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Cheap flights from St. Louis to Singapore from $469

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Singapore departing on 4/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
7:41 pm - 5:40 amSTL-SIN
44h 59m2 stops
Cathay Pacific Logo
8:15 pm - 4:47 pmSIN-STL
34h 32m2 stops
$987Cathay Pacific
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Mon, Oct 27 - Mon, Nov 10
Cathay Pacific Logo
9:41 am - 11:55 amSTL-SIN
37h 14m2 stops
Cathay Pacific Logo
6:00 pm - 9:48 pmSIN-STL
40h 48m2 stops
$1,026Cathay Pacific
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Thu, Mar 19 - Mon, Mar 23
Multiple Airlines Logo
11:18 am - 4:50 pmSTL-SIN
40h 32m2 stops
Multiple Airlines Logo
1:25 am - 11:09 pmSIN-STL
34h 44m2 stops
$1,048Multiple Airlines
Find Deal
Thu, Mar 19 - Sun, Mar 22
Cathay Pacific Logo
11:18 am - 1:05 pmSTL-SIN
36h 47m2 stops
Cathay Pacific Logo
8:15 pm - 10:24 pmSIN-STL
39h 09m2 stops
$1,063Cathay Pacific
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Tue, Mar 17 - Mon, Mar 23
Multiple Airlines Logo
6:39 am - 12:25 amSTL-SIN
28h 46m2 stops
Multiple Airlines Logo
7:40 am - 11:42 pmSIN-STL
30h 02m2 stops
$1,098Multiple Airlines
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Mon, Oct 27 - Fri, Nov 7
United Airlines Logo
8:20 am - 7:00 amSTL-SIN
33h 40m2 stops
United Airlines Logo
10:10 am - 4:27 pmSIN-STL
20h 17m1 stop
$1,116United Airlines
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Mon, Oct 27 - Mon, Nov 10
Qatar Airways Logo
4:34 pm - 8:45 amSTL-SIN
27h 11m2 stops
Qatar Airways Logo
3:15 am - 11:56 pmSIN-STL
34h 41m2 stops
$1,137Qatar Airways
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Mon, Oct 27 - Thu, Nov 6
Delta Logo
4:00 pm - 8:25 pmSTL-SIN
39h 25m2 stops
Delta Logo
1:35 am - 8:39 pmSIN-STL
56h 04m2 stops
$1,145Delta
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Mon, Mar 16 - Sun, Mar 22
United Airlines Logo
5:29 pm - 7:00 amSTL-SIN
24h 31m1 stop
United Airlines Logo
10:10 am - 4:27 pmSIN-STL
20h 17m1 stop
$1,175United Airlines
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Mon, Oct 27 - Fri, Nov 7
Qatar Airways Logo
8:38 am - 8:45 amSTL-SIN
34h 07m2 stops
Qatar Airways Logo
8:15 pm - 11:55 pmSIN-STL
41h 40m2 stops
$1,490Qatar Airways
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Thu, Dec 11 - Thu, Dec 25

Qatar Airways flights from St. Louis to Singapore

Our best Qatar Airways deals on St. Louis to Singapore flight tickets
Qatar Airways
Oct 27
STL4:34 pmLambert-St Louis
27h 11m
2 stops
SIN8:45 amSingapore Changi
Nov 6
SIN3:15 amSingapore Changi
34h 41m
2 stops
STL11:56 pmLambert-St Louis
$1,137
Find similar
Qatar Airways
Dec 11
STL8:38 amLambert-St Louis
34h 07m
2 stops
SIN8:45 amSingapore Changi
Dec 25
SIN8:15 pmSingapore Changi
41h 40m
2 stops
STL11:55 pmLambert-St Louis
$1,490
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Qatar Airways
Jan 2
STL2:06 pmLambert-St Louis
28h 39m
2 stops
SIN8:45 amSingapore Changi
Jan 19
SIN3:15 amSingapore Changi
49h 28m
2 stops
STL2:43 pmLambert-St Louis
$1,496
Find similar

