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$772+ 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,003
(Air Canada)

One-way from

$772
(Justfly.com)

Popular in

August

Cheapest in

November

Average price

$1,419
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. 2% potential increase in price ($39 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 May 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 May 1, 2025.

This Air Canada deal was found by Cheapflights users on 4/30. 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.
Thu 9/181:30 pmSTL - SIN
2 stops28h 35mAir Canada
Sun 10/59:10 amSIN - STL
2 stops47h 47mAir Canada
Deal found 4/30$1,003
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/111:41 pmSTL - SIN
2 stops39h 44mUnited Airlines
Wed 5/219:00 amSIN - STL
1 stop20h 52mUnited Airlines
Deal found 4/30$1,108
This Gurufare deal was found by Cheapflights users on 4/30. 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.
Thu 9/186:00 amSTL - SIN
2 stops29h 20mJapan Airlines
Sat 10/41:55 amSIN - STL
2 stops34h 04mJapan Airlines
Deal found 4/30$1,239
This StudentUniverse deal was found by Cheapflights users on 4/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/112:00 pmSTL - SIN
2 stops34h 45mCathay Pacific
Tue 6/31:50 amSIN - STL
2 stops29h 43mCathay Pacific
Deal found 4/30$1,339
This Gurufare deal was found by Cheapflights users on 4/30. 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 7/212:28 pmSTL - SIN
2 stops40h 57mFinnair
Wed 7/169:35 pmSIN - STL
2 stops33h 58mFinnair
Deal found 4/30$1,344
This Singapore Airlines deal was found by Cheapflights users on 4/30. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/183:35 pmSTL - SIN
1 stop37h 00mMultiple Airlines
Sun 10/59:00 amSIN - STL
1 stop27h 56mMultiple Airlines
Deal found 4/30$1,362
This oojo deal was found by Cheapflights users on 4/30. 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 5/246:22 pmSTL - SIN
2 stops41h 13mChina Airlines
Sat 5/312:00 amSIN - STL
2 stops49h 07mChina Airlines
Deal found 4/30$1,688
This Expedia deal was found by Cheapflights users on 4/30. 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.
Wed 5/287:00 amSTL - SIN
2 stops37h 00mQatar Airways
Tue 6/33:10 amSIN - STL
2 stops33h 54mQatar Airways
Deal found 4/30$1,756
This Delta deal was found by Cheapflights users on 4/30. 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 6/193:42 pmSTL - SIN
2 stops42h 58mDelta
Fri 7/41:10 amSIN - STL
2 stops35h 12mDelta
Deal found 4/30$2,206
This Ovago deal was found by Cheapflights users on 4/30. 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.
Wed 7/23:30 pmSTL - SIN
1 stop35h 55mLufthansa
Tue 7/1512:05 amSIN - STL
2 stops28h 42mLufthansa
Deal found 4/30$2,438

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 May 1, 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 9/18

1:30 pm-7:05 am

2 stops28h 35m

Singapore Changi

Sun 10/5

9:10 am-7:57 pm

2 stops47h 47m

$1,003

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

1:41 pm-6:25 pm

2 stops39h 44m

Singapore Changi

Wed 5/21

9:00 am-4:52 pm

1 stop20h 52m

$1,108

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 9/18

6:00 am-12:20 am

2 stops29h 20m

Singapore Changi

Sat 10/4

1:55 am-10:59 pm

2 stops34h 04m

$1,239

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 7/2

12:28 pm-6:25 pm

2 stops40h 57m

Singapore Changi

Wed 7/16

9:35 pm-6:33 pm

2 stops33h 58m

$1,344

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

5:00 am-3:25 pm

2 stops45h 25m

Singapore Changi

Tue 5/20

1:50 am-9:52 pm

2 stops33h 02m

$1,359

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 9/18

3:35 pm-5:35 pm

1 stop37h 00m

Singapore Changi

Sun 10/5

9:00 am-11:56 pm

1 stop27h 56m

$1,362

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 5/24

6:22 pm-12:35 am

2 stops41h 13m

Singapore Changi

Sat 5/31

2:00 am-2:07 pm

2 stops49h 07m

$1,688

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 5/28

7:00 am-9:00 am

2 stops37h 00m

Singapore Changi

Tue 6/3

3:10 am-12:04 am

2 stops33h 54m

$1,756

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 6/19

3:42 pm-11:40 pm

2 stops42h 58m

Singapore Changi

Fri 7/4

1:10 am-11:22 pm

2 stops35h 12m

$2,206

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 7/2

3:30 pm-4:25 pm

1 stop35h 55m

Singapore Changi

Tue 7/15

12:05 am-3:47 pm

2 stops28h 42m

$2,438

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 13 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 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 May 1, 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 May 1, 2025.
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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
1,464 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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
8.3
Very good
732 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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
7,934 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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.
Finnair
7.6
Good
1,275 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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
855 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Food

7.7

Boarding

8.4

Crew

8.7

Comfort

8.2

Overall

8.3

Entertainment

7.8

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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,454FlexibilityNo cancel feeOn-time69%

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