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Cheap flights from St. Louis to Singapore from $474

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 3/18. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
12:11 pm - 3:40 pm
STL
-
SIN
38h 29m
2 stops
Cathay Pacific Logo
6:00 pm - 11:59 pm
SIN
-
STL
42h 59m
2 stops
$1,042Cathay Pacific
Mon, Apr 20 - Mon, May 4
Cathay Pacific Logo
12:11 pm - 3:40 pm
STL
-
SIN
38h 29m
2 stops
Cathay Pacific Logo
6:00 pm - 11:59 pm
SIN
-
STL
42h 59m
2 stops
$1,043Cathay Pacific
Mon, Apr 20 - Mon, May 4
Cathay Pacific Logo
12:11 pm - 5:30 am
STL
-
SIN
28h 19m
2 stops
Cathay Pacific Logo
8:05 pm - 6:27 pm
SIN
-
STL
35h 22m
2 stops
$1,093Cathay Pacific
Mon, Apr 20 - Sun, May 3
Cathay Pacific Logo
12:11 pm - 8:50 pm
STL
-
SIN
43h 39m
2 stops
Cathay Pacific Logo
1:45 am - 6:27 pm
SIN
-
STL
29h 42m
2 stops
$1,095Cathay Pacific
Mon, Apr 20 - Sun, May 3
Cathay Pacific Logo
12:11 pm - 5:30 am
STL
-
SIN
28h 19m
2 stops
Cathay Pacific Logo
1:45 am - 6:27 pm
SIN
-
STL
29h 42m
2 stops
$1,119Cathay Pacific
Tue, Apr 21 - Tue, May 5
Cathay Pacific Logo
6:11 pm - 12:25 pm
STL
-
SIN
29h 14m
2 stops
Cathay Pacific Logo
8:05 pm - 6:27 pm
SIN
-
STL
35h 22m
2 stops
$1,122Cathay Pacific
Wed, Apr 22 - Sun, May 3
United Airlines Logo
7:05 pm - 6:45 am
STL
-
SIN
22h 40m
1 stop
United Airlines Logo
8:35 pm - 4:57 pm
SIN
-
STL
33h 22m
2 stops
$1,127United Airlines
Mon, Apr 20 - Tue, May 5
Cathay Pacific Logo
6:20 am - 11:45 am
STL
-
SIN
40h 25m
2 stops
Cathay Pacific Logo
1:25 pm - 6:27 pm
SIN
-
STL
42h 02m
2 stops
$1,131Cathay Pacific
Sun, Apr 19 - Mon, May 4
United Airlines Logo
8:30 am - 6:35 pm
STL
-
SIN
45h 05m
1 stop
United Airlines Logo
8:35 pm - 5:47 am
SIN
-
STL
22h 12m
1 stop
$1,136United Airlines
Sun, Apr 19 - Wed, May 6
United Airlines Logo
8:30 am - 6:35 pm
STL
-
SIN
45h 05m
1 stop
United Airlines Logo
8:35 pm - 8:18 am
SIN
-
STL
24h 43m
2 stops
$1,141United Airlines
Sun, Apr 19 - Mon, May 4

Qatar Airways flights from St. Louis to Singapore

Our best Qatar Airways deals on St. Louis to Singapore flight tickets
Qatar Airways
Feb 26
STL9:37 amLambert-St Louis
39h 18m
2 stops
SIN2:55 pmSingapore Changi
Mar 5
SIN8:15 pmSingapore Changi
38h 57m
2 stops
STL9:12 pmLambert-St Louis
$1,148
Qatar Airways
Apr 5
STL10:33 amLambert-St Louis
33h 17m
2 stops
SIN8:50 amSingapore Changi
Apr 11
SIN7:40 pmSingapore Changi
41h 08m
2 stops
STL11:48 pmLambert-St Louis
$1,238
Qatar Airways
Mar 13
STL2:47 pmLambert-St Louis
52h 58m
2 stops
SIN8:45 amSingapore Changi
Mar 19
SIN3:15 amSingapore Changi
32h 43m
2 stops
STL10:58 pmLambert-St Louis
$1,712

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets
United Airlines
Apr 20
STL7:05 pmLambert-St Louis
22h 40m
1 stop
SIN6:45 amSingapore Changi
May 5
SIN8:35 pmSingapore Changi
33h 22m
2 stops
STL4:57 pmLambert-St Louis
$1,127
United Airlines
Apr 19
STL8:30 amLambert-St Louis
45h 05m
1 stop
SIN6:35 pmSingapore Changi
May 5
SIN9:00 amSingapore Changi
22h 22m
1 stop
STL6:22 pmLambert-St Louis
$1,136
United Airlines
Apr 19
STL8:30 amLambert-St Louis
45h 05m
1 stop
SIN6:35 pmSingapore Changi
May 4
SIN8:35 pmSingapore Changi
24h 43m
2 stops
STL8:18 amLambert-St Louis
$1,141

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 January 29, 2026.
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 4/20

12:11 pm-3:40 pm

2 stops38h 29m

Singapore Changi

Mon 5/4

6:00 pm-11:59 pm

2 stops42h 59m

$1,042

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 4/20

12:11 pm-3:40 pm

2 stops38h 29m

Singapore Changi

Mon 5/4

6:00 pm-11:59 pm

2 stops42h 59m

$1,043

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 4/20

12:11 pm-5:30 am

2 stops28h 19m

Singapore Changi

Sun 5/3

8:05 pm-6:27 pm

2 stops35h 22m

$1,093

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 4/20

12:11 pm-8:50 pm

2 stops43h 39m

Singapore Changi

Sun 5/3

1:45 am-6:27 pm

2 stops29h 42m

$1,095

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/21

12:11 pm-5:30 am

2 stops28h 19m

Singapore Changi

Tue 5/5

1:45 am-6:27 pm

2 stops29h 42m

$1,119

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 4/22

6:11 pm-12:25 pm

2 stops29h 14m

Singapore Changi

Sun 5/3

8:05 pm-6:27 pm

2 stops35h 22m

$1,122

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 4/20

7:05 pm-6:45 am

1 stop22h 40m

Singapore Changi

Tue 5/5

8:35 pm-4:57 pm

2 stops33h 22m

$1,127

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 4/19

6:20 am-11:45 am

2 stops40h 25m

Singapore Changi

Mon 5/4

1:25 pm-6:27 pm

2 stops42h 02m

$1,131

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 4/19

8:30 am-6:35 pm

1 stop45h 05m

Singapore Changi

Wed 5/6

8:35 pm-5:47 am

1 stop22h 12m

$1,136

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 4/19

8:30 am-6:35 pm

1 stop45h 05m

Singapore Changi

Mon 5/4

8:35 pm-8:18 am

2 stops24h 43m

$1,141

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

Can stopping save me money on St. Louis to Singapore flights?

You could potentially save up to 23% on your flight if you consider stops on a St. Louis to Singapore flight.

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

Fastest flight time

28h 05m

Direct flights

None
The fastest flight from St. Louis to Singapore takes 28h 05m
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
9,215 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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