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$1,136+ Cheap flights from St. Louis (STL) to Singapore

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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,136
(Air Canada)

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
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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 17, 2025.

This Air Canada deal was found by Cheapflights users on 4/17. 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 6/17:30 amSTL - SIN
2 stops34h 35mAir Canada
Sun 6/89:10 amSIN - STL
2 stops47h 48mAir Canada
Deal found 4/17$1,136
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 5/116:11 pmSTL - SIN
1 stop23h 34mUnited Airlines
Wed 5/219:00 amSIN - STL
1 stop20h 52mUnited Airlines
Deal found 4/17$1,143
This Gurufare deal was found by Cheapflights users on 4/17. 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.
Sun 5/116:52 amSTL - SIN
2 stops28h 58mCathay Pacific
Tue 5/201:50 amSIN - STL
2 stops29h 43mCathay Pacific
Deal found 4/17$1,349
This oojo deal was found by Cheapflights users on 4/17. 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 5/243:03 pmSTL - SIN
2 stops44h 32mChina Airlines
Sat 5/312:00 amSIN - STL
2 stops59h 04mChina Airlines
Deal found 4/17$1,854
This AranGrant deal was found by Cheapflights users on 4/17. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:23 amSTL - SIN
2 stops27h 57mJapan Airlines
Wed 10/89:50 pmSIN - STL
2 stops28h 09mJapan Airlines
Deal found 4/17$1,931
This Korean Air deal was found by Cheapflights users on 4/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/16:45 amSTL - SIN
2 stops27h 55mMultiple Airlines
Sat 6/71:10 amSIN - STL
2 stops25h 16mMultiple Airlines
Deal found 4/17$2,131
This Delta deal was found by Cheapflights users on 4/17. 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.
Tue 9/96:30 amSTL - SIN
2 stops33h 30mDelta
Mon 9/221:10 amSIN - STL
2 stops36h 27mDelta
Deal found 4/17$2,607
This KAYAK deal was found by Cheapflights users on 4/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/196:20 amSTL - SIN
2 stops37h 40mQatar Airways
Fri 7/43:10 amSIN - STL
2 stops30h 13mQatar Airways
Deal found 4/17$3,208
This Lufthansa deal was found by Cheapflights users on 4/17. 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.
Sun 6/13:30 pmSTL - SIN
1 stop35h 55mLufthansa
Sat 6/712:05 amSIN - STL
2 stops28h 25mLufthansa
Deal found 4/17$3,643
This oojo deal was found by Cheapflights users on 4/16. 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.
Fri 5/1610:31 amSTL - SIN
3 stops44h 54mBritish Airways
Tue 5/2711:20 pmSIN - STL
2 stops34h 38mBritish Airways
Deal found 4/16$11,092

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 17, 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 6/1

7:30 am-7:05 am

2 stops34h 35m

Singapore Changi

Sun 6/8

9:10 am-7:58 pm

2 stops47h 48m

$1,136

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

6:11 pm-6:45 am

1 stop23h 34m

Singapore Changi

Wed 5/21

9:00 am-4:52 pm

1 stop20h 52m

$1,143

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

6:52 am-12:50 am

2 stops28h 58m

Singapore Changi

Tue 5/20

1:50 am-6:33 pm

2 stops29h 43m

$1,349

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 5/24

3:03 pm-12:35 am

2 stops44h 32m

Singapore Changi

Sat 5/31

2:00 am-12:04 am

2 stops59h 04m

$1,854

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 9/25

7:23 am-12:20 am

2 stops27h 57m

Singapore Changi

Wed 10/8

9:50 pm-12:59 pm

2 stops28h 09m

$1,931

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 6/1

6:45 am-11:40 pm

2 stops27h 55m

Singapore Changi

Sat 6/7

1:10 am-1:26 pm

2 stops25h 16m

$2,131

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/9

6:30 am-5:00 am

2 stops33h 30m

Singapore Changi

Mon 9/22

1:10 am-12:37 am

2 stops36h 27m

$2,607

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 6/19

6:20 am-9:00 am

2 stops37h 40m

Singapore Changi

Fri 7/4

3:10 am-8:23 pm

2 stops30h 13m

$3,208

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 6/1

3:30 pm-4:25 pm

1 stop35h 55m

Singapore Changi

Sat 6/7

12:05 am-3:30 pm

2 stops28h 25m

$3,643

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 5/16

10:31 am-8:25 pm

3 stops44h 54m

Singapore Changi

Tue 5/27

11:20 pm-8:58 pm

2 stops34h 38m

$11,092

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 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 April 17, 2025.

When flying from St. Louis to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 17, 2025.
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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.
Delta
8.0
Very good
7,917 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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
849 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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
3,554 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Boarding

8.4

Entertainment

7.8

Comfort

8.2

Crew

8.7

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 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.

  • 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.
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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,453FlexibilityNo cancel feeOn-time69%

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