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$854+ Cheap flights from St. Louis (STL) to Singapore (SIN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
1 adult, Economy
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Cheap flight deals from St. Louis to Singapore

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Singapore (SIN). 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 August 7, 2025.

Round-trip from

$854
(Ovago)

Popular in

December

Cheapest in

August

Average price

$1,226
From Lambert-St Louis to Singapore Changi
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Singapore

Cheapest flights from St. Louis to Singapore
Explore the most affordable flight options available from St. Louis to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

This Ovago deal was found by Cheapflights users on 8/6. 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.
Tue 9/26:45 amSTL - SIN
2 stops29h 05mCathay Pacific
Tue 9/99:45 amSIN - STL
2 stops26h 05mCathay Pacific
Deal found 8/6$854
This oojo deal was found by Cheapflights users on 8/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:23 amSTL - SIN
2 stops33h 07mCathay Pacific
Tue 9/231:50 amSIN - STL
2 stops33h 03mCathay Pacific
Deal found 8/6$869
This oojo deal was found by Cheapflights users on 8/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:56 pmSTL - SIN
2 stops48h 34mCathay Pacific
Sun 9/288:05 pmSIN - STL
2 stops40h 43mCathay Pacific
Deal found 8/6$875
This United Airlines deal was found by Cheapflights users on 8/6. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:49 pmSTL - SIN
1 stop23h 26mUnited Airlines
Wed 9/248:45 amSIN - STL
1 stop21h 08mUnited Airlines
Deal found 8/6$1,095
This United Airlines deal was found by Cheapflights users on 8/6. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/25:49 pmSTL - SIN
1 stop23h 26mUnited Airlines
Tue 9/98:45 amSIN - STL
1 stop21h 08mUnited Airlines
Deal found 8/6$1,110
This United Airlines deal was found by Cheapflights users on 8/6. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:49 pmSTL - SIN
1 stop23h 26mUnited Airlines
Sat 9/278:45 amSIN - STL
1 stop21h 09mUnited Airlines
Deal found 8/6$1,195
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:00 amSTL - SIN
2 stops29h 20mAlaska Airlines
Thu 10/28:05 amSIN - STL
2 stops28h 54mAlaska Airlines
Deal found 8/6$1,214

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Singapore 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 August 7, 2025.
Use the filters below to find and compare flights from St. Louis to Singapore that are best for you.

Fly from

St. Louis

Fly to

Singapore

Route

Depart

Return

Price

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

6:45 am-12:50 am

2 stops29h 05m

Singapore Changi

Tue 9/9

9:45 am-10:50 pm

2 stops26h 05m

$854

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 9/17

7:23 am-5:30 am

2 stops33h 07m

Singapore Changi

Tue 9/23

1:50 am-9:53 pm

2 stops33h 03m

$869

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 9/21

3:56 pm-5:30 am

2 stops48h 34m

Singapore Changi

Sun 9/28

8:05 pm-11:48 pm

2 stops40h 43m

$875

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 1/1

11:14 am-5:40 am

2 stops28h 26m

Singapore Changi

Tue 1/20

8:00 am-10:27 pm

2 stops28h 27m

$1,049

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 9/17

5:49 pm-6:15 am

1 stop23h 26m

Singapore Changi

Wed 9/24

8:45 am-4:53 pm

1 stop21h 08m

$1,095

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

5:49 pm-6:15 am

1 stop23h 26m

Singapore Changi

Tue 9/9

8:45 am-4:53 pm

1 stop21h 08m

$1,110

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 12/19

6:30 am-12:25 am

2 stops27h 55m

$1,272

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 12/19

4:10 pm-5:45 pm

1 stop35h 35m

$2,584

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Best time to book a flight from St. Louis to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore 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 Singapore

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

Currently, October is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $991). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,684). 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 SIN?

Find hourly flight availability from St. Louis to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 7, 2025.

When flying from St. Louis to Singapore, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 10% versus a flight at noon.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. 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 Singapore. Reviews last updated August 7, 2025.
See what other customers who have flown with Japan Airlines, Alaska Airlines, and Cathay Pacific from St. Louis to Singapore have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very good
1,545 reviews
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Alaska Airlines
8.0
Very good
10,000 reviews
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Cathay Pacific
7.6
Good
956 reviews
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
United Airlines
7.4
Good
8,916 reviews
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Air Canada
7.1
Good
9,899 reviews
Japan Airlines
8.3
Very good
1,545 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from St. Louis to Singapore round-trip?

    Cheapflights users have booked flights from St. Louis to Singapore round-trip from $854. Cathay Pacific is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Singapore 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 Singapore?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $991). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,684). 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.

Alternative routes for St. Louis to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Singapore flights
Springfield to Singapore flights

Top airline flying from St. Louis to Singapore

Discover the top airline that operate flights from St. Louis to Singapore. 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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,442FlexibilityNo cancel feeOn-time69%

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