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$378+ Cheap flights from St. Louis (STL) to Istanbul

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IST
Oct 31 — Nov 71
Fri 10/31
Fri 11/7
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Istanbul are usually found in March or September, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap 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 (TR5). 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 October 1, 2025.

Round-trip from

$551
(FlightHub)

One-way from

$378
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$1,047
From Lambert-St Louis to Istanbul
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One-way flight from Lambert-St Louis to Istanbul
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Highest demand for flights based on searches. 14% potential increase in price ($194 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from St. Louis to Istanbul

Cheapest flights from St. Louis to Istanbul
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 October 1, 2025.

This FlightHub deal was found by Cheapflights users on 9/30. 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.
Mon 11/174:05 pmSTL - IST
2 stops19h 05mAir Canada
Mon 11/247:45 pmIST - STL
2 stops52h 44mAir Canada
Deal found 9/30$551
This United deal was found by Cheapflights users on 10/1. 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.
Wed 11/53:50 pmSTL - IST
1 stop21h 55mMultiple Airlines
Wed 2/257:45 pmIST - STL
2 stops52h 44mMultiple Airlines
Deal found 10/1$556
This Delta deal was found by Cheapflights users on 10/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:30 pmSTL - IST
2 stops29h 20mDelta
Tue 2/244:50 amIST - STL
2 stops20h 11mDelta
Deal found 10/1$588
This Gotogate deal was found by Cheapflights users on 9/29. 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.
Mon 12/14:05 pmSTL - IST
2 stops19h 05mAir Canada
Thu 12/117:45 pmIST - STL
2 stops52h 44mAir Canada
Deal found 9/29$601
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/304:05 pmSTL - IST
2 stops19h 05mMultiple Airlines
Wed 12/106:30 amIST - STL
1 stop16h 25mMultiple Airlines
Deal found 9/29$606
This United deal was found by Cheapflights users on 9/30. 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 11/257:00 amSTL - IST
2 stops30h 45mMultiple Airlines
Mon 12/17:45 pmIST - STL
2 stops52h 44mMultiple Airlines
Deal found 9/30$610
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/14:05 pmSTL - IST
2 stops19h 05mMultiple Airlines
Thu 12/117:00 pmIST - STL
1 stop27h 55mMultiple Airlines
Deal found 9/29$615
This FlightHub deal was found by Cheapflights users on 9/29. 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.
Thu 11/274:05 pmSTL - IST
2 stops19h 05mAir Canada
Mon 12/87:45 pmIST - STL
2 stops52h 44mAir Canada
Deal found 9/29$651
This Ovago deal was found by Cheapflights users on 9/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:54 pmSTL - IST
2 stops20h 11mBritish Airways
Mon 11/33:15 pmIST - STL
2 stops34h 32mBritish Airways
Deal found 9/29$653
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/306:00 amSTL - IST
2 stops26h 25mBritish Airways
Wed 12/102:45 pmIST - STL
2 stops38h 36mBritish Airways
Deal found 9/29$655
This KLM deal was found by Cheapflights users on 9/30. 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.
Mon 11/172:36 pmSTL - SAW
2 stops17h 49mKLM
Mon 11/249:00 amSAW - STL
2 stops21h 58mKLM
Deal found 9/30$734
This KLM deal was found by Cheapflights users on 10/1. 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.
Wed 11/55:15 pmSTL - SAW
2 stops19h 05mKLM
Wed 2/259:00 amSAW - STL
2 stops20h 39mKLM
Deal found 10/1$735

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 2,558,603 searches. Data last updated October 1, 2025.
Use the filters below to find and compare flights from St. Louis to Istanbul that are best for you.

