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$549+ Cheap flights from St. Louis (STL) to Singapore

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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from St. Louis to Singapore

Keep the following information in mind while searching for St. Louis to Singapore flight deals. Data was last updated September 11, 2025.

Round-trip from

$1,046
(Orbitz)

One-way from

$549
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,372
From Lambert-St Louis to Singapore
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One-way flight from Lambert-St Louis to Singapore
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Highest demand for flights based on searches. 4% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/141:30 pmSTL - SIN
2 stops28h 35mAir Canada
Tue 10/219:10 amSIN - STL
2 stops43h 08mAir Canada
Deal found 9/10$1,061
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:05 pmSTL - SIN
2 stops50h 00mAir Canada
Sun 10/199:10 amSIN - STL
2 stops43h 08mAir Canada
Deal found 9/10$1,067
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:39 amSTL - SIN
2 stops27h 41mMultiple Airlines
Sun 10/198:00 pmSIN - STL
2 stops40h 05mMultiple Airlines
Deal found 9/10$1,068
This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:39 amSTL - SIN
2 stops47h 16mMultiple Airlines
Sun 10/198:00 pmSIN - STL
2 stops40h 05mMultiple Airlines
Deal found 9/11$1,082
This oojo deal was found by Cheapflights users on 9/10. 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.
Tue 10/146:39 amSTL - SIN
2 stops29h 11mCathay Pacific
Mon 10/201:50 amSIN - STL
2 stops35h 04mCathay Pacific
Deal found 9/10$1,084
This oojo deal was found by Cheapflights users on 9/11. 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 10/267:54 pmSTL - SIN
2 stops44h 46mCathay Pacific
Sun 11/26:00 pmSIN - STL
2 stops42h 58mCathay Pacific
Deal found 9/11$1,090
This Trip.com deal was found by Cheapflights users on 9/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/34:43 pmSTL - SIN
2 stops25h 17mUnited Airlines
Mon 11/1710:20 pmSIN - STL
2 stops26h 31mUnited Airlines
Deal found 9/9$1,111
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/141:40 pmSTL - SIN
2 stops27h 35mUnited Airlines
Tue 10/218:45 amSIN - STL
1 stop21h 09mUnited Airlines
Deal found 9/10$1,125
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 10/95:15 amSTL - SIN
2 stops24h 10mUnited Airlines
Thu 10/168:40 pmSIN - STL
2 stops26h 12mUnited Airlines
Deal found 9/9$1,129
This oojo deal was found by Cheapflights users on 9/10. 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 10/156:39 amSTL - SIN
2 stops29h 11mCathay Pacific
Sat 10/181:50 amSIN - STL
2 stops35h 04mCathay Pacific
Deal found 9/10$1,134
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 11/105:29 pmSTL - SIN
1 stop24h 31mUnited Airlines
Sun 11/1610:45 amSIN - STL
2 stops49h 37mUnited Airlines
Deal found 9/10$1,141

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 September 11, 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

Thu 1/1

6:20 am-11:55 am

2 stops39h 35m

Singapore Changi

Tue 1/20

10:00 am-9:04 pm

2 stops49h 04m

$1,083

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

11:18 am-5:40 am

2 stops29h 22m

Singapore Changi

Thu 3/26

8:00 am-11:09 pm

2 stops28h 09m

$1,102

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

2:55 pm-5:45 pm

1 stop37h 50m

Singapore Changi

Thu 3/26

9:00 am-11:55 pm

1 stop27h 55m

$1,105

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 11/3

4:43 pm-8:00 am

2 stops25h 17m

Singapore Changi

Mon 11/17

10:20 pm-10:51 am

2 stops26h 31m

$1,111

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 2/17

9:00 am-8:00 am

1 stop33h 00m

Singapore Changi

Tue 2/24

10:20 pm-3:21 pm

2 stops31h 01m

$1,125

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 10/14

1:40 pm-6:15 am

2 stops27h 35m

Singapore Changi

Tue 10/21

8:45 am-4:54 pm

1 stop21h 09m

$1,125

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

7:05 am-8:15 pm

1 stop24h 10m

Singapore Changi

Thu 3/26

10:20 pm-12:20 pm

2 stops27h 00m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 10/9

5:15 am-6:25 pm

2 stops24h 10m

Singapore Changi

Thu 10/16

8:40 pm-9:52 am

2 stops26h 12m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/2

6:20 am-11:55 am

2 stops39h 35m

Singapore Changi

Tue 1/20

6:00 pm-9:04 pm

2 stops41h 04m

$1,133

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 11/20

7:00 am-5:10 pm

2 stops44h 10m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 16 results
1
2

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 $1,002). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,665). 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 SG?

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 September 11, 2025.

When flying from St. Louis to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.
Read through reviews of airlines operating flights from St. Louis to Singapore, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 airport do you fly from for flights from St. Louis to Singapore?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Singapore. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

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

    Airlines like Cathay Pacific and United Airlines fly from St. Louis to Singapore in about 25h 17m. The time it takes to get you to your destination can typically vary by up to 14h 18m. The distance between St. Louis and Singapore is about 9513 mi. This flight may include one or multiple stops.

  • 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 $1,002). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,665). 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

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Alternative routes for St. Louis to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,095Average$1,456FlexibilityNo cancel feeOn-time69%

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