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$537+ Cheap flights from St. Louis (STL) to Singapore

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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from St. Louis to Singapore

Keep the following information in mind while searching for St. Louis to Singapore flight deals. Data was last updated November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$994
(oojo)

One-way from

$537
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,307
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
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One-way flight from Lambert-St Louis to Singapore
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Highest demand for flights based on searches. 4% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 11/135:29 pmSTL - SIN
1 stop24h 31mUnited Airlines
Wed 11/2610:10 amSIN - STL
1 stop20h 17mUnited Airlines
Deal found 11/5$1,114
This Orbitz deal was found by Cheapflights users on 11/5. 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.
Thu 11/207:00 amSTL - SIN
2 stops48h 55mMultiple Airlines
Tue 11/258:50 amSIN - STL
2 stops22h 49mMultiple Airlines
Deal found 11/5$1,574
This Qatar Airways deal was found by Cheapflights users on 11/5. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:44 amSTL - SIN
2 stops32h 01mQatar Airways
Tue 11/253:15 amSIN - STL
2 stops47h 04mQatar Airways
Deal found 11/5$1,589
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 11/208:20 amSTL - SIN
2 stops33h 40mUnited Airlines
Tue 11/2510:10 amSIN - STL
1 stop20h 17mUnited Airlines
Deal found 11/5$1,673
This Mytrip deal was found by Cheapflights users on 11/5. 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.
Thu 11/208:00 amSTL - SIN
3 stops33h 00mAir Canada
Tue 11/258:50 amSIN - STL
2 stops44h 39mAir Canada
Deal found 11/5$2,326
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 12/2011:05 amSTL - SIN
2 stops43h 10mUnited Airlines
Sat 12/2710:45 amSIN - STL
2 stops48h 58mUnited Airlines
Deal found 11/5$2,536
This KLM deal was found by Cheapflights users on 11/4. 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.
Sat 12/207:02 pmSTL - SIN
2 stops31h 13mKLM
Fri 12/261:40 amSIN - STL
2 stops29h 50mKLM
Deal found 11/4$2,671
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:14 pmSTL - SIN
1 stop35h 31mMultiple Airlines
Tue 11/251:35 amSIN - STL
2 stops30h 43mMultiple Airlines
Deal found 11/5$2,781
This Expedia deal was found by Cheapflights users on 11/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:26 pmSTL - SIN
2 stops58h 09mMultiple Airlines
Fri 12/262:20 amSIN - STL
2 stops35h 31mMultiple Airlines
Deal found 11/5$2,968

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 November 6, 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

Wed 1/14

11:05 am-4:50 pm

2 stops39h 45m

Singapore Changi

Mon 2/2

7:40 am-9:15 pm

2 stops27h 35m

$994

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

11:05 am-3:45 pm

2 stops38h 40m

Singapore Changi

Sat 1/31

4:45 pm-6:14 pm

2 stops39h 29m

$1,094

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 2/19

2:45 pm-8:00 am

2 stops27h 15m

Singapore Changi

Tue 3/3

10:10 am-10:14 pm

3 stops26h 04m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 3/8

5:59 pm-11:55 am

2 stops28h 56m

Singapore Changi

Thu 3/12

2:05 pm-5:57 pm

2 stops40h 52m

$1,149

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

6:00 pm-8:15 pm

2 stops36h 15m

Singapore Changi

Sat 1/31

10:20 pm-5:11 am

1 stop20h 51m

$1,229

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 1/14

5:00 pm-8:00 am

1 stop25h 00m

Singapore Changi

Mon 2/2

10:10 am-10:00 pm

2 stops25h 50m

$1,377

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 3/8

5:25 pm-8:00 am

1 stop25h 35m

Singapore Changi

Thu 3/12

10:20 pm-12:21 pm

2 stops27h 01m

$1,524

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/23

7:00 am-12:25 pm

3 stops40h 25m

$537

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/23

4:43 pm-8:45 am

2 stops27h 02m

$552

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/23

5:25 pm-8:15 pm

1 stop37h 50m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 15 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 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 SG?

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 November 6, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Singapore in the evening. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking 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 November 6, 2025.
Read through reviews of airlines operating flights from St. Louis to Singapore, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,007 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 airport do you fly from for flights from St. Louis to Singapore?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Singapore. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • 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 15m. The time it takes to get you to your destination can typically vary by up to 12h 30m. The distance between St. Louis and Singapore is about 9513 mi. 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 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

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,439FlexibilityNo cancel feeOn-time69%

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