apart from the food, which was mediocre. Aside from the roast chicken dinner (‘special’ traditional British menu option, which looked poor but tasted good I gather). However 2 king prawns does not make a main course salad.

Our flight from ORD was cancelled and BA rebooked is on a flight that originated before the time that they booked us on it. They did not realize we were already arrived in Chicago. Then American Airlines helped us get checked in to the new flight (the one BA assigned to us) which flight we did take although it was delayed about 2 hours, and our assigned seats that we paid for - on the original flight- were lost we did at least get to sit together. It was not too painful for all the changes and we made it to the UK alright though all in all with all the delays and cancellations the flight took about 20 hours to get us here.

though there was space in the cabin they asked us to check in our trolleys. As a result lots of things arrived damaged in Larnaca. They were fragile. When we asked the attendants why that.....they said talk to the captain!!! Unbelievable!

Terrible. Missed my flight to final destination because of delayed British Airways flight. Had to spend 12 hours in airport and $1500 for new plane tickets

I asked for a wheelchair. I have a back health condition. I had to walk a lot

Boarding = No one respected the boarding groups. The ground crew did nothing to enforce the boarding system. What is the point of being a Gold member when there are no benefits to that? Tired old plane

Boarding ,checking in was easy and quick . Comfort was not good.

The flight and the staff was excellent. Only bad thing is no entertainment and you have to pay for anything other than water.

Flight departed 45 mins late Crew great Food items missing from breakfast

Everything you need to know for your flight from St. Louis to Istanbul

Information on your arrival and departure airports