$435 Find Cheap Flights from St. Louis to Istanbul

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 6/22. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Istanbul

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Istanbul.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Istanbul.
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Everything you should know

Cheapest round-trip
$639
Typical prices: $1,083-$851
Delta
Sun 10/25Mon 11/9
STL - IST • 2 stops
Cheapest one-way
$435
Typical prices: $927-$1,046
Delta
Mon 6/22
STL - IST • 2 stops
Top airlines
Cheapest • from $639 (round-trip)
Best reviews • 7.9 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 6 weeks in advance save around 32% compared to booking last minute.
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Flight Deals
Booking Insights
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, Oct 25 - Mon, Nov 9
Delta Logo
2:18 pm - 5:55 pm
STL
-
IST
19h 37m
2 stops
Delta Logo
5:55 pm - 5:56 pm
IST
-
STL
33h 01m
2 stops
$639Delta
Tue, Jul 28 - Wed, Aug 26
Delta Logo
5:42 pm - 3:30 am
STL
-
IST
25h 48m
2 stops
Delta Logo
6:00 am - 11:37 pm
IST
-
STL
25h 37m
2 stops
$640Delta
Mon, Oct 26 - Fri, Nov 6
Delta Logo
2:18 pm - 5:55 pm
STL
-
IST
19h 37m
2 stops
Delta Logo
7:15 am - 8:12 am
IST
-
STL
33h 57m
2 stops
$645Delta
Mon, Jul 6 - Fri, Jul 17
Delta Logo
6:10 pm - 3:30 am
STL
-
IST
25h 20m
2 stops
Delta Logo
4:25 am - 11:53 pm
IST
-
STL
27h 28m
2 stops
$684Delta
Wed, May 27 - Sun, Jun 7
KLM Logo
6:04 pm - 9:00 pm
STL
-
SAW
18h 56m
2 stops
KLM Logo
8:50 am - 8:39 pm
SAW
-
STL
19h 49m
2 stops
$1,063KLM
Thu, May 28 - Mon, Jun 8
KLM Logo
6:04 pm - 9:00 pm
STL
-
SAW
18h 56m
2 stops
KLM Logo
8:50 am - 8:39 pm
SAW
-
STL
19h 49m
2 stops
$1,064KLM
Tue, Jul 28 - Wed, Aug 26
Multiple Airlines Logo
12:10 pm - 5:20 pm
STL
-
SAW
21h 10m
2 stops
Multiple Airlines Logo
9:20 am - 8:07 pm
SAW
-
STL
18h 47m
2 stops
$1,143Multiple Airlines
Sun, Aug 16 - Thu, Aug 20
Multiple Airlines Logo
2:40 pm - 4:45 pm
STL
-
SAW
18h 05m
2 stops
Multiple Airlines Logo
7:55 am - 8:07 pm
SAW
-
STL
20h 12m
2 stops
$1,420Multiple Airlines
Wed, Sep 16 - Tue, Nov 3
Qatar Airways Logo
6:06 am - 12:10 pm
STL
-
SAW
46h 04m
2 stops
Qatar Airways Logo
1:40 pm - 7:30 pm
SAW
-
STL
38h 50m
2 stops
$1,581Qatar Airways
Wed, Sep 16 - Tue, Nov 3
Qatar Airways Logo
4:29 pm - 12:10 pm
STL
-
SAW
35h 41m
2 stops
Qatar Airways Logo
1:40 pm - 3:29 pm
SAW
-
STL
34h 49m
2 stops
$1,661Qatar 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 October.

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 $479 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $968 and $794 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 6 weeks before departure, which saves you about 32% 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$435
Flight from St. Louis to Istanbul 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 3 days, the lowest price for a flight from St. Louis to Istanbul was $435 for a one-way ticket and $639 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.
7.9
DeltaOverall score based on 8465 reviews
8.5Crew
7.9Comfort
7.2Food
7.8Entertainment
8.1Boarding
Airline reviews

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

6.0 GoodSilvestre, Apr 2026
MCO - GRU
Read more Delta reviews

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

It was really nice journey i personally recommend klm flight

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

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

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.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

The ground crew members at check in counter were courteous. The boarding was seamless. Flight departed as scheduled. Service on board was great

Very comfortable in business class. Excellent service. Good food. Smooth trip.

The seats seems abit small and the reclining is too much, the seat in front of me came back too much and made it uncomfortable for me.

As a first time flyer with Turkish Airlines. My experience was very good due to the factor that there were to many passengers on the my first flight compared to my connecting flight. However, I know that nothing is perfect and all companies are trying to accommodate their passengers to the best way possible. I will always say, a FEW INCHES will go LONG WAY. That's something all airliners should consider, and not only the money aspect!!! A long time commitment is better than one time service! Thank you

Staff at the airport wasn't helpful or friendly. Probably the worst airport experience I have ever had, going and coming. The staff on the plane was better. Still not super friendly or personable. However, they were not rude like airport staff. They ran out of certain menu items. Maybe could have been prepared better? Overall just ok.

It was a pleasant experience. In flight entertainment could have been better

The desk crew at the LAX crew could do better. A girl named Mahesi was very abrasive and unfriendly. She needs a better customer service uproar.

It was peaceful excited We enjoyed it always Turkish peaceful excited

Istanbul to Lahore flight was less than standard for international business class cabins. Seat did not were not flat and it did not operate easily. I had to push buttons hard repeatedly to operate the seat. I was in 5A seat

IAH to Istanbul was outstanding across the board. The flight from Istanbul to Male was good, not great.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

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

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

1st class seats NOT REALLY 1st class or business class but like premier economy. Should be listed as such or named something else. I have flown 1st class with other airlines and they are nothing like it at all.

The seats in Premier Economy were very comfortable. The food was better than average. The way British Airways handled our seating was atrocious.

Worst airline in the world. They downgraded me from business class to economy with no compensation.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Overall ok. Best part has always been the sundae dessert.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

Even if you wait for connecting passengers you should not be an hour late departing waiting their luggage. Your passengers may have connections in the other end and you harm them.

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

Information on your arrival and departure airports