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

Airlines like Cathay Pacific, American Airlines, and United Airlines fly from St. Louis to Singapore in about 25h. The time it takes to get you to your destination can typically vary by up to 8h 40m. The distance between St. Louis and Singapore is about 9513 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

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.

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.

$824+ Flights from St. Louis to Singapore

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Cheap 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 December 15, 2025.

Wed 12/175:30 pmSTL - SIN

1 stop24h 30mUnited Airlines

Sat 12/2010:10 amSIN - STL

1 stop26h 20mUnited Airlines

Deal found 12/13

$1,954

Best flights from St. Louis to Singapore
Discover carefully curated flight deals from St. Louis to Singapore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

Tue 1/276:00 amSTL - SIN

2 stops33h 40mCathay Pacific

Tue 2/38:15 pmSIN - STL

2 stops35h 59mCathay Pacific

Deal found 12/13

$1,003

Fri 1/161:35 pmSTL - SIN

2 stops27h 00mAmerican Airlines

Sat 1/318:15 amSIN - STL

2 stops23h 58mAmerican Airlines

Deal found 12/13

$1,129

Tue 1/275:00 pmSTL - SIN

1 stop25h 00mUnited Airlines

Tue 2/310:10 amSIN - STL

2 stops26h 48mUnited Airlines

Deal found 12/13

$1,129

Sun 2/1510:04 amSTL - SIN

2 stops35h 51mCathay Pacific

Wed 2/181:25 amSIN - STL

2 stops36h 23mCathay Pacific

Deal found 12/12

$1,174

Fri 2/69:57 amSTL - SIN

2 stops32h 03mUnited Airlines

Sun 2/2210:45 amSIN - STL

2 stops48h 20mUnited Airlines

Deal found 12/15

$1,189

Fri 1/166:40 pmSTL - SIN

2 stops35h 35mUnited Airlines

Sat 1/3110:20 pmSIN - STL

1 stop20h 51mUnited Airlines

Deal found 12/13

$1,229

Last-minute flights from St. Louis to Singapore
Discover last-minute flight deals from St. Louis to Singapore. Data last updated December 15, 2025 and is based on user searches.

Wed 12/175:30 pmSTL - SIN

1 stop24h 30mUnited Airlines

Sat 12/2010:10 amSIN - STL

1 stop26h 20mUnited Airlines

Deal found 12/13

$1,954

Sun 1/114:05 pmSTL - SIN

2 stops46h 50mAir Canada

Thu 1/228:50 amSIN - STL

2 stops44h 39mAir Canada

Deal found 12/13

$5,000

Sun 1/113:50 pmSTL - SIN

1 stop35h 05mLufthansa

Wed 1/212:45 amSIN - STL

2 stops30h 42mLufthansa

Deal found 12/13

$5,322

Fri 1/161:35 pmSTL - SIN

2 stops27h 00mAmerican Airlines

Sat 1/318:15 amSIN - STL

2 stops25h 36mAmerican Airlines

Deal found 12/15

$1,129

Fri 1/166:00 pmSTL - SIN

2 stops36h 15mUnited Airlines

Sat 1/3110:20 pmSIN - STL

1 stop20h 51mUnited Airlines

Deal found 12/15

$1,229

Fri 1/162:50 pmSTL - SIN

1 stop36h 55mMultiple Airlines

Sat 1/319:00 amSIN - STL

1 stop42h 54mMultiple Airlines

Deal found 12/13

$2,378

Tue 1/276:00 amSTL - SIN

2 stops33h 40mCathay Pacific

Tue 2/38:15 pmSIN - STL

2 stops35h 59mCathay Pacific

Deal found 12/13

$1,003

Tue 1/273:20 pmSTL - SIN

2 stops27h 25mMultiple Airlines

Tue 2/310:30 pmSIN - STL

3 stops33h 44mMultiple Airlines

Deal found 12/13

$1,357

Tue 1/275:00 pmSTL - SIN

1 stop25h 00mUnited Airlines

Tue 2/310:20 pmSIN - STL

1 stop31h 17mUnited Airlines

Deal found 12/13

$3,041

One-way flights from St. Louis to Singapore
Search for one-way flight options from St. Louis to Singapore. Find affordable one-way fares based on user searches. Data last updated December 15, 2025.

