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$668+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,102
(United)

One-way from

$668
(Priceline)

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
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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. 1% potential increase in price ($29 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 April 15, 2025.

This Air Canada deal was found by Cheapflights users on 4/15. 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.
Tue 9/29:15 amSTL - SIN
2 stops32h 50mAir Canada
Wed 9/178:10 amSIN - STL
2 stops48h 47mAir Canada
Deal found 4/15$1,015
This United Airlines deal was found by Cheapflights users on 4/15. 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 9/25:45 pmSTL - SIN
1 stop23h 30mUnited Airlines
Wed 9/178:45 amSIN - STL
1 stop21h 01mUnited Airlines
Deal found 4/15$1,093
This Booking.com deal was found by Cheapflights users on 4/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/25:30 amSTL - SIN
2 stops36h 35mMultiple Airlines
Tue 9/162:15 amSIN - STL
3 stops50h 01mMultiple Airlines
Deal found 4/15$1,122
This Gurufare deal was found by Cheapflights users on 4/15. 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.
Tue 9/27:23 amSTL - SIN
2 stops27h 57mJapan Airlines
Tue 9/161:55 amSIN - STL
2 stops34h 04mJapan Airlines
Deal found 4/15$1,185
This Gurufare deal was found by Cheapflights users on 4/14. 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.
Tue 7/226:15 amSTL - SIN
2 stops35h 25mANA
Tue 8/1210:10 pmSIN - STL
2 stops31h 49mANA
Deal found 4/14$1,292
This oojo deal was found by Cheapflights users on 4/14. 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.
Sun 5/116:52 amSTL - SIN
2 stops33h 38mCathay Pacific
Tue 5/201:50 amSIN - STL
2 stops34h 14mCathay Pacific
Deal found 4/14$1,373
This Ovago deal was found by Cheapflights users on 4/14. 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.
Wed 7/24:23 pmSTL - SIN
2 stops37h 02mFinnair
Wed 7/169:35 pmSIN - STL
2 stops33h 58mFinnair
Deal found 4/14$1,406
This oojo deal was found by Cheapflights users on 4/14. 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 7/297:32 pmSTL - SIN
2 stops28h 03mChina Airlines
Wed 8/132:00 amSIN - STL
2 stops58h 59mChina Airlines
Deal found 4/14$1,518
This Delta deal was found by Cheapflights users on 4/14. 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.
Wed 7/238:55 amSTL - SIN
2 stops25h 45mDelta
Sat 8/97:30 amSIN - STL
2 stops37h 36mDelta
Deal found 4/14$1,580
This oojo deal was found by Cheapflights users on 4/14. 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.
Wed 12/177:00 amSTL - SIN
2 stops35h 45mQatar Airways
Wed 12/312:00 amSIN - STL
2 stops35h 56mQatar Airways
Deal found 4/14$1,821
This Lufthansa deal was found by Cheapflights users on 4/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/303:30 pmSTL - SIN
1 stop35h 35mLufthansa
Thu 6/512:05 amSIN - STL
2 stops26h 25mLufthansa
Deal found 4/15$3,809
This oojo deal was found by Cheapflights users on 4/14. 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.
Sat 5/241:38 pmSTL - SIN
3 stops41h 47mBritish Airways
Sun 6/111:20 pmSIN - STL
2 stops32h 13mBritish Airways
Deal found 4/14$11,590

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 April 15, 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

Tue 9/2

9:15 am-7:05 am

2 stops32h 50m

Singapore Changi

Wed 9/17

8:10 am-7:57 pm

2 stops48h 47m

$1,015

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

5:30 am-6:25 pm

2 stops23h 55m

Singapore Changi

Wed 9/17

8:45 am-4:46 pm

1 stop21h 01m

$1,093

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

5:30 am-7:05 am

2 stops36h 35m

Singapore Changi

Tue 9/16

2:15 am-3:16 pm

3 stops50h 01m

$1,122

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

7:23 am-12:20 am

2 stops27h 57m

Singapore Changi

Tue 9/16

1:55 am-10:59 pm

2 stops34h 04m

$1,185

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 7/22

6:15 am-6:40 am

2 stops35h 25m

Singapore Changi

Tue 8/12

10:10 pm-4:59 pm

2 stops31h 49m

$1,292

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

6:52 am-5:30 am

2 stops33h 38m

Singapore Changi

Tue 5/20

1:50 am-11:04 pm

2 stops34h 14m

$1,373

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 7/2

4:23 pm-6:25 pm

2 stops37h 02m

Singapore Changi

Wed 7/16

9:35 pm-6:33 pm

2 stops33h 58m

$1,406

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 7/29

7:32 pm-12:35 pm

2 stops28h 03m

Singapore Changi

Wed 8/13

2:00 am-11:59 pm

2 stops58h 59m

$1,518

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 7/23

8:55 am-11:40 pm

2 stops25h 45m

Singapore Changi

Sat 8/9

7:30 am-8:06 am

2 stops37h 36m

$1,580

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 7/2

6:41 am-9:00 am

2 stops37h 19m

Singapore Changi

Tue 7/15

3:10 am-10:57 pm

2 stops32h 47m

$1,861

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

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 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 April 15, 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 April 15, 2025.
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
China Airlines
8.2
Very good
729 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Finnair
7.6
Good
1,269 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Cathay Pacific
7.5
Good
846 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qatar Airways
7.4
Good
3,551 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Comfort

8.2

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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 $1,102. Other airlines that can offer you cheap pricing are Air Canada, from $1,151, and Cathay Pacific, from $1,373. United Airlines is 27% 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

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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,453FlexibilityNo cancel feeOn-time69%

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