Fly from

St. Louis

Fly to

Istanbul

Route

Depart

Return

Price

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Mon 11/17

4:05 pm-8:10 pm

2 stops19h 05m

Istanbul

Mon 11/24

7:45 pm-3:29 pm

2 stops52h 44m

$551

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 11/5

3:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Wed 2/25

7:45 pm-3:29 pm

2 stops52h 44m

$556

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 2/10

3:11 pm-5:45 pm

2 stops17h 34m

Istanbul

Mon 2/16

7:45 pm-3:29 pm

2 stops52h 44m

$561

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 2/10

1:00 pm-3:50 am

2 stops29h 50m

Istanbul

Sun 2/15

4:50 am-11:10 pm

2 stops27h 20m

$587

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sun 1/18

4:05 pm-8:10 pm

2 stops19h 05m

Istanbul

Mon 2/16

7:45 pm-3:29 pm

2 stops52h 44m

$601

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Tue 11/25

7:00 am-10:45 pm

2 stops30h 45m

Istanbul

Mon 12/1

7:45 pm-3:29 pm

2 stops52h 44m

$610

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Sun 1/18

3:50 pm-10:45 pm

1 stop21h 55m

Istanbul

Mon 2/16

7:45 pm-3:29 pm

2 stops52h 44m

$620

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Mon 10/27

6:43 pm-10:45 pm

2 stops20h 02m

Istanbul

Sat 11/8

7:00 pm-1:55 pm

1 stop27h 55m

$651

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Thu 11/27

4:05 pm-8:10 pm

2 stops19h 05m

Istanbul

Mon 12/8

7:45 pm-3:29 pm

2 stops52h 44m

$651

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

Wed 1/14

4:05 pm-8:10 pm

2 stops19h 05m

Istanbul

Sun 2/1

7:45 pm-3:29 pm

2 stops52h 44m

$651

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 40 results
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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.
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

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Istanbul. Price data was last updated on September 26, 2025.

The price you pay for your flight from St. Louis to Istanbul may vary depending on when you book. For the best chance of a lower fare, look to book 71 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Istanbul?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Istanbul (average of $909). Flying from St. Louis to Istanbul in June is currently the most expensive (average of $1,359). 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.

What is the cheapest time of day to fly from STL to IST?

Find hourly flight availability from St. Louis to Istanbul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 1, 2025.

It’s typically best to fly out from St. Louis to Istanbul at noon. Doing so could potentially save you 6% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip from St. Louis to Istanbul?

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 October 1, 2025.
See what other customers who have flown with Delta, Turkish Airlines, and Air Canada from St. Louis to Istanbul have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,984 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
10,223 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,443 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,413 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What airport do you fly from for flights from St. Louis to Istanbul?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Istanbul. You should not have trouble finding flights to Istanbul from Lambert-St Louis; the airport handles an average of 0 outbound flights to Istanbul per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Istanbul. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How long is the flight from St. Louis to Istanbul?

    There are many flights that can get you from St. Louis to Istanbul in 17h 49m. Fly via Air Canada, Delta, or KLM to get the fastest option. The distance from St. Louis to Istanbul is about 5746 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Istanbul round-trip?

    Cheapflights users have booked flights from St. Louis to Istanbul round-trip from $627. Other airlines that can offer you cheap pricing are KLM, from $647, and British Airways, from $662. Air Canada is priced at 43% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from St. Louis to Istanbul that include hotel bookings?

    Yes. In addition to deals on St. Louis to Istanbul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Istanbul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Istanbul.

  • Can I find deals for business class flights from St. Louis to Istanbul?

    Yes. Cheapflights offers flight deals from St. Louis to Istanbul by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Istanbul (average of $909). Flying from St. Louis to Istanbul in June is currently the most expensive (average of $1,359). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 8 airlines flying from St. Louis to Istanbul

Discover the top 8 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 2,558,603 searches. Data last updated October 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$627Average$1,158FlexibilityNo cancel feeOn-time67%
KLMCheapest$647Average$909FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$662Average$983FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$674Average$868FlexibilityNo cancel feeOn-time71%
DeltaCheapest$687Average$1,112FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$708Average$1,114FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$777Average$1,089FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$1,162Average$1,348FlexibilityNo cancel feeOn-time77%

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