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Cheap flights from St. Louis to Singapore from $498

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 10/31. 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

Cathay Pacific Logo
9:56 am - 5:30 amSTL-SIN
30h 34m2 stops
Cathay Pacific Logo
8:00 am - 11:18 pmSIN-STL
28h 18m2 stops
$982Cathay Pacific
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Tue, Sep 30 - Tue, Oct 7
Cathay Pacific Logo
6:00 am - 11:55 amSTL-SIN
39h 55m2 stops
Cathay Pacific Logo
8:15 pm - 9:47 pmSIN-STL
39h 32m2 stops
$997Cathay Pacific
Find Deal
Wed, Nov 26 - Mon, Dec 8
Japan Airlines Logo
3:36 pm - 6:40 amSTL-SIN
25h 04m2 stops
Japan Airlines Logo
2:20 am - 11:08 amSIN-STL
22h 48m2 stops
$1,082Japan Airlines
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Tue, Jan 13 - Mon, Jan 26
United Airlines Logo
1:40 pm - 6:15 amSTL-SIN
27h 35m2 stops
United Airlines Logo
8:45 am - 4:54 pmSIN-STL
21h 09m1 stop
$1,095United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
United Airlines Logo
1:40 pm - 6:15 amSTL-SIN
27h 35m2 stops
United Airlines Logo
8:45 am - 10:00 pmSIN-STL
26h 15m3 stops
$1,099United Airlines
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Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
4:05 pm - 6:55 amSTL-SIN
48h 50m2 stops
Air Canada Logo
8:30 am - 3:29 pmSIN-STL
44h 59m2 stops
$1,148Air Canada
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Fri, Jan 16 - Sat, Jan 31
Logo
4:05 pm - 7:00 amSTL-SIN
48h 55m2 stops
Logo
2:30 am - 3:29 pmSIN-STL
50h 59m2 stops
$1,268
Find Deal
Wed, Nov 26 - Sun, Dec 7
Japan Airlines Logo
9:56 am - 12:20 amSTL-SIN
25h 24m2 stops
Japan Airlines Logo
1:55 am - 1:23 pmSIN-STL
24h 28m2 stops
$1,354Japan Airlines
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Mon, Sep 29 - Wed, Oct 1
Logo
4:30 pm - 12:05 pmSTL-SIN
29h 35m3 stops
Logo
1:15 pm - 1:52 pmSIN-STL
38h 37m2 stops
$1,495
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Tue, Jan 13 - Tue, Jan 27
Air Canada Logo
9:15 am - 7:05 amSTL-SIN
32h 50m2 stops
Air Canada Logo
6:15 am - 3:18 pmSIN-STL
46h 03m2 stops
$2,101Air Canada
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Tue, Sep 2 - Fri, Sep 19

Cathay Pacific flights from St. Louis to Singapore

Our best Cathay Pacific deals on St. Louis to Singapore flight tickets
Cathay Pacific
Sep 30
STL9:56 amLambert-St Louis
30h 34m
2 stops
SIN5:30 amSingapore Changi
Oct 7
SIN8:00 amSingapore Changi
28h 18m
2 stops
STL11:18 pmLambert-St Louis
$982
Find similar
Cathay Pacific
Nov 26
STL6:00 amLambert-St Louis
39h 55m
2 stops
SIN11:55 amSingapore Changi
Dec 8
SIN8:15 pmSingapore Changi
39h 32m
2 stops
STL9:47 pmLambert-St Louis
$997
Find similar
Cathay Pacific
Sep 30
STL9:56 amLambert-St Louis
30h 34m
2 stops
SIN5:30 amSingapore Changi
Oct 6
SIN1:50 amSingapore Changi
34h 28m
2 stops
STL11:18 pmLambert-St Louis
$1,027
Find similar

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets
United Airlines
Sep 30
STL1:40 pmLambert-St Louis
27h 35m
2 stops
SIN6:15 amSingapore Changi
Oct 7
SIN8:45 amSingapore Changi
21h 09m
1 stop
STL4:54 pmLambert-St Louis
$1,095
Find similar
United Airlines
Sep 30
STL1:40 pmLambert-St Louis
27h 35m
2 stops
SIN6:15 amSingapore Changi
Oct 7
SIN8:45 amSingapore Changi
26h 15m
3 stops
STL10:00 pmLambert-St Louis
$1,099
Find similar
United Airlines
Jan 13
STL10:30 amLambert-St Louis
30h 25m
2 stops
SIN6:55 amSingapore Changi
Jan 27
SIN10:10 amSingapore Changi
21h 53m
1 stop
STL6:03 pmLambert-St Louis
$1,105
Find similar

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 August 17, 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

Tue 9/30

9:56 am-5:30 am

2 stops30h 34m

Singapore Changi

Tue 10/7

8:00 am-11:18 pm

2 stops28h 18m

$982

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 11/26

6:00 am-11:55 am

2 stops39h 55m

Singapore Changi

Mon 12/8

8:15 pm-9:47 pm

2 stops39h 32m

$997

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 1/13

3:36 pm-6:40 am

2 stops25h 04m

Singapore Changi

Mon 1/26

2:20 am-11:08 am

2 stops22h 48m

$1,082

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/30

1:40 pm-6:15 am

2 stops27h 35m

Singapore Changi

Tue 10/7

8:45 am-4:54 pm

1 stop21h 09m

$1,095

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/30

1:40 pm-6:15 am

2 stops27h 35m

Singapore Changi

Tue 10/7

8:45 am-10:00 pm

3 stops26h 15m

$1,099

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

4:05 pm-6:55 am

2 stops48h 50m

Singapore Changi

Sat 1/31

8:30 am-3:29 pm

2 stops44h 59m

$1,148

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 11/26

4:05 pm-7:00 am

2 stops48h 55m

Singapore Changi

Sun 12/7

2:30 am-3:29 pm

2 stops50h 59m

$1,268

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Mon 9/29

9:56 am-12:20 am

2 stops25h 24m

Singapore Changi

Wed 10/1

1:55 am-1:23 pm

2 stops24h 28m

$1,354

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 1/13

4:30 pm-12:05 pm

3 stops29h 35m

Singapore Changi

Tue 1/27

1:15 pm-1:52 pm

2 stops38h 37m

$1,495

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 9/2

9:15 am-7:05 am

2 stops32h 50m

Singapore Changi

Fri 9/19

6:15 am-3:18 pm

2 stops46h 03m

$2,101

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 month to fly to Singapore?

The month of November is, on average, the cheapest month to fly to Singapore from St. Louis, with most prices found around $1,309. If you aren’t able to travel to Singapore during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,328.

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

Best Price Found

$498

Fastest flight time

23h 26m

Direct flights

None

Airports in Singapore

1 airport
The best one-way flight to Singapore from St. Louis in the past 72 hours is $498. The best round-trip flight deal from St. Louis to Singapore found on momondo in the last 72 hours is $982.
The fastest flight from St. Louis to Singapore takes 23h 26m
There are no direct flights from St. Louis to Singapore. Popular non-direct route for this connection is Lambert-St Louis Airport - Singapore Changi Airport.
There is 1 airport near Singapore: Singapore Changi (SIN)
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 $940Free CancellationRating
7.4
8,919 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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