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Cheap flights from St. Louis to Istanbul from $425

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Istanbul departing on 9/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Istanbul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 10:45 pmSTL  Lambert-St Louis-IST Istanbul
22h 05m1 stop Frankfurt am Main
Multiple Airlines Logo
5:30 am - 3:26 pmIST  Istanbul-STL Lambert-St Louis
42h 56m2 stops Kastrup Copenhagen Toronto Pearson Intl
$848Multiple Airlines
Sun, Jan 10 - Sun, Jan 24
Lufthansa Logo
1:08 pm - 2:50 amSTL  Lambert-St Louis-IST Istanbul
28h 42m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
Lufthansa Logo
4:30 am - 9:13 pmIST  Istanbul-STL Lambert-St Louis
25h 43m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl
$857Lufthansa
Sun, Jan 10 - Sat, Jan 23
Multiple Airlines Logo
3:40 pm - 10:45 pmSTL  Lambert-St Louis-IST Istanbul
22h 05m1 stop Frankfurt am Main
Multiple Airlines Logo
5:30 am - 3:26 pmIST  Istanbul-STL Lambert-St Louis
42h 56m2 stops Kastrup Copenhagen Toronto Pearson Intl
$863Multiple Airlines
Fri, Nov 6 - Wed, Nov 18
Lufthansa Logo
3:40 pm - 10:45 pmSTL  Lambert-St Louis-IST Istanbul
22h 05m1 stop Frankfurt am Main
Lufthansa Logo
6:30 am - 1:45 pmIST  Istanbul-STL Lambert-St Louis
16h 15m1 stop Frankfurt am Main
$866Lufthansa
Sun, Jan 10 - Sun, Jan 24
British Airways Logo
11:32 am - 5:30 pmSTL  Lambert-St Louis-IST Istanbul
20h 58m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
7:40 am - 7:22 pmIST  Istanbul-STL Lambert-St Louis
20h 42m2 stops London Heathrow Chicago O'Hare Intl
$870British Airways
Fri, Nov 6 - Wed, Nov 18
United Airlines Logo
6:30 am - 10:45 pmSTL  Lambert-St Louis-IST Istanbul
31h 15m3 stops Newark Montreal Pierre Elliott Trudeau Intl Frankfurt am Main
United Airlines Logo
6:30 am - 11:09 pmIST  Istanbul-STL Lambert-St Louis
25h 39m2 stops Frankfurt am Main Chicago O'Hare Intl
$879United Airlines
Sun, Jan 10 - Sun, Jan 24
United Airlines Logo
3:30 pm - 9:25 pmSTL  Lambert-St Louis-IST Istanbul
21h 55m1 stop Frankfurt am Main
United Airlines Logo
5:40 am - 9:21 pmIST  Istanbul-STL Lambert-St Louis
23h 41m3 stops Frankfurt am Main Austin Bergstrom Chicago O'Hare Intl
$908United Airlines
Mon, Sep 14 - Tue, Sep 29
British Airways Logo
2:54 pm - 12:50 amSTL  Lambert-St Louis-IST Istanbul
24h 56m2 stops Boston Logan Intl London Heathrow
British Airways Logo
9:25 pm - 9:08 pmIST  Istanbul-STL Lambert-St Louis
32h 43m2 stops London Heathrow Chicago O'Hare Intl
$955British Airways
Sun, Jan 10 - Sun, Jan 24
KLM Logo
6:20 pm - 9:00 pmSTL  Lambert-St Louis-SAW Istanbul Sabiha Gokcen
18h 40m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol
KLM Logo
8:50 am - 8:35 pmSAW  Istanbul Sabiha Gokcen-STL Lambert-St Louis
19h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$996KLM
Mon, Sep 21 - Tue, Sep 29
KLM Logo
2:30 pm - 5:05 pmSTL  Lambert-St Louis-SAW Istanbul Sabiha Gokcen
18h 35m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
KLM Logo
12:45 pm - 11:54 pmSAW  Istanbul Sabiha Gokcen-STL Lambert-St Louis
19h 09m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$997KLM
Tue, Sep 29 - Thu, Oct 8

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British Airways flights from St. Louis to Istanbul

Our best British Airways deals on St. Louis to Istanbul flight tickets
British Airways
Nov 6
STL11:32 amLambert-St Louis
20h 58m
2 stops
IST5:30 pmIstanbul
Nov 18
IST7:40 amIstanbul
20h 42m
2 stops
STL7:22 pmLambert-St Louis
$870
British Airways
Jan 10
STL2:54 pmLambert-St Louis
24h 56m
2 stops
IST12:50 amIstanbul
Jan 24
IST9:25 pmIstanbul
32h 43m
2 stops
STL9:08 pmLambert-St Louis
$955
British Airways
Aug 22
STL5:13 pmLambert-St Louis
37h 17m
2 stops
IST2:30 pmIstanbul
Sep 7
IST8:15 pmIstanbul
35h 59m
2 stops
STL12:14 amLambert-St Louis
$1,088

