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$434+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
jan 25 — feb 11
sön 1/25
sön 2/1
1 adult, Economy
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Cheap flight deals from St. Louis to Singapore

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 26, 2025.

This United Airlines deal was found by Cheapflights users on 12/26. 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.
mån 2/95:00 pmSTL - SIN
1 stop25h 00mUnited Airlines
mån 2/1610:10 amSIN - STL
2 stops26h 07mUnited Airlines
Deal found 12/26$1,130
This FlightHub deal was found by Cheapflights users on 12/25. 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.
lör 2/212:26 pmSTL - SIN
2 stops34h 29mQatar Airways
fre 2/278:15 pmSIN - STL
2 stops35h 47mQatar Airways
Deal found 12/25$1,181
This Kiwi.com deal was found by Cheapflights users on 12/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lör 2/212:47 pmSTL - SIN
1 stop36h 58mMultiple Airlines
fre 2/279:00 amSIN - STL
1 stop28h 59mMultiple Airlines
Deal found 12/25$1,880
This United Airlines deal was found by Cheapflights users on 12/26. 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.
lör 1/314:49 pmSTL - SIN
2 stops37h 26mUnited Airlines
ons 2/1810:10 amSIN - STL
3 stops26h 04mUnited Airlines
Deal found 12/26$1,180
This United Airlines deal was found by Cheapflights users on 12/24. 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.
mån 4/207:05 pmSTL - SIN
1 stop22h 40mUnited Airlines
tors 4/239:00 amSIN - STL
1 stop22h 24mUnited Airlines
Deal found 12/24$1,316
This United Airlines deal was found by Cheapflights users on 12/25. 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.
fre 1/166:45 amSTL - SIN
2 stops28h 10mUnited Airlines
lör 1/3110:20 pmSIN - STL
1 stop20h 51mUnited Airlines
Deal found 12/25$1,333
This Air Canada deal was found by Cheapflights users on 12/25. 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.
lör 1/244:05 pmSTL - SIN
2 stops46h 50mAir Canada
ons 2/410:20 pmSIN - STL
2 stops55h 09mAir Canada
Deal found 12/25$4,569
This United Airlines deal was found by Cheapflights users on 12/25. 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.
lör 2/219:55 amSTL - SIN
2 stops44h 20mUnited Airlines
fre 2/2710:10 amSIN - STL
3 stops26h 04mUnited Airlines
Deal found 12/25$3,346
This Orbitz deal was found by Cheapflights users on 12/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 2/137:00 amSTL - SIN
2 stops36h 35mMultiple Airlines
fre 2/2010:35 amSIN - STL
2 stops41h 16mMultiple Airlines
Deal found 12/25$4,777

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 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$993
(oojo)

One-way from

$434
(Expedia)

Popular in

December

Cheapest in

January

Average price

$1,913
Provider with most accurate pricing for Lambert-St Louis-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Singapore Changi flights.
Search Deals
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

 
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 december 26, 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

mån 2/9

5:00 pm-8:00 am

1 stop25h 00m

Singapore Changi

mån 2/16

10:10 am-10:17 pm

2 stops26h 07m

$1,130

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lör 1/31

4:49 pm-8:15 pm

2 stops37h 26m

Singapore Changi

ons 2/18

10:10 am-10:14 pm

3 stops26h 04m

$1,180

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lör 2/21

2:26 pm-2:55 pm

2 stops34h 29m

Singapore Changi

fre 2/27

8:15 pm-6:02 pm

2 stops35h 47m

$1,181

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mån 4/20

7:05 pm-6:45 am

1 stop22h 40m

Singapore Changi

tors 4/23

9:00 am-6:24 pm

1 stop22h 24m

$1,316

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

fre 1/16

6:45 am-12:55 am

2 stops28h 10m

Singapore Changi

lör 1/31

10:20 pm-5:11 am

1 stop20h 51m

$1,333

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lör 2/21

2:47 pm-5:45 pm

1 stop36h 58m

Singapore Changi

fre 2/27

9:00 am-11:59 pm

1 stop28h 59m

$1,880

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lör 2/21

9:55 am-8:15 pm

2 stops44h 20m

Singapore Changi

fre 2/27

10:10 am-10:14 pm

3 stops26h 04m

$3,346

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lör 1/24

4:05 pm-4:55 am

2 stops46h 50m

Singapore Changi

ons 2/4

10:20 pm-3:29 pm

2 stops55h 09m

$4,569

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

fre 2/13

7:00 am-9:35 am

2 stops36h 35m

Singapore Changi

fre 2/20

10:35 am-1:51 pm

2 stops41h 16m

$4,777

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

ons 3/11

7:00 am-1:00 pm

2 stops41h 00m

$434

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 18 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 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 26, 2025.

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

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 december 26, 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
9,116 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,116 reviews
United Airlines
7.4
Good
9,116 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 United Airlines and Qatar Airways 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 9h 29m. 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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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 december 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,453FlexibilityNo cancel feeOn-time69%

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