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$764+ Cheap flights from St. Louis (STL) to Singapore (SIN)

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.
STL — SIN
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,028
(Cathay Pacific)

One-way from

$764
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,394
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 Changi
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One-way flight from Lambert-St Louis to Singapore Changi
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Highest demand for flights based on searches. 4% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($34 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 29, 2025.

This Cathay Pacific deal was found by Cheapflights users on 9/27. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:59 pmSTL - SIN
2 stops29h 56mMultiple Airlines
Sun 11/161:25 amSIN - STL
2 stops36h 17mMultiple Airlines
Deal found 9/27$1,028
This Flysmarter deal was found by Cheapflights users on 9/27. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:41 pmSTL - SIN
2 stops27h 14mCathay Pacific
Mon 11/107:40 amSIN - STL
2 stops29h 18mCathay Pacific
Deal found 9/27$1,039
This Cathay Pacific deal was found by Cheapflights users on 9/27. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:39 amSTL - SIN
2 stops41h 26mMultiple Airlines
Sun 11/91:25 amSIN - STL
2 stops36h 17mMultiple Airlines
Deal found 9/27$1,042
This Cathay Pacific deal was found by Cheapflights users on 9/28. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:39 amSTL - SIN
2 stops33h 51mMultiple Airlines
Sun 10/198:05 pmSIN - STL
2 stops40h 00mMultiple Airlines
Deal found 9/28$1,047
This United Airlines deal was found by Cheapflights users on 9/27. 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 10/275:29 pmSTL - SIN
1 stop24h 31mUnited Airlines
Mon 11/1010:10 amSIN - STL
1 stop20h 17mUnited Airlines
Deal found 9/27$1,113
This United Airlines deal was found by Cheapflights users on 9/28. 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 11/125:29 pmSTL - SIN
1 stop24h 31mUnited Airlines
Wed 11/1910:10 amSIN - STL
1 stop20h 17mUnited Airlines
Deal found 9/28$1,124
This United Airlines deal was found by Cheapflights users on 9/27. 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 11/1012:31 pmSTL - SIN
2 stops29h 29mUnited Airlines
Mon 11/1710:10 amSIN - STL
1 stop20h 17mUnited Airlines
Deal found 9/27$1,129
This oojo deal was found by Cheapflights users on 9/28. 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
Sat 10/181:50 amSIN - STL
2 stops31h 36mCathay Pacific
Deal found 9/28$1,274
This United Airlines deal was found by Cheapflights users on 9/28. 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 10/115:35 pmSTL - SIN
1 stop23h 40mUnited Airlines
Tue 10/148:45 amSIN - STL
1 stop21h 09mUnited Airlines
Deal found 9/28$1,365

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 29, 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

Mon 11/10

5:58 pm-11:55 am

2 stops27h 57m

Singapore Changi

Mon 11/17

8:15 pm-4:47 pm

2 stops34h 32m

$1,028

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 11/12

7:00 am-12:25 am

2 stops27h 25m

Singapore Changi

Tue 11/18

1:25 am-4:47 pm

2 stops29h 22m

$1,028

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

7:41 pm-11:55 am

2 stops27h 14m

Singapore Changi

Mon 11/10

7:40 am-10:58 pm

2 stops29h 18m

$1,039

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 10/14

6:39 am-5:30 am

2 stops33h 51m

Singapore Changi

Sun 10/19

8:05 pm-11:05 pm

2 stops40h 00m

$1,047

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

5:29 pm-7:00 am

1 stop24h 31m

Singapore Changi

Mon 11/10

10:10 am-4:27 pm

1 stop20h 17m

$1,113

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

5:54 pm-11:55 am

2 stops28h 01m

Singapore Changi

Fri 1/30

1:25 am-9:04 pm

2 stops33h 39m

$1,128

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

9:55 am-8:15 pm

2 stops44h 20m

$764

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

6:44 pm-9:15 pm

2 stops36h 31m

$877

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 12/20

5:26 pm-2:55 pm

2 stops55h 29m

$1,536

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 12/20

7:00 am-5:35 pm

2 stops44h 35m

$1,645

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 13 results
1
2

Compare providers for flights from St. Louis to Singapore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Singapore in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Singapore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Singapore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Singapore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Singapore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Singapore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, September is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $982). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,658). 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 September 29, 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 September 29, 2025.
See what other customers who have flown with United Airlines 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.
United Airlines
7.4
Good
8,924 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

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.

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

    Airlines like Cathay Pacific fly from St. Louis to Singapore in about 27h 14m. The time it takes to get you to your destination can typically vary by up to . The distance between St. Louis and Singapore is about 9513 mi.

  • 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 $1,094. United Airlines is 25% 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, September is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $982). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,658). 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

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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.
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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,436FlexibilityNo cancel feeOn-time69%

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