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$1,068+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 julio 29, 2025.

Round-trip from

$1,068
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$1,423
From Lambert-St Louis to Singapore Changi
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Highest demand for flights based on searches. 7% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 29, 2025.

This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/81:30 pmSTL - SIN
2 stops52h 35mAir Canada
lun. 9/156:15 amSIN - STL
2 stops26h 42mAir Canada
Deal found 7/27$1,068
This Orbitz deal was found by Cheapflights users on 7/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/257:00 amSTL - SIN
2 stops27h 55mMultiple Airlines
vie. 11/2810:00 amSIN - STL
2 stops23h 39mMultiple Airlines
Deal found 7/27$1,097
This United Airlines deal was found by Cheapflights users on 7/27. 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.
lun. 9/85:49 pmSTL - SIN
1 stop23h 26mUnited Airlines
lun. 9/1511:05 amSIN - STL
2 stops44h 54mUnited Airlines
Deal found 7/27$1,105
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/86:05 amSTL - SIN
2 stops29h 15mAmerican Airlines
dom. 9/141:55 amSIN - STL
2 stops24h 28mAmerican Airlines
Deal found 7/27$1,248
This Japan Airlines deal was found by Cheapflights users on 7/28. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/297:23 amSTL - SIN
2 stops27h 57mJapan Airlines
mié. 10/11:55 amSIN - STL
2 stops24h 28mJapan Airlines
Deal found 7/28$1,354
This Ovago deal was found by Cheapflights users on 7/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/256:13 pmSTL - SIN
2 stops30h 42mQatar Airways
jue. 11/272:00 amSIN - STL
2 stops35h 54mQatar Airways
Deal found 7/27$1,498
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/311:18 amSTL - SIN
2 stops28h 42mKorean Air
jue. 8/141:10 amSIN - STL
2 stops35h 12mKorean Air
Deal found 7/28$1,902
This Finnair deal was found by Cheapflights users on 7/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/34:52 pmSTL - SIN
2 stops36h 33mFinnair
dom. 8/179:35 pmSIN - STL
2 stops39h 24mFinnair
Deal found 7/28$1,998
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/25:30 pmSTL - SIN
2 stops32h 35mCathay Pacific
vie. 9/1912:45 pmSIN - STL
2 stops44h 47mCathay Pacific
Deal found 7/27$2,401
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/16:00 amSTL - SIN
2 stops28h 40mDelta
jue. 8/141:10 amSIN - STL
2 stops35h 04mDelta
Deal found 7/28$2,636

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 julio 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

lun. 9/8

1:30 pm-7:05 am

2 stops52h 35m

Singapore Changi

lun. 9/15

6:15 am-7:57 pm

2 stops26h 42m

$1,068

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mar. 11/25

7:00 am-12:55 am

2 stops27h 55m

Singapore Changi

vie. 11/28

10:00 am-7:39 pm

2 stops23h 39m

$1,097

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lun. 9/8

5:49 pm-6:15 am

1 stop23h 26m

Singapore Changi

lun. 9/15

11:05 am-6:59 pm

2 stops44h 54m

$1,105

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

lun. 9/8

6:05 am-12:20 am

2 stops29h 15m

Singapore Changi

dom. 9/14

1:55 am-1:23 pm

2 stops24h 28m

$1,248

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

vie. 1/16

3:36 pm-6:40 am

2 stops25h 04m

Singapore Changi

vie. 1/30

2:20 am-1:47 pm

2 stops25h 27m

$1,324

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

jue. 1/1

11:14 am-5:40 am

2 stops28h 26m

Singapore Changi

lun. 1/19

1:25 am-10:27 pm

2 stops35h 02m

$1,368

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

mar. 11/25

6:13 pm-2:55 pm

2 stops30h 42m

Singapore Changi

jue. 11/27

2:00 am-11:54 pm

2 stops35h 54m

$1,498

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

vie. 1/16

3:50 pm-5:00 pm

1 stop35h 10m

Singapore Changi

sáb. 1/31

11:05 am-1:55 pm

1 stop40h 50m

$1,689

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

dom. 9/21

3:30 pm-3:45 pm

3 stops59h 15m

$2,426

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

jue. 12/18

6:30 am-5:25 pm

2 stops44h 55m

$2,772

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 11 results
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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, October is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $995). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,679). 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 julio 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 julio 29, 2025.
See what other customers who have flown with Japan Airlines, Cathay Pacific, and Qatar Airways 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.
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very good
1,535 reviews
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Cathay Pacific
7.6
Good
948 reviews
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Qatar Airways
7.4
Good
3,609 reviews
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
United Airlines
7.4
Good
8,899 reviews
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
American Airlines
7.2
Good
10,000 reviews
Japan Airlines
8.3
Very good
1,535 reviews

Comfort

8.2

Entertainment

7.8

Boarding

8.4

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

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 $1,068. Other airlines that can offer you cheap pricing are United Airlines, from $1,105, and American Airlines, from $1,248. Air Canada 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, October is the cheapest month in which you can book a flight from St. Louis to Singapore (average of $995). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,679). 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,442FlexibilityNo cancel feeOn-time69%

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