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$1,016+ Cheap flights from St. Louis (STL) to Singapore (SIN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
may. 4 — may. 111
dom. 5/4
dom. 5/11
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 abril 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,016
(Air Canada)

Popular in

August

Cheapest in

November

Average price

$1,406
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
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 29, 2025.

This Air Canada deal was found by Cheapflights users on 4/29. 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.
mar. 9/29:15 amSTL - SIN
2 stops32h 50mAir Canada
mar. 9/169:10 amSIN - STL
2 stops43h 08mAir Canada
Deal found 4/29$1,016
This United Airlines deal was found by Cheapflights users on 4/29. 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.
lun. 9/15:49 pmSTL - SIN
1 stop23h 26mUnited Airlines
mar. 9/168:45 amSIN - STL
1 stop21h 08mUnited Airlines
Deal found 4/29$1,094
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/18:55 amSTL - SIN
2 stops31h 05mDelta
dom. 9/141:10 amSIN - STL
2 stops25h 10mDelta
Deal found 4/29$1,108
This Gurufare deal was found by Cheapflights users on 4/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/116:52 amSTL - SIN
2 stops33h 38mCathay Pacific
mar. 5/201:50 amSIN - STL
2 stops29h 43mCathay Pacific
Deal found 4/28$1,349
This EVA Air deal was found by Cheapflights users on 4/29. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/26:30 pmSTL - SIN
2 stops28h 30mMultiple Airlines
mar. 9/163:10 pmSIN - STL
3 stops37h 34mMultiple Airlines
Deal found 4/29$1,480
This oojo deal was found by Cheapflights users on 4/29. 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.
sáb. 5/246:22 pmSTL - SIN
2 stops41h 13mChina Airlines
sáb. 5/312:00 amSIN - STL
2 stops59h 04mChina Airlines
Deal found 4/29$1,707
This Gurufare deal was found by Cheapflights users on 4/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/127:00 amSTL - SIN
2 stops27h 40mKorean Air
mié. 6/181:10 amSIN - STL
2 stops35h 18mKorean Air
Deal found 4/28$1,806
This AranGrant deal was found by Cheapflights users on 4/29. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/97:30 amSTL - SIN
2 stops33h 40mJapan Airlines
mar. 9/239:50 pmSIN - STL
2 stops27h 58mJapan Airlines
Deal found 4/29$1,928
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/193:42 pmSTL - SIN
2 stops34h 48mKLM
vie. 7/412:40 amSIN - STL
2 stops28h 52mKLM
Deal found 4/28$2,146
This Ovago deal was found by Cheapflights users on 4/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/23:30 pmSTL - SIN
1 stop35h 55mLufthansa
mar. 7/1512:05 amSIN - STL
2 stops28h 42mLufthansa
Deal found 4/29$2,438
This Emirates deal was found by Cheapflights users on 4/28. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/123:35 pmSTL - SIN
2 stops41h 10mEmirates
mié. 6/181:40 amSIN - STL
2 stops33h 35mEmirates
Deal found 4/28$4,967
This Air France deal was found by Cheapflights users on 4/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/76:04 pmSTL - SIN
2 stops33h 26mAir France
sáb. 8/1610:30 pmSIN - STL
2 stops30h 28mAir France
Deal found 4/28$9,608

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 abril 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

mar. 9/2

9:15 am-7:05 am

2 stops32h 50m

Singapore Changi

mar. 9/16

9:10 am-3:18 pm

2 stops43h 08m

$1,016

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lun. 9/1

5:49 pm-6:15 am

1 stop23h 26m

Singapore Changi

mar. 9/16

8:45 am-4:53 pm

1 stop21h 08m

$1,094

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lun. 9/1

8:55 am-5:00 am

2 stops31h 05m

Singapore Changi

dom. 9/14

1:10 am-1:20 pm

2 stops25h 10m

$1,108

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

dom. 5/11

6:52 am-5:30 am

2 stops33h 38m

Singapore Changi

mar. 5/20

1:50 am-6:33 pm

2 stops29h 43m

$1,349

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mar. 9/2

6:30 pm-12:00 pm

2 stops28h 30m

Singapore Changi

mar. 9/16

3:10 pm-3:44 pm

3 stops37h 34m

$1,480

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

sáb. 5/24

6:22 pm-12:35 am

2 stops41h 13m

Singapore Changi

sáb. 5/31

2:00 am-12:04 am

2 stops59h 04m

$1,707

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

jue. 6/12

7:00 am-11:40 pm

2 stops27h 40m

Singapore Changi

mié. 6/18

1:10 am-11:28 pm

2 stops35h 18m

$1,806

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mar. 9/9

7:30 am-6:10 am

2 stops33h 40m

Singapore Changi

mar. 9/23

9:50 pm-12:48 pm

2 stops27h 58m

$1,928

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

jue. 6/19

3:42 pm-3:30 pm

2 stops34h 48m

Singapore Changi

vie. 7/4

12:40 am-4:32 pm

2 stops28h 52m

$2,146

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mié. 7/2

3:30 pm-4:25 pm

1 stop35h 55m

Singapore Changi

mar. 7/15

12:05 am-3:47 pm

2 stops28h 42m

$2,438

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 13 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on St. Louis-Singapore flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 $1,011). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,684). 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 abril 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.

Rainfall in Singapore by month

Plan your trip to Singapore by taking into account the average rainfall totals by month.

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.

Temperature in Singapore by month

Plan your trip to Singapore by taking into account the average temperature totals by month.

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).

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 abril 29, 2025.
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,066 reviews
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,459 reviews
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
China Airlines
8.3
Very good
732 reviews
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Emirates
8.0
Very good
3,213 reviews
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,929 reviews
Korean Air
8.4
Very good
1,066 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 are the cheapest airlines flying from St. Louis to Singapore round-trip?

    Cheapflights users have booked flights from St. Louis to Singapore round-trip from $1,016. Other airlines that can offer you cheap pricing are United Airlines, from $1,094, and Delta, from $1,108. Air Canada is 32% 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 $1,011). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,684). 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.
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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,454FlexibilityNo cancel feeOn-time69%

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