Sun 12/286:00 amSTL - SIN

2 stops36h 00mUnited Airlines

Deal found 12/15

$824

Sat 12/206:35 pmSTL - SIN

2 stops47h 25mUnited Airlines

Deal found 12/15

$1,706

Wed 1/143:50 pmSTL - SIN

3 stops39h 55mMultiple Airlines

Deal found 12/13

$2,127

Sun 12/284:10 pmSTL - SIN

3 stops32h 20mMultiple Airlines

Deal found 12/13

$2,163

Sat 1/171:40 pmSTL - SIN

3 stops53h 55mMultiple Airlines

Deal found 12/15

$2,404

Thu 1/226:10 amSTL - SIN

3 stops48h 15mMultiple Airlines

Deal found 12/13

$2,491

Thu 1/156:10 amSTL - SIN

3 stops50h 05mMultiple Airlines

Deal found 12/13

$2,574

Find flight deals from St. Louis to Singapore

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$1,003 (oojo)
One-way from	$824 (United Airlines)
Popular in	December
Cheapest in	January
Average price	$1,913

Provider with most accurate pricing for Lambert-St Louis-Singapore Changi flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Singapore Changi flights.

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From Lambert-St Louis to Singapore

Search Deals

One-way flight from Lambert-St Louis to Singapore

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($31 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($50 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 1/27

6:00 am-5:40 am

2 stops33h 40m

Singapore Changi

Tue 2/3

8:15 pm-6:14 pm

2 stops35h 59m

$1,003

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

1:35 pm-6:35 am

2 stops27h 00m

Singapore Changi

Sat 1/31

8:15 am-6:13 pm

2 stops23h 58m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 1/27

5:00 pm-8:00 am

1 stop25h 00m

Singapore Changi

Tue 2/3

10:10 am-10:58 pm

2 stops26h 48m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 2/15

10:04 am-11:55 am

2 stops35h 51m

Singapore Changi

Wed 2/18

1:25 am-11:48 pm

2 stops36h 23m

$1,174

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 2/6

9:57 am-8:00 am

2 stops32h 03m

Singapore Changi

Sun 2/22

10:45 am-9:05 pm

2 stops48h 20m

$1,189

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

6:40 pm-8:15 pm

2 stops35h 35m

Singapore Changi

Sat 1/31

10:20 pm-5:11 am

1 stop20h 51m

$1,229

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

6:00 am-8:00 am

2 stops36h 00m

$824

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 1/14

3:50 pm-9:45 pm

3 stops39h 55m

$2,127

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

4:10 pm-2:30 pm

3 stops32h 20m

$2,163

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 1/17

1:40 pm-9:35 am

3 stops53h 55m

$2,404

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 12 results

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 time of day to fly from STL to SG?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Singapore in the evening. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Singapore

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

9,092 reviews

Reviews

1 / 20

10.0

Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

United Airlines

7.4

Good

9,092 reviews

United Airlines

7.4

Good

9,092 reviews

Reviews

1 / 20

10.0

Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

Related info for your journey

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, American Airlines, and United Airlines fly from St. Louis to Singapore in about 25h. The time it takes to get you to your destination can typically vary by up to 8h 40m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Singapore

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,094	Average$1,424	FlexibilityNo cancel fee	On-time69%

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$824+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Singapore with Cheapflights

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Cheap flight deals from St. Louis to Singapore

Cheapest flights from St. Louis to SingaporeExplore 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 December 15, 2025.

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 December 15, 2025.

Find 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 December 15, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Singapore that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Singapore

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 December 15, 2025.

Reviews of airlines servicing Singapore

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.

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?

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

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

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

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

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.

Top airline flying from St. Louis to Singapore

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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 December 15, 2025.