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Cheap flights from St. Louis to Singapore from S$ 1,125

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 28-12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
12 Oct — 19 Oct1
1 adult
1 adult, Economy

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 12 September 2025.

Round-trip from

S$ 1,348

One-way from

S$ 1,125

Popular in

December

Cheapest in

February

Average price

S$ 1,760
7-2-13-2
  • 7-2-13-2
  • 2 total stops
  • 65h 46m total
  • St. Louis to Singapore
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Qatar Airways
  • Qatar Airways
  • 28-12
  • 2 total stops
  • 33h 25m total
  • St. Louis to Singapore
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Highest demand for flights based on searches. 4% potential increase in price (S$ 118 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (S$ 59 potential savings vs. average return 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 12 September 2025.

Tue 14-1013:30STL - SIN
2 stops28h 35mAir Canada
Tue 21-1009:10SIN - STL
2 stops43h 08mAir Canada
Deal found 10-9S$ 1,361
Wed 15-1016:05STL - SIN
2 stops50h 00mAir Canada
Sun 19-1009:10SIN - STL
2 stops43h 08mAir Canada
Deal found 10-9S$ 1,369
Tue 14-1006:39STL - SIN
2 stops27h 41mMultiple Airlines
Sun 19-1020:00SIN - STL
2 stops40h 05mMultiple Airlines
Deal found 10-9S$ 1,370
Thu 16-1006:39STL - SIN
2 stops47h 16mMultiple Airlines
Sun 19-1020:00SIN - STL
2 stops40h 05mMultiple Airlines
Deal found 11-9S$ 1,388
Tue 14-1006:39STL - SIN
2 stops29h 11mCathay Pacific
Mon 20-1001:50SIN - STL
2 stops35h 04mCathay Pacific
Deal found 10-9S$ 1,390
Sun 26-1019:54STL - SIN
2 stops44h 46mCathay Pacific
Sun 2-1118:00SIN - STL
2 stops42h 58mCathay Pacific
Deal found 11-9S$ 1,398
Tue 14-1013:40STL - SIN
2 stops27h 35mUnited Airlines
Tue 21-1008:45SIN - STL
1 stop21h 09mUnited Airlines
Deal found 10-9S$ 1,443
Mon 27-1013:35STL - SIN
2 stops28h 25mUnited Airlines
Mon 3-1122:20SIN - STL
2 stops26h 31mUnited Airlines
Deal found 12-9S$ 1,448
Wed 15-1006:39STL - SIN
2 stops29h 11mCathay Pacific
Sat 18-1001:50SIN - STL
2 stops35h 04mCathay Pacific
Deal found 10-9S$ 1,455
Mon 10-1117:29STL - SIN
1 stop24h 31mUnited Airlines
Sun 16-1110:45SIN - STL
2 stops49h 37mUnited Airlines
Deal found 10-9S$ 1,464
Tue 14-1017:09STL - SIN
2 stops32h 56mCathay Pacific
Sat 18-1001:50SIN - STL
2 stops35h 04mCathay Pacific
Deal found 10-9S$ 1,474
Mon 10-1116:14STL - SIN
2 stops39h 41mMultiple Airlines
Sat 15-1123:10SIN - STL
2 stops38h 49mMultiple Airlines
Deal found 10-9S$ 1,512

Cheapflights Fare Finder

 
Customise 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 200,618 searches. Data last updated 12 September 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 1-1

06:20-11:55

2 stops39h 35m

Singapore Changi

Tue 20-1

10:00-21:04

2 stops49h 04m

S$ 1,389

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 9-3

11:18-05:40

2 stops29h 22m

Singapore Changi

Thu 26-3

08:00-23:09

2 stops28h 09m

S$ 1,413

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 9-3

14:55-17:45

1 stop37h 50m

Singapore Changi

Thu 26-3

09:00-23:55

1 stop27h 55m

S$ 1,417

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 14-10

13:40-06:15

2 stops27h 35m

Singapore Changi

Tue 21-10

08:45-16:54

1 stop21h 09m

S$ 1,443

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 9-3

07:05-20:15

1 stop24h 10m

Singapore Changi

Thu 26-3

22:20-12:20

2 stops27h 00m

S$ 1,448

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 16-1

07:09-00:50

2 stops27h 41m

Singapore Changi

Sat 31-1

08:15-22:27

2 stops28h 12m

S$ 1,453

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 2-1

06:20-11:55

2 stops39h 35m

Singapore Changi

Tue 20-1

18:00-21:04

2 stops41h 04m

S$ 1,453

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 26-10

17:29-07:00

1 stop24h 31m

Singapore Changi

Sun 2-11

10:10-17:27

1 stop20h 17m

S$ 1,571

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 30-11

17:29-08:00

1 stop24h 31m

Singapore Changi

Sun 7-12

22:20-12:15

2 stops27h 55m

S$ 1,576

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 28-12

15:30-14:55

2 stops33h 25m

S$ 1,125

Flights are sorted by cheapest return flights first.

Deals found on 10-9

Showing 1-10 of 16 results
1
2

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 return 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.

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 and United Airlines fly from St. Louis to Singapore in about 27h 35m. The time it takes to get you to your destination can typically vary by up to 12h. The distance between St. Louis and Singapore is about 15310 km. This flight may include one or multiple stops.

  • 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 holiday 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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How does Cheapflights help users find flights from St. Louis to Singapore?

Cheapflights helps you search for flights from St. Louis to Singapore via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Singapore?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from St. Louis to Singapore for you. Better yet — we are completely free to use.

Can Cheapflights find flights from St. Louis to Singapore with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Singapore, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from St. Louis to Singapore become cheaper?

Of course! You can now track prices for flights from St. Louis to Singapore and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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