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$694+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Jul 13 — Jul 201
Sun 7/13
Sun 7/20
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 July 8, 2025.

Round-trip from

$1,036
(Orbitz)

One-way from

$694
(Gurufare)

Popular in

August

Cheapest in

September

Average price

$1,423
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. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($43 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 July 8, 2025.

This Orbitz deal was found by Cheapflights users on 7/7. 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.
Sun 9/286:00 amSTL - SIN
2 stops29h 45mMultiple Airlines
Tue 10/76:15 amSIN - STL
2 stops26h 42mMultiple Airlines
Deal found 7/7$1,036
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 9/31:39 pmSTL - SIN
2 stops27h 36mUnited Airlines
Wed 9/248:45 amSIN - STL
1 stop21h 08mUnited Airlines
Deal found 7/8$1,095
This Gurufare deal was found by Cheapflights users on 7/8. 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.
Wed 9/39:56 amSTL - SIN
2 stops25h 24mJapan Airlines
Tue 9/231:55 amSIN - STL
2 stops24h 36mJapan Airlines
Deal found 7/8$1,098
This Delta deal was found by Cheapflights users on 7/7. 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.
Thu 8/218:46 amSTL - SIN
2 stops31h 14mDelta
Wed 8/271:10 amSIN - STL
2 stops25h 10mDelta
Deal found 7/7$1,110
This oojo deal was found by Cheapflights users on 7/7. 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 9/283:35 pmSTL - SIN
2 stops44h 00mChina Airlines
Mon 10/62:00 amSIN - STL
2 stops59h 03mChina Airlines
Deal found 7/7$1,213
This Alaska Airlines deal was found by Cheapflights users on 7/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/256:30 pmSTL - SIN
2 stops40h 50mAlaska Airlines
Sat 8/309:50 pmSIN - STL
2 stops39h 09mAlaska Airlines
Deal found 7/7$1,311
This Expedia deal was found by Cheapflights users on 7/7. 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.
Sun 7/2011:18 amSTL - SIN
2 stops28h 42mKorean Air
Tue 7/221:10 amSIN - STL
2 stops35h 10mKorean Air
Deal found 7/7$1,380
This Lufthansa deal was found by Cheapflights users on 7/8. 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.
Wed 9/33:30 pmSTL - SIN
1 stop35h 55mLufthansa
Tue 9/2312:05 amSIN - STL
2 stops28h 39mLufthansa
Deal found 7/8$1,902
This Air Canada deal was found by Cheapflights users on 7/7. 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.
Sun 9/281:30 pmSTL - SIN
2 stops49h 30mAir Canada
Tue 10/79:10 amSIN - STL
2 stops47h 47mAir Canada
Deal found 7/7$1,992
This KLM deal was found by Cheapflights users on 7/8. 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.
Wed 12/245:17 pmSTL - SIN
2 stops32h 58mKLM
Thu 1/81:40 amSIN - STL
2 stops29h 15mKLM
Deal found 7/8$2,055

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 July 8, 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

Sun 9/28

6:00 am-12:45 am

2 stops29h 45m

Singapore Changi

Tue 10/7

6:15 am-7:57 pm

2 stops26h 42m

$1,036

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 9/28

1:30 pm-7:05 am

2 stops28h 35m

Singapore Changi

Tue 10/7

9:10 am-7:57 pm

2 stops47h 47m

$1,094

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 9/3

5:49 pm-6:15 am

1 stop23h 26m

Singapore Changi

Wed 9/24

8:45 am-4:53 pm

1 stop21h 08m

$1,095

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 9/3

9:56 am-12:20 am

2 stops25h 24m

Singapore Changi

Tue 9/23

1:55 am-1:31 pm

2 stops24h 36m

$1,098

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 8/21

8:46 am-5:00 am

2 stops31h 14m

Singapore Changi

Wed 8/27

1:10 am-1:20 pm

2 stops25h 10m

$1,110

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 9/28

3:35 pm-12:35 am

2 stops44h 00m

Singapore Changi

Mon 10/6

2:00 am-12:03 am

2 stops59h 03m

$1,162

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 8/21

8:46 am-5:00 am

2 stops31h 14m

Singapore Changi

Thu 8/28

1:10 am-11:24 pm

2 stops35h 14m

$1,272

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 8/25

6:30 pm-12:20 am

2 stops40h 50m

Singapore Changi

Sat 8/30

9:50 pm-11:59 pm

2 stops39h 09m

$1,311

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 1/1

6:30 am-12:25 am

2 stops27h 55m

Singapore Changi

Tue 1/20

10:00 am-11:59 pm

2 stops27h 59m

$1,383

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

6:30 pm-12:50 am

2 stops40h 20m

$694

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

Showing 1-10 of 15 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 $1,008). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,673). 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 July 8, 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.

How much does it cost to fly round-trip from St. Louis to Singapore?

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 July 8, 2025.
See what other customers who have flown with Korean Air, Japan Airlines, and China Airlines 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.
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
1,104 reviews
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
1,507 reviews
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
744 reviews
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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.
Alaska Airlines
8.0
Very good
10,000 reviews
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
7,962 reviews
Korean Air
8.4
Very good
1,104 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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 $1,095. Other airlines that can offer you cheap pricing are Japan Airlines, from $1,098, and Delta, from $1,205. United Airlines is 26% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Singapore one-way?

    The cheapest airlines for a one-way flight from St. Louis to Singapore are Japan Airlines ($694), Air Canada ($719), and United Airlines ($754).

  • 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 $1,008). Flying from St. Louis to Singapore in December is currently the most expensive (average of $1,673). 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 July 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,452FlexibilityNo cancel feeOn-time69%

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