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets
United Airlines
Oct 27
STL8:20 amLambert-St Louis
33h 40m
2 stops
SIN7:00 amSingapore Changi
Nov 10
SIN10:10 amSingapore Changi
20h 17m
1 stop
STL4:27 pmLambert-St Louis
$1,116
Find similar
United Airlines
Oct 27
STL5:29 pmLambert-St Louis
24h 31m
1 stop
SIN7:00 amSingapore Changi
Nov 7
SIN10:10 amSingapore Changi
20h 17m
1 stop
STL4:27 pmLambert-St Louis
$1,175
Find similar
United Airlines
Oct 27
STL3:14 pmLambert-St Louis
26h 46m
2 stops
SIN7:00 amSingapore Changi
Nov 7
SIN10:10 amSingapore Changi
25h 44m
2 stops
STL9:54 pmLambert-St Louis
$1,179
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momondo 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, momondo users made 832,500 searches. Data last updated October 16, 2025.
Use the filters below to find and compare flights from St. Louis to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

7:41 pm-5:40 am

2 stops44h 59m

Singapore Changi

Mon 11/10

8:15 pm-4:47 pm

2 stops34h 32m

$987

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 3/19

9:41 am-11:55 am

2 stops37h 14m

Singapore Changi

Mon 3/23

6:00 pm-9:48 pm

2 stops40h 48m

$1,026

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 3/19

11:18 am-4:50 pm

2 stops40h 32m

Singapore Changi

Sun 3/22

1:25 am-11:09 pm

2 stops34h 44m

$1,048

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 3/17

11:18 am-1:05 pm

2 stops36h 47m

Singapore Changi

Mon 3/23

8:15 pm-10:24 pm

2 stops39h 09m

$1,063

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

6:39 am-12:25 am

2 stops28h 46m

Singapore Changi

Fri 11/7

7:40 am-11:42 pm

2 stops30h 02m

$1,098

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

8:20 am-7:00 am

2 stops33h 40m

Singapore Changi

Mon 11/10

10:10 am-4:27 pm

1 stop20h 17m

$1,116

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

4:34 pm-8:45 am

2 stops27h 11m

Singapore Changi

Thu 11/6

3:15 am-11:56 pm

2 stops34h 41m

$1,137

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 3/16

4:00 pm-8:25 pm

2 stops39h 25m

Singapore Changi

Sun 3/22

1:35 am-8:39 pm

2 stops56h 04m

$1,145

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 10/27

5:29 pm-7:00 am

1 stop24h 31m

Singapore Changi

Fri 11/7

10:10 am-4:27 pm

1 stop20h 17m

$1,175

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 12/11

8:38 am-8:45 am

2 stops34h 07m

Singapore Changi

Thu 12/25

8:15 pm-11:55 pm

2 stops41h 40m

$1,490

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Singapore from

How to get the cheapest flight ticket from St. Louis to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from St. Louis to Singapore is on a Tuesday when prices can be found for as low as $1,370. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,691.

What is the cheapest time of day to depart on your flight to Singapore?

In the evening is the cheapest time of day to fly from St. Louis to Singapore when you can find flight prices for as low as $1,420. Flying to Singapore in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,572 on average. Flights to Singapore from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap St. Louis to Singapore flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Singapore

Direct flights

None
There are no direct flights from St. Louis to Singapore. There are no popular flight routes from St. Louis to Singapore.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Singapore?

    Prices for flights from Lambert-St Louis Airport to Singapore are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Singapore?

  • How old do you have to be to fly from Lambert-St Louis Airport to Singapore?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Singapore.

  • What documentation or ID do you need to fly to Singapore?

    The required travel and health documents for your Singapore trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Singapore. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from St. Louis to Singapore

Compare and see reviews for airlines that fly from St. Louis to Singapore with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $1,094Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Singapore?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Singapore from St. Louis.

Can I find flights from St. Louis to Singapore with flexible booking policies on momondo?

Yes. All flights to Singapore from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Singapore?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Singapore.

I’m not ready to book a flight from St. Louis to Singapore right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Singapore flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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