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$434+ 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 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
Sun 1/25
Sun 2/1
1 adult, Economy
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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 26, 2025.

This oojo deal was found by Cheapflights users on 12/23. 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 12/301:54 pmSTL - SIN
2 stops56h 01mCathay Pacific
Tue 1/62:05 pmSIN - STL
2 stops42h 09mCathay Pacific
Deal found 12/23$2,264
This Mytrip deal was found by Cheapflights users on 12/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:30 amSTL - SIN
3 stops34h 30mMultiple Airlines
Tue 1/68:15 pmSIN - STL
3 stops33h 14mMultiple Airlines
Deal found 12/23$2,563
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/306:41 amSTL - SIN
1 stop23h 34mUnited Airlines
Tue 1/610:20 pmSIN - STL
2 stops28h 09mUnited Airlines
Deal found 12/23$3,028

Find 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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$977
(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.
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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
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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

Thu 1/22

6:00 am-5:40 am

2 stops33h 40m

Singapore Changi

Wed 1/28

1:25 am-6:14 pm

2 stops30h 49m

$977

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 1/29

7:04 am-2:55 pm

2 stops41h 51m

Singapore Changi

Mon 2/2

2:05 pm-11:59 pm

2 stops23h 54m

$1,124

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

5:15 am-8:15 pm

2 stops26h 00m

Singapore Changi

Mon 3/16

10:10 am-10:25 pm

1 stop25h 15m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

11:05 am-6:35 am

2 stops29h 30m

Singapore Changi

Sat 1/31

8:15 am-6:13 pm

2 stops23h 58m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 3/8

5:55 pm-8:15 pm

2 stops37h 20m

Singapore Changi

Mon 3/16

10:10 am-10:25 pm

1 stop25h 15m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

6:32 am-5:00 am

2 stops33h 28m

Singapore Changi

Sun 3/15

10:30 pm-11:15 pm

2 stops37h 45m

$1,138

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 3/7

10:04 am-11:55 am

2 stops35h 51m

Singapore Changi

Mon 3/16

8:15 pm-6:01 pm

2 stops34h 46m

$1,174

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 3/7

6:51 am-8:15 pm

1 stop23h 24m

Singapore Changi

Mon 3/16

10:10 am-10:25 pm

1 stop25h 15m

$1,175

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 3/6

6:05 pm-8:15 pm

2 stops36h 10m

Singapore Changi

Mon 3/16

10:10 am-10:25 pm

1 stop25h 15m

$1,179

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/9

5:15 am-8:15 pm

2 stops26h 00m

Singapore Changi

Sat 3/21

10:20 pm-1:19 pm

2 stops27h 59m

$1,179

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Showing 1-10 of 15 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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Singapore flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 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 December 26, 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 9% 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 December 26, 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
9,115 reviews

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
9,115 reviews
United Airlines
7.4
Good
9,115 reviews

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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.

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

    Airlines like Cathay Pacific, United Airlines, and American Airlines fly from St. Louis to Singapore in about 26h. The time it takes to get you to your destination can typically vary by up to 7h 40m. The distance between St. Louis and Singapore is about 9513 mi. This flight may include one or multiple stops.

  • 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 23% 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.

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.
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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,453FlexibilityNo cancel feeOn-time69%

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