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Cheap flights from St. Louis to Singapore from $590

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 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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.
Air Canada Logo
8:55 am - 5:15 am
STL
-
SIN
31h 20m
2 stops
Air Canada Logo
7:00 am - 2:00 pm
SIN
-
STL
44h 00m
2 stops
$1,124Air Canada
Tue, Sep 22 - Sat, Sep 26
Qatar Airways Logo
7:00 am - 8:50 am
STL
-
SIN
36h 50m
2 stops
Qatar Airways Logo
7:40 pm - 11:59 pm
SIN
-
STL
41h 19m
2 stops
$1,166Qatar Airways
Wed, Oct 7 - Mon, Oct 12
Qatar Airways Logo
2:33 pm - 4:15 pm
STL
-
SIN
36h 42m
2 stops
Qatar Airways Logo
7:40 pm - 11:54 pm
SIN
-
STL
41h 14m
2 stops
$1,239Qatar Airways
Sun, May 3 - Tue, May 19
Qatar Airways Logo
12:27 pm - 4:15 pm
STL
-
SIN
38h 48m
2 stops
Qatar Airways Logo
7:40 pm - 11:54 pm
SIN
-
STL
41h 14m
2 stops
$1,266Qatar Airways
Tue, May 5 - Tue, May 19
Qatar Airways Logo
7:00 am - 9:20 am
STL
-
SIN
37h 20m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,275Qatar Airways
Mon, May 4 - Tue, May 19
Qatar Airways Logo
7:00 am - 9:20 am
STL
-
SIN
37h 20m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,276Qatar Airways
Wed, May 6 - Fri, May 22
Qatar Airways Logo
12:27 pm - 4:15 pm
STL
-
SIN
38h 48m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,280Qatar Airways
Thu, Apr 30 - Tue, May 19
Qatar Airways Logo
6:00 am - 9:20 am
STL
-
SIN
38h 20m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,289Qatar Airways
Wed, May 13 - Tue, May 19
Qatar Airways Logo
7:12 am - 4:15 pm
STL
-
SIN
44h 03m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,306Qatar Airways
Sat, May 2 - Sun, May 17
Qatar Airways Logo
7:00 am - 9:20 am
STL
-
SIN
37h 20m
2 stops
Qatar Airways Logo
1:05 am - 11:54 pm
SIN
-
STL
35h 49m
2 stops
$1,315Qatar Airways
Mon, May 4 - Fri, May 15

Air Canada flights from St. Louis to Singapore

Our best Air Canada deals on St. Louis to Singapore flight tickets
Air Canada
Sep 22
STL8:55 amLambert-St Louis
31h 20m
2 stops
SIN5:15 amSingapore Changi
Sep 26
SIN7:00 amSingapore Changi
44h 00m
2 stops
STL2:00 pmLambert-St Louis
$1,124
Air Canada
May 21
STL7:05 amLambert-St Louis
33h 10m
2 stops
SIN5:15 amSingapore Changi
May 28
SIN7:00 amSingapore Changi
50h 25m
2 stops
STL8:25 pmLambert-St Louis
$1,329
Air Canada
May 13
STL2:15 pmLambert-St Louis
50h 00m
2 stops
SIN5:15 amSingapore Changi
May 21
SIN7:00 amSingapore Changi
29h 57m
2 stops
STL11:57 pmLambert-St Louis
$1,446

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets
United Airlines
May 4
STL8:30 pmLambert-St Louis
33h 05m
2 stops
SIN6:35 pmSingapore Changi
May 20
SIN8:35 pmSingapore Changi
22h 12m
1 stop
STL5:47 amLambert-St Louis
$1,530
United Airlines
May 3
STL8:30 amLambert-St Louis
33h 15m
1 stop
SIN6:45 amSingapore Changi
May 21
SIN8:45 amSingapore Changi
22h 32m
1 stop
STL6:17 pmLambert-St Louis
$1,576
United Airlines
May 1
STL8:30 pmLambert-St Louis
33h 05m
2 stops
SIN6:35 pmSingapore Changi
May 20
SIN8:35 pmSingapore Changi
22h 12m
1 stop
STL5:47 amLambert-St Louis
$1,580

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 April 11, 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

Cheapest round-trip

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/22

8:55 am-5:15 am

2 stops31h 20m

Singapore Changi

Sat 9/26

7:00 am-2:00 pm

2 stops44h 00m

$1,124

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 10/7

7:00 am-8:50 am

2 stops36h 50m

Singapore Changi

Mon 10/12

7:40 pm-11:59 pm

2 stops41h 19m

$1,166

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/3

2:33 pm-4:15 pm

2 stops36h 42m

Singapore Changi

Tue 5/19

7:40 pm-11:54 pm

2 stops41h 14m

$1,239

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 5/5

12:27 pm-4:15 pm

2 stops38h 48m

Singapore Changi

Tue 5/19

7:40 pm-11:54 pm

2 stops41h 14m

$1,266
Quickest round-trip

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 5/4

7:00 am-9:20 am

2 stops37h 20m

Singapore Changi

Tue 5/19

1:05 am-11:54 pm

2 stops35h 49m

$1,275

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 5/6

7:00 am-9:20 am

2 stops37h 20m

Singapore Changi

Fri 5/22

1:05 am-11:54 pm

2 stops35h 49m

$1,276

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 4/30

12:27 pm-4:15 pm

2 stops38h 48m

Singapore Changi

Tue 5/19

1:05 am-11:54 pm

2 stops35h 49m

$1,280

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 5/13

6:00 am-9:20 am

2 stops38h 20m

Singapore Changi

Tue 5/19

1:05 am-11:54 pm

2 stops35h 49m

$1,289

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 5/2

7:12 am-4:15 pm

2 stops44h 03m

Singapore Changi

Sun 5/17

1:05 am-11:54 pm

2 stops35h 49m

$1,306

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 5/4

7:00 am-9:20 am

2 stops37h 20m

Singapore Changi

Fri 5/15

1:05 am-11:54 pm

2 stops35h 49m

$1,315

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

What is the typical price of a round-trip flight between St. Louis and Singapore?

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

You could potentially save up to 1% 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 35m

Direct flights

None
The fastest flight from St. Louis to Singapore takes 25h 35m
There are no direct flights from St. Louis to Singapore. There are no popular flight routes from St. Louis to Singapore.
Search flight deals

Frequently asked questions about flying from St. Louis to Singapore

  • 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 35m.

  • 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
9,569 reviews
Search United Airlines flights

Why use momondo?

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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