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Cheap flights from St. Louis to Singapore from $475

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 4/29. 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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Find the cheapest flights from St. Louis to Singapore

Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
6:21 am - 12:45 am
STL
-
SIN
29h 24m
2 stops
Cathay Pacific Logo
1:45 am - 11:57 pm
SIN
-
STL
35h 12m
2 stops
$932Cathay Pacific
Wed, Apr 8 - Tue, Apr 14
Multiple Airlines Logo
6:21 am - 3:40 pm
STL
-
SIN
44h 19m
2 stops
Multiple Airlines Logo
7:20 am - 11:57 pm
SIN
-
STL
29h 37m
2 stops
$978Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Air Canada Logo
2:20 pm - 5:15 am
STL
-
SIN
49h 55m
2 stops
Air Canada Logo
7:00 am - 8:05 pm
SIN
-
STL
50h 05m
2 stops
$982Air Canada
Sat, May 2 - Sun, May 17
Cathay Pacific Logo
6:21 am - 5:30 am
STL
-
SIN
34h 09m
2 stops
Cathay Pacific Logo
7:20 am - 11:57 pm
SIN
-
STL
29h 37m
2 stops
$1,007Cathay Pacific
Tue, Apr 7 - Tue, Apr 14
Air Canada Logo
2:40 pm - 5:15 am
STL
-
SIN
25h 35m
2 stops
Air Canada Logo
7:00 am - 6:27 pm
SIN
-
STL
48h 27m
2 stops
$1,029Air Canada
Tue, Aug 11 - Tue, Aug 18
Air Canada Logo
7:30 am - 5:15 am
STL
-
SIN
32h 45m
2 stops
Air Canada Logo
7:00 am - 8:05 pm
SIN
-
STL
26h 05m
2 stops
$1,053Air Canada
Tue, May 5 - Sun, May 17
Air Canada Logo
1:00 pm - 5:15 am
STL
-
SIN
27h 15m
2 stops
Air Canada Logo
7:00 am - 8:05 pm
SIN
-
STL
26h 05m
2 stops
$1,070Air Canada
Sun, May 3 - Sat, May 9
Qatar Airways Logo
2:29 pm - 8:50 am
STL
-
SIN
29h 21m
2 stops
Qatar Airways Logo
3:15 am - 7:33 pm
SIN
-
STL
29h 18m
2 stops
$1,152Qatar Airways
Wed, Apr 1 - Tue, Apr 7
Cathay Pacific Logo
6:21 am - 11:45 am
STL
-
SIN
40h 24m
2 stops
Cathay Pacific Logo
6:00 pm - 11:59 pm
SIN
-
STL
42h 59m
2 stops
$1,168Cathay Pacific
Mon, May 11 - Mon, May 18
United Airlines Logo
8:30 am - 6:45 am
STL
-
SIN
33h 15m
1 stop
United Airlines Logo
9:00 am - 6:24 pm
SIN
-
STL
22h 24m
1 stop
$1,177United Airlines
Tue, Apr 7 - Tue, Apr 14

Qatar Airways flights from St. Louis to Singapore

Our best Qatar Airways deals on St. Louis to Singapore flight tickets
Qatar Airways
Apr 1
STL2:29 pmLambert-St Louis
29h 21m
2 stops
SIN8:50 amSingapore Changi
Apr 7
SIN3:15 amSingapore Changi
29h 18m
2 stops
STL7:33 pmLambert-St Louis
$1,152
Qatar Airways
Apr 6
STL7:00 amLambert-St Louis
36h 50m
2 stops
SIN8:50 amSingapore Changi
Apr 12
SIN3:15 amSingapore Changi
33h 31m
2 stops
STL11:46 pmLambert-St Louis
$1,199

Air Canada flights from St. Louis to Singapore

Our best Air Canada deals on St. Louis to Singapore flight tickets
Air Canada
May 2
STL2:20 pmLambert-St Louis
49h 55m
2 stops
SIN5:15 amSingapore Changi
May 17
SIN7:00 amSingapore Changi
50h 05m
2 stops
STL8:05 pmLambert-St Louis
$982
Air Canada
Aug 11
STL2:40 pmLambert-St Louis
25h 35m
2 stops
SIN5:15 amSingapore Changi
Aug 18
SIN7:00 amSingapore Changi
48h 27m
2 stops
STL6:27 pmLambert-St Louis
$1,029
Air Canada
May 5
STL7:30 amLambert-St Louis
32h 45m
2 stops
SIN5:15 amSingapore Changi
May 17
SIN7:00 amSingapore Changi
26h 05m
2 stops
STL8:05 pmLambert-St Louis
$1,053

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 February 23, 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

Wed 4/8

6:21 am-12:45 am

2 stops29h 24m

Singapore Changi

Tue 4/14

1:45 am-11:57 pm

2 stops35h 12m

$932

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/7

6:21 am-3:40 pm

2 stops44h 19m

Singapore Changi

Tue 4/14

7:20 am-11:57 pm

2 stops29h 37m

$978

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 5/2

2:20 pm-5:15 am

2 stops49h 55m

Singapore Changi

Sun 5/17

7:00 am-8:05 pm

2 stops50h 05m

$982

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/7

6:21 am-5:30 am

2 stops34h 09m

Singapore Changi

Tue 4/14

7:20 am-11:57 pm

2 stops29h 37m

$1,007

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 8/11

2:40 pm-5:15 am

2 stops25h 35m

Singapore Changi

Tue 8/18

7:00 am-6:27 pm

2 stops48h 27m

$1,029

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 5/5

7:30 am-5:15 am

2 stops32h 45m

Singapore Changi

Sun 5/17

7:00 am-8:05 pm

2 stops26h 05m

$1,053

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/3

1:00 pm-5:15 am

2 stops27h 15m

Singapore Changi

Sat 5/9

7:00 am-8:05 pm

2 stops26h 05m

$1,070

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 4/1

2:29 pm-8:50 am

2 stops29h 21m

Singapore Changi

Tue 4/7

3:15 am-7:33 pm

2 stops29h 18m

$1,152

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 5/11

6:21 am-11:45 am

2 stops40h 24m

Singapore Changi

Mon 5/18

6:00 pm-11:59 pm

2 stops42h 59m

$1,168

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/7

8:30 am-6:45 am

1 stop33h 15m

Singapore Changi

Tue 4/14

9:00 am-6:24 pm

1 stop22h 24m

$1,177

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 2% on your flight if you consider stops on a St. Louis to Singapore flight.

When to book flights from St. Louis to Singapore

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Singapore according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Singapore (STL to SIN) flight deals and tips

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

Fastest flight time

25h 55m

Direct flights

None
The fastest flight from St. Louis to Singapore takes 25h 55m
There are no direct flights from St. Louis to Singapore. There are no popular flight routes from St. Louis to Singapore.
Search flight deals

  • How far is Lambert-St Louis to Singapore Changi by plane?

    Singapore Changi is 9530.1 mi away from Lambert-St Louis. In terms of flight time, this usually takes a little over 25h 55m.

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

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

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

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

    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 Changi Airport.

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

    The travel and health documents you'll need for your trip to Singapore Changi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Singapore Changi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Singapore?

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
9,342 reviews
Search United Airlines flights

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Singapore for you.

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

All flight searches from St. Louis to Singapore on momondo can be filtered to show those which offer flexible booking policies.

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?

If you are simply researching potential flights to Singapore, momondo offers a useful price alert feature which will track prices for flights to Singapore from St. Louis and alert you when they change.

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