Lufthansa flights from St. Louis to Istanbul

Our best Lufthansa deals on St. Louis to Istanbul flight tickets
Lufthansa
Jan 10
STL1:08 pmLambert-St Louis
28h 42m
2 stops
IST2:50 amIstanbul
Jan 23
IST4:30 amIstanbul
25h 43m
2 stops
STL9:13 pmLambert-St Louis
$857
Lufthansa
Jan 10
STL3:40 pmLambert-St Louis
22h 05m
1 stop
IST10:45 pmIstanbul
Jan 24
IST6:30 amIstanbul
16h 15m
1 stop
STL1:45 pmLambert-St Louis
$866
Lufthansa
Sep 14
STL3:30 pmLambert-St Louis
13h 30m
1 stop
IST1:00 pmIstanbul
Sep 28
IST3:45 amIstanbul
17h 40m
2 stops
STL1:25 pmLambert-St Louis
$875

momondo 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, momondo users made 832,500 searches. Data last updated August 15, 2026.
Use the filters below to find and compare flights from St. Louis to Istanbul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Sun 1/10

3:40 pm-10:45 pm

1 stop22h 05m

Istanbul

Sun 1/24

5:30 am-3:26 pm

2 stops42h 56m

$848

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Sun 1/10

1:08 pm-2:50 am

2 stops28h 42m

Istanbul

Sat 1/23

4:30 am-9:13 pm

2 stops25h 43m

$857

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Fri 11/6

3:40 pm-10:45 pm

1 stop22h 05m

Istanbul

Wed 11/18

5:30 am-3:26 pm

2 stops42h 56m

$863

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Sun 1/10

3:40 pm-10:45 pm

1 stop22h 05m

Istanbul

Sun 1/24

6:30 am-1:45 pm

1 stop16h 15m

$866

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Fri 11/6

11:32 am-5:30 pm

2 stops20h 58m

Istanbul

Wed 11/18

7:40 am-7:22 pm

2 stops20h 42m

$870

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Sun 1/10

6:30 am-10:45 pm

3 stops31h 15m

Istanbul

Sun 1/24

6:30 am-11:09 pm

2 stops25h 39m

$879

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Mon 9/14

3:30 pm-9:25 pm

1 stop21h 55m

Istanbul

Tue 9/29

5:40 am-9:21 pm

3 stops23h 41m

$908

St. LouisIstanbul

STL Lambert-St Louis - IST Istanbul

STLIST

Lambert-St Louis

Sun 1/10

2:54 pm-12:50 am

2 stops24h 56m

Istanbul

Sun 1/24

9:25 pm-9:08 pm

2 stops32h 43m

$955

St. LouisIstanbul

STL Lambert-St Louis - SAW Istanbul Sabiha Gokcen

STLSAW

Lambert-St Louis

Mon 9/21

6:20 pm-9:00 pm

2 stops18h 40m

Istanbul Sabiha Gokcen

Tue 9/29

8:50 am-8:35 pm

2 stops19h 45m

$996
Quickest round-trip

St. LouisIstanbul

STL Lambert-St Louis - SAW Istanbul Sabiha Gokcen

STLSAW

Lambert-St Louis

Tue 9/29

2:30 pm-5:05 pm

2 stops18h 35m

Istanbul Sabiha Gokcen

Thu 10/8

12:45 pm-11:54 pm

2 stops19h 09m

$997

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Istanbul from

How to get the cheapest flight ticket from St. Louis to Istanbul

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Istanbul?

Prices are currently typical for flights on this route.

Typical prices usually range from $694 to $1,355.
The lowest price recently found on this route was $848.

What is the cheapest month to fly to Istanbul?

In general, December is the cheapest month to fly from St. Louis to Istanbul. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $597. If you aren’t able to travel to Istanbul during the month of December, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $671.

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

You are more likely to see cheaper flights to Istanbul from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Istanbul for around $954 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Istanbul from St. Louis for as low as $667 on momondo.

Cheap St. Louis to Istanbul flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Istanbul

Fastest flight time

18h 40m

Direct flights

None
The fastest flight from St. Louis to Istanbul takes 18h 40m
There are no direct flights from St. Louis to Istanbul. There are no popular flight routes from St. Louis to Istanbul.
Search flight deals

Frequently asked questions about flying from St. Louis to Istanbul

  • How far is Lambert-St Louis to Istanbul by plane?

    There are 5728.1 mi between Lambert-St Louis and Istanbul. In terms of flight time, this usually takes a little over 18h 40m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Istanbul?

    Prices for flights from Lambert-St Louis Airport to Istanbul were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Istanbul?

  • How old do you have to be to fly from Lambert-St Louis Airport to Istanbul?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Istanbul.

  • What documentation or ID do you need to fly to Istanbul?

    The travel and health documents you'll need for your trip to Istanbul may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Istanbul. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Istanbul

Compare and see reviews for airlines that fly from St. Louis to Istanbul with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $576Free CancellationRating
6.7
8,164 reviews
Search British Airways flights
LufthansaPriceFrom $585Free CancellationRating
6.8
8,194 reviews
Search Lufthansa flights
DeltaPriceFrom $589Free CancellationRating
7.8
8,508 reviews
Search Delta flights
KLMPriceFrom $608Free CancellationRating
7.8
1,559 reviews
Search KLM flights
United AirlinesPriceFrom $633Free CancellationRating
7.4
10,111 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $866Free CancellationRating
7.4
4,474 reviews
Search Turkish Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Istanbul?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Istanbul. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Istanbul with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Istanbul flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Istanbul?

Once all potential St. Louis to Istanbul flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Istanbul right now. Can momondo alert me if prices change?

Price alerts on flights to Istanbul from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to Türkiye (Turkey)

Fly into one of these airports located in Istanbul

Airports listed have a maximum distance of 20.9 mi from Istanbul
Istanbul Airport
Istanbul Sabiha Gokcen Airport